Sand making method and sand making device

Abstract

The invention discloses a sand making method and a sand making device. The sand making method comprises a feeding procedure, a crushing procedure and a sorting procedure. The sand making method also comprises the step of adding a buffering material into a crushing machine, wherein the buffering material and materials are mixed and crushed to obtain a crushed material mixture. In the prior art, under high-speed operation of a rotor, large particles or blocky materials are thrown out and obtain high speed, fierce collision between the materials and between the materials and the inner wall of the crushing machine (namely 'collision between stones' or 'collision between stone and iron') causes generation of a great amount of dust and further influences the finished-product ratio and the quality of the products seriously; but in the technical scheme, since the procedure of adding the buffering material into the crushing machine is added, the collision mode of the materials is changed, on the basis of original collision, the collision between the materials and the buffering materials is increased, and the fierce degree of collision is properly reduced, so that the generation amount of the dust is greatly reduced and the finished-product ratio and the quality of the products are improved.

Description

technical field [0001] The invention relates to the field of mechanical sand making, in particular to a sand making method and a sand making device. Background technique [0002] At present, the existing sand making device generally includes a crusher, a first sorting device, a second sorting device and a dust collecting device. Firstly, the raw materials are put into the crushing cavity from the central discharge port of the crusher, and the raw materials crushed by the crusher are screened for the first time in the first sorting device. The first screening generally includes screen sorting and wind sorting. After sieving, three types of products are obtained: coarse particles (particles larger than the required particle size), fine particles (particles with the required particle size) and micropowder (particles smaller than the required particle size). It is transported back to the central discharge port of the crusher for re-crushing, the fine particles are used for sand...

AI Technical Summary

Problems solved by technology

[0003] In the above-mentioned raw material crushing process, the raw material forms a sand-making process in the crushing chamber of the crusher through the principle of "stone-on-rock" or "stone-on-iron". The rotor in the machine is thrown out under the high-speed operation, and the thrown out raw materials collide violently with the inner wall of the crushing cavity or the raw materials on the inner wall during the high-speed movement. The machine-made sand usually contains more than 20% dust, which reduces the yield of the machine-made sand and affects the quality of the machine-made sand. Excessive dust will seriously pollute the environment

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