Vertical mill and ball mill are the first equipment people think of when choosing mill equipment, but what exactly is the difference between the two, and how do we choose it!

Vertical mill

1, in terms of grinding efficiency

Vertical mill efficiency is the combination of grinding, grading and drying (when the material moisture is large), all in one. Vertical mill adopts material bed grinding principle to grind materials, 30% lower than the ball mill system. Therefore, in terms of grinding efficiency, vertical mill is better than ball mill.

And the vertical mill adopts hot airflow conveying materials, in grinding materials with relatively large moisture (such as coal, slag, etc.) can control the temperature of the inlet air, the vertical mill can dry materials with moisture 12-15%; even if it is a drying ball mill, it can only dry materials with moisture 3-4%; this not only saves the economic cost, but also saves the cost of time.

2、In terms of energy consumption

In the case of the same raw material abrasiveness and product particle size, the power energy consumption of vertical mill can be reduced by 30%~50% than that of ball mill.

3、In terms of process flow

Compared with the ball mill, the process of vertical mill is relatively simple, and the infrastructure investment is small. Vertical mill through the separator, the direct use of hot airflow conveying materials. This saves the cost of powder selector and elevator.

The dusty gas out of the mill is directly collected into the powder collector, so the vertical mill system has a simple process, a low failure rate, a high operating rate, a compact layout, a building area of 70% of the ball mill, and a building space of 50-60% of the ball mill; low investment costs.

4, the quality of the product

Compared with ball mill, the product of vertical mill has high degree of homogenization and higher purity. This is because when the vertical mill is working, the time used to classify the finished powder is short, avoiding over-grinding.

In addition, due to the unique working principle of vertical mill, vertical mill in the operation process, no metal direct contact with each other, metal wear and tear is small, the pollution of the finished material is small.

Vertical mill grinding adjustment of the separator speed, wind speed and grinding roller pressure is very convenient, to achieve convenient adjustment of product fineness.

Ball mill is easy to over-grinding, limestone unit grinding consumption is generally 4-6 g / ton, ball mill up to 500 g / ton. The effect on the whiteness of white minerals when grinding them is much smaller than that of the ball mill.