CN101705076A - Method for producing green silicon carbide FEPA F P - Google Patents
Method for producing green silicon carbide FEPA F P Download PDFInfo
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- CN101705076A CN101705076A CN200910044494A CN200910044494A CN101705076A CN 101705076 A CN101705076 A CN 101705076A CN 200910044494 A CN200910044494 A CN 200910044494A CN 200910044494 A CN200910044494 A CN 200910044494A CN 101705076 A CN101705076 A CN 101705076A
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Abstract
The invention provides a method for producing green silicon carbide FEPA F P, comprising the following steps in turn: sifting raw materials, grinding, classifying by air flow, cleaning by water, classifying by water conservancy and coating surface, filtering by pressure, drying, calcining, sieving, packaging and warehousing. The invention uses a Raymond grinder for grinding and an air flow classification device for multiple classification, and classifies into products in different levels by water conservatory classification; in water conservatory classification, cladding materials are used as dispersant; in classification, water pressure is stable, multi-level precision is improved by siphon overflow classification, impurities in the crack of the micro powder grains are fully evaporated by calcination and tempering in the later period of production, and the cracks can be healed by high-temperature calcination. The production method in the invention greatly enhances product purity, increases crushing resistance of the grains in grinding and polishing, the grain fineness distribution is even with no large grain and with excellent shape and good affinity to grinding liquid. The invention can produce various green silicon carbide FEPA F P with grain size being less than 100mm.
Description
Technical field
The present invention relates to abrasive substance, i.e. the production method of green silicon carbide FEPA F P.
Background technology
Green silicon carbide has high rigidity, high-melting-point, high stability, high thermal conductivity, low thermal expansion, low plasma pollutes, low induced activity, the corrosion-resistant excellent properties that waits, the high-quality green silicon carbide FEPA F P of international most advanced level, narrow particle size distribution, the meso-position radius deviation is little, the high no macrobead of hardness, particle shape is controlled, the tap density height, specific surface area is big, be used to make the high-performance ceramics that automobile is used and ultra-high speed large vol unicircuit is used, make high grade refractory, producing 6～12 inches single-chips, the polycrystalline silicon used for solar battery sheet, piezoelectric crystal plate, make high precision cutting and grinding polishing material during products such as optical filter.
High-quality green silicon carbide FEPA F P is a kind of product of high technology content, and market is the situation that supply falls short of demand, and the product of some specification is dependence on import still.Develop rapidly along with semicon industry and solar cell industry, green silicon carbide FEPA F P quality and output have been proposed requirements at the higher level, require this product chemical purity height, even particle size distribution, no macrobead, good, the anti-breaking capacity of particle shape strong, with cutting, lapping liquid good affinity etc. is arranged.But for a long time, there are several problems in China's silicon carbide production always, the one, and particle is inhomogeneous; The 2nd, the physical and chemical performance of particle surface is poor, forms the phenomenon of powder reuniting easily, and antistatic property is poor; The 3rd, because the crackle in the particle has reduced anti-breaking capacity and mill efficiency.The main dependence on import of domestic market demand.Therefore, in China, press for high-quality green silicon carbide FEPA F P production technology and relevant device that exploitation has independent intellectual property right.
Summary of the invention
In order to realize producing the dream of high-quality green silicon carbide FEPA F P, the invention provides production method from the green silicon carbide crude product to high-quality green silicon carbide FEPA F P with common home equipment.
