CN102010211A - Method for producing alumina mullite homogenizing material - Google Patents
Method for producing alumina mullite homogenizing material Download PDFInfo
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- CN102010211A CN102010211A CN 201010501329 CN201010501329A CN102010211A CN 102010211 A CN102010211 A CN 102010211A CN 201010501329 CN201010501329 CN 201010501329 CN 201010501329 A CN201010501329 A CN 201010501329A CN 102010211 A CN102010211 A CN 102010211A
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- Prior art keywords
- mullite
- alumina
- raw material
- pug
- kaolin
- Prior art date
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Links
- 239000000463 material Substances 0.000 title claims abstract description 41
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 26
- 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 22
- 229910052863 mullite Inorganic materials 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 15
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 12
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 10
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 6
- 238000000227 grinding Methods 0.000 claims abstract description 5
- 239000004927 clay Substances 0.000 claims description 20
- 239000003245 coal Substances 0.000 claims description 19
- 238000000265 homogenisation Methods 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 8
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 8
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical compound C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 5
- 238000013467 fragmentation Methods 0.000 claims description 5
- 238000006062 fragmentation reaction Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 238000001238 wet grinding Methods 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000001694 spray drying Methods 0.000 claims description 2
- 239000011819 refractory material Substances 0.000 abstract description 4
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000009172 bursting Effects 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 11
- 239000004411 aluminium Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000013590 bulk material Substances 0.000 description 2
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 229910021502 aluminium hydroxide Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000003837 high-temperature calcination Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Silicates, Zeolites, And Molecular Sieves (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The invention discloses a method for producing an alumina homogenizing material, which belongs to the technical field of ceramics and refractory materials. The preparation method comprises the following steps of: with middle and low grade bauxite, gangue or kaolin as raw materials, assistantly adding siliceous dust or aluminum oxide powder; and breaking, grinding by a wet method, deironing, atomizing for drying, moulding, burning, and the like to form the alumina mullite homogenizing material with a main crystalline phase of mullite. The invention not only greatly improves the utilization ratio of bauxite resources but also can utilize part of gangue to produce a high-grade refractory raw material and has obvious social and economic benefits; and the preparation method has the characteristics of simple process, easy operation, lower cost, high mouldability, difficult bursting after conveyed into a kiln, and the like.
Description
Technical field
The invention belongs to pottery, technical field of refractory materials, relate to a kind of method of producing alumina mullite homogenization material.
Background technology
It is the precondition of making the quality refractory goods that chemical ingredients and mineral composition keep stable, therefore requires the Al of same grade in the bauxite chamotte
2O
3Within the fluctuation of content is controlled at more among a small circle.Though China's bauxite ore reserves are abundant, but, cause in recent years the low and high alumina resource supply and demand contradiction of resource utilization to manifest because there is small scale mostly in aluminum current alumina processing enterprise, processing is simple, kind is single, product stability is poor, the discarded rate height of mine resources, energy consumption height, phenomenon such as seriously polluted.China has 65% refractory materials to belong to Al approximately
2O
3-SiO
2It is product, therefore, pay attention to the research of refractory raw material, taking technological lines such as homogenizing, purification, when making the lifting of grade, quality generation matter of natural matter, can not only improve the raw material added value, also for the synthetic novel material of a large amount of high-quality of research and development, for the research and development of refractory product are laid a solid foundation.
Be accompanied by application and the outlet of decades to the higher-grade bauxitic clay, present higher-grade alumina is fewer and feweri, therefore, the technology of employing science and advanced equipment, make full use of a large amount of in, low-grade alumine, mix level ore deposit and muck, preparation has the serial alumina mullite homogeneous material (Al of excellent properties
2O
3Content 48%～75%), China's alumine resource utilization is brought up to more than 80% from present 20%, realized Sustainable development, of far-reaching significance.
The alumina mullite homogeneous material is to be basic material with the bauxitic clay, and selectivity is equipped with other material, and through the synthetic material with even composition, structure and performance that high-temperature calcination after certain processing treatment operation makes, its principal crystalline phase is the mullite phase.
