CN101723651A - Black corundum smelted by using waste materials and process for smelting black corundum by using waste materials - Google Patents
Black corundum smelted by using waste materials and process for smelting black corundum by using waste materials Download PDFInfo
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- CN101723651A CN101723651A CN200810230598A CN200810230598A CN101723651A CN 101723651 A CN101723651 A CN 101723651A CN 200810230598 A CN200810230598 A CN 200810230598A CN 200810230598 A CN200810230598 A CN 200810230598A CN 101723651 A CN101723651 A CN 101723651A
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Abstract
The invention provides a black corundum smelted by using leftovers and waste materials and a process for smelting the corundum by using the waste materials. The black corundum is smelted from the following raw materials in percentage by weight: 60 to 70 percent of bauxite leftovers and 30 to 40 percent of iron and aluminium ore. A tilting furnace is used for smelting; the temperature is controlled to be between 1,800 DEG C and 2,050 DEG C, and the time is 10 to 14h. According to the technical scheme, the temperature in the furnace can reach 2,050 DEG C; in a smelting and tilting process of the tilting furnace, a melt is completely melted down and is quickly cooled; and a corundum crystal is microcrystallized, wherein the size of the crystal is controlled to be between 30 mu m and 150 mu m so that the flexibility of the black corundum is increased. The smelted black corundum has stable intrinsic quality; the cost is reduced; and waste materials are fully used. After a chromic oxide is added, the abrasive resistance of the product is improved.
Description
Technical field
The invention belongs to a kind of high-abrasive material, relate in particular to black corundum and smelting technology thereof.
Background technology
Rise along with bauxitic clay and ferric oxide price, the industry feels that gradually the pressure of cost is increasing, and blocky content is also petered out at 70～80% aluminium stone, finds no market and smelt the used tankage major part of brown corundum in the past, and major part is all filled out in the ditch discarded.We are by chemical examination, and the aluminium content of recognizing these raw materials is also all between 70～75%.In addition, the people is arranged around we find when the exploitation iron ore, the ore that some iron-holder and aluminum content are all not too high also goes out of use or has thrown away.The waste of resource and the raising of cost have been caused.What use in producing at present is stationary furnace, and stationary furnace is a proven technique, and the producer of domestic production black corundum uses stationary furnace, but stationary furnace has the shortcoming of the following aspects when smelting black corundum: temperature is low in the stove; Crystal is big during melting crystal; The starting the arc is frequent; After stationary furnace whenever is smelt a stove, finished product in the stove, waste material, and body of heater itself all need use water cooling, then a large amount of electric energy has been wasted in fragmentation again; Labour intensity is big.
Summary of the invention
The purpose of this invention is to provide a kind of black corundum and smelting technology thereof that utilizes tankage and waste material to smelt.
The present invention by the following technical solutions in order to achieve the above object: raw material adds in following ratio to be smelted: bauxitic clay tankage 60～70%, iron aluminum ore 30～40%.
Preferably add 0.3～0.5% chromium sesquioxide again.
The black corundum and the technology smelting technology thereof that utilize waste material to smelt are:
A. carry out fragmentation after raw material being mixed in proportion;
B. add then and topple over stove and smelt, controlled temperature is 1800 ℃～2050 ℃, and the time is 10～14 hours;
C. be poured directly into water jacket after the smelting fusing and connect bag, cool off;
D. cooled material is poured out and carried out fragmentation, obtain the black corundum product, pack.
During smelting, controlled temperature is 2000 ℃, and the time is 4 hours; Be 12 hours cooling time.Adopted above technical scheme, temperature can reach 2050 ℃ in the stove, topples over stove in smelting and toppling process, and liquation fully melts, and cooling makes corundum crystallization micritization fast, and crystalline size can be controlled between the 30-150 μ m, has increased the snappiness of black corundum.Reduce starting the arc number of times, thereby reduce dust and noxious gas emission, more help environmental protection, and do not add carbon in the stove, the corresponding quality product that improved.Energy-saving and cost-reducing, compare stationary furnace saving electric energy per ton 150kwh.Reduce the labor force, topple over furnace foundation and originally do not have foundry returns and fritting body.It is stable to smelt the black corundum inner quality of coming out, and has not only reduced cost but also waste material is utilized fully.After adding chromium sesquioxide, improved the product abrasive wear resistance.
Embodiment
Embodiment 1
Raw material adds than classifying as: bauxitic clay tankage 70%, iron aluminum ore 29.5%, chromium sesquioxide 0.5%.