The production method of this green silicon carbide FEPA F P comprises picking of raw material, fragmentation, air classification, washing, water conservancy classification and surperficial coated, filtering under pressure, drying successively, calcines, sieves and packs the warehouse-in step, it is characterized in that:
One, picking of raw material, the green silicon carbide ingredient requirement particle diameter that silica sand and carbonaceous material pyroreaction are obtained be less than 20mm, green silicon carbide content＞95%, moisture content＜2%;
Two, adopt thunder to cover pulverizer and pulverize, going out the machine granularity is 0.005～0.200mm;
Three, air classification: the air classification system comprises all diffusing device of material, 2～4 impeller grading machines, cyclone classifier, bag collector and high pressure positive blowers, they are cascaded by airduct successively, to not enter the coarse fodders at different levels of bag collector, and return thunder illiteracy pulverizer without exception and pulverize once more;
Four, washing: with the fines in the bag collector, particle diameter is poured washing pool into below 100 microns, add sulfuric acid during washing, make it that the sulfuric acid weight concentration is 1～3% in the water lotion, washing while stirring, 3～4 hours, use clear water rinsing secondary after the pickling, each 3～4 hours;
Five, water conservancy classification and surperficial coated: with the concentration after overpickling is in the slip input settling tank of 300～600 grams per liters, ten thousand/extremely millesimal dispersion agents that add solid materials weight in the slip, stir, standing sedimentation then, after 1～8 hour, with siphon pipe the upper strata slip is emitted, emit height 20～30cm, in settling tank, add the liquid level of clear water to the siphon then, and add the dispersion agent of throwing in for the 1st time weight 5%～10%, again with last time the same stirring, sedimentation, siphon, so operation is 8～10 times, can obtain other micro mist of level, after this still in settling bowl, add clear water and dispersion agent, stir, sedimentation, siphon, but shorten the settled time, sedimentation time according to new settings is operated 8～10 times, can obtain another other particulate of level again, classification is carried out from fine to coarse, finishes above-mentioned dispersion agent until whole classifications, promptly clad material, by water glass, peach gum, in polypropylene methanesulfonic sodium and the triethanol ammonium one or more are formed, and water glass is liquid glass industrial on the market, and following steps are carried out respectively by different grades;
Six, filtering under pressure: applying pressure filter, liquid level pressure are 0.3～0.6MPa;
Seven, drying: the material after will filtering send roaster or oven drying, 70～100 ℃ of temperature;
Eight, calcining: in calcining furnace, temperature time curve is symmetrical para-curve, room temperature～500 ℃, 5～10 minutes, 500～1000 ℃, 3～5 minutes, 1000～1500 ℃, 1～3 minute, 1000～500 ℃, 3～5 minutes, 500 ℃～room temperature, 5～10 minutes;
Nine, sieve: adopt airflow shifting machine or ultrasonic screening machine, the material of different grades is set different sieve diameters;
Ten, packing warehouse-in.
The present invention adopts thunder to cover pulverizer and pulverizes, carry out multiple fractionation with air classification equipment, adopt the water conservancy classification to be divided into the product of different stage, in the water conservancy classification, used the cladding material to make dispersion agent, in classification, stable water pressure, the siphon overflow size separation has improved the fractionated precision, produces later stage calcining tempering, impurity in the micro powder granule crackle is fully volatilized, and tiny crack being healed again by high-temperature calcination, production method of the present invention has improved the purity of product greatly, strengthened the anti-breaking capacity of particle in grinding-polishing, even particle size distribution, no macrobead, particle shape is good, with lapping liquid good affinity is arranged, the present invention can produce the various green silicon carbide FEPA F Ps of particle diameter below 100 microns.
Description of drawings
Fig. 1 is an air classification system schematic of the present invention.
Among the figure: 1, thunder covers pulverizer, and 2, the material device that all looses, 3, the impeller grading machine, 4, cyclone classifier, 5, bag collector, 6, high pressure positive blower, 7, airduct.
