The consumption of electricity of grinding mills in the dressing plant is considerable; it is about 30% to 70% of the total power consumption of the whole plant. Generally speaking, the electricity consumption can be divided into three aspects: 1.The useful energy consumption is used for the movement of the grinding medium. It is relate to the quality of the grinding medium and the ration speed of the cone grinding mills. This consumption is about 75% of the total power consumption of the whole plant. 2. The electricity loss of the motor itself is about 5%-10% of the whole power consumption. It is related to the efficiency of the motor. 3. The friction loss of machine. It is include the sound energy consumption, heat loss consumption and the rotation loss of the machine.

Ball mill is the key equipment to smash the raw material. It is widely used in cement, silicate products, and new building materials, refractory materials, fertilizer, black and non-ferrous metal processing and glass ceramics production industry. It can be used for the dry or wet grinding progress to grinding a variety of ores and other grind-able materials.

The ball mill is composed with the horizontal cylinder, hollow shaft and the grinding head. The long cylinder is equipped with grinding medium. Steel cylinder is fixed with steel liner. The grinding of steel generally spheres, according to different diameters and a certain percentage of loads, grinding media steel section can also be used.

According to the particle of the material, the material will enter into the cylinder through the hollow shaft which is on the feeding end. When the cylinder is turning, because the inertia and the centrifugal force, the material will be bring to a certain height and fall down via the action of gravity. During the dropping process, the material will be crushed in the cylinder.

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