Grinding and Grading Equipment Required In the Beneficiation Process

In the beneficiation process, different types of equipment such as a ball mill, a rod mill, a screw classifier, a flotation machine, a magnetic separator, a vibrating screen, and a dryer are used in many different types of equipment according to their needs. What we are talking about today is part of it - grinding and grading equipment. Grinding and grading equipment includes ball mills, rod mills, grinding machines, and classifiers.

In the beneficiation process, different types of equipment such as a ball mill, a rod mill, a screw classifier, a flotation machine, a magnetic separator, a vibrating screen, and a dryer are used in many different types of equipment according to their needs. What we are talking about today is part of it - grinding and grading equipment. Grinding and grading equipment includes ball mills, rod mills, grinding machines, and classifiers. We will explain in detail below.

First, lattice type ball mill

The specifications of the sub-type ball mills of various specifications are basically the same. The barrel of the ball mill is made by welding a steel plate with a thickness of about 18 to 36 mm. Both ends are welded with flanges made of cast steel. Liners are installed inside the barrel and manganese is used, steel, chrome steel, wear-resistant cast iron or rubber and other materials. The lining thickness is about 50-130 mm, and there is a gap of 10-14 mm between the barrel shells. Plywood, asbestos mats, or plastic poles or rubber are used to reduce the impact of steel balls on Simplified.

Second, overflow ball mill

The overflow type ball mill overflows because the ore is discharged by the paddle itself higher than the lower edge of the hollow shaft, and no additional heavy grid plate is required. In addition, in order to prevent the balls and coarse-grain nuggets in the ball mill from being discharged together with the pulp, anti-helical blades are embedded on the inner surface of the hollow journal bush.

Three, rod mill

Rod mills are classified into overflow type and open type. The former is more commonly used, and the latter is now stopped. The structure of the rod mill is approximately the same as that of the overflow ball mill, and the grinding media used is an oblong bar. Rod mills are available in both dry and wet versions. The user can choose according to his own situation.

Fourth, centrifugal mill

Centrifugal mill is a new type of high-efficiency ultrafine equipment, which is divided into vertical and horizontal types. According to the number of tubes, the former can be divided into single-tube and three-tube centrifugal mills.

Fifth, vibration grinding machine

Vibratory mills work at high frequencies, and high-frequency vibrations tend to produce cracks in the material, and can generate relatively high stress concentrations in the cracks, so it can effectively perform ultra-fine grinding. This kind of mechanical spring is easy to fatigue and damage, liner consumption is also larger, the use of smaller amplitude, the mine should not be too coarse, and requires uniform addition, usually suitable for grinding 1 to 2 mm of material to 85 ~ 5 microns .

Six, jet mill

Jet mill is a new type of dry grinding equipment that integrates fine grinding, grading, and drying of materials. It is mainly used in the chemical and construction materials industries, but it has recently been used for grinding.

Seven, spiral grading machine

Spiral classifier is used together with ball mill to complete grinding and grading with the equipment of wet ball mill. According to the number of spiral can be divided into single-screw classifier and double-screw classifier, according to the level of the liquid level, which can be divided into sorghum-style, immersed and low-boiled.

Eight, hydrocyclone

The upper part of the hydrocyclone is cylindrical, the lower part is conical, an overflow pipe is inserted in the center of the cylinder, and the upper part of the hydrocyclone has a tangential feed pipe, which is mainly used for fine-grained classification, slurry concentration, and removal dehydration of mud and so on.

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