Embodiment
Below by embodiment, as follows to the detailed description of the invention in conjunction with the accompanying drawings:
The production method of this green silicon carbide FEPA F P comprises picking of raw material, fragmentation, air classification, washing, water conservancy classification and surperficial coated, filtering under pressure, drying successively, calcines, sieves and packs the warehouse-in step, specifies in following:
One, picking of raw material, the green silicon carbide ingredient requirement particle diameter that silica sand and carbonaceous material pyroreaction are obtained be less than 20mm, green silicon carbide content＞95%, moisture content＜2%;
Two, adopt thunder to cover pulverizer 1 and pulverize, going out the machine granularity is 0.005～0.200mm;
Three, air classification: in Fig. 1, the air classification system comprises material all diffusing device 2,3 impeller grading machines 3, cyclone classifier 4, bag collector 5 and high pressure positive blowers 6, they are cascaded by airduct 7 successively, to not enter the coarse fodders at different levels of bag collector, and return thunder illiteracy pulverizer 1 without exception and pulverize once more;
Four, washing: with the fines in the bag collector, particle diameter is poured washing pool into below 100 microns, add sulfuric acid during washing, make it that the sulfuric acid weight concentration is 2% in the water lotion, washing while stirring, 3 hours, use clear water rinsing secondary after the pickling, each 4 hours;
Five, water conservancy classification and surperficial coated: with the concentration after overpickling is in the slip input settling tank of 500 grams per liters, 5/10000ths of solid materials weight dispersion agent in the adding slip, stir, standing sedimentation then, after 1～8 hour, with siphon pipe the upper strata slip is emitted, emit height 25cm, in settling tank, add the liquid level of clear water to the siphon then, and add the dispersion agent of throwing in for the 1st time weight 8%, again with last time the same stirring, sedimentation, siphon, so operation is 8 times, can obtain other micro mist of level, after this still in settling bowl, add clear water and dispersion agent, stir, sedimentation, siphon, but shorten the settled time, sedimentation time according to new settings is operated 8 times, can obtain another other particulate of level again, and classification is carried out from fine to coarse, finish until whole classifications, above-mentioned dispersion agent promptly clads material, by water glass, peach gum, polypropylene methanesulfonic sodium and triethanol ammonium are formed, in the cladding material, each composition weight equates that water glass is liquid glass industrial on the market, and following steps are carried out respectively by different grades;
Six, filtering under pressure: applying pressure filter, liquid level pressure are 0.45MPa;
Seven, drying: the material after will filtering send roaster or oven drying, 80 ℃ of temperature;
Eight, calcining: in calcining furnace, temperature time curve is symmetrical para-curve, room temperature～500 ℃, 5 minutes, 500～1000 ℃, 3 minutes, 1000～1500 ℃, 1 minute, 1000～500 ℃, 3 minutes, 500 ℃～room temperature, 5 minutes;
Nine, sieve: adopt airflow shifting machine, the material of different grades is set different sieve diameters;
Ten, packing warehouse-in.
Obtain the high-quality green silicon carbide FEPA F P of various granularities at last from GB F230 to F1200
Claims (1)
1. the production method of green silicon carbide FEPA F P comprises picking of raw material, fragmentation, air classification, washing, water conservancy classification and surperficial coated, filtering under pressure, drying successively, calcines, sieves and packs the warehouse-in step, it is characterized in that:
One, picking of raw material, the green silicon carbide ingredient requirement particle diameter that silica sand and carbonaceous material pyroreaction are obtained be less than 20mm, green silicon carbide content＞95%, moisture content＜2%;
