Method for grading and dehydration by using vibrating screen in graphite flotation

Abstract

The invention relates to a method for grading and dehydration by using a vibrating screen in graphite flotation and belongs to the technical field of graphite flotation. The method comprises the following steps: step I, hitting low-concentration graphite flotation concentrate with the volume concentration of 10%-15% into a vibrating screen by a pump; step II, by means of the vibration of the vibrating screen, enabling the dehydrated graphite concentrate on the screen to enter a ball mill for grinding so as to reach expected grinding fineness, wherein the grinding fineness is that the content of the concentrate less than 100-mesh is 68%-72%; and step III, enabling the graphite concentrate milled by the ball mill in step II and the screened graphite concentrate to together enter an agitation tank for agitation, and then performing flotation operation. The method for grading and dehydration by the vibrating screen has the advantages as follows: the technological process is pollution-free, the grinding concentration when the graphite concentrate is milled again is improved, the grinding treatment quantity is reduced, the grinding cost is reduced, and the grinding fineness and the recovery rate of the graphite concentrate are improved; the production cost is low, and a certain economic value is achieved; and at the same time, the process equipment is simple and the popularization is easy.

Description

technical field [0001] The invention belongs to the technical field of graphite flotation, in particular to a graphite flotation process. Background technique [0002] Flake graphite is widely used in advanced refractories and coatings in the metallurgical industry. Such as magnesia carbon bricks, crucibles, etc. Stabilizer for pyrotechnic materials in military industry, desulfurization accelerator in smelting industry, pencil lead in light industry, carbon brush in electrical industry, electrode in battery industry, catalyst in fertilizer industry, etc. Flake graphite can be further processed to produce graphite milk, which can be used in lubricants, release agents, wire drawing agents, conductive coatings, etc. [0003] With the continuous development of science and technology, people have also developed many new uses for graphite. Flexible graphite products. Flexible graphite, also known as expanded graphite, is a new graphite product developed in modern times. Espec...

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Problems solved by technology

However, due to the small specific gravity and fine particle size of graphite, the sedimentation speed in water is slow, and even floats on the water surface, so it is different from ordinary flotation concentrates. The dehydration effect of hydrocyclone or sedimentation centrifuge is not good, resulting in the loss of graphite and loss of graphite. The recovery rate also affects the grinding efficiency in the next step; and a part of the fine-grained graphite minerals that have been dissociated enter the ball mill for grinding with all the concentrated minerals, resulting in over-grinding of this part of the minerals and destroying the large scale rate of graphite.

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