CN103172353A - Method for sintering microcrystalline alumina-toughened ceramic grinding ball - Google Patents
Method for sintering microcrystalline alumina-toughened ceramic grinding ball Download PDFInfo
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- CN103172353A CN103172353A CN2013101095432A CN201310109543A CN103172353A CN 103172353 A CN103172353 A CN 103172353A CN 2013101095432 A CN2013101095432 A CN 2013101095432A CN 201310109543 A CN201310109543 A CN 201310109543A CN 103172353 A CN103172353 A CN 103172353A
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- microcrystalline alumina
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Abstract
The invention discloses a method for sintering a microcrystalline alumina-toughened ceramic grinding ball. The method taking kaolin, silicon micropowder, and microcrystalline alumina as main raw materials, and calcium carbonate, magnesium carbonate and sodium carbonate as sintering auxiliaries comprises the steps of performing ball grinding according to proper proportion, atomizing and drying to obtain raw powder; and pelletizing through a ball grinding machine, and then sintering for 10-20 hours at 1200-1300 DEG C to obtain the compact wear-resistant high-strength microcrystalline alumina-toughened ceramic grinding ball.
Description
Technical field
The present invention relates to a kind of grinding medium, relate in particular to a kind of preparation method of microcrystalline alumina toughening ceramic mill ball.
Background technology
Mill ball is widely used in the industries such as mineral products, metallurgy, chemical industry, food, building materials, and the various ways such as the collision by mill ball, friction, rolling, extruding is with raw material pulverizing and mixing.The quality of mill ball has a strong impact on production efficiency and product quality.
In recent years, superfine powder technique develop exploitation with low-grade mineral products rapidly, greatly driven the development and production of mill ball medium.Grinding medium commonly used has steel, quartz, glass, aluminum oxide, zirconium white, zirconium silicate, silicoaluminate pottery etc.Zirconium white, zirconium silicate better than great performance belong to high-end abrasive substance, but price comparison is high; Although and other common ceramic grinding ball, the price comparison of glass sphere grinding medium are low, mill efficiency is low, wears away highly, and intensity is low.
The microcrystalline alumina grinding medium is the new grinding material of new development in recent years, has the advantages such as mill efficiency is high, abrasion are low, but high by (1500 as the material sintering temperature of alumina host
0C), the sintering difficulty, production cost is high.And the high grain-size control difficulty that causes microcrystalline alumina of sintering temperature, be easy to misgrowth, cause the decline of material property.
Summary of the invention
The present invention is directed to above-mentioned deficiency provides a kind of sintering temperature low, keeps the ultra-fine uniform grain-size of microcrystalline alumina, the low-temperature sintering microcrystalline alumina toughening ceramic mill ball method that performance is high, cost is low.
Key problem in technology of the present invention is take kaolin, silicon powder, microcrystalline alumina as substrate material, by adding special complex sintering aids formula, reduce that sintering temperature obtains densification, high strength, lowly wears away, microcrystalline alumina toughening ceramic mill ball cheaply, concrete technical scheme is as follows: a kind of method of low-temperature sintering microcrystalline alumina toughening ceramic mill ball is characterized in that comprising the following steps:
A gets mass percent: 10% ~ 40% kaolin, 10% ~ 30% silicon powder, 15% ~ 40% microcrystalline alumina are as substrate material;
B gets mass percent: 0.5% ~ 5% calcium carbonate, 0.5% ~ 5% magnesiumcarbonate, 0.5% ~ 5% salt of wormwood, 0.5% ~ 5% sodium carbonate are as sintering aid;
C mixes substrate material and the sintering aid of said ratio, and adds entry and mill ball ball milling;
D obtains the slurry that mixes after 3 hours through ball milling, and drying obtains raw material powder;
It is 0.2mm ~ 13mm biscuit ball that e obtains diameter with the above-mentioned raw materials powder by the bowling machine moulding, and biscuit ball warp oversintering is obtained finished product.
As another key problem in technology of the present invention, described substrate material and sintering aid mix: water: the mill ball ratio is 1:1.5:3.
As preferably, described sintering step is: with 10
0C/min is warmed up to 1000
0C, then 2
0C/min is warmed up to sintering temperature 1200 ~ 1300
0C is incubated 3 ~ 5 hours, then naturally cools to room temperature.