Two, adopt thunder to cover pulverizer and pulverize, going out the machine granularity is 0.005～0.200mm;
Three, air classification: the air classification system comprises all diffusing device of material, 2～4 impeller grading machines, cyclone classifier, bag collector and high pressure positive blowers, they are cascaded by airduct successively, to not enter the coarse fodders at different levels of bag collector, and return thunder illiteracy pulverizer without exception and pulverize once more;
Four, washing: with the fines in the bag collector, particle diameter is poured washing pool into below 100 microns, add sulfuric acid during washing, make it that the sulfuric acid weight concentration is 1～3% in the water lotion, washing while stirring, 3～4 hours, use clear water rinsing secondary after the pickling, each 3～4 hours;
Five, water conservancy classification and surperficial coated: with the concentration after overpickling is in the slip input settling tank of 300～600 grams per liters, ten thousand/extremely millesimal dispersion agents that add solid materials weight in the slip, stir, standing sedimentation then, after 1～8 hour, with siphon pipe the upper strata slip is emitted, emit height 20～30cm, in settling tank, add the liquid level of clear water to the siphon then, and add the dispersion agent of throwing in for the 1st time weight 5%～10%, again with last time the same stirring, sedimentation, siphon, so operation is 8～10 times, can obtain other micro mist of level, after this still in settling bowl, add clear water and dispersion agent, stir, sedimentation, siphon, but shorten the settled time, sedimentation time according to new settings is operated 8～10 times, can obtain another other particulate of level again, classification is carried out from fine to coarse, finishes above-mentioned dispersion agent until whole classifications, promptly clad material, by water glass, peach gum, in polypropylene methanesulfonic sodium and the triethanol ammonium one or more are formed, and water glass is liquid glass industrial on the market, and following steps are carried out respectively by different grades;
Six, filtering under pressure: applying pressure filter, liquid level pressure are 0.3～0.6MPa;
Seven, drying: the material after will filtering send roaster or oven drying, 70～100 ℃ of temperature;
Eight, calcining: in calcining furnace, temperature time curve is symmetrical para-curve, room temperature～500 ℃, 5～10 minutes, 500～1000 ℃, 3～5 minutes, 1000～1500 ℃, 1～3 minute, 1000～500 ℃, 3～5 minutes, 500 ℃～room temperature, 5～10 minutes;
Nine, sieve: adopt airflow shifting machine or ultrasonic screening machine, the material of different grades is set different sieve diameters;
Ten, packing warehouse-in.
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| CN101898762A (en) * | 2010-07-19 | 2010-12-01 | 王国恩 | Production process for multi-edge silicon micropowder used for linear cutting |
| CN101947483A (en) * | 2010-08-12 | 2011-01-19 | 河南醒狮高新技术股份有限公司 | Method for forming blade material particles special for wire-electrode cutting of semiconductor material and ultra-hard material |
| CN102530944A (en) * | 2012-03-16 | 2012-07-04 | 河南醒狮高新技术股份有限公司 | Method for manufacturing silicon carbide blade material for grinding and polishing sapphire and special grading device |
| CN103056019A (en) * | 2012-12-15 | 2013-04-24 | 河南富耐克超硬材料股份有限公司 | Multistage micro powder sorting method and micro powder sorting device for implementing method |
| CN105498944A (en) * | 2015-11-27 | 2016-04-20 | 山田研磨材料有限公司 | Overflow-circulation classification method for diamond micro-powder |
| CN105764620A (en) * | 2013-10-24 | 2016-07-13 | 麦拓卡夫特有限公司 | Method and system for cleaning contaminated silicon carbide particles |
| CN105855034A (en) * | 2016-04-01 | 2016-08-17 | 宝兴易达光伏刃料有限公司 | Hydraulic overflow classification technology for silicon carbide |
| 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 |
| CN108837926A (en) * | 2018-06-21 | 2018-11-20 | 自贡市锋锐新材料有限公司 | A kind of production line and production method for the production of single specification sword material |
