Integrated equipment for crushing and sieving

Abstract

The invention discloses integrated equipment for crushing and sieving which comprises a frame. A first step crushing device, a sieving device and a second step crushing device are arranged in the frame. The first step crushing device comprises a first step crushing rotor and a sieve for sieving crushed materials, and the first step crushing rotor and the sieve form a first step crushing cavity. The sieving device comprises a plurality of sieve rollers for material conveying arranged side by side, a plurality of sieve roller surfaces form sieve surfaces for sieving the materials, a gap between each two rollers forms a sieve mesh, and a conveying inlet of the sieving device is connected with the sieve. According to the present invention, crushed materials can smoothly pass sieve strips and enter the sieving device when the materials are roughly crushed, the materials pass the sieving device with no jam when the materials are sieved, the sieving rate is high, and the sieving device has a burden distribution effect. Oversize materials enter a fine crusher and are crushed step by step until particle sizes satisfy a requirement, which guarantees a required granularity of the crushed materials.

Description

technical field [0001] The invention relates to a crushing and screening integrated equipment for coarse crushing, screening and fine crushing of medium and low hardness materials such as coal and coke. Background technique [0002] Existing crushers have various forms such as toothed rollers, arc-shaped sieve plates or counter-attack tooth plates in the crushing cavity. When working, the material directly enters the material inlet of the crushing chamber, and the materials of different sizes fall together and are crushed together. After being crushed step by step, the material is discharged from the material outlet. But the problem that existing crusher exists is: [0003] 1. The materials are all in and all out, which causes the load of the crusher to increase, the wear and tear to increase, and the phenomenon of material over-crushing is serious. [0004] 2. Even if a screening device is provided, in the prior art, the screening equipment and the crushing equipment ...

AI Technical Summary

Problems solved by technology

[0003] 1. The material is all in and all out, which causes the load of the crusher to increase, the wear and tear to increase, and the phenomenon of material over-crushing is serious

[0004] 2. Even if a screening device is installed, in the prior art, the screening equipment and the crushing equipment are usually installed in different locations, resulting in large capital investment and cumbersome system layout

[0005] 3. When large pieces of material are mixed with fine materials and the continuous flow rate is large, the fine materials cannot be discharged from the crushing chamber in time and congestion will occur. When the humidity of the materials is high, a large amount of wet materials will stick in the crushing chamber. There will also be congestion

[0007] However, when the above-mentioned technical scheme crushes the material, when the large material is crushed into the fine material particle size that meets the requirements at one time, the crushing ratio is too large, and it is difficult for the crusher to crush the large material into the fine material that meets the requirements at one time.

As a result, the particle size of the material exceeds the standard and cannot meet the use requirements.

Moreover, the structure of the broken tooth plate is complicated, and the maintenance is difficult and the cost is high.

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