CN109939818A - A kind of beneficiation method that tailing is regrinded and device - Google Patents
A kind of beneficiation method that tailing is regrinded and device Download PDFInfo
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- CN109939818A CN109939818A CN201910247137.XA CN201910247137A CN109939818A CN 109939818 A CN109939818 A CN 109939818A CN 201910247137 A CN201910247137 A CN 201910247137A CN 109939818 A CN109939818 A CN 109939818A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000005188 flotation Methods 0.000 claims abstract description 127
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 36
- 229910052737 gold Inorganic materials 0.000 claims description 36
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- 229910000754 Wrought iron Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
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- 239000000460 chlorine Substances 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
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Abstract
The invention discloses a kind of beneficiation method that tailing is regrinded and devices, it is related to the technical field of beneficiation method, it is classified to obtain overflow pulp 2 and underflow ore pulp 3 the following steps are included: flotation tailing 1 is passed through level-one clasfficiator, overflow pulp 2 is dehydrated to obtain slag；It is passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4；Ore pulp 4 is passed through second level clasfficiator to be classified, underflow ore pulp 6 returns to grinding operation；By overflow pulp 5 be passed through it is one thick, sweep three cleaner flotation programs and carry out flotation.A kind of beneficiation method that tailing is regrinded described in the present embodiment, by carrying out graded operation twice to flotation tailing, the energy consumption of grinding operation can be effectively reduced, and, the flotation concentrate that level-one flotation circuit generates is passed through in the flotation circuit of raw ore, Re-concentration of concentrate is carried out, can reduce the energy consumption of tailings glass, reaches the technical effect for improving the rate of recovery of golden raw ore.
Description
Technical field
The present invention relates to the technical field of beneficiation method more particularly to a kind of beneficiation method that tailing is regrinded and devices.
Background technique
Gold is a kind of noble metal, and golden simple substance is solid, density height, soft, bright, anticorrosive, malleability at room temperature
It is highest in known metal.Gold and most of chemicals will not all chemically react, but can be by chlorine, fluorine, chloroazotic acid and cyanogen
Compound corrodes.Gold can be dissolved by mercury, and the nitric acid that can dissolve silver and base metal cannot dissolve gold.
The ore-dressing technique of quartz vein gold mine is mainly passed through by floatation process obtains Gold Concentrate under Normal Pressure from raw ore at present, into
It before entering floatation process, needs first to be crushed raw ore, the process flow of ore grinding and classification, existing process flow is main
Be raw ore is carried out it is broken form ore, then be classified by ore grinding twice and twice and obtain the ore pulp of ideal fineness, due to by
Ore nature and existing equipment influence, and the gold contained in the coarse fraction in tailing, which is not sorted out sufficiently, to be come, existing
Mode is still since gold content is less in tailing, to be mentioned by increasing the grinding fineness of raw ore to improve the rate of recovery of flotation
It will increase the energy consumption of ore dressing while the grinding fineness of high raw ore, to greatly improve the production cost of Gold Concentrate under Normal Pressure.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of beneficiation method that tailing is regrinded and device, main purpose are to provide
A kind of beneficiation method can be improved mining tailing rate and device, make the gold in tailing be recycled and be utilized, to reduce
The production cost of enterprise.
In order to achieve the above objectives, present invention generally provides following technical solutions:
On the one hand, the embodiment of the invention provides a kind of beneficiation methods that tailing is regrinded, this method comprises:
(1) first time graded operation: flotation tailing 1 is passed through level-one clasfficiator and is classified, overflow pulp 2 and bottom are obtained
Ore pulp 3 is flowed, overflow pulp 2 is dehydrated to obtain slag；
(2) grinding operation: it is passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4；
(3) second of graded operation；Ore pulp 4 is passed through second level clasfficiator to be classified, obtains overflow pulp 5 and underflow mine
Slurry 6, underflow ore pulp 6 return to grinding operation；
(4) roughing flotation operation: overflow pulp 5 is first subjected to roughing, obtains flotation tailing 7 and flotation concentrate 8；
(5) the selected operation of flotation: flotation concentrate 8 being carried out selected, obtains Gold Concentrate under Normal Pressure, Gold Concentrate under Normal Pressure returns again to the selected stream of raw ore
Journey；
(6) operation is scanned in flotation: tailing 7 being passed through and scans operation and scans, tailing is scanned and obtains slag.
