Ball Grinding Machine2019-06-25

Abstract

Comparison of Ball Grinding Machine types Ball Grinding Machine is the key equipment of crushing materials. This is the grinder currently used in the concentrator. According to different mining methods, the Ball Grinding Machine can be di…

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Comparison of Ball Grinding Machine types

Ball Grinding Machine is the key equipment of crushing materials. This is the grinder currently used in the concentrator. According to different mining methods, the Ball Grinding Machine can be divided into point array Ball Grinding Machine and overflow Ball Grinding Machine. So what’s the difference between the two Ball Grinding Machines?

Similarities

1. The structure is basically the same

The structure of the two Ball Grinding Machines is basically the same. They are mainly composed of cylinder block, ore supply department, ore discharge part, bearing part, transmission part and lubrication system.

2. Similar workflow

During operation, after the ore is fed into the cylinder, the cylinder will rotate around the horizontal axis at the specified speed. At the same time, the ore will be rushed in or thrown freely due to the friction of centrifugal force and grinding medium, thus it will be impacted, and it will be crushed by grinding and peeling, and the products after grinding will be discharged through the discharge part.

Difference

1. The structure of the mine discharge sector

The basic structure of the two is the same as the pulverizing process, but the structure of the mining sector is different.

The grid side of the grid Ball Grinding Machine is equipped with a grid lining plate, and a grid plate is arranged at the discharge end, and a plurality of discharge holes are arranged on the grid plate. The milled pulp is lifted to a height higher than the discharge port through a lattice liner and a fan-shaped cavity leading to the discharge port, so as to discharge the pulp from the grinder.

There is no grid lining on the discharge side of the overflow Ball Grinding Machine, but on the inner surface of the hollow journal bushing at the discharge end, a spiral blade with the screw direction and rotation direction of the mill is arranged to prevent the water ball. Or discharge the coarse ore block together with the slurry. The overflow of overflow type Ball Grinding Machine flows by slurry itself, which is higher than the lower edge of hollow journal bushing. Machine reason).

2. Discharge particle size

The upper limit of the particle size of the grinding products of the grating type Ball Grinding Machine is usually 0.2 to 0.3 mm, so it is often used in the first stage of grinding and often forms a closed-circuit cycle with the spiral classifier.

The size of grinding products of overflow Ball Grinding Machine is usually less than 0.2mm, which is suitable for regrinding of concentrate and can obtain finer qualified products.

3. Discharge mode

The grid type Ball Grinding Machine is discharged through the sieve plate, and the overflow type Ball Grinding Machine automatically overflows the material. When the material height is higher than the discharge port, the material will be discharged automatically.

4. Production capacity

The working characteristics of the intermittent Ball Grinding Machine are mainly forced discharge and high production capacity. The mill is in the first stage of grinding operation and can obtain higher processing capacity, but the particle size of the product is coarser than that of the overflow mill.

5. Grinding effect

When the ball is raised to a certain height and retreated, the relatively lower pulp surface has a larger falling height, so the impact on the steel ball is better in material. Strong, the crushing effect of mineral materials is large, and the grinding effect is better.

6. Over lapping phenomenon

The lattice type and fan-shaped indoor lifting bucket of the lattice Ball Grinding Machine realize low level forced discharge. The finely ground ore particles are left in the Ball Grinding Machine and discharged in time, thus reducing the crushed stone. Comminution phenomenon.

Overflow type Ball Grinding Machine belongs to non compulsory high discharge, which has slow discharge speed, long time for minerals to stay in the machine and serious over grinding phenomenon.

7. Maintenance difficulty

In contrast, the overflow type Ball Grinding Machine is simple in structure and convenient in maintenance. The grid type Ball Grinding Machine structure is easy to block the grid plate in work and complex in maintenance.

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