CN103964396B - The method of sulphur is reclaimed from sulfur-bearing leached mud - Google Patents
The method of sulphur is reclaimed from sulfur-bearing leached mud Download PDFInfo
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Abstract
The invention provides the method reclaiming sulphur from sulfur-bearing leached mud, the method comprises: in nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And described sulfur-bearing vapour mixture is carried out the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.Utilize the method for the present invention, fast and effeciently can reclaim the sulphur in sulfur-bearing leached mud, and the method is simple to operate, sulfur recovery rate is high, environmental pollution is little, and operational load is little, and maintenance of equipment rate is low, and to the not requirement of simple substance sulfur content in leached mud, applied widely, be easy to realize industrialization.
Description
Technical field
The present invention relates to chemical field, particularly, relate to the method reclaiming sulphur from sulfur-bearing leached mud.
Background technology
In oxygen leaching zinc ore concentrate technique, the elemental sulfur in zinc ore concentrate enters in leached mud in solid form, and simple substance sulfur content can up to about 80%.Elemental sulfur in leached mud is reclaimed, not only can create economic benefit, and the pollution to environment can be reduced, realize Sustainable development.The domestic and international research to leached mud recovery sulphur technique, experiment start together along with zinc sulfide concentrates high pressure extract technology.Bright Cotterell zinc factory of section of Canada is in 1981 the earliest by leached mud recovery sulphur process industry, and the method for employing is hot filter method.Hudzon Ba Yi mining and metallurgy zinc factory of company of Canada hot filter method sulfur recovery system was also gone into operation in 1993.
The technical process of hot filter method is as follows: deliver to more than sulfur melting groove steam indirect heating to sulphur fusing point from after the leaching pulp dewatering in flotation workshop, and then through molten sulfur metre filter, after filtering, clean Molten sulphur produces solid sulfur through granulating system.The example of domestic employing oxygen leaching process zinc ore concentrate is few, and is operation recent years, construction, all adopts hot filter method in the zinc factory go into operation, built.But the method has following several shortcoming: (1) maintenance of equipment rate is high: due to leached mud impure many (about 20%), molten sulfur filter operation load is large, faults frequent; (2) sulfur recovery rate is low: containing the sulphur of about 50% in the outer heat extraction filter residue of molten sulfur strainer, affect the rate of recovery of sulphur, in leached mud, impurity is more, and the rate of recovery of sulphur is lower; (3) operating environment is poor: have a large amount of sulphur steam to overflow when molten sulphur process and molten sulfur strainer slag dumping, operational condition is severe, and operative's load is large, and environmental pollution is also more serious; (4) narrow application range: the method requires that simple substance sulfur content is more than 70% in leached mud, otherwise leached mud cannot form molten state, can not carry out follow-up molten sulfur and filter, narrow application range, to smelting technology and operational requirement higher.
Thus, still have much room for improvement about the technique reclaiming sulphur from sulfur-bearing leached mud.
Summary of the invention
The present invention is intended at least to solve one of technical problem existed in prior art.For this reason, it is high that one object of the present invention is to propose a kind of sulfur recovery rate, and environmental pollution is little, and operational load is little, and maintenance rate is low, and to the not requirement of simple substance sulfur content in leached mud, the applied widely method reclaiming sulphur from sulfur-bearing leached mud.
In one aspect of the invention, the invention provides a kind of method reclaiming sulphur from sulfur-bearing leached mud.According to embodiments of the invention, the method comprises the following steps: in nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And described sulfur-bearing vapour mixture is carried out the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.Contriver finds, utilize the method for the present invention, fast and effeciently can reclaim the sulphur in sulfur-bearing leached mud, and the method is simple to operate, sulfur recovery rate is high, environmental pollution is little, operational load is little, and maintenance of equipment rate is low, and to the not requirement of simple substance sulfur content in leached mud, applied widely, be easy to realize industrialization.
According to the method reclaiming sulphur from sulfur-bearing leached mud of the embodiment of the present invention, following additional technical feature can also be had:
According to embodiments of the invention, described sulfur-bearing leached mud is oxygen leaching zinc abstraction leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and the pollution to environment can be reduced, realize Sustainable development.
According to embodiments of the invention, before carrying out described heat treated, comprise further: described sulfur-bearing leached mud is carried out filtration treatment.Thus, effectively can reduce the water-content in leached mud, and then greatly reduce the energy consumption of later sublimation step.