Further, it is 60% to 65% that overflow pulp 2, which accounts for the mass fraction of flotation tailing 1, and underflow ore pulp 3 accounts for flotation tail
The mass fraction of mine 1 is 40% to 35%.
In the step (5), the fineness of ore pulp 5 is that -200 mesh contents reach 85%.
On the other hand, the embodiment of the present invention also provides a kind of ore-dressing plant that tailing is regrinded, which includes:
First classification mechanism, first classification mechanism include the first grading plant, the first drainage conduit and the second drainage conduit,
First grading plant has feed inlet, for being passed through flotation tailing, first drainage conduit to first grading plant
One end be connected to first grading plant, the other end is connected to the ore grinding device, for the ore grinding device convey
Underflow ore pulp, second drainage conduit is connected to first grading plant, for overflow pulp to be discharged；
Second classification mechanism, second classification mechanism include the second grading plant, the first feed pipe, third drainage conduit and
4th drainage conduit, one end of first feed pipe are connected to the ore grinding device, and the other end is connected to the second classification dress
It sets, the pulp conveying for handling the ore grinding device to the second grading plant, one end of the third drainage conduit is connected to
Second grading plant, the other end are connected to the ore grinding device, described for conveying underflow ore pulp to the ore grinding device
4th drainage conduit is connected to second grading plant, for overflow pulp to be discharged.
Further, tailings pump and dry arranging device, one end of the tailings pump are connected to second drainage conduit, the other end
It is connected to the dry arranging device, for sloughing the moisture of overflow pulp.
Further, flotation unit, the flotation unit are connected to the 4th drainage conduit, for receiving described second point
The overflow pulp that stage arrangement generates.
Further, first grading plant and second grading plant are cyclone.
Compared with prior art, the present invention has the following technical effect that
1, beneficiation method of the present invention can be effectively reduced by carrying out graded operation twice to flotation tailing 1
The energy consumption of grinding operation, meanwhile, it is capable to improve the rate of recovery of grinding fineness and flotation stage.
2, the flotation concentrate 8 that level-one flotation circuit generates is passed through the flotation work of raw ore by beneficiation method of the present invention
In sequence, Re-concentration of concentrate is carried out, the energy consumption of tailings glass can not only be reduced, additionally it is possible to improve the grade of spoil reclaming.
3, beneficiation method of the present invention reaches the rate of recovery for improving golden raw ore by way of increasing a small amount of energy consumption
Technical effect, to considerably increase the productivity effect of enterprise.
Detailed description of the invention
Fig. 1 is a kind of beneficiation method flow chart that tailing is regrinded provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram for the ore-dressing plant that tailing is regrinded provided in an embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
In order to which the present invention is further explained, a kind of beneficiation method that tailing is regrinded, reaches expected goal of the invention, below in conjunction with
Preferred embodiment, to a kind of beneficiation method of low-grade vulcanized lead mine proposed according to the present invention, specific embodiment, knot
Structure, feature and its effect, detailed description is as follows.In the following description, different " embodiment " or " embodiment " refers to different
It surely is the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can be by any suitable form groups
It closes.
Before elaborating a kind of beneficiation method of golden raw ore of the present invention, it is necessary to the related material referred in the present invention
Material and operation are described further, to reach better effect.
Ore grinding is made in mechanical equipment by means of the impact and mill stripping of medium (steel ball, rod iron, gravel) and ore itself
With, so that the granularity of ore is further become smaller, until grind into powder operation.
Satisfactory miberal powder is sent into the operation of next step by classification, and undesirable miberal powder is made back to ore grinding
Industry.Principle is that have different sinking speed in the medium because of granularity difference according to solid particle, particle swarm is divided into two kinds or more
The process of kind granularity level.
