CN111377469A - White corundum production process and production equipment - Google Patents
White corundum production process and production equipment Download PDFInfo
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- CN111377469A CN111377469A CN201811619062.5A CN201811619062A CN111377469A CN 111377469 A CN111377469 A CN 111377469A CN 201811619062 A CN201811619062 A CN 201811619062A CN 111377469 A CN111377469 A CN 111377469A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
- C01F7/027—Treatment involving fusion or vaporisation
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
- C01F7/022—Classification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
- C01F7/023—Grinding, deagglomeration or disintegration
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Abstract
The invention provides a white corundum production process, which comprises the following steps: firstly, feeding and smelting, namely, sending industrial alumina powder into an electric arc furnace for smelting; secondly, sorting and crushing, namely guiding out large blocks of frits, smashing the frits by a heavy hammer, and sending the frits to a crushing device for primary crushing; thirdly, screening, namely screening according to the granularity of the materials, and crushing the materials with the granularity larger than 25 mm; and fourthly, grinding, namely sending the crushed material to a ball mill for grinding, and grading according to the particle size of the final material. Compared with the prior art, the white corundum production process and the white corundum production equipment provided by the invention not only solve the problem of serious environmental pollution caused by waste acid, waste alkali and industrial wastewater and improve the product quality, but also avoid raw material waste and improve the raw material utilization rate through a multistage crushing process, and obtain white corundum particles with uniform particle size distribution.
Description
Technical Field
The invention relates to the field of white corundum production, and particularly relates to a white corundum production process and production equipment.
Background
The white corundum is prepared by taking high-quality aluminum oxide powder as a raw material and carrying out electric smelting, has the characteristics of pure white color, high hardness, high purity, excellent self-sharpening property, strong grinding force, acid and alkali corrosion resistance, high temperature resistance, good thermal stability and the like, belongs to a trigonal system, and has a unit crystal of a rhombohedral body with the volume density of 3.60g/cm3The Mohs hardness is 10.0, and the chemical property shows amphipathy. The white corundum is not only a high-grade abrasive grinding tool material, but also a high-grade grinding and polishing material, and the like, and the grinding tool processed by the white corundum is suitable for grinding high-carbon steel, high-speed steel and various stainless steels. The white corundum is also widely applied to special ceramics such as precision casting, steel fire resistance, chemical fire resistance, 95 electroceramics, decorative ceramics and the like, daily-life ceramics, military industry, electronics and other high-tech lines. The traditional white corundum particle material preparation production line mainly adopts the following working procedures: crushing → segmentation (control sieve) → acid and alkali washing, water washing → drying → magnetic separation → fine sieve, etc. The traditional production process has the defects of serious environmental pollution caused by waste acid, waste alkali, dust and industrial wastewater, high labor intensity, poor production environment, low product cleanliness, high production cost, large floor area, incapability of continuously performing all production procedures and the like. In the control of various devices of the whole line, single machine control is mostly adopted, the automation degree is quite low, the linkage of various devices cannot be realized, and the automation degree of the whole production line is limited.
The patent with application number 201120342681.1 in the prior art discloses a dry-method continuous full-automatic production line for preparing white corundum granular materials, which comprises a crushing device, a sorting device, a cleaning device, a magnetic separation device, a screening device, an automatic packaging system, a material conveying mechanism connected among the devices and an electrical control and monitoring system which are sequentially arranged. The utility model is characterized in that: the separation device and the dry cleaning device are used in a matched manner, so that the traditional acid-base washing, water washing and drying processes are replaced, although the problem of serious pollution of waste acid, waste alkali and industrial wastewater to the environment is solved, the product quality is improved, the cleanliness of the white corundum granular material is more than 98 percent (the cleanliness of the traditional process production line is generally less than 96 percent after multiple times of water washing), and the continuous industrial production is realized; but the crushing process is single in the actual production process, and the waste of raw materials is easily caused.
