CN1035061C - Method for prodn. of blue corundum abrasive - Google Patents
Method for prodn. of blue corundum abrasive Download PDFInfo
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- CN1035061C CN1035061C CN94111951A CN94111951A CN1035061C CN 1035061 C CN1035061 C CN 1035061C CN 94111951 A CN94111951 A CN 94111951A CN 94111951 A CN94111951 A CN 94111951A CN 1035061 C CN1035061 C CN 1035061C
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- blue corundum
- temperature
- corundum abrasive
- blue
- washing
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Abstract
The present invention provides a method for producing a blue corundum abrasive material. Natural blue corundum stones by mineral separation are made into a blue corundum abrasive material as a product through the processes of primary crushing, water flushing, stage crushing, water washing by a flotation agent, alkali washing, water washing, acid washing, water washing, dehydration, drying, calcination, cooling, screening and magnetic separation in sequence. In the method, energy is saved and no fusing process or smelting process is needed. By using the natural blue corundum stone as a raw material, storage capacity is large and cost is low. The hardness and the toughness of the blue corundum abrasive material as a product are higher than those of white fused alumina. The present invention is mainly used as new materials such as grinding wheel abrasive materials, fireproofing materials, industrial ceramics, etc.
Description
The present invention relates to a kind of production method of corundum abrasive, particularly relate to a kind of production method of blue corundum abrasive.
Present widely used corundum abrasive is to be raw material with the alundum as the white fused alumina abrasive material, melts refining through electric furnace and forms.Brown corundum abrasive is to be that raw material makes through electrosmelting with the aluminium vanadine.Deutsches Wirtschafts Patent 274404 discloses a kind of blue corundum and manufacture method thereof, is bauxite and reductive agent are made the blue corundum of product together after melting, ingot bar, granulation, magnetic separation and screening.This orchid corundum contains (Al
2O
3, TiO
2) Z (TiO, 2TiO
2) Z=0.2～2 crystal phases, LiO
2And/or Na
2The O glassy phase.Its purposes is made abrasive material or refractory materials.Above method energy consumption is big, and general power consumption is all more than 2500 degree/tons, and raw material alundum cost height wherein, needs from imports in a large number abroad.
The object of the present invention is to provide a kind of is raw material with natural blue corundum ore, adopts physico-chemical process to purify, and the production method of the low blue corundum abrasive of energy consumption.
The production method of the blue corundum abrasive of the present invention is, with the natural blue corundum ore (α-Al through the method gained of ore hand sorting
2O
3Content be 40～80%) for raw ore, it is crushed to granularity is below the 50mm, carry out the water flushing, the general flush-type crushing mill that adopts is removed surface dust foreign material in the mineral, carries out graded crushing again, wherein the one-level piece fragmentation of bulk can be adopted jaw crusher, granularity after the fragmentation is less than 30mm, adopts band sieve ball mill again and to the roller fragmentation, the granularity after the fragmentation is less than 0.7mm.With the flotation agent washing, flotation agent is the oils of proportion less than water then, and as kerosene, No. two flotation wet goods, consumption are flotation agent: mineral aggregate=0.5～2: 100 (weight), its effect are to utilize the further ore dressing of the difference of proportion.Mineral aggregate after the flotation carries out alkali cleaning, generally adopts as NaOH Na
2CO
3Deng stronger alkaline solution, its concentration is 6-8%, stirs under 0-80 ℃ of temperature in washing cylinder and soaks 3-12 hour, and the length of soak time determines just that by temperature the high more soak time of temperature is short more, and the purpose of alkali cleaning is the SiO that makes in the mineral aggregate
2With Si and alkali reaction, generate soluble silicate, thereby remove SiO a large amount of in the mineral aggregate
2And Si.Wash, remove the residual alkali in the mineral aggregate, washing is general adopts the agitator agitator treating, or uses the pressurized air agitator treating, makes mineral aggregate pH value be 6-7.Further pickling is as adopting H
2SO
4, acid such as HCl, its concentration is 8-20%, stirs under 0-80 ℃ of temperature in washing cylinder and soaks 6-46 hour, temperature is high more, soak time is short more, the effect of pickling is impurity iron and other objectionable impurities of removing in the mineral aggregate, as Fe
2O
3, Fe
3O
4Deng.Wash, remove excessive acid, making mineral aggregate pH value is 6～7, after the centrifuge dehydration, drying and calcining under 180～600 ℃ of temperature is removed the moisture content in the mineral aggregate on the one hand, simultaneously coarse particles is broken under comparatively high temps and become single particle, temperature is high more, and time of drying is short more, generally adopts the Rotary drying mode, make material through the low temperature of associating to the pyritous drying process, material can remove the unstable corner angle of particulate in Rotary drying, play shaping operation, thereby increase its hardness.Be cooled to room temperature at last, naturally cooling gets final product, and sieves by abrasive material country granulometry, carries out magnetic separation again, further removes the impurity iron in the mineral aggregate, makes the blue corundum abrasive of product.