Underflow refers to coarse granule, high concentration or the highdensity product obtained through operations such as classification, concentration or sortings.
Overflow, which refers to, to fulfil assignment (such as sort, be classified), or after itself processing (such as clarification), from various
Equipment or the fluid of liquid container top discharge.
Flotation floats the abbreviation of ore dressing, is according to the difference of mineral particle surface physicochemical properties, by mineral floatability
The method that is sorted of difference.
Grade refers to useful element or its compound quality content ratio in ore.
The rate of recovery: refer to the mass percent of the gold and the gold in raw ore in Gold Concentrate under Normal Pressure.
It is one thick, sweep, three cleaner flotation flotation circuits, refer to and the tailing after roughing be subjected to once purging selection, the tailing after scanning
Tailings Dam is drained into as true tailings, the concentrate after scanning merges with rougher concentration carries out selected, first time cleaner tailings return
First time roughing operation, second of cleaner tailings return to selected operation for the first time, and third time cleaner tailings returns selected for the second time
Operation, the concentrate after triple cleaning become gold concentrate.
After the associated materials referred in having understood the present invention and operation, below in conjunction with specific embodiments and Fig. 1
Process flow diagram, a kind of beneficiation method of low-grade vulcanized lead mine of the present invention is further described in detail:
One, embodiment
Embodiment 1
Specific steps are as follows:
(1) first time graded operation: raw ore obtains 1050 tons of ore by broken, handles by ore grinding, classification and flotation
Afterwards, 50 tons of Gold Concentrate under Normal Pressure are obtained, flotation tailing 1 is 1000 tons, and flotation tailing 1 is passed through level-one clasfficiator and is classified, is overflow
Flowing ore pulp 2 for 630 tons is 370 tons with underflow ore pulp 3, is dehydrated to obtain 630 tons of slag to overflow pulp 2, flotation tailing 1 is
Refer to that the tailing by obtain after ore grinding, classification and flotation to raw ore, the mass fraction of flotation tailing 1 are 100% (only limit
In tailing grinding system again).
(2) grinding operation: being passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4, and ore grinding device should make fineness less than 200
Purpose miberal powder content reaches 85%；
(3) second of graded operation；Ore pulp 4 is passed through second level clasfficiator to be classified, obtaining overflow pulp 5 is 370 tons
It is 650 tons with underflow ore pulp 6, underflow ore pulp 6 returns to grinding operation, and the mass fraction of overflow pulp 5 is 37%；
(4) flotation operation: by overflow pulp 5 be passed through it is one thick, sweep, three cleaner flotation flotation circuits carry out flotation, floated
It is 15 tons that select tailing 7, which be 355 tons and flotation concentrate 8, is dehydrated to obtain slag to flotation tailing 7；
(5) flotation concentrate is passed through to raw ore flotation selecting system again.
Table 1
As shown in Table 1, amount of metal golden in golden raw ore in the present embodiment is 2660g, and the amount of metal of the gold in Gold Concentrate under Normal Pressure is
2404g, the rate of recovery 90.37%, golden amount of metal is 75g in flotation tailing Gold Concentrate under Normal Pressure, and (raw ore is floating for golden raw ore comprehensive recovery
Choosing plus+tailing flotation) it is 93.19%.
The beneficiation method that a kind of tailing of the present embodiment is regrinded, by carrying out graded operation twice to flotation tailing, wherein
Pre-classification first is carried out to flotation tailing, the lower fine fraction tailing of grade is subjected to throwing tail, underflow progress ore grinding is carried out again
Inspection graduation guarantees the release mesh for entering flotation operation, can effectively reduce the energy consumption of floatation operation；Also, it will
The flotation concentrate of selected generation is passed through in the selected process of raw ore, carries out Re-concentration of concentrate, to improve back reducing tailings grade
Also the technical effect of gold concentrate grade can be effectively ensured while yield.
