In the ball mill operation, the steel ball occupies the main role. It is the medium of the ball mill to abrasive the material, and the collision friction between the steel ball and the material is ground between the ball mill steel ball. So about steel ball, how much do you know? The following small series will briefly introduce the steel ball of the ball mill.
First understand the classification of steel balls, according to the material, the steel ball has two main types:
1. Forged steel ball: using round steel as a raw material After heating and high temperature forging. Good surface quality, good impact, strong toughness, good wear resistance, not easy to break, and wound.
2. Cast steel ball: use scrap slag as a raw material, adding chromium iron and other alloys, mold casting. High-chromium cast balls are excellent, and it is a high-quality wear-resistant material that has been widely used in the cement industry dry ball mill, but high chromium cast balls are poor, and it is easy to break in a ball mill having a diameter greater than 3 meters, and The price is higher.
Steel ball diameter requirements: The discharge of the ball mill is not only affected by the steel ball loading, but also related to the diameter of the steel ball. The ball is required to maintain a certain proportional relationship, and the size of the inner spherical diameter of the general cylinder is in the general cylindrical range of 25-60 mm. The size of the steel ball is selected, and there is a certain relationship with the volume of the inner unit volume material.
The effect of casting process on steel ball: The manufacturing process of steel balls is also a key factor in determining its service life. If there is a defect in the surface or inner manufacturing of the steel ball, such as shrinkage, crack, pendant, etc., not only reduce steel ball performance, but will even cause steel ball to break. Therefore, reasonable forging, casting and heat treatment processes must be developed in steel ball production.