The black corundum and the technology smelting technology thereof that utilize waste material to smelt are:
E. carry out fragmentation after raw material being mixed in proportion;
F. add then and topple over stove and smelt, controlled temperature is 2050 ℃, and the time is 3 hours;
G. be poured directly into water jacket after the smelting fusing and connect bag, cool off, the time is 12 hours;
H. cooled material is poured out and carried out fragmentation, obtain the black corundum product, pack.
Adopt above technical scheme, smelted the black corundum inner quality of coming out and stablize, not only reduced cost but also waste material is utilized fully.After adding chromium sesquioxide, improved the product abrasive wear resistance.
Embodiment 2
Raw material adds than classifying as: bauxitic clay tankage 65%, iron aluminum ore 35%.
Toppling over the stove smelting temperature is 1900 ℃, and the time is 4 hours; Be 10 hours cooling time; Other steps are with implementation column 1.
Embodiment 3
Raw material adds than classifying as: bauxitic clay tankage 60%, iron aluminum ore 40%.
Toppling over the stove smelting temperature is 1800 ℃, and the time is 5 hours; Be 14 hours cooling time; Other steps are with implementation column 1.
Embodiment 4
Raw material adds than classifying as: bauxitic clay tankage 68%, iron aluminum ore 31.7%, chromium sesquioxide 0.3%.
Toppling over the stove smelting temperature is 2000 ℃, and the time is 4 hours; Be 13 hours cooling time; Other steps are with implementation column 1.
Claims (4)
1. black corundum and technology thereof of utilizing waste material to smelt, it is characterized in that raw material processes by following additional proportion: tankage 60～70% on the aluminium alum, iron aluminum ore 30～40%.
2. according to the described black corundum raw material that utilizes waste material to smelt of claim 1, it is characterized in that: the chromium sesquioxide of adding 0.3～0.5%.
3. according to claim 1 or the 2 described smelting technologyes that utilize the black corundum of waste material smelting, it is characterized in that:
A. carry out fragmentation after raw material being mixed in proportion;
B. add then and topple over stove and smelt, controlled temperature is 1800 ℃～2050 ℃, and the time is 3～5 hours;
C. be poured directly into water jacket after the smelting fusing and connect bag, cooled off 10～14 hours;
D. cooled material is poured out and carried out fragmentation, obtain the black corundum product, pack.
4. the smelting technology that utilizes the black corundum of waste material smelting according to claim 3, it is characterized in that: during smelting, controlled temperature is 2000 ℃, and the time is 4 hours; Be 12 hours cooling time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810230598A CN101723651A (en) | 2008-10-27 | 2008-10-27 | Black corundum smelted by using waste materials and process for smelting black corundum by using waste materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810230598A CN101723651A (en) | 2008-10-27 | 2008-10-27 | Black corundum smelted by using waste materials and process for smelting black corundum by using waste materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101723651A true CN101723651A (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810230598A Pending CN101723651A (en) | 2008-10-27 | 2008-10-27 | Black corundum smelted by using waste materials and process for smelting black corundum by using waste materials |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103567892A (en) * | 2013-11-01 | 2014-02-12 | 阳泉市中嘉磨料磨具有限公司 | Special ultrathin-sheet grinding wheel for stainless steel and preparation method |
| CN103950958A (en) * | 2014-04-24 | 2014-07-30 | 郑州烨达高新材料有限公司 | Process for fabricating black corundum |
| US9873182B2 (en) | 2012-07-31 | 2018-01-23 | Saint-Gobain Abrasives, Inc. | Abrasive wheels and methods for making and using same |
| US9873184B2 (en) | 2012-07-31 | 2018-01-23 | Saint-Gobain Abrasives, Inc. | Abrasive wheels and methods for making and using same |
-
2008
- 2008-10-27 CN CN200810230598A patent/CN101723651A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 茅福根等: "抛光用磨料－黑刚玉及其使用效果", 《磨料磨具与磨削》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9873182B2 (en) | 2012-07-31 | 2018-01-23 | Saint-Gobain Abrasives, Inc. | Abrasive wheels and methods for making and using same |
| US9873184B2 (en) | 2012-07-31 | 2018-01-23 | Saint-Gobain Abrasives, Inc. | Abrasive wheels and methods for making and using same |
| US11148256B2 (en) | 2012-07-31 | 2021-10-19 | Saint-Gobain Abrasives, Inc. | Abrasive wheels and methods for making and using same |
| CN103567892A (en) * | 2013-11-01 | 2014-02-12 | 阳泉市中嘉磨料磨具有限公司 | Special ultrathin-sheet grinding wheel for stainless steel and preparation method |
| CN103567892B (en) * | 2013-11-01 | 2016-08-17 | 阳泉市中嘉磨料磨具有限公司 | Rustless steel special superthin section emery wheel and preparation method |
| CN103950958A (en) * | 2014-04-24 | 2014-07-30 | 郑州烨达高新材料有限公司 | Process for fabricating black corundum |
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Application publication date: 20100609 |