Embodiment 2
Specific steps are as follows:
(1) first time graded operation: raw ore obtains 1050 tons of ore by broken, handles by ore grinding, classification and flotation
Afterwards, 50 tons of Gold Concentrate under Normal Pressure are obtained, flotation tailing 1 is 1000 tons, and flotation tailing 1 is passed through level-one clasfficiator and is classified, is overflow
Flowing ore pulp 2 for 650 tons is 350 tons with underflow ore pulp 3, is dehydrated to obtain 650 tons of slag to overflow pulp 2, flotation tailing 1 is
Refer to that the tailing by obtain after ore grinding, classification and flotation to raw ore, the mass fraction of flotation tailing 1 are 100% (only limit
In tailing grinding system again).
(2) grinding operation: being passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4, and ore grinding device should make fineness less than 200
Purpose miberal powder content reaches 87%；
(3) second of graded operation；Ore pulp 4 is passed through second level clasfficiator to be classified, obtaining overflow pulp 5 is 350 tons
It is 650 tons with underflow ore pulp 6, underflow ore pulp 6 returns to grinding operation, and the mass fraction of overflow pulp 5 is 35%；
(4) flotation operation: by overflow pulp 5 be passed through it is one thick, sweep, three cleaner flotation flotation circuits carry out flotation, floated
It is 15 tons that select tailing 7, which be 335 tons and flotation concentrate 8, is dehydrated to obtain slag to flotation tailing 7；
(5) flotation concentrate is passed through to raw ore flotation selecting system again.
Table 2
As shown in Table 2, amount of metal golden in golden raw ore in the present embodiment is 2590g, and the amount of metal of the gold in Gold Concentrate under Normal Pressure is
2341g, the rate of recovery 90.38%, golden amount of metal is 74g in flotation tailing Gold Concentrate under Normal Pressure, and (raw ore is floating for golden raw ore comprehensive recovery
Choosing plus+tailing flotation) it is 93.24%.
The beneficiation method that a kind of tailing of the present embodiment is regrinded, by carrying out graded operation twice to flotation tailing, wherein
Pre-classification first is carried out to flotation tailing, the lower fine fraction tailing of grade is subjected to throwing tail, underflow progress ore grinding is carried out again
Inspection graduation guarantees the release mesh for entering flotation operation, can effectively reduce the energy consumption of floatation operation；Also, it will
The flotation concentrate of selected generation is passed through in the selected process of raw ore, carries out Re-concentration of concentrate, to improve back reducing tailings grade
Also the technical effect of gold concentrate grade can be effectively ensured while yield.
Embodiment 3
Specific steps are as follows:
(1) first time graded operation: raw ore obtains 1050 tons of ore by broken, handles by ore grinding, classification and flotation
Afterwards, 50 tons of Gold Concentrate under Normal Pressure are obtained, flotation tailing 1 is 1000 tons, and flotation tailing 1 is passed through level-one clasfficiator and is classified, is overflow
Flowing ore pulp 2 for 600 tons is 400 tons with underflow ore pulp 3, is dehydrated to obtain 600 tons of slag to overflow pulp 2, flotation tailing 1 is
Refer to that the tailing by obtain after ore grinding, classification and flotation to raw ore, the mass fraction of flotation tailing 1 are 100% (only limit
In tailing grinding system again).
(2) grinding operation: being passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4, and ore grinding device should make fineness less than 200
Purpose miberal powder content reaches 85%；
(3) second of graded operation；Ore pulp 4 is passed through second level clasfficiator to be classified, obtaining overflow pulp 5 is 400 tons
It is 750 tons with underflow ore pulp 6, underflow ore pulp 6 returns to grinding operation, and the mass fraction of overflow pulp 5 is 40%；
(4) flotation operation: by overflow pulp 5 be passed through it is one thick, sweep, three cleaner flotation flotation circuits carry out flotation, floated
It is 18 tons that select tailing 7, which be 382 tons and flotation concentrate 8, is dehydrated to obtain slag to flotation tailing 7；
(5) flotation concentrate is passed through to raw ore flotation selecting system again.