At present, in the disclosed patent, utilize alumina to prepare have three of mullite:
Publication number is that the patent of invention of CN98101568.9 is a raw material with alumine, kaolin, clay, silica, aluminum oxide, adopts technologies such as preroasting and wet method leaching, complex process, and the cost height is difficult to realize.
Publication number is that the patent of invention of CN200510040142.1 mainly utilizes kaolin and aluminium hydroxide and aluminum oxide to be raw material, because it requires material grinding to 1～2 μ m, and the cost height, efficient is low, is difficult to satisfy the requirement of industrialized production.
Publication number is that the patent of invention of 200610017448.X is a raw material with alumine, coal gangue, adds rare earth oxide and MgO composite sintering agent, adopts the mixed grinding of wet method or semidrying, and briquetting is dried, burnt till.Rare earth oxide costs an arm and a leg, difficult the acquisition, and can produce certain harm to HUMAN HEALTH and environment.
Summary of the invention
For the production technique of simplifying alumina mullite homogenization material, be convenient to implement, reduce production costs, the present invention proposes in spraying drying and dry-press process base substrate is on the basis of feature, with in low-grade alumina be main raw material, selectivity is equipped with novel process, the novel method that coal gangue or kaolin are produced alumina mullite homogenization material.
Described method is: piece material lists such as bauxitic clay rawore, coal gangue solely are broken into fritter to adapt to follow-up grinding, all materials are by after specific weight percent weighing, being equipped with well, the water and the admixture that add 30-40%, with its wet grinding to the 300-500 order, the pug that obtains enters the ageing mixture pond, utilizing tramp iron separator that pug is carried out deironing handles, utilize spray-drying tower to carry out spraying drying again, obtain dry method straight forming behind the particulate state material, base substrate after the moulding burns till in high temperature kiln, can make alumina mullite homogenization material.
Basically there be not the fragment of particle diameter after the fragmentation of described block of material greater than 10mm.
Described bauxitic clay be in low-grade alumina or muck raw material, Al
2O
3Content is 48%-73%.
The weight percent of described material is:
Main raw material: 60～100% alumine, 0%～40% coal gangue or kaolin;
Auxiliary adding: the silicon ash or the aluminum oxide powder that account for main raw material gross weight 0-4%.
During described wet-milling, the purpose that adds admixture is preferably organic dispersing agent for suppressing powder reuniting, and as polyvinyl alcohol etc., add-on is no more than 0.5%.
After described pug carried out spraying drying, moisture content was less than 4%.
The described direct high pressure of false particulate state powder that utilizes spraying drying to form that is shaped to is pressed into suitable base substrate, in order to burning till.
Described high temperature kiln is best with the tunnel furnace, and firing temperature is 1550-1750 ℃.
Technique scheme of the present invention compared with prior art has the following advantages:
(1) operation is simple, easy handling, and cost is lower;
(2) spraying drying brings up a large amount of false particles, and the venting quality of the moment of false particle when moulding is very good, the slabbing when having avoided moulding, simultaneously, because moisture content is lower, so, through the molding of this operation not drying improved efficient greatly directly into kiln;
(3) avoided the base substrate of existing wet moulding to go into explosion problem in the kiln;
(4) make full use of a large amount of in, low-grade alumine, mix the level ore deposit and muck is starting material, improved the utilization ratio of high bauxite resource, help the optimization utilization and the Sustainable development of mine resources.
(5) coal gangue is the waste material of Coal Production association, and the present invention can utilize the part of coal spoil to produce high-grade refractory materials, has not only improved the utilization ratio and the added value of product of resource, and helps the long-run development of resource and environment.
The following example is used for illustrating the present invention, points out that simultaneously the present invention is not limited to wherein said specific composition, ratio, parameter and technology.
