Preparation method of high-strength ceramic material

A ceramic material and high-strength technology, applied in the field of ceramics, can solve the problems of reduced output, low compressive strength, and no power saving of tube mills, and achieve the effects of increased weight, high compressive strength, and easy breakage.

Inactive Publication Date: 2018-06-12
洛阳中伟环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Traditional dielectric balls, heat-resistant balls, and ceramic balls, whether they are pressed balls or rolled balls, are all molecular crystals, with low compressive strength and fragile
Especially in recent years, ceramic balls have been widely used in tube mills, and the ball breaking rate is very high, resulting in a substantial reduction in the output of tube mills and no power saving.

Method used

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  • Preparation method of high-strength ceramic material
  • Preparation method of high-strength ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 35% a-Al according to weight percentage 2 o 3 , 20% silica fume, 28% bauxite, 17% iron powder; mix it and grind it into a fine powder of 10μm, then add ammonia water with a mass concentration of 15% to it, mix well, press it into a spherical shape, and put it in the tunnel Calcined in the kiln at 1350° C. for 72 hours, and the high-strength ceramic balls were formed after the calcination was completed. The added weight of described ammoniacal liquor accounts for powdery raw material (a-Al 2 o 3 , silica fume, bauxite and iron powder) 70% of the total weight, silica fume adopts the silica fume produced in steelmaking. The specific gravity of the obtained ceramic ball is 5.0g / m 3 , its compressive strength is greater than 110KN.

Embodiment 2

[0027] Weigh 60% a-Al according to weight percentage 2 o 3 , 10% silica fume, 13% bauxite, 7% iron powder; mix it and grind it into a fine powder of 10μm, then add ammonia water with a mass concentration of 20% to it, mix well, press it into a ball shape and place it in the tunnel Calcined in the kiln at 1420° C. for 72 hours, and the high-strength ceramic balls were formed after the calcination was completed. The added weight of described ammoniacal liquor accounts for powdery raw material (a-Al 2 o 3 , silica fume, bauxite and iron powder) 50% of the total weight, the specific gravity of the resulting ceramic ball is 4.3g / m 3 , its compressive strength is greater than 110KN.

Embodiment 3

[0029] Weigh 87% a-Al according to weight percentage 2 o 3 , 5% silica fume, 3% bauxite, 5% iron powder; mix it and grind it into a fine powder of 10μm, then add ammonia water with a mass concentration of 25% to it, mix well, press it into a spherical shape, and put it in the tunnel Calcined at 1460° C. for 72 hours in the kiln, and the high-strength ceramic balls were formed after the calcination was completed. The added weight of described ammoniacal liquor accounts for powdery raw material (a-Al 2 o 3 , silica fume, bauxite and iron powder) 35% of the total weight, the specific gravity of the resulting ceramic ball is 3.8g / m 3, its compressive strength is greater than 110KN.

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Abstract

The invention relates to a preparation method of a high-strength ceramic material. The preparation method includes the steps: weighing 35-95% of alpha-Al2O3, 1-35% of silica fume, 3-35% of bauxite and1-50% of iron powder in weight percent; mixing and grinding materials into 1-100 micrometer fine powder, adding a nitrogen-containing compound into the fine powder, uniformly mixing the fine powder with the compound, pressing or rolling the mixture by a 600 tons / cm<2> press machine, and calcining the mixture in a calcining kiln for 8-72 hours at the temperature of 1350-1500 DEG C to finally formthe high-strength ceramic material containing silicon nitride and silicon micro-crystals. The method can be used for preparing high-strength wear-resistant ceramic balls, the high-strength wear-resistant ceramic balls have the advantages of light weight of ceramics and high strength and wear resistance of steel balls and are used for replacing traditional common ceramic balls or steel balls in a tube mill, on one hand, the high-strength wear-resistant ceramic balls are not easily broken, on the other hand, power consumption is reduced, electricity can be saved by 16 billion kilowatts only in acement industry, and the service life of the tube mill is greatly prolonged as the specific weight of the high-strength wear-resistant ceramic balls is smaller than that of the steel balls.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a preparation method of a high-strength ceramic material. Background technique [0002] The production of ceramic balls in the traditional ceramic industry generally uses a mill to grind bauxite, kaolin, feldspar and mullite into powder, then press or roll them into balls by machine, and then calcine them into ceramic balls. These ceramic balls are sintered at low temperature, and the composition of traditional ceramic balls is formed by molecular force structure. Ceramic crystal materials connected by this molecular force method are brittle and have low compressive strength. [0003] Non-metals are generally composed of molecular crystals or covalent bond crystals (except for diamond, ruby, and emerald. Diamond is an atomic crystal, and ruby ​​and emerald are composed of ionic bonds.) Therefore, the compressive strength is low and fragile. Metals are generally composed of ato...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
CPCC04B35/10C04B35/62204C04B2235/3873C04B2235/405C04B2235/428C04B2235/77C04B2235/96
Inventor 葛中伟骆虹伟郭瑞军孙小超李俊征
Owner 洛阳中伟环保科技有限公司
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