Table 3
As shown in Table 3, amount of metal golden in golden raw ore in the present embodiment is 2630g, and the amount of metal of the gold in Gold Concentrate under Normal Pressure is
2372g, the rate of recovery 90.19%, golden amount of metal is 81g in flotation tailing Gold Concentrate under Normal Pressure, and (raw ore is floating for golden raw ore comprehensive recovery
Choosing plus+tailing flotation) it is 93.26%.
The beneficiation method that a kind of tailing of the present embodiment is regrinded can be with by carrying out graded operation twice to flotation tailing
The energy consumption of grinding operation is effectively reduced, meanwhile, it is capable to improve the rate of recovery of grinding fineness and flotation stage, also, will
The flotation concentrate that level-one flotation circuit generates is passed through in the flotation circuit of raw ore, is carried out Re-concentration of concentrate, can not only be reduced tailing
The energy consumption of processing, additionally it is possible to which the grade for improving spoil reclaming reaches the technical effect for improving the rate of recovery of golden raw ore.
Two, ore dressing data comparison
The obtained ore dressing data of above-described embodiment 1-3 and existing ore dressing data are compared, 1000 tons of ore, is had
Volume data comparison is shown in Table 4.
Table 4
As shown in Table 4, the beneficiation method that the tailing that embodiment 1-3 is used is regrinded by being classified flotation tailing twice
Operation, can effectively reduce the energy consumption of grinding operation, meanwhile, it is capable to improve the recycling of grinding fineness and flotation stage
Rate, also, the flotation concentrate that level-one flotation circuit generates is passed through in the flotation circuit of raw ore, Re-concentration of concentrate is carried out, it can not only
Enough reduce the energy consumption of tailings glass, additionally it is possible to which the grade for improving spoil reclaming increases 9800 yuan/day in energy consumption
Under the premise of, the rate of recovery of golden raw ore is increased to 93.25% by 90.46%, to reach the skill for improving the rate of recovery of golden raw ore
Art effect.
On the other hand, as shown in Fig. 2, the embodiment of the present invention also provides a kind of ore-dressing plant that tailing is regrinded, the device packet
It includes:
First classification mechanism, the first classification mechanism include the first grading plant 110, the first drainage conduit 120 and the second discharge
Pipe 130, the first grading plant 110 has feed inlet, for being passed through flotation tailing, the first drainage conduit to the first grading plant 110
120 one end is connected to the first grading plant 110, and the other end is connected to ore grinding device 30, for conveying bottom to ore grinding device 30
Ore pulp is flowed, the second drainage conduit 130 is connected to the first grading plant 110, for overflow pulp to be discharged；
Second classification mechanism, the second classification mechanism include the second grading plant 210, the first feed pipe 220, third drainage conduit
230 and the 4th drainage conduit 240, one end of the first feed pipe 220 be connected to ore grinding device 30, the other end is connected to the second classification dress
210 are set, the pulp conveying for handling ore grinding device 30 to the second grading plant 210, one end connection of third drainage conduit 23
In the second grading plant 210, the other end is connected to ore grinding device 30, for conveying underflow ore pulp, the 4th row to ore grinding device 30
Expects pipe 240 is connected to the second grading plant 210, for overflow pulp to be discharged.
