How to make sure the quality of grinding balls?

The grinding steel balls or steel balls are a material grinding media of ball mill and coal mill. It has an important position in national economy like mineral processing,power station and cement plant.
Our company is a professional manufacturer and exporter of grinding balls in China, which has steel ball automatic production line.
When deciding on grinding steel balls, their density and hardness are two factors that cannot be ignored.
1. the density of steel balls on ore grinding.
Generally speaking, about the issue in the similar dimension.The bigger the density on the steel balls, the increased the productivity of ball mills might be.
2. the hardness of steel balls on ore grinding.
In order to the enhance of the hardness,the steel balls ought to be appropriate with the ball mill and the materials.