CN110655088A - Production equipment and process for temperature-adjusting calcination of natural sintered mullite in rotary kiln - Google Patents
Production equipment and process for temperature-adjusting calcination of natural sintered mullite in rotary kiln Download PDFInfo
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- CN110655088A CN110655088A CN201911090731.9A CN201911090731A CN110655088A CN 110655088 A CN110655088 A CN 110655088A CN 201911090731 A CN201911090731 A CN 201911090731A CN 110655088 A CN110655088 A CN 110655088A
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- China
- Prior art keywords
- rotary kiln
- kiln body
- mullite
- cover
- calcination
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- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 52
- 238000001354 calcination Methods 0.000 title claims abstract description 25
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000446 fuel Substances 0.000 claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 238000005245 sintering Methods 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000001680 brushing effect Effects 0.000 claims description 3
- 239000003345 natural gas Substances 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 6
- 238000002485 combustion reaction Methods 0.000 description 7
- 230000004927 fusion Effects 0.000 description 4
- 239000003034 coal gas Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/20—Silicates
- C01B33/26—Aluminium-containing silicates, i.e. silico-aluminates
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The invention discloses production equipment and a process for temperature-adjusting calcination of a natural sintered mullite rotary kiln. According to the rotary kiln, the shunt cover is coaxially distributed in the rotary kiln body, the shunt cover is of a conical cover structure, the opening end of the shunt cover corresponds to the feeding pipe of the rotary kiln body, the outer wall of the shunt cover is provided with uniformly distributed vent holes, the feeding pipe extends into the shunt cover from the opening end of the shunt cover and is close to the small end of the conical cover, therefore, mullite raw materials firstly enter the small end in the conical cover and are close to the fuel pipe for primary sintering, then the rotary kiln body rotates, mullite materials flow into the outer part of the shunt cover and flow, secondary sintering is carried out, the contact area of the mullite raw materials and flame is increased, the calcining process is accelerated, and the cost input.
Description
Technical Field
The invention relates to the technical field of mullite sintering rotary kilns, in particular to production equipment and a process for temperature-adjusting calcination of a natural sintered mullite rotary kiln.
Background
Mullite is a high-grade refractory material and has the characteristics of high temperature resistance, corrosion resistance and rapid cooling and heating resistance. At present, the mullite is mainly produced by adopting a rotary kiln system, the rotary kiln is obliquely arranged on a horizontal plane, the rotary kiln rotates to realize the rolling and pushing of materials, various raw materials are fused by means of the combustion of fuel in the rotary kiln to obtain the mullite, and the rotary kiln body of the mullite is generally in a structure that one end is connected with a feed pipe through a sealing device, and the other end is connected with a fuel pipe and an air inlet pipe through a discharge device.
Because the mullite material rolls when stacked at the bottom when the rotary kiln rolls, the contact area between the mullite material and the combustion flame of fuel is low, the mullite fusion time is slow, the fuel input amount is large, the cost is high, and the existing processing technology for processing mullite by adopting the rotary kiln is single at present, the rotary speed of the rotary kiln is usually controlled to be 2.5-3r/mim, the combustion temperature in the rotary kiln is mainly controlled to be about 1700 ℃, coal gas is adopted as the fuel, and the ratio of the coal gas to the air is usually controlled to be 1; 5, thereby improving the fusion efficiency of mullite fuel while securing a combustion temperature of 1700 degrees celsius, thereby resulting in a low fuel combustion rate.
Therefore, the invention provides production equipment and a process for temperature-adjusting calcination of a natural sintered mullite rotary kiln.
Disclosure of Invention
The invention aims to: the production equipment and the process for the temperature-adjusting calcination of the natural sintered mullite rotary kiln are provided in order to solve the problems that when the natural sintered mullite raw material is heated in the rotary kiln, the rotary kiln rotates to realize the movement of stacked materials, so that the fusion of the mullite raw material is slow, the fuel input amount is large, the cost is high, the existing production process is single, and the fuel combustion efficiency is low.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a production facility and technology that natural sintering mullite rotary kiln adjusts temperature and calcines, includes the inclined distribution rotary kiln body, the one end of rotary kiln body is equipped with and is connected with the conveying pipe through sealing device, and the other end is connected with fuel pipe and air-supply line through discharge device, this internal fixed shunt cover that is provided with and rotary kiln body with the axle center distribution of rotary kiln, the shunt cover is toper and open end and is connected with the one side that is close to sealing device, the one end of conveying pipe stretches into in the shunt cover and near the tip of shunt cover, the tapering of shunt cover is twice of the acute angle that rotary kiln body and horizontal plane formed, evenly distributed's air vent is seted up to the exterior wall of shunt cover, and has seted up the blanking hole of stepping down near the oral area.