By the prepared crystallite compound alumina ceramic of technique scheme mill ball, density is 2.7-3.2g/cm
3, Vickers' hardness is 700-1000Gpa, fracture toughness property is 1.8-2.8 MPa.m
1/2, crushing strength is 700-900N, and abrasion are 1-2g/hr.kg certainly, and the abrasion of band material are 2-3g/hr.kg.
Beneficial effect of the present invention: the present invention is by selecting rational raw material and proportioning, densification, high strength, low abrasion, microcrystalline alumina toughening ceramic mill ball cheaply be can produce with lower sintering temperature, production efficiency and quality product greatly improved.
Embodiment
Embodiment 1: a kind of method of low-temperature sintering microcrystalline alumina toughening ceramic mill ball comprises the following steps:
A gets mass percent: 30% kaolin, 20% silicon powder, 40% microcrystalline alumina are as substrate material;
B gets mass percent: 2% calcium carbonate, 2.5% magnesiumcarbonate, 5% salt of wormwood, 0.5% sodium carbonate are as sintering aid;
C mixes substrate material and the sintering aid of said ratio, and adds entry and mill ball ball milling;
D obtains the slurry that mixes after 3 hours through ball milling, and drying obtains raw material powder;
It is 0.2mm ~ 13mm biscuit ball that e obtains diameter with the above-mentioned raw materials powder by the bowling machine moulding, and biscuit ball warp oversintering is obtained finished product.
Described substrate material and sintering aid mix: water: the mill ball ratio is 1:1.5:3.
Described sintering step is: with 10
0C/min is warmed up to 1000
0C, then 2
0C/min is warmed up to sintering temperature 1300
0C is incubated 3 hours, then naturally cools to room temperature.Prepared microcrystalline alumina toughening ceramic mill ball, density is 3.2g/cm
3, Vickers' hardness is 1000Gpa, fracture toughness property is 2.8 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 900N, and abrasion are 1.0g/hr.kg certainly, and the abrasion of band material are 2.0g/hr.kg.
Embodiment 2 ~ 8: with reference to embodiment 1, revises the above-mentioned raw materials proportioning, makes table one, as follows:
Embodiment 2: prepared microcrystalline alumina toughening ceramic mill ball, density is 2.7g/cm
3, Vickers' hardness is 700Gpa, fracture toughness property is 1.8 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 700N, and abrasion are 2.0g/hr.kg certainly, and the abrasion of band material are 3.0g/hr.kg.
Embodiment 3: prepared microcrystalline alumina toughening ceramic mill ball, density is 3.0g/cm
3, Vickers' hardness is 900Gpa, fracture toughness property is 2.4 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 800N, and abrasion are 1.6g/hr.kg certainly, and the abrasion of band material are 2.4g/hr.kg.
Embodiment 4: prepared microcrystalline alumina toughening ceramic mill ball, density is 2.7g/cm
3, Vickers' hardness is 800Gpa, fracture toughness property is 2.0 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 780N, and abrasion are 1.5g/hr.kg certainly, and the abrasion of band material are 2.7g/hr.kg.
Embodiment 5: prepared microcrystalline alumina toughening ceramic mill ball, density is 3.2g/cm
3, Vickers' hardness is 1000Gpa, fracture toughness property is 2.2 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 870N, and abrasion are 1.0g/hr.kg certainly, and the abrasion of band material are 1.9g/hr.kg.
Embodiment 6: prepared microcrystalline alumina toughening ceramic mill ball, density is 2.7g/cm
3, Vickers' hardness is 800Gpa, fracture toughness property is 1.8 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 710N, and abrasion are 1.8g/hr.kg certainly, and the abrasion of band material are 2.8g/hr.kg.
Embodiment 7: prepared microcrystalline alumina toughening ceramic mill ball, density is 2.8g/cm
3, Vickers' hardness is 820Gpa, fracture toughness property is 2.1 MPa. m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 750N, and abrasion are 1.9g/hr.kg certainly, and the abrasion of band material are 2.6g/hr.kg.
Embodiment 8: prepared microcrystalline alumina toughening ceramic mill ball, density is 2.8g/cm
3, Vickers' hardness is 850Gpa, fracture toughness property is 2.8 MPa.m
1/2, when microcrystalline alumina toughening ceramic mill ball diameter was 4mm, its crushing strength was 900N, and abrasion are 1.4g/hr.kg certainly, and the abrasion of band material are 2.0g/hr.kg.
