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Method for sintering microcrystalline alumina-toughened ceramic grinding ball

A low-temperature sintering and toughening ceramic technology, applied in the field of grinding media, can solve the problems of difficult sintering, easy abnormal growth, and material performance decline, and achieve the effects of improving production efficiency and product quality, low cost, and low wear

Inactive Publication Date: 2013-06-26
江苏金石研磨有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Microcrystalline alumina grinding media is a new type of grinding material newly developed in recent years. It has the advantages of high grinding efficiency and low wear, but the sintering temperature of the alumina matrix material is high (1500 0 C), sintering is difficult and the production cost is high
Moreover, the high sintering temperature makes it difficult to control the grain size of microcrystalline alumina, and it is easy to grow abnormally, resulting in a decline in material properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: a kind of method of low-temperature sintering microcrystalline alumina toughened ceramic grinding ball, comprises the following steps:

[0017] a The mass percentage is: 30% kaolin, 20% silica powder, 40% microcrystalline alumina as the matrix material;

[0018] b Take the mass percentage as: 2% calcium carbonate, 2.5% magnesium carbonate, 5% potassium carbonate, and 0.5% sodium carbonate as sintering aids;

[0019] c Mix the matrix material and sintering aid of the above ratio, and add water and grinding balls for ball milling;

[0020] d Obtain a uniformly mixed slurry after ball milling for 3 hours, and dry to obtain raw material powder;

[0021] e. The above raw material powder is molded by a ball rolling machine to obtain green green balls with a diameter of 0.2 mm to 13 mm, and the green green balls are sintered to obtain finished products.

[0022] The matrix material and the sintering aid are mixed: the ratio of water: grinding ball is 1:1.5:3. ...

Embodiment 2~8

[0024] Embodiment 2~8: with reference to embodiment 1, revise above-mentioned raw material proportioning, make table one, as follows:

[0025]

Embodiment 2

[0026] Example 2: The prepared microcrystalline alumina toughened ceramic grinding ball has a density of 2.7g / cm 3 , the Vickers hardness is 700Gpa, and the fracture toughness is 1.8 MPa. m 1 / 2 , When the diameter of the microcrystalline alumina toughened ceramic grinding ball is 4mm, its crushing strength is 700N, its self-abrasion is 2.0g / hr.kg, and the strip abrasion is 3.0g / hr.kg.

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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 [0001] The invention relates to a grinding medium, in particular to a preparation method of microcrystalline alumina toughened ceramic grinding balls. Background technique [0002] Grinding balls are widely used in mining, metallurgy, chemical industry, food, building materials and other industries to pulverize and mix raw materials through various methods such as collision, friction, rolling and extrusion of grinding balls. The quality of grinding balls seriously affects production efficiency and product quality. [0003] In recent years, the rapid development of ultra-fine powder technology and the development and utilization of low-grade minerals have greatly promoted the development and production of grinding ball media. Commonly used grinding media are steel, quartz, glass, alumina, zirconia, zirconium silicate, aluminosilicate ceramics, etc. Zirconia and zirconium silicate have good specific weight and performance, and are high-end grinding materials,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/36C04B33/13
Inventor 王俊甫李强王柏昆周雄宋书明廖建中
Owner 江苏金石研磨有限公司