1. Grinding Principles
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Centrifugal Force: During rotation, the grinding media (such as zirconia balls or alumina balls) and the materials are subjected to centrifugal force, moving along the inner wall of the drum.
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Friction Force: The friction between the grinding media, the materials, and the drum wall, as well as the collisions between media and materials, lead to crushing and grinding of the particles into finer sizes.
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Process: The continuous rotational motion causes the grinding media and materials to collide and rub against each other, achieving pulverization, homogenization, or mixing.
2. Grinding Media
Different grinding media are selected according to material properties and processing requirements, considering hardness, wear resistance, chemical stability, and cost:
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Zirconia Balls:
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High hardness and excellent wear resistance.
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Chemically stable, suitable for grinding chemicals, coatings, or high-value materials.
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Commonly used in precision grinding, such as ceramics and electronic materials.
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Alumina Balls:
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Slightly lower hardness than zirconia, but more cost-effective.
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Suitable for grinding ores, ceramic raw materials, or medium-hardness substances.
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Corrosion-resistant, applicable for chemical grinding.
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Stainless Steel Balls:
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Medium hardness with corrosion resistance.
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Suitable for grinding harder materials, such as ores or slags.
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Glass Beads:
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Lower hardness, suitable for softer materials or less demanding grinding processes.
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Cost-effective, commonly used for dispersing or lightly grinding coatings and pigments.
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3. Application Scenarios
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Chemicals: Grinding reagents or powders to achieve uniform particle size and improve reaction efficiency.
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Coatings: Milling pigments or fillers to nano- or micron-scale, enhancing dispersion and gloss of coatings.
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Minerals: Crushing ores for valuable component extraction or preparing mineral powders.
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Large-grain Slag & Furnace Residue: Grinding industrial by-products (such as blast furnace slag) into fine powder for use in cement, concrete, or other building materials.