Embodiment
Embodiment 1
With aluminium content is that 48%～60% bauxitic clay rawore and aluminium content are that 33%～38% coal gangue is a raw material, produces alumina mullite homogenization material, and the weight percentage of each raw material is:
Bauxitic clay: 75%, coal gangue 25%;
Aluminum oxide powder: 4% (accounting for the percentage ratio of bauxitic clay and coal gangue gross weight);
Polyvinyl alcohol: 0.2% (accounting for the percentage ratio of bauxitic clay and coal gangue gross weight).
Method with above-mentioned material production alumina mullite homogenization material may further comprise the steps:
(1) the piece material is broken for the fine grained chippings of particle diameter less than 10mm.
(2) fragmentation is good fritter particle, aluminum oxide powder weighing by weight percentage join in the ball mill after preparing, and add the water and the polyvinyl alcohol that account for material gross weight 30-40% simultaneously and grind; Be ground to discharging behind the 300-500 order.
(3) ground pug is got to carried out deironing in the ageing mixture pond, it is 10000-12000 Gauss's wet method magnetic deironing device that magnetic intensity is adopted in deironing.
(4) the wet type pug after the deironing is got to carried out drying in the spray-dryer, dried pug moisture is less than 4%.
(5) utilize the direct high-pressure molding of powder after the spraying drying to be base substrate.
(6) the base substrate sign indicating number is directly pushed in the tunnel furnace on kiln car burn till, firing temperature is controlled at 1550-1650 ℃.
Embodiment 2
With aluminium content is that 60%～73% bauxitic clay rawore and aluminium content are that 33%～38% coal gangue is a raw material, produces alumina mullite homogenization material, and the weight percentage of each raw material is:
Bauxitic clay: 63%, coal gangue 37%;
2.5% active oxidation aluminium powder (accounting for the percentage ratio of bauxitic clay and coal gangue gross weight);
Polyvinyl alcohol: 0.2% (accounting for the percentage ratio of bauxitic clay and coal gangue gross weight).
Method with above-mentioned material production alumina mullite homogenization material may further comprise the steps:
(1) the bulk material is broken for the fine grained chippings of particle diameter less than 10mm.
(2) fritter bauxitic clay that fragmentation is good, coal gangue and the weighing by weight percentage of active oxidation aluminium powder join in the ball mill after being equipped with, and add the water and the polyvinyl alcohol that account for material gross weight 30-40% simultaneously and grind; Be ground to discharging behind the 300-500 order.
(3) ground pug is got to carried out deironing in the ageing mixture pond, it is 10000-12000 Gauss's wet method magnetic deironing device that magnetic intensity is adopted in deironing.
(4) the wet type pug after the deironing is got to carried out drying in the spray-dryer, dried pug moisture is less than 4%.
(5) utilize the direct high-pressure molding of powder after the spraying drying to be base substrate.
(6) the base substrate sign indicating number is directly pushed in the tunnel furnace on kiln car burn till, firing temperature is controlled at 1600-1700 ℃.
Embodiment 3
With aluminium content is that 60%～73% bauxitic clay rawore and aluminium content are that 35%～37% kaolin is raw material, produces alumina mullite homogenization material, and the weight percentage of each raw material is:
Bauxitic clay: 72%, coal gangue 28%;
3% active oxidation aluminium powder (accounting for the percentage ratio of bauxitic clay and kaolin gross weight);
0.5% silicon ash (accounting for the percentage ratio of bauxitic clay and kaolin gross weight);
Polyvinyl alcohol: 0.2% (accounting for the percentage ratio of bauxitic clay and kaolin gross weight).
Method with above-mentioned material production alumina mullite homogenization material may further comprise the steps:
(1) the bulk material is broken for the fine grained chippings of piece footpath less than 10mm.
(2) fragmentation is good fine grained chippings material, kaolin, the weighing by weight percentage of active oxidation aluminium powder join in the ball mill after preparing, and add the water and the polyvinyl alcohol that account for material gross weight 30-40% simultaneously and grind; Be ground to discharging behind the 300-500 order.