In technical solution provided in an embodiment of the present invention, the effect of the first grading plant 110 is divided flotation tailing 1
Grade, the first grading plant 110 has feed inlet, for being passed through flotation tailing, the first drainage conduit 120 to the first grading plant 110
One end be connected to the first grading plant 110, the other end is connected to ore grinding device 30, and the first grading plant 110 is by flotation tailing 1
It is formed hierarchically overflow pulp 2 and underflow ore pulp 3, the first drainage conduit 12 conveys underflow ore pulp 3, ore grinding device 30 to ore grinding device 30
Ore grinding is carried out to underflow ore pulp 3, obtains ore pulp 4, the second drainage conduit 130 is connected to the first grading plant 110, excessive for being discharged
Ore pulp 2 is flowed, overflow pulp 2 is dehydrated to obtain slag by dry row's equipment, and is transported in Tailings Dam；Second grading plant
210 effect is classified to ore pulp 4, and one end of the first feed pipe 220 is connected to ore grinding device 30, and the other end is connected to
Ore pulp 4 is formed hierarchically overflow pulp 5 and underflow ore pulp 6, the first feed pipe 22 by two grading plants 210, the second grading plant 210
Ore pulp 4 is delivered to the second grading plant 210, one end of third drainage conduit 230 is connected to the second grading plant 210, the other end
It is connected to ore grinding device 30, for conveying underflow ore pulp 6 to ore grinding device 3, the 4th drainage conduit 240 is connected to the second grading plant
210, for overflow pulp 5 to be discharged, then carrying out flotation to overflow pulp 5 again can be obtained Gold Concentrate under Normal Pressure, compared with the existing technology,
Existing mode is to improve the rate of recovery of flotation by increasing the grinding fineness of raw ore, since gold content is less in tailing,
It will increase the energy consumption of ore dressing while improving the grinding fineness of raw ore, so that the production cost of Gold Concentrate under Normal Pressure is greatly improved, this
In inventive embodiments, by carrying out graded operation twice to flotation tailing, the energy consumption of grinding operation can be effectively reduced,
Meanwhile, it is capable to improve the rate of recovery of grinding fineness and flotation stage, also, the flotation concentrate that level-one flotation circuit generates is passed through
In the flotation circuit of raw ore, Re-concentration of concentrate is carried out, the energy consumption of tailings glass can not only be reduced, additionally it is possible to improve tailing again
The grade of choosing reaches the technical effect for improving the rate of recovery of golden raw ore.
Further, tailings pump 40 and dry arranging device 50 are increased, one end of tailings pump 40 is connected to the second drainage conduit
130, the other end is connected to dry arranging device 50, for sloughing the moisture of overflow pulp.In the present embodiment, 40 He of tailings pump is increased
Dry arranging device 50, the effect of tailings pump 4 are to be passed through overflow pulp 2 in dry arranging device 50 from the second drainage conduit 130, dry arranging device
50 are again carried out dehydrating overflow pulp 2, obtain slag, and slag enters Tailings Dam, and the effect of dry arranging device 50 is to tailing
Dry row's processing is carried out, tailing dry row refers to through the Tailings Slurry of beneficiation flowsheet output after multistage concentration, then through dehydration and vibration sieve etc.
The processing of high-efficiency dehydration equipment, forms the slag that aqueous small, easy precipitating is solidified and stored up using place, and slag can be transported to fixation
Place carries out dry piling, by carrying out dry row's processing to tailing, can alleviate Tailings Dam storage capacity pressure, reduce Safety of Tailings Dam
Hidden danger.
Further, flotation unit 60, flotation unit 60 are connected to the 4th drainage conduit 240, for receiving the second classification dress
Set the overflow pulp of 210 generations.In the present embodiment, flotation unit 60 is increased, the effect of flotation unit 60 is to overflow pulp 5
Flotation processing is carried out, obtains flotation tailing 7 and flotation concentrate 8, it is generally the case that flotation tailing 7 can also pass through dry arranging device 50
Be carried out dehydrating, obtain slag, slag enters Tailings Dam, and flotation concentrate 8 can return in the flotation unit 60 of golden raw ore into
Row selects again, to further increase the grade of Gold Concentrate under Normal Pressure.
