How to choose the size, filling amount and ratio of alumina ceramic grinding balls

Alumina ceramic grinding balls have the characteristics of high strength, high hardness, high wear resistance, high specific gravity, small size, high-temperature resistance, corrosion resistance, iron-free, non-polluting, etc., and are widely used in ceramics, glazes, glass, etc. The grinding of non-metals is the grinding medium of ball mills, pot mills, vibration mills, etc. Its performance is significantly higher than that of pebbles.

Alumina ceramic balls are used for grinding in a ball mill.

When selecting a product, the type of grinding ball should be considered according to the incompatibility of the material and the Mohs hardness of the product. The hardness of the high alumina ceramic ball is 9, and the density is 3.6. g/cm³, in the wet milling process, when the filling amount of the balls reaches 55% of the net volume of the ball mill, the best state can be achieved. The weight of the balls in the ball mill can be estimated with an empirical formula. Stone loading amount = 3.14X the square radius of the ball mill X the specific gravity of the ball X the length of the ball mill X25%*1000

Regarding the gradation of the high alumina ceramic ball of the ball mill:

Due to the different grinding aids added to the ball mill, the above formula has also changed. Generally speaking, the initial ball stone gradation of the ball mill is: 30% for large balls, 40% for medium balls, and 30% for small balls. In practice, it mainly depends on the particle size of the material to be abrasive. The diameter and speed of the ball mill should also be considered properly. Wet ball mill The crushing of materials mainly relies on grinding instead of impact. Therefore, the number of large balls should be appropriately reduced, and medium and small balls should be used to ensure good grinding results. The load of the ball depends on the model of the ball mill, so the above rules are not suitable for the dry crushing process.

What matters should be paid attention to when the high aluminum grinding ball is installed and stopped?

The lining plates of each silo of the ball mill are basically made of metal. When loading the balls in the air mill, you should first load a certain amount of material (or bulk cement) to buffer, and then install the ceramic balls to avoid a height drop of more than 3m. Cause the ceramic ball to hit the steel liner, cause microcrack damage, and increase the damage rate of the ceramic ball during the production process. In addition, during the cement production process, if the grinding is stopped due to reasons such as production and maintenance, it is necessary to avoid long-term empty grinding operation without material to avoid damage to the high-aluminum ball, shorten the fill-up cycle and prolong the service life.

The above is how to choose the size, filling amount, and proportion of alumina ceramic grinding balls