| CN109627045A (en) * | 2018-12-11 | 2019-04-16 | 宁波伏尔肯科技股份有限公司 | The original position of micro-crack makes method up after a kind of grinding of silicon carbide ceramics |
| CN109971421A (en) * | 2019-03-20 | 2019-07-05 | 广东工业大学 | A kind of producing device and production method of grinding and polishing compound particle |
| CN110385261A (en) * | 2019-08-19 | 2019-10-29 | 长沙石立超硬材料有限公司 | A kind of diamond and graphite separator and separation method |
| CN110416062A (en) * | 2018-04-27 | 2019-11-05 | 半导体元件工业有限责任公司 | Semiconductor substrate crackle alleviates system and correlation technique |
| EP3640227A1 (en) * | 2018-10-15 | 2020-04-22 | Vecor IP Holdings | Process for making a ceramic particulate mixture |
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| CN113277515A (en) * | 2020-09-30 | 2021-08-20 | 连云港市沃鑫高新材料有限公司 | High-purity silicon carbide micro powder for silicon wafer cutting and preparation device and method thereof |
| CN116924409A (en) * | 2023-07-31 | 2023-10-24 | 苏州汉华光电科技有限公司 | Preparation method of nano silicon carbide abrasive |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU994454A1 (en) * | 1981-03-11 | 1983-02-07 | Донецкий Институт Советской Торговли | Abrasive material |
| JPS62167212A (en) * | 1986-01-21 | 1987-07-23 | Osamu Yamada | Production of beta-type silicon carbide powder |
| CN87103890A (en) * | 1986-05-30 | 1988-03-02 | 斯坦科尔公司 | Autogenous attrition grinding |
| CN1344675A (en) * | 2001-08-07 | 2002-04-17 | 宁夏回族自治区新技术应用研究所 | Production process of submicron level silicon carbide |
| CN1751991A (en) * | 2005-07-23 | 2006-03-29 | 王淑贤 | Preparation method of nano-grade silicon carbide powder |
| CN1951574A (en) * | 2005-10-21 | 2007-04-25 | 夏玉策 | Method for preparing fine powder of silicon carbide |
-
2009
- 2009-09-30 CN CN 200910044494 patent/CN101705076B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU994454A1 (en) * | 1981-03-11 | 1983-02-07 | Донецкий Институт Советской Торговли | Abrasive material |
| JPS62167212A (en) * | 1986-01-21 | 1987-07-23 | Osamu Yamada | Production of beta-type silicon carbide powder |
| CN87103890A (en) * | 1986-05-30 | 1988-03-02 | 斯坦科尔公司 | Autogenous attrition grinding |
| CN1344675A (en) * | 2001-08-07 | 2002-04-17 | 宁夏回族自治区新技术应用研究所 | Production process of submicron level silicon carbide |
| CN1751991A (en) * | 2005-07-23 | 2006-03-29 | 王淑贤 | Preparation method of nano-grade silicon carbide powder |
| CN1951574A (en) * | 2005-10-21 | 2007-04-25 | 夏玉策 | Method for preparing fine powder of silicon carbide |
Non-Patent Citations (2)
| Title |
|---|
| 吴澜尔，祁利民，刘雅琴等: "碳化硅搅拌磨超细研磨", 《中国粉体技术》 * |
| 祁利民，刘雅琴，吴澜尔: "亚微米碳化硅超细粉体的制备及破碎机理探讨", 《粉末冶金技术》 * |
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| EP3640227A1 (en) * | 2018-10-15 | 2020-04-22 | Vecor IP Holdings | Process for making a ceramic particulate mixture |
| US11905216B2 (en) | 2018-10-15 | 2024-02-20 | Vecor Ip Holdings Limited | Process for making a ceramic particulate mixture |
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| CN113277515A (en) * | 2020-09-30 | 2021-08-20 | 连云港市沃鑫高新材料有限公司 | High-purity silicon carbide micro powder for silicon wafer cutting and preparation device and method thereof |
| CN113277515B (en) * | 2020-09-30 | 2024-05-28 | 连云港市沃鑫高新材料有限公司 | High-purity silicon carbide micro powder for silicon wafer cutting and preparation device and method thereof |
| CN112958296A (en) * | 2021-02-05 | 2021-06-15 | 张鹏飞 | Dry method for producing powder purifying processor by fracturing propping agent quartz sand |
| CN112958296B (en) * | 2021-02-05 | 2023-07-28 | 张鹏飞 | Powder purifying processor for dry production of fracturing propping agent quartz sand |
| CN116924409A (en) * | 2023-07-31 | 2023-10-24 | 苏州汉华光电科技有限公司 | Preparation method of nano silicon carbide abrasive |
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| CN117680257B (en) * | 2024-02-01 | 2024-04-26 | 晋江哈创投资有限公司 | Intelligent airflow powder crushing and grading system |
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