Grinding balls and production method thereof

A production method and technology for grinding balls, which are applied in the production of ceramic materials, grain processing, zirconia, etc., can solve the problems of expensive, undisclosed, technical difficulties, etc.

Inactive Publication Date: 2007-02-21
MAGOTTEAUX INT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0044] All grinding balls containing silica, alumina or zirconia have the characteristic of being produced by fusion, which requires reaching temperatures above 2000°C, which is technically difficult and therefore expensive
On the contrary, none of these documents discloses grinding balls made of sintered ceramics containing silica, alumina and zirconia

Method used

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  • Grinding balls and production method thereof
  • Grinding balls and production method thereof
  • Grinding balls and production method thereof

Examples

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Embodiment Construction

[0082] The present invention relates to balls made of sintered ceramics comprising alumina-zirconia-aluminosilicate, especially alumina-zirconia-mullite. The quality of these balls is higher than that of balls made of alumina, aluminum silicate or alumina-zirconia, and their cost is significantly lower than that of zirconia balls which are very expensive and are used especially as abrasive and / or dispersion media .

[0083] More specifically, the invention relates to balls made of sintered ceramics having the following chemical composition in % by weight:

[0084] -5-40% ZrO 2 +HfO 2 , preferably 9-25%,

[0085] -0.1-10%Y 2 o 3 , preferably 0.5-3%,

[0086] -0.5-20% SiO 2 , preferably 5-12%,

[0087] -40-90%Al 2 o 3 , preferably 60-85%,

[0088] where ZrO 2 / SiO 2 The ratio is greater than or equal to 2, preferably equal to 2,

[0089] -0-5% optional oxide (Na 2 O, CaO, MgO, BaO, ...).

[0090] These balls can be formed by starting from a slurry and / or paste of...

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Abstract

The invention relates to sintered ceramic grinding balls comprising the following compounds (by wt.-%): 18 to 50 wt.- % mullite (3Al2O3.2SiO2); 9 to 25 wt.- % zirconium (ZrO2 + HfO2) stabilised by 0.5 to 3 wt.- % rare earth oxide; and 25 to 72 wt.- % alumina (Al2O3).

Description

technical field [0001] The present invention relates to the grinding of inorganic or organic materials, and in particular to abrasive or other types of spherical sintered ceramic balls used in agitated mills for particle reduction, dispersion and regeneration. Background technique [0002] Devices and methods for fine grinding and dispersion by dry and wet methods are well known to those skilled in the art and have been developed in many industries, such as: [0003] - mining, fine grinding of pre-crushed particles by means of conventional methods; [0004] - Paint, ink, lacquer and agrochemical industries, as well as industries for the dispersion and homogenization of liquid and various solid components. [0005] For the most part, these devices and methods use substantially spherical and small diameter (typically less than 10 mm) dispersed material or abrasives. [0006] In the mining industry, fine and ultra-fine grinding has recently become an important development pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/106B02C15/00B02C17/20C04B35/119C04B35/185
CPCC04B2235/3418C04B35/6261C04B2235/3206C04B35/6303C04B2235/3201C04B2235/3215C04B2235/3463C04B2235/3208C04B2235/80B02C17/20C04B35/185C04B2235/3246C04B2235/94C04B35/119C04B2235/3225Y10T29/49712Y02P40/60B02C17/24C04B35/106C01G25/02
Inventor L·鲍朗格S·德西尔斯
Owner MAGOTTEAUX INT SA
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