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Easily molded toughened ceramic section for cement ball mill and preparation method thereof

A technology of toughening ceramics and cement balls, applied in the field of cement processing, can solve the problems of low hardness, insufficient strength, and poor high temperature resistance of the grinding body, and achieve the effects of high hardness, good bonding force, and long replacement cycle.

Inactive Publication Date: 2016-08-17
山东天汇科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent "A Method of Sintering Microcrystalline Alumina Toughened Ceramic Grinding Balls at Low Temperature" (application number: 201310109543.2, publication date: 2013-06-26) discloses a grinding body that also uses ceramics as raw materials. The patent A large number of kaolin and carbonate are used as sintering aids, and more silicon powder is used as a toughening agent. The high-strength ceramic component is only about 40%, and the hardness of the formed grinding body is relatively low, and the high temperature resistance is relatively high. Poor, the advantages of its invention tend to reduce the sintering temperature to improve production efficiency, while sacrificing part of the grinding performance. At the same time, the grinding body is only suitable for spherical shape, and it is difficult to withstand strong impact and grinding if it is processed into a ceramic segment; in addition, due to With the addition of a large amount of toughening and cooling additives, the strength is not enough. The optional forming diameter of the ceramic grinding ball can only be less than 10mm, which cannot meet the needs of large-scale ball mills.

Method used

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  • Easily molded toughened ceramic section for cement ball mill and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The easy-to-form toughened ceramic segment for the cement ball mill contains 92% of alumina, 0.5% of ferric oxide, 0.8% of kaolin, 2.5% of tungsten carbide, 2% of titanium dioxide, 1% of titanium carbide, and 1.2% of tantalum carbide by weight percentage. Prepared as follows:

[0033] (a) Batching: get all ingredients by weight percentage; configure PVA solution simultaneously, proportioning is PVA:water=8:100;

[0034] (b) Ball milling:

[0035] (b1) Primary grinding: Add the ingredients calculated in step (a) to the primary grinding equipment, and add ball stones and water (the primary grinding balls can be Φ30-Φ50mm 92-high alumina isostatic balls, the same below) , the ratio is material: ball: water=1:2.5:0.7, stop grinding to slurry fineness D90≤8 micron, cross 40 mesh sieves and go out grinding;

[0036] (b2) Fine grinding: Add the slurry obtained in step (b1) into the fine grinding equipment, and add ball stones and water (fine grinding ball stones can be 92-hi...

Embodiment 2

[0045] The easy-to-form toughened ceramic segment for the cement ball mill contains 95% of alumina, 0.5% of ferric oxide, 0.8% of kaolin, 1% of tungsten carbide, 0.5% of titanium dioxide, 1% of titanium carbide, and 1.2% of tantalum carbide by weight percentage. Prepared as follows:

[0046] (a) Batching: get all ingredients by weight percentage; configure PVA solution simultaneously, proportioning is PVA:water=7:100;

[0047] (b) Ball milling:

[0048] (b1) Primary grinding: Add the ingredients calculated in step (a) to the primary grinding equipment, and add ball stones and water in a ratio of material: ball: water = 1:2.5:0.75, until the slurry fineness D90≤8 Micron stop grinding, pass through a 40-mesh sieve for grinding;

[0049] (b2) Fine grinding: Add the slurry obtained in step (b1) to the fine grinding equipment, and add ball stones and water in a ratio of material: ball: water = 1:3:0.75, until the fineness of the slurry is D50≤1.5 microns 、Stop grinding after D90...

Embodiment 3

[0058] The easy-to-form toughened ceramic segment for the cement ball mill contains 92% of alumina, 2% of ferric oxide, 1.7% of kaolin, 2% of tungsten carbide, 0.5% of titanium dioxide, 0.8% of titanium carbide, and 1% of tantalum carbide by weight percentage. Prepared as follows:

[0059] (a) Batching: get all ingredients by weight percentage; configure PVA solution simultaneously, proportioning is PVA:water=10:100;

[0060] (b) Ball milling:

[0061] (b1) Primary grinding: Add the ingredients calculated in step (a) to the primary grinding equipment, and add ball stones and water in a ratio of material: ball: water = 1:2.5:0.72, until the slurry fineness D90≤8 Micron stop grinding, pass through a 40-mesh sieve for grinding;

[0062] (b2) fine grinding: add the slurry obtained in step (b1) into the fine grinding equipment, and add ball stones and water in a ratio of material: ball: water = 1: 2.5: 0.75, until the fineness of the slurry is D50≤1.5 microns 、Stop grinding afte...

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PUM

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Abstract

The present invention discloses an easily molded toughened ceramic section for a cement ball mill and a preparation method thereof. The easily molded toughened ceramic section for the cement ball mill comprises the following raw materials in weight percentage: 92-95% of alumina, 0.5-2% of ferric oxide, 0.8-3% of kaolin, 1-3% of tungsten carbide, 0.5%-2% of titanium dioxide, 0.8-1% of titanium carbide and 1-1.2% of tantalum carbide. The toughened ceramic section is in the shape of a cylinder, a ball-column connection body, a spindle or an egg. According to the technical scheme of the invention, the toughened ceramic section is prepared through the compression moulding and high-temperature sintering process. The preparation method comprises the steps of burdening, ball-milling, spray granulation, ageing in a stock bin, compression processing, high-temperature sintering, powder removing, polishing, finished product drying, and the like. The density of a prepared finished product is 3.6 to 3.9, and is only one half of the steel material. In this way, the effects of power conservation, energy conservation and carbon emission reduction are effectively realized. The toughened ceramic section is high in hardness, good in abrasion resistance, low in material consumption, good in economical efficiency, resistant to high temperature, good in toughness, not easy to break and collapse during impact, and good in practicability. The toughened ceramic section can work for a long time at a high strength. All the above components are well bonded under the effect of kaolin, and are easier to mold.

Description

technical field [0001] The invention relates to the field of cement processing, in particular to an easily formable and toughened ceramic segment for a cement ball mill and a preparation method thereof. Background technique [0002] The grinding section of the cement ball mill is the grinding material medium of the ball mill equipment. Through the collision and friction between the grinding sections of the ball mill, between the grinding section and the material, and between the grinding section and the lining plate, the grinding effect is generated, thereby further reducing the particle size of the material. The working objects of the grinding section are mostly cement, coal, ore, cinder, etc. Therefore, the hardness and wear resistance of the grinding section during use are one of the main factors affecting the shaping effect of the ball mill. The friction with the grinding segment is inevitable, therefore, the grinding segment is also required to have extremely high hardn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B7/52
CPCC04B7/52C04B35/10C04B35/622C04B2235/3232C04B2235/3272C04B2235/349C04B2235/3839C04B2235/3843C04B2235/3847Y02P40/10
Inventor 周俊华尹方勇王峰王征
Owner 山东天汇科技有限公司
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