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Aside from common ball mills there is a second type of ball mill called Planetary ball mill. Planetary ball mills are smaller than common ball mills and mainly used in laboratories for grinding sample material down to very small sizes. A planetary ball mill consists of at least one grinding jar which is arranged eccentrically on a so-called sun wheel. The direction of movement of the sun wheel is opposite to that of the grinding jars (ratio: 1:-2 or 1:-1 or else). The grinding balls in the grinding jars are subjected to superimposed rotational movements, the so-called Coriolis forces. The difference in speeds between the balls and grinding jars produces an interaction between frictional and impact forces, which releases high dynamic energies. The interplay between these forces produces the high and very effective degree of size reduction of the planetary ball mill.

In the cement plant, cement grinding mill and cement crusher are important equipment.

ball mill is the important equipment in coal crushing process, which is an efficient tool for grinding coal block into fine coal powder. SBM can supply many kinds of ball mills for coal crushing.

Cement ball mill: cement ball mill is mainly used to grind the clinker and raw materials in cement industry and also can be applied in metallurgy, chemical, electric power and other industries to grind all kinds of ores. Cement ball mill is not only suitable for over-flow grinding, but also applicable for cyclic close-flow grinding together with powder collector. There are three types of cement ball mills, small ball mill, cone ball mill and energy-saving ball mill.

Small ball mill: Small ball mill is smaller than the big ball mill, which features easy moveable, easy maintenance, small footprint and lower cost. There are two ways of grinding: the dry process and the wet process.

Cone ball mill: Cone ball mill is widely used in grinding clinker, carbonate, fireproof stuff , and chemical materials. Cone ball mill also can be used in beneficiation industry to grind the ores before selection.Henan bailing as a proffessional ball mill manufacturer,can provide high quality cone ball mill.

Energy-saving ball mill: Energy-saving ball mill has made a great improvement in the structure compared to the traditional ones. Its cylinder and supporting fame compose an integral system, thus, when it is being fixed, Energy-saving ball mill will be hung on the foundation once. Equipped with double-tiered centripetal roller bearing, its power consumption will be reduced by 30%. The intrinsic grill pattern forcing discharge is replaced by overall pattern controlling discharge, which enhances the fineness of final product, and meanwhile increase the capacity by 15-20%.

Cement crusher is the important cement crushing machine in cement production line. General it is used in cement mill. Big raw materials firstly are crushed by cement crusher, then appropriate raw materials dust enter into the cement mill for milling. Cement crusher used for crushing limestone, bauxite, gypsum, coal.

Except for grinding and crushing cement raw materials, cement ball mill and cement crusher such as limestone, gypsum, bauxite, cement clinker, impact crusher (impactor) is widely used in hydroelectricity, highway, artificial rock, stone, sand, building material, etc.