As a further description of the above technical solution:
and heat-resistant layers are coated on the inner surface wall and the outer surface wall of the shunting cover.
As a further description of the above technical solution:
the heat-resistant layer is formed by brushing aqueous slurry inorganic paint.
A mullite calcination process corresponding to production equipment for temperature-adjusting calcination of natural sintered mullite in a rotary kiln comprises the following steps:
step one, air is supplied into the rotary kiln body through an air inlet pipe, and the air supply amount is 5000-3/h；
Step two, delivering gas fuel to the rotary kiln body through a fuel pipe, wherein the gas fuel and the air delivery quantity through an air delivery pipe are 1: a ratio of 6 to 8;
igniting and burning the gas fuel, and keeping the temperature in the rotary kiln body at 1800-1900 ℃;
step four, starting the rotary kiln body to rotate at the rotating speed of 4.5-6.5 r/min;
sixthly, conveying granular raw materials into the shunting cover through the feeding pipe;
and seventhly, sintering the primary sintered mullite generated in the sixth step for the second time.
As a further description of the above technical solution:
and the gas fuel in the second step is natural gas.
As a further description of the above technical solution:
in the second step, the gas fuel and the air supply quantity through the air supply pipe are 1: 7 in the same ratio.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the rotary kiln, the shunt cover is coaxially distributed in the rotary kiln body, the shunt cover is of a conical cover structure, the opening end of the shunt cover corresponds to the feeding pipe of the rotary kiln body, the outer wall of the shunt cover is provided with uniformly distributed vent holes, the feeding pipe extends into the shunt cover from the opening end of the shunt cover and is close to the small end of the conical cover, therefore, mullite raw materials firstly enter the small end in the conical cover and are close to the fuel pipe for primary sintering, then the rotary kiln body rotates, mullite materials flow into the outer part of the shunt cover and flow, secondary sintering is carried out, the contact area of the mullite raw materials and flame is increased, the calcining process is accelerated, and the cost input.
2. In the mullite and mullite calcining process aiming at the production equipment, the air supply quantity of the gas fuel conveyed into the rotary kiln body by the fuel pipe and the air supply quantity through the air supply pipe are in a ratio of 1: 6-8, which is 1 compared with the traditional method; 5, the input of the fuel is reduced, and the combustion efficiency of the fuel is improved.
Drawings
FIG. 1 is a schematic structural diagram of the electronic transformer body, the temperature control switch, the dehumidification cylinder, the fan, the rotary roller, the motor, the belt and the absorbent cotton which are matched with the production equipment and the process for the temperature-adjusting calcination of the natural sintered mullite rotary kiln provided by the invention;
fig. 2 is a schematic structural diagram of the interior of a protective shell of the production equipment and the process for temperature-adjusting calcination of the natural sintered mullite rotary kiln provided by the invention.
