Grate discharge ball mill is designed to crush and grind various ores and other materials.

Working principles
The transmission device drives the shell to rotate. After materials and water are fed into the shell, the size of the materials is reduced by the impact of the steel balls and ores that drop from the feeding end. The continuous feeding compels the materials to move from the feeding end to the discharge end.

Advantages
The grate discharge ball mill can forcibly discharge the ground materials and ore slurry to avoid overgrinding. Compared with a overflow ball mill of the same size, the grate discharge ball mill is more capable of processing more coarse materials. The processing equipment's adoption of rolling bearings reduces the energy consumption for starting it and makes the maintenance easy.

• The transmission device adopts big double-row spherical rolling bearings and hybrid bearings, substantially decreasing the friction force, enabling an easier starting and reducing the energy consumption by 20% to 30%.
• The adoption of grooved ring high manganese steel liners increases the contact surface between the balls and the ores to strengthen the grinding, reducing the energy consumption.
• The ball mills with a diameter under 2.7 meters can adopt steel frames to benefit the modular plant design, civil engineering constructions and equipment installation.
• A large discharge outlet boosts the production capacity.
• The ball mills can be equipped with a high-voltage or low-voltage electric motor and deploy high manganese steel or wear-resistant rubber liners according to users' site conditions and demands. The customers can also choose the brand of motor and reducer which are installed in a ball mill.
• The ball mills adopting hybrid bearings are also equipped with hydraulic jacks to make it convenient for installation and overhauling.
• Stable and reliable operation and performance.
• The ball mills with a large diameter are equipped with the slow-speed transmission device, enabling inspection and operation.
• The oil-mist lubrication device ensures the gears' reliable and smooth function.

The grate-discharge type ball mill is used for preliminary grinding or grinding ores of less than 70% of minus 200 mesh.

As one type of the most common mining equipments, ball mills are widely used in mineral processing, construction and chemical industries and for acquiring silicate and other processed ores. In general, the ball mills are used by small, medium and large-sized mineral processing companies to crush and grind ores, including gold, silver, copper, lead, zinc, nickel, manganese, iron and molybdenum, as well as limestone, barite, quartz, graphite, feldspar and fluorspar.