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Inert Alumina Ceramic Ball Production Method
Alumina ceramic balls are widely used in building sanitary ceramics, industrial ceramics, electronic ceramics, high-grade refractory materials, special cements, non-metallic minerals and coatings due to their high hardness, high density, wear resistance, corrosion resistance and low price. Grinding and processing of raw materials in industries such as paint. Alumina ceramic balls are used as grinding media, and wear resistance is the most important indicator for evaluating the quality of alumina ceramic balls.
Chinese patent CN 1931784 B discloses a formulation of a high-temperature wear-resistant alumina ceramic tube, which is improved by 800-90 (TC high-temperature high-speed oil jet erosion wear resistance and cold and heat rapid change performance by adding silicon carbide. General situation Under, the use temperature of alumina ceramic balls is not so high, the high temperature wear resistance above 800 °C is not important for porcelain balls, so it is not necessary to add expensive silicon carbide to the ceramic balls, and after adding silicon carbide The ball bulk density is significantly reduced, which will reduce the milling efficiency of alumina ceramic balls.
Chinese patents CN 101525230A and CN 101525231A respectively disclose a formulation of microcrystalline wear-resistant alumina ceramics and a process for preparing microcrystalline wear-resistant alumina ceramics by introducing a composite additive polyvinyl alcohol and sodium tripolyphosphate into the formulation. The deagglomerating agent reduces the size of the alumina crystal grains to improve the bending strength and hardness of the alumina composite ceramic. In fact, polyvinyl alcohol is an organic substance, and the size of alumina crystal grains is not reduced during high-temperature firing, and sodium tripolyphosphate may also lower the performance of ceramics by introducing sodium ions.
Under the condition that no expensive raw materials such as silicon carbide, rare earth or zirconia are added, the alumina ceramic balls excellent in wear resistance are obtained by a conventional method, and a lot of detailed research work is still required.
Chinese patent CN 1931784 B discloses a formulation of a high-temperature wear-resistant alumina ceramic tube, which is improved by 800-90 (TC high-temperature high-speed oil jet erosion wear resistance and cold and heat rapid change performance by adding silicon carbide. General situation Under, the use temperature of alumina ceramic balls is not so high, the high temperature wear resistance above 800 °C is not important for porcelain balls, so it is not necessary to add expensive silicon carbide to the ceramic balls, and after adding silicon carbide The ball bulk density is significantly reduced, which will reduce the milling efficiency of alumina ceramic balls.
Chinese patents CN 101525230A and CN 101525231A respectively disclose a formulation of microcrystalline wear-resistant alumina ceramics and a process for preparing microcrystalline wear-resistant alumina ceramics by introducing a composite additive polyvinyl alcohol and sodium tripolyphosphate into the formulation. The deagglomerating agent reduces the size of the alumina crystal grains to improve the bending strength and hardness of the alumina composite ceramic. In fact, polyvinyl alcohol is an organic substance, and the size of alumina crystal grains is not reduced during high-temperature firing, and sodium tripolyphosphate may also lower the performance of ceramics by introducing sodium ions.
Under the condition that no expensive raw materials such as silicon carbide, rare earth or zirconia are added, the alumina ceramic balls excellent in wear resistance are obtained by a conventional method, and a lot of detailed research work is still required.
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