Process for extracting elemental aluminium by coal gangue acidification

Abstract

The invention belongs to the technical field of coal gangue extraction equipment, and particularly relates to a process for extracting elemental aluminium by coal gangue acidification. According to the process, through arranging a microwave generator and an ultrasonic generator, through controlling the microwave power to be between 780 and 820W and through setting the microwave generation time tobe 1 hour, an extraction ratio of the elemental aluminium in the coal gangue can reach 95%; an extracting speed of the coal gangue is accelerated through the ultrasonic generator; a coal gangue acidification treatment kiln used in the process comprises a kiln body which is internally provided with a squeezing plate, wherein the squeezing plate is designed in an annular shape; a filter plate is arranged below a drive cabin, a grinding groove is formed in the filter plate and grinding balls are arranged in the grinding groove; four stirring rods are uniformly and fixedly connected to the surfaceof a third airbag; an aeration tank is arranged in push plates; and aeration holes are uniformly formed in the surfaces of the push plates and communicate with the aeration tank. The coal gangue acidification treatment kiln is simple in structure and can sufficiently crush the coal gangue, and in addition, the coal gangue can be evenly stirred and mixed and the acidification rate is high.

Description

technical field [0001] The invention belongs to the technical field of coal gangue refining equipment, in particular to a process for extracting aluminum elemental substance by acidizing coal gangue. Background technique [0002] Coal gangue is solid waste discharged during the coal mining process and coal washing process. It is a black-gray rock with low carbon content and harder than coal that is associated with coal seams during the coal formation process. In general, its main components are Al2O3, SiO2, etc., so coal gangue is a resource and energy that can be used. [0003] In the prior art, some technical schemes of coal gangue acidification treatment kilns have also appeared. For example, a Chinese patent with application number 2017218223713 discloses a coal gangue acidification reaction kiln, including a kiln body, and the top of the kiln body is provided with an advanced There are two groups of first motors fixedly installed on the outer wall of the upper end of t...

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Problems solved by technology

[0005] In order to make up for the deficiencies of the existing technology, solve the incomplete pulverization of coal gangue, reduce the efficiency of acidification treatment, and the uneven mixing of acidification of coal gangue, which leads to the difficulty in the degree of acidification of coal gangue, reduces the efficiency of acidification treatment of coal gangue and cannot provide the best temperature for reaction , the problem that the acidification extraction rate of coal gangue is too slow, a process for extracting aluminum elemental substance by acidification of coal gangue proposed by the present invention

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