(3) ground pug is got to carried out deironing in the ageing mixture pond, it is 10000-12000 Gauss's wet method magnetic deironing device that magnetic intensity is adopted in deironing.
(4) the wet type pug after the deironing is got to carried out drying in the spray-dryer, dried pug moisture is less than 4%.
(5) utilize the direct high-pressure molding of powder after the spraying drying to be base substrate.
(6) the base substrate sign indicating number is directly pushed in the tunnel furnace on kiln car burn till, firing temperature is controlled at 1650-1750 ℃.
Claims (7)
1. method of producing alumina mullite homogenization material: low-grade bauxite in main the utilization, be equipped with coal gangue or kaolin is made raw material, auxiliary interpolation silicon ash or aluminum oxide powder carry out the production of alumina mullite homogenization material, processing step is characterised in that: piece material list wherein solely is broken into the fritter particle to adapt to follow-up grinding, all materials are by specific weight percent weighing, after being equipped with well, the water and the admixture that add 30-40%, with its wet grinding to the 300-500 order, the pug that obtains enters the ageing mixture pond, utilizing tramp iron separator that pug is carried out deironing handles, utilize spray-drying tower to carry out spraying drying again, obtain dry method straight forming behind the particulate state material, base substrate after the moulding burns till in high temperature kiln, and can make principal crystalline phase is the alumina mullite homogenization material of mullite.
2. according to claim 1, the weight percentage of described material is:
Main raw material: 60～100% alumine, 0%～40% coal gangue or kaolin;
Auxiliary adding: the silicon ash or the aluminum oxide powder that account for main raw material gross weight 0-4%.
3. according to claim 1, after the fragmentation of described block of material, there be not the fritter particle of particle diameter basically greater than 10mm.
4. according to claim 1, described bauxitic clay be in low-grade alumina or muck raw material, Al
2O
3Content is 48%-73%.
5. according to claim 1, add admixture during described wet grinding and be preferably organic dispersing agent, as polyvinyl alcohol etc., add-on must not surpass 0.5%.
6. according to claim 1, after described pug carried out spraying drying, moisture content was less than 4%.
7. according to claim 1, described high temperature kiln is tunnel furnace preferably, and firing temperature is 1550-1750 ℃.
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| CN 201010501329 CN102010211B (en) | 2010-10-11 | 2010-10-11 | Method for producing alumina mullite homogenizing material |
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| CN 201010501329 CN102010211B (en) | 2010-10-11 | 2010-10-11 | Method for producing alumina mullite homogenizing material |
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| CN102010211B CN102010211B (en) | 2013-04-17 |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103159488A (en) * | 2012-12-31 | 2013-06-19 | 北京欣瑞天成节能工程技术有限公司 | Granularity homogenization method of refractory aggregate of various size fractions |
| CN103272679A (en) * | 2013-05-14 | 2013-09-04 | 北京欣瑞天成节能工程技术有限公司 | Method for contouring refractory aggregate |
| CN103496708A (en) * | 2013-09-24 | 2014-01-08 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN103819211A (en) * | 2014-01-07 | 2014-05-28 | 邹平耀华特耐科技有限公司 | Light wear-proof and fire-proof plastic mass for circulating fluidized bed boiler and preparation method of light wear-proof and fire-proof plastic mass |
| CN106242538A (en) * | 2016-08-30 | 2016-12-21 | 长兴云峰炉料有限公司 | A kind of novel homogeneous material stemming |
