Ball Mill Lining Ceramic Linings

Ball Mill Lining Ceramic Linings – Mill cylinders are made from two different ceramic formulations, one having silicon oxide as the dominant material and the other having aluminum oxide as the dominant material. These differences in oxide content allow some choice to be made with respect to the most acceptable wear-off. Comparative laboratory tests show that the high alumina composition is at least 25 to 100 percent more resistant to impact abrasion than is the more siliceous composition, very low wear rates with only trace amounts of alumina. Rubber – Special abrasion resistant low-ash rubber linings have been developed for milling of contaminant-sensitive materials. Batch contamination is reduced to such a low lever that spectrographic analysis is the only quality control technique that can measure the negligible inorganic contamination introduced into the batch from the lining. Because of the resiliency of rubber, which contributes to the abrasionresistance of the lining, negligible wear-off is produced and no appreciable quantity of organic material is found I milled products. Subsequent ignition of ground material in an oxidizing atmosphere removes the rubber worn off into the batch, leaving only a trace amount of oxide contamination. Colloidal carbon will remain it the batch is fired in a neutral or reducing atmosphere. Low-ash rubber has been utilized successfully in mill jars and large production mills for either wet or dry size reduction of alumina, steatites, titanates, zirconates, ferrites, nuclear ceramics, high temperature refractories, and other material whose end properties might be altered by alumina or porcelain wear-off. Polyurethane – a polyurethane lining has the greatest abrasion resistance and the highest tensile and tear strength of any synthetic rubber. It provides a unique combination of toughness, resilience, and load bearing properties. Polyurethane affords excellent resistance to oils, greases, and fuels and is unaffected by oxygen, ozone, and weathering. It can be used in service with aqueous salt solutions, dilute mineral acids and greases, aliphatic hydrocarbons and other non-polar organic compounds. Metal - Mill cylinders made with abrasion-resistant steels and other metals are satisfactory where metallic contamination is not important or where further treatment will be undertaken to remove the metal particles. Since faster grinding rates are typical with steel ball mills, more economical production will be the result. All but the finest white and pastel paints can be milled in a steel lined unit, and steel is definitely recommended when milling ceramic ferrites in both solvent and water dispersions. Many types of inks, carbon paper coatings, wax compounds, rubber compounds, and even food stuffs can be milled in the faster possible time in steel ball mills

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