Descriptions:

Overflow type ball mill is a grinding machine that belongs to the category of ball mills. It is used to grind many kinds of materials into fine powder or small particles or to select the mine.

What Is an Overflow Type Ball Mill?

An overflow type ball mill is a grinding machine that belongs to the category of ball mills. The ball mill is used to grind many kinds of materials into fine powder or small particles or to select the mine, such as iron ore, gold ore, lead-zinc ore, nickel ore, etc. According to the discharging method, the ball mill can be divided into grate type and overflow type; according to the grinding method, the ball mill can be divided into the wet type and the dry type.

The main component of a wet overflow ball mill is a cylinder with a bigger diameter and smaller length which is revolved by transmitting machinery. Unlike a grate discharge mill, the overflow type ball mill allows the ground material to overflow from the mill through the trunnion. There are no screens or grates to hold back the particles, and the discharge is continuous.

What Is Overflow Type Ball Mill Used For?

CFTC overflow type ball mill is a type of grinding mill widely applied in various industries requiring fine grinding. Here are some specific uses of overflow type ball mill:

• Ore Grinding Plant

• Concentrator Plant

• Cement Clinker Grinding

• Mineral Processing

• Chemical Industry

• Building Materials

• Ceramic Production

• Glass Production

• Metallurgical Industry

• Waste Processing

What Are the Features of Overflow Type Ball Mill?

1. The structure is simple, and there are no complex grid plates at the discharge end.

2. The grinding fineness is fine, which is 10%~15% higher than machines of the same specifications.

3. The price of overflow type ball mills is lower than that of other types of ball mills.

4. The overflow discharge design is easier to construct, operate, and maintain.

5. The natural overflow design can reduce over-grinding, which is beneficial for the final product quality.

6. Body liners and grinding medium could be made of various of materials, with good corrosion resistance.

What Are the Parts of Overflow Type Ball Mill?

The basic components of an overflow type ball mill include the feeder, cylindrical shell, grinding media, feed device, discharge device, beaning, ring sealing, drive part, lifting device, coupling, motor, etc. Grinding media balls are made of steel, ceramic, or other materials.

In an overflow type ball mill, several parts are more susceptible to wear and tear due to the constant impact, abrasion, and mechanical stress. Here are the primary vulnerable parts: grinding media (grinding steel ball), lining plate, and bull gear. Regularly check can prolong the lifespan of a ball mill.

How Does Overflow Type Ball Mill Work?

Working principle of overflow ball mill: Driven by the transmission device, the cylinder rotates with the materials fed from the cylinder inlet and is crushed by the falling impacts and autogenous grinding of the steel balls and ores in the cylinder.

Due to the continuously feeding materials, the pressure pushes materials to the outlet, and the ground materials are discharged from the cylinder outlet. Qualified materials flow from the cylinder outlet. In wet grinding, the materials are taken out by the water flow. The hollow shaft has back pitch impellers, which can make the balls and coarse ores in the overflow return to the mill.