Claims (3)
1. the method for a low-temperature sintering microcrystalline alumina toughening ceramic mill ball is characterized in that comprising the following steps:
A gets mass percent: 10% ~ 40% kaolin, 10% ~ 30% silicon powder, 15% ~ 40% microcrystalline alumina are as substrate material;
B gets mass percent: 0.5% ~ 5% calcium carbonate, 0.5% ~ 5% magnesiumcarbonate, 0.5% ~ 5% salt of wormwood, 0.5% ~ 5% sodium carbonate are as sintering aid;
C mixes substrate material and the sintering aid of said ratio, and adds entry and mill ball ball milling;
D obtains the slurry that mixes after 3 hours through ball milling, and drying obtains raw material powder;
It is 0.2mm ~ 13mm biscuit ball that e obtains diameter with the above-mentioned raw materials powder by the bowling machine moulding, and biscuit ball warp oversintering is obtained finished product.
2. the method for a kind of low-temperature sintering microcrystalline alumina toughening ceramic mill ball according to claim 1, it is characterized in that described substrate material and sintering aid mix: water: the mill ball ratio is 1:1.5:3.
3. the method for a kind of low-temperature sintering microcrystalline alumina toughening ceramic mill ball according to claim 1, is characterized in that described sintering step is: with 10
0C/min is warmed up to 1000
0C, then 2
0C/min is warmed up to sintering temperature 1200 ~ 1300
0C is incubated 3 ~ 5 hours, then naturally cools to room temperature.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468206A (en) * | 2013-09-23 | 2013-12-25 | 浙江湖磨抛光磨具制造有限公司 | Ultrafine grinding media for calcium carbonate powder and preparation method of ultrafine grinding media |
| CN106747362A (en) * | 2017-03-06 | 2017-05-31 | 广州浩方节能科技有限公司 | A kind of ceramic grinding body and preparation method thereof |
| CN106747355A (en) * | 2016-12-15 | 2017-05-31 | 萍乡顺鹏新材料有限公司 | A kind of ceramic grinding body and preparation method thereof |
| CN107814560A (en) * | 2017-09-30 | 2018-03-20 | 江苏金石研磨有限公司 | A kind of ceramic grinding ball rolls shaping composite fortifier and preparation method thereof and its application method |
| CN108191413A (en) * | 2017-12-26 | 2018-06-22 | 北京建筑材料科学研究总院有限公司 | A kind of micro-crystalline ceramic mill ball and preparation method and application |
| CN109195929A (en) * | 2016-05-31 | 2019-01-11 | 株式会社白石中央研究所 | The manufacturing method of calcium carbonate sintered body |
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| CN102491735A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for producing aluminium oxide ceramic ball |
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2013
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Patent Citations (5)
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| CN101525230A (en) * | 2008-03-05 | 2009-09-09 | 邹平金刚新材料有限公司 | Formulation of microcrystal wear-resisting alumina ceramic |
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| CN102491735A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Method for producing aluminium oxide ceramic ball |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103468206A (en) * | 2013-09-23 | 2013-12-25 | 浙江湖磨抛光磨具制造有限公司 | Ultrafine grinding media for calcium carbonate powder and preparation method of ultrafine grinding media |
| CN109195929A (en) * | 2016-05-31 | 2019-01-11 | 株式会社白石中央研究所 | The manufacturing method of calcium carbonate sintered body |
| CN106747355A (en) * | 2016-12-15 | 2017-05-31 | 萍乡顺鹏新材料有限公司 | A kind of ceramic grinding body and preparation method thereof |
| CN106747355B (en) * | 2016-12-15 | 2018-06-22 | 萍乡顺鹏新材料有限公司 | A kind of ceramic grinding body and preparation method thereof |
| CN106747362A (en) * | 2017-03-06 | 2017-05-31 | 广州浩方节能科技有限公司 | A kind of ceramic grinding body and preparation method thereof |
| CN107814560A (en) * | 2017-09-30 | 2018-03-20 | 江苏金石研磨有限公司 | A kind of ceramic grinding ball rolls shaping composite fortifier and preparation method thereof and its application method |
| CN108191413A (en) * | 2017-12-26 | 2018-06-22 | 北京建筑材料科学研究总院有限公司 | A kind of micro-crystalline ceramic mill ball and preparation method and application |
| CN108191413B (en) * | 2017-12-26 | 2021-04-23 | 北京建筑材料科学研究总院有限公司 | Microcrystalline ceramic grinding ball and preparation method and application thereof |
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Application publication date: 20130626 |