According to embodiments of the invention, described filtration treatment adopts vertical filter to carry out.Thereby, it is possible to effectively reduce the water-content in sulfur-bearing leached mud, obtain the sulfur-bearing leached mud that water content is lower.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thereby, it is possible to effectively reduce the energy consumption in later sublimation step.
According to embodiments of the invention, described heat treated adopts fluidizing furnace to carry out, and described fluidizing furnace comprises: body of heater, is limited with reaction compartment in described body of heater; Opening for feed, described opening for feed is arranged at below described sidewall of the furnace body, states sulfur-bearing leached mud for providing to described body of heater; Inlet mouth, described inlet mouth is arranged at described bottom of furnace body, for supplying nitrogen in described body of heater to form described nitrogen atmosphere, and discharges described remaining solid slag; Discharge port, described discharge port is arranged at above described sidewall of the furnace body, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace to be separated from sulfur-bearing leached mud by sulphur simple substance by distillation fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent sulphur by the dioxygen oxidation in air.
According to embodiments of the invention, described fluidizing furnace comprises at least one heating tube further, and described heating tube is arranged in described body of heater, remains 400-500 degree Celsius for making the temperature in described body of heater.Thereby, it is possible to effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, before carrying out described first refrigerated separation, comprise further: described sulfur-bearing vapour mixture is carried out dust removal process.Thereby, it is possible to effectively remove the impurity such as the dust in sulphur steam, obtain the sulfur product that purity is higher.
According to embodiments of the invention, described dust removal process adopts Ceramic dust collector to carry out.Thus, dust removing effects is better.
According to embodiments of the invention, at the temperature of 360-450 degree Celsius, carry out described dust removal process.Thereby, it is possible to avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, the first cooling separator is utilized to carry out described first refrigerated separation, described first cooling separator has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and is less than 30 °, and described first end is higher than described second end, described first cooling separator comprises: interior pipe, and described interior pipe is for the water coolant that circulates; Outer tube, forms cooling space between described outer tube and described interior pipe, and described cooling space is for the described sulfur-bearing vapour mixture that circulates; Cooling water inlet, described cooling water inlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described interior pipe, for providing described water coolant to described interior pipe; Cooling water outlet, described cooling water outlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described interior pipe, for discharging described water coolant; Combi inlet port, described combi inlet port is arranged at described outer tube top, and contiguous described second end, be connected with described cooling space, for providing described sulfur-bearing vapour mixture to described cooling space; Molten sulphur exports, and described Molten sulphur outlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described cooling space, for discharging described Molten sulphur; And residual gas mixture outlet, described residual gas mixture outlet is arranged at described first end, be connected with described cooling space, for discharging described residual gas mixture, wherein, described cooling water inlet and described Molten sulphur export interval and arrange, and described cooling water outlet and described combi inlet port interval are arranged.Thereby, it is possible to be effectively Molten sulphur by high temperature sulphur vapor condensation, and forms certain angle with horizontal plane due to the first end of cooling separator and the line of the second end, the Molten sulphur cooling acquisition can by bottom pipeline self to cooling separator.
According to embodiments of the invention, comprise further and described residual gas mixture is carried out the second refrigerated separation, to remove water vapor obtaining nitrogen, wherein said second refrigerated separation is that employing second cooling separator carries out, and described second cooling separator has identical structure with described first cooling separator.Thereby, it is possible to effectively remove the water vapour in nitrogen, thus recycle is carried out to nitrogen, and then effectively reduce energy consumption, minimizing cost, and water of condensation can by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thereby, it is possible to abundant recovery waste heat, improve the heat utilization efficiency of whole technique.
According to embodiments of the invention, the feedwater of discharging through described cooling water outlet is returned boiler, the de-mineralized water of discharging through described cooling water outlet is returned deoxygenator.Thereby, it is possible to realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
According to embodiments of the invention, described remaining solid slag is carried out cooling and delivering to smelting shop, to reclaim valuable metal.Thus, while being recycled by valuable metal recovery, environmental pollution can be avoided.
According to embodiments of the invention, by granulating system, described Molten sulphur is prepared as solid sulfur.Thus, effectively industrial production can be used for by reclaiming the sulphur obtained.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 shows according to one embodiment of present invention, reclaims the structural representation of the system of sulphur from sulfur-bearing leached mud.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In one aspect of the invention, the invention provides a kind of method reclaiming sulphur from sulfur-bearing leached mud.According to embodiments of the invention, the method comprises the following steps:
Heat treated
In nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, mixes with nitrogen after the element sulphur distillation in leached mud and be separated with solid slag, to obtain sulfur-bearing vapour mixture and remaining solid slag.Thus, effectively the sulphur in sulfur-bearing leached mud can be passed through sublimation separation out, thus effective recycling.