Illustration of the drawings:
1. a rotary kiln body; 2. a feed pipe; 3. a fuel tube; 4. an air inlet pipe; 5. a flow dividing cover; 51. a vent hole; 52. blanking yielding holes; 6. a heat-resistant layer; 7. a sealing device; 8. a discharge device.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, a production apparatus for temperature-adjusting calcination of a natural sintered mullite rotary kiln comprises an inclined rotary kiln body 1, one end of the rotary kiln body 1 is provided with a feeding pipe 2 connected through a sealing device 7, the other end of the rotary kiln body is connected with a fuel pipe 3 and an air inlet pipe 4 through a discharging device 8, a shunt cover 5 coaxially distributed with the rotary kiln body 1 is fixedly arranged in the rotary kiln body 1, the shunt cover 5 is conical, the open end of the shunt cover 5 is connected with one side close to the sealing device 7, the open end of the shunt cover 5 is a large end, one end of the feeding pipe 2 extends into the shunt cover 5 and is close to the small end of the shunt cover 5, a mullite raw material in the feeding pipe 2 is conveyed to the small end of the shunt cover 5, the outer wall of the shunt cover 5 is provided with uniformly distributed vent holes 51, and the inner surface wall and the outer surface wall of the shunt cover 5 are both coated with, flame that fuel pipe 3 and air-supply line 4 produced passes through air vent 51 and begins to carry out primary sintering, the tapering of reposition of redundant personnel cover 5 is twice the acute angle that rotary kiln body 1 and horizontal plane formed, and rotary kiln body 1 gyration in-process, the mullite raw materials of primary sintering in the reposition of redundant personnel cover 5 rolls to the one end that is close to sealing device in the rotary kiln body 1 and flows, and the table wall of reposition of redundant personnel cover 5 is close to the oral area and has seted up blanking hole 52 of stepping down, falls into the outside of reposition of redundant personnel cover 5 through blanking hole 52, then rolls to the direction of fuel pipe 3 and air-supply line 4 in rotary kiln body 1 and flows, carries out secondary sintering, then discharges through discharge device 8.
Example 2
The differences from example 1 are: the heat-resistant layer 6 is formed by brushing aqueous slurry inorganic paint, has good heat resistance, can be brushed and is convenient to manufacture.
Example 3
Referring to fig. 2, a mullite calcination process corresponding to a production apparatus for temperature-adjusting calcination of natural sintered mullite in a rotary kiln includes the following steps:
step one, feeding the mixture into the rotary kiln body through an air inlet pipeThe air volume is 5000-3The air supply amount is the same as that of the traditional air supply amount;
step two, delivering gas fuel to the rotary kiln body through a fuel pipe, wherein the gas fuel and the air delivery quantity through an air delivery pipe are 1: the ratio of 6 to 8, the delivery of which is reduced relative to conventional gaseous fuels;
igniting and burning the gas fuel, keeping the temperature in the rotary kiln body at 1800-1900 ℃, and accelerating the fusion speed of the mullite raw material;
step four, starting the rotary kiln body to rotate, wherein the rotating speed is 4.5-6.5r/min, the rotary kiln body rotates under the driving of an external riding wheel, and the rotating speed accelerates the flow of the mullite raw material;
conveying granular raw materials into the shunt cover through the feeding pipe, and performing primary sintering, wherein flame penetrates through a vent hole in the shunt cover to perform primary sintering on the mullite raw materials in the shunt cover;
and seventhly, performing secondary sintering on the primary sintered mullite generated in the sixth step, wherein when the mullite raw material flows into the outside, the flame in the rotary kiln body performs secondary sintering on the primary sintered raw material, so that the sintering efficiency is improved.
Example 4
The difference from the embodiment 3 is that the gas fuel in the step two is natural gas, and the gas fuel in the step two and the air supply quantity through the air supply pipe are 1: 7, reduced input cost of the gaseous fuel.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (6)
1. A production device for temperature-adjusting calcination of a natural sintered mullite rotary kiln comprises a rotary kiln body (1) which is obliquely distributed, one end of the rotary kiln body (1) is provided with a feeding pipe (2) which is connected with the rotary kiln body through a sealing device (7), and the other end of the rotary kiln body is connected with a fuel pipe (3) and an air inlet pipe (4) through a discharging device (8), the production device is characterized in that a shunting cover (5) which is coaxially distributed with the rotary kiln body (1) is fixedly arranged in the rotary kiln body (1), the shunting cover (5) is conical, the opening end of the shunting cover is connected with one side close to the sealing device, one end of the feeding pipe (2) extends into the shunting cover (5) and is close to the small end of the shunting cover (5), the taper of the shunting cover (5) is twice of the acute angle formed by the rotary kiln body (1) and the horizontal plane, and vent holes (51) which are, and a blanking abdicating hole (52) is arranged near the mouth part.
2. The production equipment and the process for the rotary kiln temperature-regulating calcination of the natural sintered mullite according to the claim 1, wherein the inner surface wall and the outer surface wall of the flow dividing cover (5) are coated with heat-resistant layers (6).
3. The production equipment and the process for the rotary kiln temperature-regulating calcination of the natural sintered mullite according to claim 2, wherein the heat-resistant layer (6) is formed by brushing aqueous slurry inorganic paint.