The advantage of the blue corundum abrasive production method of the present invention is not have the melting smelting process, energy-conservation, utilize natural blue corundum ore to make raw material, reserves are big, cost is low, and the hardness and the toughness of products obtained therefrom abrasive material are better than white fused alumina, the resistance to abrasion height, be particularly suitable for the grinding steel alloy, also can be used as type materials such as high grade refractory and industrial ceramics.
Describe the present invention in detail below in conjunction with embodiment
Embodiment 1:
Natural blue corundum ore just is broken to about granularity 30mm, water flushing on wheel roller, remove the surface dust foreign material, dry back graded crushing to granularity less than 0.7mm, wash with the kerosene flotation agent, consumption is a kerosene: mineral aggregate=2: 100 (weight), remove the little impurity of proportion after, under 18～20 ℃ of temperature with 10.5% Na
2CO
3Solution soaking 6 hours is removed SiO wherein
2And Si, being washed to mineral aggregate pH value again is 6～7, under 18～20 ℃ of temperature with 20% salt acid soak 15 hours, remove impurity iron wherein etc., being washed to mineral aggregate pH value again is 6～7, centrifuge dehydration, drying and calcining under 180～500 ℃ of temperature, be cooled to room temperature, screening gets the blue corundum abrasive of product after the magnetic separation.Its performance is shown in table 1, table 2.
Embodiment 2:
Natural blue corundum ore just is broken to about granularity 40mm, water flushing on wheel roller, remove the surface dust foreign material, graded crushing to granularity less than 0.7mm, with the washing of No. 2 flotation oils, consumption is No. two flotation oils: mineral aggregate=1.5: 100 (weight), after removing the little impurity of proportion, under 70～80 ℃ of temperature, use 6%NaOH solution soaking 3 hours, remove SiO wherein
2And Si, being washed to mineral aggregate pH value again is 6～7, sulfuric acid with 12% under 70～80 ℃ of temperature soaked 12 hours, remove impurity iron wherein etc., being washed to mineral aggregate pH value again is 6～7, centrifuge dehydration, under 180～300 ℃ of temperature drying and calcining, be cooled to room temperature, screening gets the blue corundum abrasive of product after the magnetic separation.Its performance is shown in table 1, table 2.