Disclosure of Invention
In view of the above, the present invention is directed to a white corundum production process and a white corundum production apparatus, so as to solve the above problems.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a white corundum production process comprises the following steps:
firstly, feeding and smelting, namely, sending industrial alumina powder into an electric arc furnace for smelting;
secondly, selecting and crushing, namely smashing the large frits poured out of the receiving bag by using a heavy hammer, and then sending the large frits to a crushing device for primary crushing;
thirdly, screening, namely screening according to the granularity of the materials, and crushing the materials with the granularity larger than 25 mm;
and fourthly, grinding, namely sending the crushed material to a ball mill for grinding, and grading according to the particle size of the final material.
Further, the feeding and smelting comprises the steps of feeding the industrial alumina powder to a stokehold bin through feeding, then feeding the industrial alumina powder to a dumping type melting arc furnace for high-temperature smelting, pouring the molten liquid into a ladle car, conveying the molten liquid to a cooling area, and cooling to form a blocky material.
Further, the sorting and crushing include pouring out large blocks of frits from the receiving bag, smashing the frits into white corundum blocks with the particle size of less than 300mm by using a heavy hammer, and then sending the white corundum blocks to a jaw crusher for primary crushing to obtain materials with the particle size of less than 80mm and lifting the materials to a storage bin.
Further, the screening comprises the step of carrying out secondary crushing on the materials with the granularity smaller than 80mm, lifting the materials after the secondary crushing to a screening platform for screening, enabling the materials with the granularity smaller than 25mm to flow into a storage bin, and enabling the materials with the granularity larger than 25mm to return to the jaw crusher for secondary crushing and then enter a screening link again.
Further, the materials after secondary crushing are sent to a vertical impact crusher for third crushing, the crushed materials are lifted to a screening platform for screening, the materials with the thickness less than or equal to 3mm and the thickness between 3 and 10mm respectively flow into a designated bin, the materials with the thickness more than 10mm directly return to the vertical crusher for crushing again, and the materials with the thickness less than or equal to the thickness of the materials directly return to the bin after vertical crushing.
Further, the grinding comprises the steps of conveying the material with the granularity of 0-1 to a ball mill for grinding, grading by a grading system to obtain fine powder with the granularity of less than 220 meshes or the granularity of less than 350 meshes, lifting the fine powder to a finished product bin, and returning the material with the granularity of more than 220 meshes or the material with the granularity of more than 350 meshes to the ball mill for grinding again.
Further, the crushing comprises primary crushing and secondary crushing, wherein the primary crushing is used for crushing white corundum blocks with the granularity of less than 350mm into materials with the granularity of less than 80mm, and the secondary crushing is used for crushing the materials with the granularity of less than 80mm again.
The invention also provides white corundum production equipment, which adopts the white corundum production process and comprises an electric arc furnace, a crushing device, a lifting device and an iron removal device.
Further, breaker includes broken subassembly of first broken subassembly, second, the broken subassembly of third and double-roll crusher, and the broken subassembly of first broken subassembly and second sets up to jaw crusher, and the broken subassembly of third sets up to vertical crusher.
Furthermore, the lifting device is set to be a plurality of bucket elevators, the position of each bucket elevator is determined according to the requirement, the iron removal device is set to be a plurality of magnetic separators, and the magnetic separators are used for removing the iron content in the crushed materials.
Compared with the prior art, the white corundum production process and the production equipment have the following advantages:
(1) the white corundum production process not only solves the problem of serious pollution of waste acid, waste alkali and industrial wastewater to the environment and improves the product quality, but also avoids raw material waste, improves the raw material utilization rate and obtains white corundum particles with uniform particle size distribution through a multi-stage crushing process.
(2) The white corundum production equipment disclosed by the invention is simple in structure and convenient to control, ensures that the production process is smoothly carried out, enables the equipment to stably keep stable operation, is convenient for operators to maintain, and reduces the failure probability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a white corundum production process according to an embodiment of the invention;
FIG. 2 is a schematic connection diagram of a white corundum production device according to an embodiment of the present invention.
Description of reference numerals:
1-a first jaw crusher, 2-a first bucket elevator, 3-a second jaw crusher, 4-a third jaw crusher, 5-a second bucket elevator, 6-a third bucket elevator, 7-a double-roller crusher, 8-a vertical crusher, 9-a fourth bucket elevator, 10-a screening component, 11-a fifth bucket elevator, 12-a sixth bucket elevator, 13-a first magnetic separator, 14-a second magnetic separator
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. But must be based on the realization that a person skilled in the art will be able to realise that, when a combination of technical solutions appears contradictory or cannot be realised, such a combination should not be considered to be present and not be within the scope of the invention as claimed.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
The embodiment provides a white corundum production process, which comprises the following steps of feeding, smelting, selecting, crushing, screening and grinding:
(1) feeding and smelting: industrial alumina powder is fed into a stokehold bin through feeding, then is fed into a dumping type melting arc furnace for high-temperature smelting, and then molten liquid is poured into a ladle car and conveyed to a cooling area for cooling to form a blocky material.
(2) Sorting and crushing: pouring out the large blocks of fusion cakes from the connected bags, and smashing the large blocks of fusion cakes into white corundum blocks with the diameter of less than 300mm by using a heavy hammer. Then the materials are sent to a jaw crusher for primary crushing, and the materials with the granularity less than 80mm are obtained and lifted to a storage bin.
(3) Screening: and (3) performing secondary crushing on the material with the granularity smaller than 80mm, lifting the material after the secondary crushing to a screening platform for screening, enabling the material with the granularity smaller than 25mm to flow into a storage bin, and enabling the material with the granularity larger than 25mm to return to the jaw crusher for secondary crushing and then enter a screening link again.
And (3) conveying the materials after secondary crushing into a vertical impact crusher for third crushing, lifting the materials after crushing to a screening platform for screening, respectively flowing the materials less than or equal to 3mm and 3-10mm into a designated bin, directly returning the materials with the higher requirement on the stacking density to the vertical crusher for crushing again in the materials with the higher requirement on the stacking density than 10mm, and directly lifting the materials with the lower requirement on the stacking density into the bin after vertical crushing.
And (3) lifting the materials with different granularities to a magnetic separator for deironing, screening again to obtain segment sands with different granularities, such as 0-1, 1-3, 3-5, 5-10 and the like, respectively, and then entering a specified finished product bin for packaging.
Grinding: and (3) feeding the material with the small granularity of 0-1 into a ball mill for milling, classifying by a classification system to obtain fine powder with the granularity of less than 220 meshes or the granularity of less than 350 meshes, lifting the fine powder to a finished product bin, and returning the material with the granularity of more than 220 meshes or the material with the granularity of more than 350 meshes to the ball mill for re-milling.
Preferably, the fine powder with the granularity of less than 200 meshes or the fine powder with the granularity of less than 325 meshes is lifted to a finished product bin, and the material with the granularity of more than 200 meshes or the material with the granularity of more than 325 meshes is returned to the ball mill for re-grinding.
The white corundum crushing production process provided by the embodiment not only solves the problem of serious pollution of waste acid, waste alkali and industrial wastewater to the environment and improves the product quality, but also avoids raw material waste through a multi-stage crushing process.
Example 2
Further, in this embodiment, on the basis of the above embodiment, the white corundum production process is further defined. The method comprises the following specific steps:
(1) feeding: and (3) conveying the industrial alumina powder to a stokehole bin through feeding.
(2) Smelting: and (3) conveying the raw materials in the stokehole bin into a dump type melting electric arc furnace for high-temperature melting, wherein the power of the melting electric arc furnace is 3600KVA, and conveying the raw materials after high-temperature melting to a cooling area by using a ladle car for cooling to form blocky materials.
(3) And (3) sorting and crushing, namely pouring out the large frits from the ladle receiving vehicle, smashing the large frits into white corundum blocks smaller than 300mm by using a heavy hammer, and then sending the white corundum blocks smaller than 350mm to a first crushing assembly for primary crushing to obtain materials with the granularity smaller than 80mm, wherein the first crushing assembly is a first jaw crusher with the model number of 400 × 600, and the feeding speed of the first jaw crusher is 30-40 t/h, preferably 35 t/h.