| CN108191436A (en) * | 2018-01-16 | 2018-06-22 | 宫营方 | A kind of method for preparing refractory grade bauxite using bauxite rawore powder |
| CN108373319A (en) * | 2018-01-16 | 2018-08-07 | 宫营方 | A method of preparing abrasive material grade bauxite using bauxite rawore powder |
| CN109265185A (en) * | 2018-10-30 | 2019-01-25 | 浙江锦诚新材料股份有限公司 | A kind of Special castable for kiln outlet |
| CN109970434A (en) * | 2019-04-17 | 2019-07-05 | 郑州市新郑梅久实业有限公司 | A kind of ceramsite sand and its production technology |
| CN111153705A (en) * | 2019-12-31 | 2020-05-15 | 内蒙古超牌建材科技有限公司 | Method for manufacturing M47 refractory material by using coal gangue |
| CN111423221A (en) * | 2020-03-16 | 2020-07-17 | 宝武装备智能科技有限公司 | Castable for rotary hearth furnace working layer and preparation method thereof |
| CN113912414A (en) * | 2021-10-28 | 2022-01-11 | 韶关学院 | Method for preparing mullite porous heat-insulating material by using coal gangue |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103159488A (en) * | 2012-12-31 | 2013-06-19 | 北京欣瑞天成节能工程技术有限公司 | Granularity homogenization method of refractory aggregate of various size fractions |
| CN103272679A (en) * | 2013-05-14 | 2013-09-04 | 北京欣瑞天成节能工程技术有限公司 | Method for contouring refractory aggregate |
| CN103496708A (en) * | 2013-09-24 | 2014-01-08 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN103496708B (en) * | 2013-09-24 | 2015-03-04 | 武汉科技大学 | Raw material for synthesizing mullite and preparation method thereof |
| CN103819211A (en) * | 2014-01-07 | 2014-05-28 | 邹平耀华特耐科技有限公司 | Light wear-proof and fire-proof plastic mass for circulating fluidized bed boiler and preparation method of light wear-proof and fire-proof plastic mass |
| CN103819211B (en) * | 2014-01-07 | 2017-06-27 | 山东耀华特耐科技有限公司 | CFBB lightweight wear-resistant plastic refractory and preparation method thereof |
| CN106242538A (en) * | 2016-08-30 | 2016-12-21 | 长兴云峰炉料有限公司 | A kind of novel homogeneous material stemming |
| CN108373319A (en) * | 2018-01-16 | 2018-08-07 | 宫营方 | A method of preparing abrasive material grade bauxite using bauxite rawore powder |
| CN108191436A (en) * | 2018-01-16 | 2018-06-22 | 宫营方 | A kind of method for preparing refractory grade bauxite using bauxite rawore powder |
| CN109265185A (en) * | 2018-10-30 | 2019-01-25 | 浙江锦诚新材料股份有限公司 | A kind of Special castable for kiln outlet |
| CN109970434A (en) * | 2019-04-17 | 2019-07-05 | 郑州市新郑梅久实业有限公司 | A kind of ceramsite sand and its production technology |
| CN109970434B (en) * | 2019-04-17 | 2021-09-24 | 郑州市新郑梅久实业有限公司 | Ceramsite sand and production process thereof |
| CN111153705A (en) * | 2019-12-31 | 2020-05-15 | 内蒙古超牌建材科技有限公司 | Method for manufacturing M47 refractory material by using coal gangue |
| CN111153705B (en) * | 2019-12-31 | 2022-04-19 | 内蒙古超牌新材料股份有限公司 | Method for manufacturing M47 refractory material by using coal gangue |
| CN111423221A (en) * | 2020-03-16 | 2020-07-17 | 宝武装备智能科技有限公司 | Castable for rotary hearth furnace working layer and preparation method thereof |
| CN111423221B (en) * | 2020-03-16 | 2022-10-21 | 宝武装备智能科技有限公司 | Castable for rotary hearth furnace working layer and preparation method thereof |
| CN113912414A (en) * | 2021-10-28 | 2022-01-11 | 韶关学院 | Method for preparing mullite porous heat-insulating material by using coal gangue |
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Address after: 030100 Yangqu County, Shanxi province finance street, No., No. 5 Patentee after: Shanxi Gaoke Refractory Material Co.,Ltd. Address before: 030006 No. 280, Changzhi Road, hi tech Zone, Shanxi, Taiyuan Patentee before: Shanxi Gaoke Refractory Material Co.,Ltd. |
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