3. Touch with your hand. The surface is smooth, not rough, and of good quality. The heavier the quality, the higher the alumina content.

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2. Look for any indentation. If there are indentations, they are pressed into shape with high strength; If there are no indentations, it means poor rolling strength.

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There are many manufacturers producing alumina balls in the market, and the quality is also uneven. So how to distinguish the quality of alumina balls? Next, the editor will briefly introduce it.

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2. Wear resistance: The more important quality of ball stones is wear resistance. Some testing institutions can also conduct wear tests. These test reports can display the quality of the pebbles, but the data is for reference only, as the environmental conditions for laboratory testing are very different from those for production. The experiment is done by water grinding, while many manufacturers use dry grinding; Secondly, in many cases, no other raw materials are added, only the friction between the pellets is added, and various raw materials are added during the actual production process.

The above is the editor's answer to this question. In practical use, more records are needed to detect the wear of the ball stones. After the initial mixing ratio, the cost of alumina balls is compared with other grinding balls by recording the number of balls added and calculating the wear of ball stones in production based on production output, and the quality of ball stones from different manufacturers is compared. In addition to the hardness and fineness of the feed, there are also factors such as the grinding method (dry and wet grinding are different), the speed of the ball mill, whether the feed ratio is reasonable, and the viscosity of the feed.

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1. Specific gravity: Taking an alumina ball with a content of 92% as an example, its specific gravity (density) should be above 3.60, and the alumina content should be above 92%. Under the same raw materials, formula, and firing temperature, the smaller the fineness, the higher the specific gravity, and the better the wear resistance.

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