Table 1: blue corundum abrasive physicals
Table 2: blue corundum abrasive Chemical Composition
| The single particle intensity level | The 14# single particle | Be not less than 10.07Kg |
| The 24# single particle | Be not less than 6.54Kg | |
| The 46# single particle | Be not less than 2.01Kg | |
| Microhardness Hv | 22089 newton/mm 2 | |
| The 46# relative density | Pellet density | Be no less than 3.79g/cm 2 |
| Tap density | Be no less than 1.70g/cm 2 | |
| Size composition | The regulation that meets GB 2477-83 abrasive grain and composition thereof | |
| Magnetic material content | 0.0014％ | |
| The iron alloy grain | 0 | |
| Granularity | Al 2O 3Be no less than | SiO 2No more than | Fe 2O 3No more than | TiO 2No more than |
| 12#～90# | 93.5 | 0.40 | 0.57 | 1.20 |
| 100～240# | 93.0 | 0.43 | 0.60 | 1.25 |
Claims (1)
1, a kind of production method of blue corundum abrasive, it is characterized in that the natural blue corundum ore after the ore dressing just is broken to granularity less than 50mm, water is removed the surface dust foreign material towards Xian, carry out then graded crushing to granularity less than 0.7mm, wash with flotation agent, its weight consumption is than being flotation agent: mineral aggregate=0.5～2: 100, use concentration 6-8% again, a kind of alkali lye that is selected from sodium hydroxide or the yellow soda ash carries out alkali cleaning, stir during alkali cleaning to soak to wash with water in 3-12 hour under 0-80 ℃ of temperature and use concentration 8-20% again, pickling is carried out in a kind of acid that is selected from sulfuric acid or the hydrochloric acid, stirs under 0-80 ℃ of temperature during pickling and soaks 6-46 hour, again after the washing, carry out centrifuge dehydration, drying and calcining under 180-600 ℃ of temperature is cooled to room temperature, screening gets the blue corundum abrasive of product after the magnetic separation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111951A CN1035061C (en) | 1994-11-04 | 1994-11-04 | Method for prodn. of blue corundum abrasive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94111951A CN1035061C (en) | 1994-11-04 | 1994-11-04 | Method for prodn. of blue corundum abrasive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1108287A CN1108287A (en) | 1995-09-13 |
| CN1035061C true CN1035061C (en) | 1997-06-04 |
Family
ID=5035773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94111951A Expired - Fee Related CN1035061C (en) | 1994-11-04 | 1994-11-04 | Method for prodn. of blue corundum abrasive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1035061C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101906663B (en) * | 2010-08-09 | 2012-05-09 | 西峡县正弘单晶刚玉有限责任公司 | Blue ssuperindividual corundum and preparation method thereof |
| CN102199041B (en) * | 2011-03-21 | 2013-03-27 | 焦作市山阳亚白刚玉厂 | Sub-white corundum and production method thereof |
| CN103101951B (en) * | 2011-11-14 | 2014-12-10 | 雅宝研磨材(苏州)有限公司 | Method for separating mineral impurities in corundum abrasive materials |
| CN103525365A (en) * | 2012-12-06 | 2014-01-22 | 郑州新安华砂轮有限公司 | Abrasive and production method thereof |
| CN104624358A (en) * | 2013-11-07 | 2015-05-20 | 孔龙 | Diamond abrasive material impurity removing method |
| CN107541189A (en) * | 2017-08-22 | 2018-01-05 | 郑州威源新材料有限公司 | A kind of production method for ensureing that fused alumina zirconia abrasive grain composition is stable |
| CN108048035A (en) * | 2017-10-31 | 2018-05-18 | 江西纳朴实业有限公司 | A kind of preparation method of cobble shaped ceramic grinding media |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049008A (en) * | 1990-08-18 | 1991-02-06 | 双城市龙江磨料磨具厂 | Production method of brown corundum |
-
1994
- 1994-11-04 CN CN94111951A patent/CN1035061C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049008A (en) * | 1990-08-18 | 1991-02-06 | 双城市龙江磨料磨具厂 | Production method of brown corundum |
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| Publication number | Publication date |
|---|---|
| CN1108287A (en) | 1995-09-13 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Free format text: CORRECT: PATENTEE; FROM: CHENGHUA-HENGDA SCIENCE + TRADE CORP., CHENGDU TO: CHONGQING LANGANGYU ABRASIVES AND ABRADING INSTRUMENTS CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 630015 No. 74, man street, Yuzhong District, Chongqing Patentee after: Chongqing LAN Gang Abrasives Co., Ltd. Address before: 610081 No. 222, Jiefang Road, Sichuan, Chengdu Patentee before: Chenghua-hengda Science & Trade Corp., Chengdu |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |