How to adjust the fineness of the mine ball mill

The ball mill is a common grinding equipment in mineral processing in mines. The fineness of the ball mill directly affects the pass rate of the product, so it is very important to master the method of adjusting the fineness.This article will introduce you to several common methods for adjusting the fineness of ball mills.

Factors affecting the fineness of the ball mill

Since the fineness of grinding is so important, before we understand how to control the fineness, we must first understand the main factors that affect the fineness of grinding.There are the following factors that have a greater impact on fineness：

1.Types of ball mills: Different types of ball mills (such as overflow type, lattice type, rod mill, etc.) have different effects on the grinding effect and fineness of ore.

2.Grinding medium: The type of grinding medium (such as steel ball, steel rod, etc.), size, ratio and filling rate will affect the grinding effect.

3.Grinding time: The longer the grinding time, the finer the ore, but too long grinding time will increase energy consumption.

4.Ore feed particle size: The size of the ore feed particle size directly affects the grinding effect. The larger the particle size, the longer the grinding time, and the more difficult it is to control the fineness.

5.Ore feed volume: The size of the ore feed volume will affect the filling rate and grinding effect of the grinding medium.

6.Grinding concentration: If the grinding concentration is too high or too low, it will affect the grinding effect and fineness of the ore.

Method of fineness adjustment of ball mill

1. Adjust the grinding medium

Change the type of medium: choose the appropriate type of grinding medium according to the nature of the ore and the grinding requirements.

Adjust the size of the medium: use different sizes of grinding media to adapt to different grinding stages and fineness requirements.

Optimize the media ratio: reasonable ratio of large, medium and small balls to improve grinding efficiency and fineness.

Adjust the filling rate: Adjust the filling rate of the grinding medium according to the grinding requirements to control the grinding effect.

2. Adjust the grinding time

The rationality of the grinding time plays a decisive role in the fineness of the grinding. We can appropriately extend or shorten the grinding time so that the fineness of the grinding can be controlled.For ores that require finer particles, the grinding time should be appropriately extended.The regulation of grinding time can be solved by adjusting the grinding cycle load.

3. Adjust the ore feed particle size and ore feed volume

The particle size of the ore feed can be said to be the foundation of the problem. In the same grinding time, if the particle size of the ore feed is small, the particle size of the ground product will be finer. In addition, by controlling the amount of ore feed, the ball mill can also exert its greater efficiency and grind the ore finer.

4. Adjust the grinding concentration

Appropriately increasing the grinding concentration can improve the filling rate of the grinding medium and improve the grinding efficiency.Control the stability of the grinding concentration and avoid the grinding concentration being too high or too low to ensure the grinding effect.

5. Use grinding aids

In some cases, grinding aids can be added to improve the grinding effect and improve fineness.