steel balls grinding media for cement ball mill
Grinding media – Ball mill balls

AGICO manufactures and supplies a variety of ball mill grinding media, including steel balls, short cylinders, and steel bars.

The ball mill mainly grinds materials by the grinding media in the grinding bin continuously impacting and extruding materials. Therefore, the grinding media is one of the most easily worn accessories of the ball mill during operation and needs to be replaced regularly.

For customers who have purchased our ball mill, we can provide the original grinding media of the ball mill at a preferential price. For customers who use ball mills of other brands, we can provide grinding media of various specifications according to your requirements or customize them according to your drawings.

Need High Quality Grinding Media for Ball Mill?

Why Choose Us

1. We are the source factory, can supply in large quantity with favorable prices;

2. With many years of production experience, we have developed mature manufacturing technology and our products have high qualities.

3. We can customize appropriate grinding media specifications according to the requirements of customers’ grinding materials and particle size;

4. Our grinding media have a wide range of applications and are suitable for ball mills of various specifications.

Grinding Media Types Available

Grinding media with different shapes and sizes achieve different grinding performances. AGICO supplies three types of ball mill grinding media.

1. Steel Balls

ball mill steel balls
Steel balls

Steel balls are one of the most widely used grinding media in cement ball mills, their diameters can range from 20mm to 150mm according to different grinding requirements. In a cement ball mill, generally, φ50-100mm steel balls are used in the coarse grinding chamber, φ20-50mm steel balls are used in the fine grinding chamber.

2. Short Cylinders

ball mill short cylinders
Short cylinders

Short cylinders are the grinding media having the cylinder shape. They can be used in the fine grinding chambers of ball mills in both open and closed circuit grinding systems.

The specification of short cylinders is expressed by the number of mm of diameter multiplied by length. The commonly used specifications are φ 15mm × 20mm, φ 18mm × 22mm, φ 20mm × 25mm, and φ 25mm × 30mm.

3. Steel Bars

ball mill steel bars
Steel bars

Steel bars are round steel rods cut into size. The steel bars used in ball mills are usually with diameters between 40mm and 90mm. The length of steel bars should be 50-100 mm shorter than that of the mill chamber.

Grinding Media Material

The grinding media in the ball mill is required to have great wear resistance and impact resistance. The material to make the grinding media must be hard, wear-resistant, and not easy to crack. Burr and crack are not allowed on the surface of grinding media, and the out of roundness of the steel ball shall not exceed 2% of its diameter.

The materials we use to manufacture grinding media used in cement ball mills are as follows:

1. High Chromium Cast Iron

High chromium cast iron is a kind of alloy white cast iron with high chromium content. It has good wear resistance, heat resistance, corrosion resistance, and good toughness. The wear resistance of a high chromium cast iron ball is 8-12 times that of a common carbon steel ball.

2. Low Chromium Cast Iron

Low chromium cast iron contains a small amount of chromium, which allows the white cast iron to obtain martensite metallography. The toughness of low chromium cast iron is slightly worse than that of high chromium cast iron, but it has good wear resistance. It is suitable for making small balls, short cylinders, and lining plates in the fine grinding bin.

3. Forged Bearing Steel

Forged bearing steel can be used to make steel balls of various diameters. Its carbon content is about 1.0%, chromium content is about 1.5%, and other elements are conventional content. The loss efficiency of forged bearing steel ball is higher than that of high chromium cast iron ball in practical use. However, due to its low alloy element content, it still has a broad market.

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