(4) Secondary crushing: and lifting the material with the granularity less than 80mm to a first bin by using a first bucket elevator, and then feeding the material into a second crushing component for secondary crushing, wherein the material lifting speed of the first bucket elevator is 35t/h, and the maximum capacity of the first bin is 60 t.
Furthermore, in order to relieve the working pressure of the second crushing assembly and improve the crushing efficiency, the second crushing assembly of the embodiment is provided with two parallel jaw crushers, the model is 150 × 750, the discharging speed is 20t/h, the discharged particle size is less than 30mm, and the outlet of each jaw crusher is connected with a second bucket elevator.
And further, the materials which are subjected to secondary crushing and have the particle size of less than 35mm enter a screening step through a second bucket elevator to be subjected to primary screening.
(5) Primary screening: the materials which are subjected to secondary crushing and have the particle size smaller than 35mm pass through the first screening component, after screening, the materials with the particle size larger than 25mm return to the second crushing component to be crushed again and then enter the screening link again, the materials with the particle size smaller than 25mm enter the second storage bin, and then the next-level crushing and screening link is performed.
Wherein, first screening subassembly sets up to two parallel ore sieves, and the model is 1.2 × 2.4.4 m, and ejection of compact speed is 20t/h, and the material that the particle size is less than 25mm after the screening gets into the second feed bin, and the maximum capacity of second feed bin is 50 t.
(6) And (3) crushing for the third time: and adding the material in the second bin into a third crushing assembly for carrying out tertiary crushing. The method comprises the following specific steps:
deironing in passing through the belt conveying with the material in the second feed bin to the deironing machine that hangs, and the exit velocity of deironing machine is 30t/h, lets in the material to the broken subassembly of third, and this embodiment sets up the broken subassembly of third into vertical crusher, and the model is 700, and exit velocity is 30t/h, and the material particle diameter after vertical crusher is for being less than 10mm, and the material after the breakage enters into the third feed bin through third bucket elevator. Wherein the maximum capacity of the third silo is 50 t.
(7) And (2) secondary screening, namely conveying the materials in the third bin to a second screening component through a first electromagnetic vibration feeder and a bucket elevator, and screening again to obtain section sands with different granularities of 0-3, 3-10, 10-25 and the like, wherein the model of the second screening component is 1.2 × 4m, the discharging speed is 14t/h, the materials with the particle size of less than 10mm after being screened by the second screening component enter the next step, the materials with the particle size of more than 10mm and less than 25mm enter a double-roller crusher for crushing, the materials with high requirement on the accumulation degree return to the vertical crusher through the bucket elevator after passing through the double-roller crusher for crushing again, and the materials with low requirement on the accumulation degree directly enter the third bin through a fourth bucket elevator.
Further, the materials with the particle size of less than 10mm after being screened by the second screening component enter different bins in batches, specifically, the materials with the particle size of less than 3mm enter a fourth bin, the materials with the particle size of 3-10mm enter a fifth bin, and a small part of the materials with the particle size of 10-25mm enter a sixth bin through a deironing machine and a single-roller crusher for storage.
(8) Grinding: the materials in the fourth bin and the fifth bin enter a fifth bucket elevator 11 and a sixth bucket elevator 12 respectively through a second electromagnetic vibration feeder and a third electromagnetic vibration feeder, and then enter a double-roller crusher and a magnetic separator, further crushing, grinding and iron removal operations are carried out on the materials, the materials discharged from the two double-roller crushers pass through two different screening devices respectively, small-particle-size material particles with different particle sizes are further screened out, and the materials enter different finished product bins to be packaged after being subjected to iron removal and classification operations through the further magnetic separator and a classification system.
Wherein, the materials with larger grain diameter after multi-stage screening and crushing can be collected and recycled, or returned to the ball mill for re-grinding.
Preferably, the material particle size grades can be divided into: 0 to 0.2mm, 0.2 to 0.5mm, 0.5 to 1.0mm or 0 to 0.5mm, 0.5 to 1.0mm and the like.
The white corundum crushing production process provided by the embodiment further limits specific crushing routes and parameters of white corundum, improves the utilization rate of raw materials, and obtains white corundum particles with uniform particle size distribution.