According to embodiments of the invention, described sulfur-bearing leached mud is oxygen leaching zinc abstraction leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and the pollution to environment can be reduced, realize Sustainable development.
According to embodiments of the invention, before carrying out heat treated to sulfur-bearing leached mud, sulfur-bearing leached mud that can be higher to water content in advance carries out filtration treatment.Thus, effectively can reduce the water-content in leached mud, and then greatly reduce the energy consumption of subsequent heat treatment step.
According to embodiments of the invention, the mode of described filtration treatment is not particularly limited, and those skilled in the art can select flexibly according to practical situation.According to a concrete example of the present invention, described filtration treatment adopts vertical filter to carry out.Thereby, it is possible to effectively reduce the water-content in sulfur-bearing leached mud, obtain the sulfur-bearing leached mud that water content is lower.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thereby, it is possible to effectively reduce the energy consumption in subsequent heat treatment step.
According to embodiments of the invention, described heat treated adopts fluidizing furnace to carry out, and described fluidizing furnace comprises: body of heater, is limited with reaction compartment in described body of heater; Opening for feed, described opening for feed is arranged at below described sidewall of the furnace body, states sulfur-bearing leached mud for providing to described body of heater; Inlet mouth, described inlet mouth is arranged at described bottom of furnace body, for supplying nitrogen in described body of heater to form described nitrogen atmosphere, and discharges described remaining solid slag; Discharge port, described discharge port is arranged at above described sidewall of the furnace body, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace to be separated from sulfur-bearing leached mud by sulphur simple substance by distillation fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent sulphur by the dioxygen oxidation in air.
According to embodiments of the invention, described fluidizing furnace comprises at least one heating tube further, and described heating tube is arranged in described body of heater, remains 400-500 degree Celsius for making the temperature in described body of heater.Thereby, it is possible to effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, described remaining solid slag is carried out cooling and delivering to smelting shop, to reclaim valuable metal.Thus, while being recycled by valuable metal recovery, environmental pollution can be avoided.
First refrigerated separation
Then, described sulfur-bearing vapour mixture is carried out the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.
According to embodiments of the invention, before carrying out described first refrigerated separation, comprise further: described sulfur-bearing vapour mixture is carried out dust removal process.Thereby, it is possible to effectively remove the impurity such as the dust in sulphur steam, obtain the sulfur product that purity is higher.
According to embodiments of the invention, the device of described dust removal process selects high temperature resistant dust collector.According to a concrete example of the present invention, described dust removal process adopts Ceramic dust collector to carry out.Thus, dust removing effects is better.
According to embodiments of the invention, at the temperature of 360-450 degree Celsius, carry out described dust removal process.Thereby, it is possible to avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, the first cooling separator is utilized to carry out described first refrigerated separation, described first cooling separator has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and is less than 30 °, and described first end is higher than described second end, described first cooling separator comprises: interior pipe, and described interior pipe is for the water coolant that circulates; Outer tube, forms cooling space between described outer tube and described interior pipe, and described cooling space is for the described sulfur-bearing vapour mixture that circulates; Cooling water inlet, described cooling water inlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described interior pipe, for providing described water coolant to described interior pipe; Cooling water outlet, described cooling water outlet is arranged at described outer tube top, and contiguous described second end, be connected with described interior pipe, for discharging described water coolant; Combi inlet port, described combi inlet port is arranged at described outer tube top, and contiguous described second end, be connected with described cooling space, for providing described sulfur-bearing vapour mixture to described cooling space; Molten sulphur exports, and described Molten sulphur outlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described cooling space, for discharging described Molten sulphur; And residual gas mixture outlet, described residual gas mixture outlet is arranged at described first end, be connected with described cooling space, for discharging described residual gas mixture, wherein, described cooling water inlet and described Molten sulphur export interval and arrange, and described cooling water outlet and described combi inlet port interval are arranged.Thereby, it is possible to be effectively Molten sulphur by high temperature sulphur vapor condensation, and forms certain angle with horizontal plane due to the first end of cooling separator and the line of the second end, the Molten sulphur cooling acquisition can by bottom pipeline self to cooling separator.
According to embodiments of the invention, by granulating system, described Molten sulphur is prepared as solid sulfur.Thus, effectively industrial production can be used for by reclaiming the sulphur obtained.
