Vertical vibration grading crusher and crushing method

Abstract

The invention discloses a vertical vibration grading crusher and a crushing method, and is suitable for crushing middle coal selected during coal separation. The crusher adopts a vertical tapered structure. Four crushing chambers are arranged in the crusher, and each crushing chamber is provided with a crushing rotor adopting a wheel hub structure; the four rotors are connected through the same vertical shaft; a sieve plate is arranged under each crushing chamber; under the shearing, squeezing and impact of the crushing rotors, materials are crushed; after the materials in the last crushing chamber are sieved and crushed, the sieved materials enter the next crushing chamber to be further sieved and crushed, and then the sieved materials continue to be crushed and sieved; the final fine materials obtained after being crushed conforming to the requirement for particle size enter a material hopper through the lowest sieve plate; vibration exciters with the function of generating up-down vibration are arranged at the bottom of the crusher. The crusher is simple in structure, low in upper limit to the particle size of crushing, and can perform dry or wet vibration graded crushing on the materials; the materials meeting the requirement for particle size pass through the crusher in advance, so that the over crushing of middle coal is effectively avoided, and the coal separation of the middle coal after crushing is facilitated.

Description

technical field [0001] The invention relates to a vertical vibrating grading crusher and a crushing method, in particular to a vertical vibrating grading crusher and a crushing method for crushing medium coal separated from coal preparation. Background technique [0002] Main coking coal and fat coal have become scarce coal types in our country, and our country will face the problem of increasing shortage of high-quality coking coal resources. At present, the average yield of middling coal in coking coal preparation plants across the country is above 30%, and about 20% of the coking clean coal in middling coal is not released and is used as steam coal, resulting in a great waste of coking coal resources. If the country's main coking coal and fat coal are re-broken and re-sorted, it will increase the supply of coking coal resources in my country. However, in the re-election of medium coal, it is first necessary to crush the medium coal to about 2mm, so that the coal rock can...

AI Technical Summary

Problems solved by technology

At present, the equipment that can be used for medium coal crushing includes jaw crusher, hammer crusher, impact crusher, toothed roller crusher, double roller crusher, vertical shaft crusher and internal screen centrifugal crusher, etc. Although These crushers can be used for medium coal crushing, but to realize the deep (~2mm) crushing of wet medium coal, there are shortcomings such as over-crushing of the product, difficulty in accurately controlling the crushing particle size, and easy blockage of the crushing chamber.

If multiple screening equipment and multiple crushing equipment are used to form a multi-stage closed-circuit screening and crushing process, the process will be more complicated and the production cost will increase, which will restrict the re-sorting of medium coal

At present, the design and research of wet medium coal deep crushing equipment for medium coal re-selection in China are still blank, and they are all based on the use of traditional crushing equipment.

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