Further, the first grading plant 110 and the second grading plant 210 are cyclone.In the present embodiment, further
Define that the first grading plant 110 and the second grading plant 210, the first grading plant 110 and the second grading plant 210 are rotation
Device is flowed, cyclone is a kind of common separation classifying equipoment, when two-phase mixtures liquid to be separated is all from cyclone with certain pressure
After side tangentially enters in cyclone, the strong rotational shear turbulent motion of strong Three-Dimensional Elliptic is generated.Due to coarse granule and thin
It is poor that there are granularities between grain, of different sizes by centrifugal force, centripetal buoyancy, fluid drag etc., is acted on by centrifugal sedimentation, big portion
Coarse granule is divided to be discharged through cyclone underflow opening, and most of fine grained is discharged by overflow pipe, to reach separation classification purpose.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (7)
1. a kind of beneficiation method that tailing is regrinded, which comprises the following steps:
(1) first time graded operation: flotation tailing 1 is passed through level-one clasfficiator and is classified, overflow pulp 2 and underflow mine are obtained
Slurry 3, is dehydrated to obtain slag to overflow pulp 2；
(2) grinding operation: it is passed through underflow ore pulp 3 to ore grinding device, obtains ore pulp 4；
(3) second of graded operation；Ore pulp 4 is passed through second level clasfficiator to be classified, obtains overflow pulp 5 and underflow ore pulp 6,
Underflow ore pulp 6 returns to grinding operation；
(4) roughing flotation operation: overflow pulp 5 is first subjected to roughing, obtains flotation tailing 7 and flotation concentrate 8；
(5) the selected operation of flotation: flotation concentrate 8 being carried out selected, obtains Gold Concentrate under Normal Pressure, Gold Concentrate under Normal Pressure returns again to raw ore cleaning technological flowasheet；
(6) operation is scanned in flotation: tailing 7 being passed through and scans operation and scans, tailing is scanned and obtains slag.
2. beneficiation method according to claim 1, which is characterized in that
The mass fraction that overflow pulp 2 accounts for flotation tailing 1 is 60% to 65%, and underflow ore pulp 3 accounts for the mass fraction of flotation tailing 1
It is 40% to 35%.
3. beneficiation method according to claim 1, which is characterized in that
In the step (5), the fineness of ore pulp 5 is that -200 mesh contents reach 85%.
4. a kind of ore-dressing plant that tailing is regrinded characterized by comprising
First classification mechanism, first classification mechanism includes the first grading plant, the first drainage conduit and the second drainage conduit, described
First grading plant has feed inlet, for being passed through flotation tailing to first grading plant, the one of first drainage conduit
End is connected to first grading plant, and the other end is connected to the ore grinding device, for conveying underflow to the ore grinding device
Ore pulp, second drainage conduit is connected to first grading plant, for overflow pulp to be discharged；
Second classification mechanism, second classification mechanism include the second grading plant, the first feed pipe, third drainage conduit and the 4th
Drainage conduit, one end of first feed pipe are connected to the ore grinding device, and the other end is connected to second grading plant, use
In the pulp conveying for handling the ore grinding device to the second grading plant, one end of the third drainage conduit is connected to described
Two grading plants, the other end are connected to the ore grinding device, for conveying underflow ore pulp, the 4th row to the ore grinding device
Expects pipe is connected to second grading plant, for overflow pulp to be discharged.
5. ore-dressing plant according to claim 4, which is characterized in that further include:
Tailings pump and dry arranging device, one end of the tailings pump are connected to second drainage conduit, and the other end is connected to described dry
Arranging device, for sloughing the moisture of overflow pulp.
6. ore-dressing plant according to claim 4, which is characterized in that further include:
Flotation unit, the flotation unit are connected to the 4th drainage conduit, for receiving the second grading plant generation
Overflow pulp.
7. beneficiation method according to claim 4, which is characterized in that
First grading plant and second grading plant are cyclone.
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| CN210121526U (en) * | 2019-03-29 | 2020-03-03 | 阿勒泰正元国际矿业有限公司 | Ore dressing device for regrinding tailings |
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| CN104258977A (en) * | 2014-08-06 | 2015-01-07 | 哈巴河金坝矿业有限公司 | Regrinding and rescreening method and device of gold floating tailings |
| CN105797841A (en) * | 2014-12-29 | 2016-07-27 | 北京有色金属研究总院 | Beneficiation process for increasing recovery rate of gold of refractory gold ores |
| CN105233972A (en) * | 2015-11-05 | 2016-01-13 | 鞍钢集团矿业公司 | Sorting method for anshan-type lean iron ores |
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