The difference between grid ball mill and overflow ball mill
Date:2022-06-24 11:10:12
Author:admin
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168
The ball mill is the key equipment for the material to be crushed and then crushed. According to the different discharge methods, ball mills can be divided into grid type ball mills and overflow type ball mills. Users should choose according to the technological process and needs.
1. The structure is similar.
The structure of the two types of ball mills is basically the same, mainly composed of a feeding device, a main bearing device, a rotating part, a gear cover, a discharging device, a transmission device and a lubricating part.
2. The workflow is similar.
During operation, after the feeding device is fed into the cylinder, the cylinder will rotate around the center line of the cylinder at a specified speed, and at the same time, the ore will freely fall or drop through the centrifugal force and the frictional force of the grinding medium, thus being impacted and thrown away. Grinding and peeling action are ground, and the ground products are discharged through the discharge device.
3. Different ways of discharging.
The discharge end of the grid-type ball mill is equipped with a discharge grate, and the ground material passes through the discharge grate and is lifted by the lifting plate into the discharge screw, so that the material is discharged from the mill. Usually contains a discharge hood.
The discharge end of the overflow type ball mill (usually used for wet operation) is not equipped with a discharge grate, but on the inner surface of the hollow shaft bushing at the discharge end, a screw with a helical direction opposite to the rotation direction of the mill is installed. The purpose of the blade is to prevent the water ball or coarse material from being discharged together with the pulp. The discharge of the overflow ball mill is automatically overflowed by the pulp itself being higher than the lower edge of the hollow shaft bushing.
4. Production capacity and product fineness.
The working characteristic of the grid type ball mill is mainly forced ore discharge, so the production capacity is higher, but the product particle size is coarser than that of the overflow type ball mill.
When the material of the overflow ball mill is higher than the discharge port, it will overflow automatically, so the discharge particle size is finer, but the production capacity is low.
5. Difficulty of maintenance.
In contrast, the overflow type ball mill has a simple structure and is easy to maintain, while the structure of the discharge end of the grid type ball mill makes it easy to block the grid plate during operation, and the maintenance is complicated.
The two types of ball mills have their own characteristics in terms of use and performance. Users should clarify their own production requirements in order to choose the most suitable type of ball mill.