4. The mullite calcination process corresponding to the production equipment for the rotary kiln temperature-regulating calcination of the natural sintered mullite according to claim 1 is characterized by comprising the following steps of:
step one, air is supplied into the rotary kiln body through an air inlet pipe, and the air supply amount is 5000-3/h；
Step two, delivering gas fuel to the rotary kiln body through a fuel pipe, wherein the gas fuel and the air delivery quantity through an air delivery pipe are 1: a ratio of 6 to 8;
igniting and burning the gas fuel, and keeping the temperature in the rotary kiln body at 1800-1900 ℃;
step four, starting the rotary kiln body to rotate at the rotating speed of 4.5-6.5 r/min;
sixthly, conveying granular raw materials into the shunting cover through the feeding pipe, and sintering for the first time;
and seventhly, sintering the primary sintered mullite generated in the sixth step for the second time.
5. The mullite calcination process corresponding to the production equipment for the rotary kiln temperature-regulating calcination of the natural sintered mullite according to claim 4, wherein the gas fuel in the second step is natural gas.
6. The mullite calcination process corresponding to the production equipment for the rotary kiln temperature-regulating calcination of the natural sintered mullite according to claim 5, wherein the air supply volume of the gas fuel and the air supply volume of the air supply pipe in the second step are 1: 7 in the same ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090731.9A CN110655088A (en) | 2019-11-09 | 2019-11-09 | Production equipment and process for temperature-adjusting calcination of natural sintered mullite in rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911090731.9A CN110655088A (en) | 2019-11-09 | 2019-11-09 | Production equipment and process for temperature-adjusting calcination of natural sintered mullite in rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110655088A true CN110655088A (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911090731.9A Withdrawn CN110655088A (en) | 2019-11-09 | 2019-11-09 | Production equipment and process for temperature-adjusting calcination of natural sintered mullite in rotary kiln |
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| CN (1) | CN110655088A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4004876A (en) * | 1974-03-22 | 1977-01-25 | F. L. Smidth & Co. | Method of burning pulverous raw material and rotary kiln plant therefor |
| CN2096565U (en) * | 1991-06-25 | 1992-02-19 | 西安冶金建筑学院 | Rotary kiln pre-decomposition device for cement vertical cylider preheater |
| CN101066863A (en) * | 2006-12-28 | 2007-11-07 | 张世平 | Mullite ceramic baking process and the rotary kiln therefor |
| CN106977118A (en) * | 2017-03-30 | 2017-07-25 | 鞍钢集团朝阳钢铁有限公司 | A kind of method of rotary kiln coal gas of converter lime burning |
| CN107166953A (en) * | 2017-06-05 | 2017-09-15 | 索通发展股份有限公司 | Indirect heating apparatus for volatile fraction in petroleum coke |
| CN211419587U (en) * | 2019-11-09 | 2020-09-04 | 靖州华鑫莫来石有限公司 | Production equipment for temperature-adjusting calcination of natural sintered mullite in rotary kiln |
-
2019
- 2019-11-09 CN CN201911090731.9A patent/CN110655088A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4004876A (en) * | 1974-03-22 | 1977-01-25 | F. L. Smidth & Co. | Method of burning pulverous raw material and rotary kiln plant therefor |
| CN2096565U (en) * | 1991-06-25 | 1992-02-19 | 西安冶金建筑学院 | Rotary kiln pre-decomposition device for cement vertical cylider preheater |
| CN101066863A (en) * | 2006-12-28 | 2007-11-07 | 张世平 | Mullite ceramic baking process and the rotary kiln therefor |
| CN106977118A (en) * | 2017-03-30 | 2017-07-25 | 鞍钢集团朝阳钢铁有限公司 | A kind of method of rotary kiln coal gas of converter lime burning |
| CN107166953A (en) * | 2017-06-05 | 2017-09-15 | 索通发展股份有限公司 | Indirect heating apparatus for volatile fraction in petroleum coke |
| CN211419587U (en) * | 2019-11-09 | 2020-09-04 | 靖州华鑫莫来石有限公司 | Production equipment for temperature-adjusting calcination of natural sintered mullite in rotary kiln |
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Application publication date: 20200107 |
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