The new mineral sizer crusher is a kind of crushing equipment appeared abroad in recent years. Compared with other types of crusher, it has the advantages of light weight, small volume, low power consumption, high productivity, uniform discharge particle size and so on. It is especially suitable for the crushing station of open-pit mine and the gravel crusher for highway construction. At present, the domestic demand for this equipment is large, because the introduction price is expensive, so the technology digestion and absorption of it has become an urgent task. Based on the analysis of the crushing and discharging mechanism of mineral sizer crusher, the formula for calculating the production capacity of the mineral Sizer crusher is deduced for the first time, and the determination method of the power of the prime mover is put forward.
The main working parts of mineral sizer crusher are two parallel mounted tooth rollers, each of which is arranged with a certain number of tooth rings along the axial direction to realize the crushing of materials through the rotation of tooth rollers. The action of teeth on materials can be divided into three stages. In the first stage, the teeth of the roller in the rotating motion meet the large material, and the impact shear is carried out on it first, followed by tearing. If the fragment can be bitten by the roll teeth, it will enter the second stage of crushing. Otherwise, the roll teeth will slide forcibly along the surface of the material, and the spiral arrangement of the roll teeth will force the material to turn over and wait for the continued action of the next pair of teeth. This stage is the tooth from 1'-1 position to 2'-2 position. The second stage begins with the material being bitten and ends with the first pair of teeth disengaging, which is manifested as the tooth moving from 2'-2 position to 3'-3 position. At this stage, the section of the two teeth contained gradually changed from large to minimal, and then increased again. As the containing volume of the large particle size gradually decreases, it is forced to squeeze and shear the broken material is extruded and leaked from the clearance of the tooth side.
When the first pair of teeth begin to disengage. A large number of broken materials are leaked out, and individual materials with large particle size are blocked by the splitting bar. When the teeth move to the vicinity of the splitting rod, they act together with the splitting rod to split the large material and force it out, which is the third stage crushing. At this point, the crushing process of a pair of teeth is over. The number of teeth on each pair of tooth ring, tooth roller running a week when the same process is carried out many times, the cycle repeats. Production capacity Calculation of mineral sizer crusher Production capacity is an important index of mineral sizer crusher performance. It is directly related to the selection of parameters in the design of mineral sizer crusher, such as the determination of power, and is also an important basis for user selection. Therefore, it is very important to determine the production capacity of mineral sizer crusher. According to the crushing and discharging mechanism of mineral sizer crusher, mineral sizer crusher has the characteristics of forced bite and forced discharge, which is different from the general roll crusher, so the production capacity calculation formula of the roll crusher cannot be simply applied. (2) When the rotational speed of the roller is constant, The production capacity of mineral sizer crusher is determined by the ability of the tooth roller to bite into materials during operation. This ability is determined by two factors when the rotation phase of the relative tooth ring on two rolls remains unchanged. One is the geometric shape of the teeth, namely the area of the closed polygon formed by the two pairs of teeth before and after, and the other is the ore-rock characteristics of the material. The easier the material is to be crushed, the closer the amount of each bite is to the maximum allowed by the geometric structure of the tooth roll.
From the analysis of crushing mechanism, it can be seen that the new mineral sizer crusher is superior to the traditional jaw crusher and the spiral crusher in terms of energy saving, production capacity and particle size uniformity. The calculation methods of production capacity and power proposed are proved to be feasible and practical by the 1250 mineral sizer crusher, which was developed independently for the first time.