According to embodiments of the invention, comprise further and described residual gas mixture is carried out the second refrigerated separation, to remove water vapor obtaining nitrogen, wherein said second refrigerated separation is that employing second cooling separator carries out, and described second cooling separator has identical structure with described first cooling separator.Thereby, it is possible to effectively remove the water vapour in nitrogen, thus recycle is carried out to nitrogen, and then effectively reduce energy consumption, minimizing cost, and water of condensation can by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thereby, it is possible to abundant recovery waste heat, improve the heat utilization efficiency of whole technique.
According to embodiments of the invention, the feedwater of discharging through described cooling water outlet is returned boiler, the de-mineralized water of discharging through described cooling water outlet is returned deoxygenator.Thereby, it is possible to realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
Contriver finds, utilize the method for the present invention, fast and effeciently can reclaim the sulphur in sulfur-bearing leached mud, and the method is simple to operate, sulfur recovery rate is high, environmental pollution is little, operational load is little, and maintenance of equipment rate is low, and to the not requirement of simple substance sulfur content in leached mud, applied widely, be easy to realize industrialization.
The method reclaiming sulphur from sulfur-bearing leached mud for a better understanding of the present invention, present invention also offers the system reclaiming sulphur from sulfur-bearing leached mud:
In another aspect of the present invention, the invention provides a kind of system 1000 reclaiming sulphur from sulfur-bearing leached mud.According to embodiments of the invention, with reference to Fig. 1, this system 1000 comprises: heat treatment apparatus 100, described heat treatment apparatus 100 is in nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And the first refrigerated separation device 200, described first refrigerated separation device 200 is connected with described heat treatment apparatus 100, for described sulfur-bearing vapour mixture is carried out the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.Contriver finds, utilize this system of the present invention, the method of directly distillation can be passed through fast and effectively by the sulphur Separation and Recovery in sulfur-bearing leached mud, and sulfur recovery rate is high, environmental pollution is little, and operational load is little, maintenance of equipment rate is low, and to the not requirement of simple substance sulfur content in leached mud, applied widely, be easy to realize industrialization.
According to embodiments of the invention, described sulfur-bearing leached mud is oxygen leaching zinc abstraction leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and the pollution to environment can be reduced, realize Sustainable development.
According to embodiments of the invention, comprise filtration treatment device 300 further, described filtration treatment device 300 is connected with described heat treatment apparatus 100, for before carrying out described heat treated, described sulfur-bearing leached mud is carried out filtration treatment.Thus, effectively can reduce the water-content in sulfur-bearing leached mud, and then greatly reduce the energy consumption of heat treatment apparatus.
According to embodiments of the invention, described filtration treatment device 300 is vertical filter.Thereby, it is possible to effectively reduce the water-content in sulfur-bearing leached mud, obtain the sulfur-bearing leached mud that water content is lower.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thereby, it is possible to greatly reduce the energy consumption of heat treatment apparatus.
According to embodiments of the invention, described heat treatment apparatus 100 is fluidizing furnace, and described fluidizing furnace comprises: body of heater 101, is limited with reaction compartment (not shown) in described body of heater 101; Opening for feed 102, described opening for feed 102 is arranged at below described body of heater 101 sidewall, for providing described sulfur-bearing leached mud to described body of heater 101; Inlet mouth 103, described inlet mouth 103 is arranged at bottom described body of heater 101, for supplying nitrogen in described body of heater 101 to form described nitrogen atmosphere, and discharges described remaining solid slag; Discharge port 104, described discharge port 104 is arranged at above described body of heater 101 sidewall, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace to be separated from sulfur-bearing leached mud by sulphur simple substance by distillation fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent sulphur by the dioxygen oxidation in air.
According to embodiments of the invention, described fluidizing furnace comprises at least one heating tube (not shown) further, and described heating tube is arranged in described body of heater 101, remains 400-500 degree Celsius for making the temperature in described body of heater 101.Thereby, it is possible to effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, it is 400 degrees Celsius by temperature in described heat treatment apparatus 100.Thus, can either ensure that sulphur effectively distils, energy consumption can be reduced again, reduce costs.
According to embodiments of the invention, comprise dedusting treater 400 further, described dedusting treater 400 is connected with described first refrigerated separation device 200 with described heat treatment apparatus 100 respectively, for before carrying out described first refrigerated separation, described sulfur-bearing vapour mixture is carried out dust removal process.Thereby, it is possible to effectively remove the impurity such as the dust in sulphur steam, obtain the sulfur product that purity is higher.