Example 3
As shown in fig. 2, the present embodiment further provides a white corundum production apparatus, which specifically includes an electric arc furnace (not shown in the figure), a crushing device, a lifting device, and an iron removing device, wherein the electric arc furnace is used for melting the industrial alumina powder, and further cooling the molten industrial alumina powder into a block shape.
Further, breaker includes first broken subassembly, the broken subassembly of second, broken subassembly of third and double-roll crusher, first broken subassembly and the broken subassembly of second set up to jaw crusher, and jaw crusher's quantity sets up to 3 at least, the broken subassembly of third sets up to vertical crusher, hoisting device sets up to a plurality of bucket elevator, and every bucket elevator's position sets up as required, specific hoisting device includes first bucket elevator, second bucket elevator, third bucket elevator and fourth bucket elevator.
Furthermore, the iron removal device is provided with a plurality of magnetic separators, and the number of the magnetic separators is set according to the requirement and is used for removing the iron content in the crushed material.
Specifically, a first jaw crusher 1 is connected to the tail end of the electric arc furnace and is used for carrying out primary crushing on the blocky materials; furthermore, the other end of the first jaw crusher 1 is connected with a first bucket elevator 2, one end of the first bucket elevator 2 far away from the first jaw crusher 1 is connected with a second jaw crusher 3 and a third jaw crusher 4 which are parallel to each other, the first bucket elevator 2 lifts the material discharged from the first jaw crusher 1 to the second jaw crusher 3 and the third jaw crusher 4 which are parallel to each other, and the second jaw crusher 3 and the third jaw crusher 4 are used for performing secondary crushing on the material. A second bucket elevator 5 and a third bucket elevator 6 are respectively connected at the tail ends of the second jaw crusher 3 and the third jaw crusher 4, the second bucket elevator 5 and the third bucket elevator 6 are respectively used for lifting the materials discharged by the second jaw crusher 3 and the third jaw crusher 4 to a screening component 10 for screening
Further, the material part after being screened by the screening component enters a double-roller crusher 7 for re-crushing, the material with high requirement on the accumulation degree returns to a vertical crusher 8, and the material with low requirement on the accumulation degree directly enters a fourth bucket elevator 9.
Further, a fourth bucket elevator 9 is connected to the vertical crusher 8, and the fourth bucket elevator 9 is used for elevating the materials discharged from the vertical crusher 8 and the double-roll crusher 7 to the third bin.
Further, a fifth bucket elevator 11 and a sixth bucket elevator 12 are connected to one side of the third bunker far away from the vertical crusher 8, and are used for lifting the materials to a deironing device of the next step.
Furthermore, the deironing device is provided with a plurality of magnetic separators, and specifically comprises a first magnetic separator 13 and a second magnetic separator 14 which are arranged in parallel, wherein the first magnetic separator 13 and the second magnetic separator 14 are used for removing the iron content in the crushed material, so that the quality of the white corundum product is improved.
The white corundum production equipment that this embodiment provided, simple structure, the control of being convenient for guarantees that production process goes on smoothly for equipment stability keeps steady operation, makes things convenient for operating personnel to maintain, reduces the trouble probability simultaneously.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A white corundum production process is characterized by comprising the following steps:
firstly, feeding and smelting, namely, sending industrial alumina powder into an electric arc furnace for smelting;
secondly, selecting and crushing, namely smashing the large frits poured out of the receiving bag by using a heavy hammer, and then sending the large frits to a crushing device for primary crushing;
thirdly, screening, namely screening according to the granularity of the materials, and crushing the materials with the granularity larger than 25 mm;
and fourthly, grinding, namely sending the crushed material to a ball mill for grinding, and grading according to the required particle size of the final material.
2. The white corundum production process according to claim 1, characterized in that the feeding and smelting comprises the steps of conveying industrial alumina powder to a stokehold bin through a feeding system, then conveying the industrial alumina powder to a dumping type melting electric arc furnace for high-temperature smelting, pouring the molten liquid into a ladle car, conveying the molten liquid to a cooling area, and cooling to form a block-shaped material.
