Quick impacting grinding machine

Abstract

A quick impacting grinding machine is especially suitable for deep breaking and dissociation of water containing middlings in a coal preparation plant. The quick impacting grinding machine is of a drum-type structure and comprises an installation base; a drum-type machine body is arranged on the installation base, the inner wall of the drum-type machine body is provided with a counter-impacting block, the bottom of the drum-type machine body is provided with an open type quick discharging port, the upper portion of the drum-type machine body is provided with a feeding inlet, and the interior of drum-type machine body is provided with a grinding roller; and the grinding roller is provided with arc-shaped grinding impacting blocks and connected with a transmission device through a coupler. The quick impacting grinding machine is simple in structure, low in grinding particle size lower limit, small in over breaking phenomenon and not prone to being blocked, a ground middlings product is good in dissociation effect, clean coal in the middlings can be recycled, and the problems that according to existing coal breaking equipment, the grinding particle size lower limit is high, the middlings breaking and dissociation effect is poor, a breaking cavity is prone to being blocked, and the over breaking phenomenon of ground coal products is serious, and the follow-up separation and processing cost is high can be effectively solved.

Description

technical field [0001] The invention relates to an impact mill, in particular to a rapid impact mill suitable for coal crushing, grinding and dissociation in coal preparation plants. Background technique [0002] Crushing and grinding are important technical means to achieve efficient dissociation of coal (including medium coal). For re-selected coal, the medium coal must first be deeply crushed to fully dissociate the gangue, but the finer the crushing, the better. Because with the reduction of particle size, the difficulty of sorting is greater, and the cost of sorting is also higher. Especially when the particle size of the material reaches below 0.5mm and needs to be separated by flotation, the cost of coal preparation will be significantly increased. Therefore, from a technical and economic point of view, it is necessary to achieve efficient dissociation of coal under coarse-grained conditions, that is, to avoid excessive crushing of crushed products while ensuring su...

AI Technical Summary

Problems solved by technology

Therefore, design and develop medium coal high-efficiency crushing and dissociation equipment integrating impact and grinding to solve the problem of high crushing particle size limit of existing coal crushing equipment, poor crushing and dissociation effect of medium coal, easy blockage of crushing cavity, and coal grinding equipment products. The dissociation effect is good, but the over-crushing phenomenon is serious, the follow-up separation is difficult and the processing cost is high, which can create favorable conditions for the high-efficiency dissociation of re-selected coal in coal preparation plants and the recovery of clean coal after dissociation

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