According to embodiments of the invention, described dedusting treater 400 is Ceramic dust collector.Thus, dust removing effects is better.
According to embodiments of the invention, the temperature in described Ceramic dust collector is 360-450 degree Celsius.Thereby, it is possible to avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, described first refrigerated separation device 200 has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and is less than 30 °, and described first end is higher than described second end, described first refrigerated separation device 200 comprises: interior pipe (not shown), and described interior pipe is for the water coolant that circulates; Outer tube 206, forms cooling space (not shown) between described outer tube 206 and described interior pipe, and described cooling space is for the described sulfur-bearing vapour mixture that circulates; Cooling water inlet 201, described cooling water inlet 201 is arranged at bottom described outer tube 206, and contiguous described second end, be connected with described interior pipe, for providing described water coolant to described interior pipe; Cooling water outlet 202, described cooling water outlet 202 is arranged at described outer tube 206 top, and contiguous described second end, be connected with described interior pipe, for discharging described water coolant; Combi inlet port 203, described combi inlet port 203 is arranged at described outer tube 206 top, and contiguous described second end, be connected with described cooling space, for providing described sulfur-bearing vapour mixture to described cooling space; Molten sulphur outlet 204, described Molten sulphur outlet 204 is arranged at bottom described outer tube 206, and contiguous described second end, be connected with described cooling space, for discharging described Molten sulphur; And residual gas mixture outlet 205, described residual gas mixture outlet 205 is arranged at described first end, be connected with described cooling space, for discharging described residual gas mixture, wherein, described cooling water inlet 201 and described Molten sulphur export 204 intervals and arrange, and described cooling water outlet 202 and described combi inlet port 203 interval are arranged.Thereby, it is possible to be effectively Molten sulphur by high temperature sulphur vapor condensation, and forms certain angle with horizontal plane due to the first end of the first cooling separator and the line of the second end, the Molten sulphur cooling acquisition can by bottom pipeline self to cooling separator.
According to embodiments of the invention, comprise the second refrigerated separation device 500 further, described second refrigerated separation device 500 is connected with described first refrigerated separation device 200, and with described first refrigerated separation device 200, there is identical structure, for described residual gas mixture is carried out the second refrigerated separation, to remove water vapor obtaining nitrogen.Thereby, it is possible to effectively remove the water vapour in nitrogen, thus recycle is carried out to nitrogen, and then effectively reduce energy consumption, minimizing cost, and water of condensation can by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thereby, it is possible to realize the recycling of heat, effectively reduce energy consumption, save cost.
According to embodiments of the invention, comprise water shoot (not shown) further, described water shoot is connected with described cooling water outlet 202, for the feedwater of discharging through described cooling water outlet 202 is returned boiler, or the de-mineralized water of discharging through described cooling water outlet 202 is delivered to deoxygenator.Thereby, it is possible to realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
According to embodiments of the invention, comprise Residue extraction pipeline (not shown) further, described Residue extraction pipeline is connected with described heat treatment apparatus 100, for carrying out cooling and delivering to smelting shop, described remaining solid slag to reclaim valuable metal.Thus, while being recycled by valuable metal recovery, environmental pollution can be avoided.
According to embodiments of the invention, comprise liquid sulphur conveying pipe road (not shown) further, described liquid sulphur conveying pipe road is connected with described first refrigerated separation device 200 respectively and is connected with granulating system (not shown), for described Molten sulphur is delivered to described granulating system, described Molten sulphur is prepared as solid sulfur.Thus, effectively industrial production can be used for by reclaiming the sulphur obtained.
