Peculiar Features and Application of Overflow Ball Mill

According to the different ore discharging method, ball mill grinders can be divided into lattice ball grinder and overflow ball mill which is the most widely used ore grinder in the current iron ore concentration plant. Inside the cylinder of overflow ball mill, a certain amount of steel balls are loaded as the ore grinding medium. Materials are crushed and grinded by the steel grinding balls and then discharged out of the machine through the hollow shaft neck at the ore discharging end. As the ground products are overflowly discharged from the hollow shaft neck, this type of ball mill machine is called overflow ball mill which is widely used in various industries.

An overflow ball mill machine is mainly composed of cylindrical cylinder, end cap, bearing and driving gear ring. The internal cylinder is covered by wear-resisting lining boards fastened with bolts. Inside the cylinder, there are grinding media which are usually steel grinding balls. When the main motor drives, the internal steel balls will stick onto the lining boards and rotate with the cylinder under inertia, centrifugal force and frictional force. After being brought to a certain height, under the gravity, the steel balls will fall down. The falling steel balls will form fierce impact force on the ores. In the meantime, steel grinding balls will rotate around the cylinder axis and produce squeezing and grinding force on the ores among the steel balls and in the contact area of the cylinder, thus crushing and grinding the ores to complete the grinding process.

Overflow ball mill is a crushing mill working under the wet state. The biggest difference from the dry type ball mill is that the end cap is taper type, and on the end cap, there is only one crest lining board. The overflow ball aking machine produced by Henan Hongxing Mining Machinery Co., Ltd. adopts high-quality lining board made of high manganese, with high wear resistance, low noise and high working efficiency. The biggest advantage of Hongxing overflow ball mill is that it is able to separate low-grade magnetic iron ore with high precision, choose any granularity and get rid of coarse tailings at any time. This equipment has low investment and quick effect. It is mainly used in industrial production, especially in the ore beneficiation industry.