3. The white corundum production process according to claim 1, characterized in that the sorting and crushing comprises pouring out large blocks of clinker from a receiving bag, smashing the clinker into white corundum blocks with a weight hammer with a size of less than 300mm, then sending the white corundum blocks to a jaw crusher for primary crushing to obtain materials with a particle size of less than 80mm, and lifting the materials to a storage bin.
4. The white corundum production process according to claim 1, characterized in that the screening comprises the steps of carrying out secondary crushing on the materials with the granularity of less than 80mm, lifting the materials after the secondary crushing to a screening platform for screening, enabling the materials with the granularity of less than 25mm to flow into a storage bin, and enabling the materials with the granularity of more than 25mm to return to a jaw crusher for secondary crushing and then to enter a screening link again.
5. The white corundum production process according to claim 4, characterized in that the materials after the secondary crushing are sent to a vertical impact crusher for the third crushing, the crushed materials are lifted to a screening platform for screening, the materials with the thickness of less than or equal to 3mm and the thickness of 3-10mm respectively flow into a designated bin, the materials with the thickness of more than 10mm directly return to the vertical crusher for crushing again, and the materials with the thickness of less than or equal to the thickness of 10mm are directly lifted to the bin behind the vertical crusher.
6. The white corundum production process according to claim 1, characterized in that the grinding comprises conveying the materials with the granularity of 0-1 to a ball mill for grinding, then classifying the materials by a classification system to obtain fine powder with the granularity of less than 220 meshes or the granularity of less than 350 meshes, lifting the fine powder to a finished product bin, and returning the materials with the granularity of more than 220 meshes or the granularity of more than 350 meshes to the ball mill for grinding again.
7. A white corundum producing process according to claim 1 or 3, characterized in that crushing includes primary crushing for crushing white corundum blocks with a grain size of less than 350mm to a material with a grain size of less than 80mm and secondary crushing for crushing again a material with a grain size of less than 80 mm.
8. A white corundum production device, which is characterized in that the white corundum production process of any one of claims 1 to 7 is adopted, and the production device comprises an electric arc furnace, a crushing device, a lifting device and an iron removal device.
9. The white corundum producing device according to claim 8, characterized in that the crushing device comprises a first crushing component, a second crushing component, a third crushing component and a double-roller crusher, wherein the first crushing component and the second crushing component are arranged as jaw crushers, and the third crushing component is arranged as a vertical crusher.
10. The white corundum production device according to claim 8, characterized in that the lifting device is provided with a plurality of bucket elevators, each bucket elevator is positioned as required, the deironing device is provided with a plurality of magnetic separators, and the magnetic separators are used for removing iron content in the crushed materials.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112592162A (en) * | 2020-12-15 | 2021-04-02 | 洛阳利尔功能材料有限公司 | Production process of electric melting white corundum |
| CN113680500A (en) * | 2021-08-23 | 2021-11-23 | 山东锐石研磨材料有限公司 | Preparation process of non-metal abrasive |
| CN115259193A (en) * | 2022-06-27 | 2022-11-01 | 荥阳龙升磨料有限公司 | White corundum production process and production equipment |
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| CN103570358A (en) * | 2012-07-19 | 2014-02-12 | 河南玖鼎新材料股份有限公司 | Lightweight white corundum preparation process |
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| CN102139904A (en) * | 2010-01-29 | 2011-08-03 | 上海凡奋耐火材料有限公司 | Production process for extracting white corundum and sub-white-corundum by utilizing whole castables of waste steel scrap |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112592162A (en) * | 2020-12-15 | 2021-04-02 | 洛阳利尔功能材料有限公司 | Production process of electric melting white corundum |
| CN113680500A (en) * | 2021-08-23 | 2021-11-23 | 山东锐石研磨材料有限公司 | Preparation process of non-metal abrasive |
| CN115259193A (en) * | 2022-06-27 | 2022-11-01 | 荥阳龙升磨料有限公司 | White corundum production process and production equipment |
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Application publication date: 20200707 |