Embodiment 1
The leached mud ore pulp that solid content in oxygen leaching zinc abstraction technique is about 25% is delivered to vertical filter by ore pulp feeding pump, filter the impurity etc. obtained and send smelting shop, the water content obtained lower than 15% sulfur-bearing leached mud by constant feeder, be delivered in the reaction compartment of fluidizing furnace through opening for feed, in the reaction compartment of fluidizing furnace, under condition of negative pressure, sulfur-bearing leached mud is heated to 400-500 degree Celsius, simultaneously, by inlet mouth to supplying nitrogen in the reaction compartment of fluidizing furnace, and be 400-500 degree Celsius by the temperature that heating tube heating maintains in reaction compartment, mix with nitrogen after element sulphur distillation in leached mud and be separated with solid slag, obtain sulfur-bearing vapour mixture and remaining solid slag thus, wherein, remaining solid slag discharges reaction compartment by inlet mouth, through Residue extraction pipeline conveying smelting shop, sulfur-bearing vapour mixture discharges reaction compartment through discharge port, be transported to pyroceramic fly-ash separator, dust removal process is carried out under 360-450 degree Celsius, entered the cooling space of the first cooling separator by combi inlet port through the sulfur-bearing vapour mixture of dedusting, simultaneously, feedwater enters interior pipe by cooling water inlet, the condensation of sulfur-bearing vapour mixture is made by the heat exchange between water coolant and sulfur-bearing vapour mixture, to obtain Molten sulphur and residual gas mixture, the Molten sulphur obtained is from the bottom flowing to cooling space, exported by Molten sulphur and discharge cooling space, be delivered to granulating system through liquid sulphur conveying pipe road and make solid sulfur, feedwater through heat exchange is managed by cooling water outlet discharge, be delivered to boiler systems, the residual gas mixture obtained is exported by residual gas mixture and discharges cooling space, be transported to the cooling space of the second cooling separator, de-mineralized water enters interior pipe by cooling water inlet simultaneously, the water vapor condensation in residual gas mixture is made by the heat exchange between water coolant and residual gas mixture, to obtain nitrogen, the nitrogen obtained is transported to fluidizing furnace recycle further, de-mineralized water through heat exchange is managed by cooling water outlet discharge, be delivered to deoxygenator.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalents thereof.
Claims (8)
1. from sulfur-bearing leached mud, reclaim a method for sulphur, it is characterized in that, comprise the following steps:
In nitrogen atmosphere, under condition of negative pressure, fluidizing furnace is adopted described sulfur-bearing leached mud to be heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And
Adopt the first refrigerating unit that described sulfur-bearing vapour mixture is carried out the first refrigerated separation, to obtain Molten sulphur and residual gas mixture,
Described fluidizing furnace comprises:
Body of heater, is limited with reaction compartment in described body of heater;
Opening for feed, described opening for feed is arranged at below described sidewall of the furnace body, states sulfur-bearing leached mud for providing to described body of heater;
Inlet mouth, described inlet mouth is arranged at described bottom of furnace body, for supplying nitrogen in described body of heater to form described nitrogen atmosphere, and discharges described remaining solid slag;
Discharge port, described discharge port is arranged at above described sidewall of the furnace body, for discharging described sulfur-bearing vapour mixture,
Described first refrigerated separation device has first end and the second end, and the line of described first end and the second end and horizontal plane form angle α, and wherein α is greater than 0 ° and is less than 30 °, and described first end is higher than described second end, and described first refrigerated separation device comprises:
Interior pipe, described interior pipe is for the water coolant that circulates;
Outer tube, forms cooling space between described outer tube and described interior pipe, and described cooling space is for the described sulfur-bearing vapour mixture that circulates;
Cooling water inlet, described cooling water inlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described interior pipe, for providing described water coolant to described interior pipe;
Cooling water outlet, described cooling water outlet is arranged at described outer tube top, and contiguous described second end, be connected with described interior pipe, for discharging described water coolant;
Combi inlet port, described combi inlet port is arranged at described outer tube top, and contiguous described second end, be connected with described cooling space, for providing described sulfur-bearing vapour mixture to described cooling space;
Molten sulphur exports, and described Molten sulphur outlet is arranged at described outer pipe bottom, and contiguous described second end, be connected with described cooling space, for discharging described Molten sulphur; And
Residual gas mixture exports, and described residual gas mixture outlet is arranged at described first end, is connected with described cooling space, for discharging described residual gas mixture,
Wherein, described cooling water inlet and described Molten sulphur export interval and arrange, and described cooling water outlet and described combi inlet port interval are arranged.
2. method according to claim 1, is characterized in that, described sulfur-bearing leached mud is oxygen leaching zinc abstraction leached mud.
3. method according to claim 1, is characterized in that, before carrying out described heat treated, comprises further:
Described sulfur-bearing leached mud is carried out filtration treatment.
4. method according to claim 3, is characterized in that, moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.
5. method according to claim 1, is characterized in that, before carrying out described first refrigerated separation, comprises further:
Described sulfur-bearing vapour mixture is carried out dust removal process.
6. method according to claim 5, is characterized in that, described dust removal process adopts Ceramic dust collector to carry out.
7. method according to claim 6, is characterized in that, at the temperature of 360-450 degree Celsius, carry out described dust removal process.
8. method according to claim 1, is characterized in that, comprises further and described residual gas mixture is carried out the second refrigerated separation, to remove water vapor obtaining nitrogen.
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