A kind of beneficiation and purification method of microcrystalline graphite

A technology of microcrystalline graphite and purification method, which is applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem of not meeting the dissociation particle size requirements of microcrystalline graphite embedded with microcrystalline particles, and increasing the acid consumption. Environmental protection impact , Restricting industrial application and other issues, to achieve the effect of simplifying the multi-stage wet grinding-flotation process, eliminating the investment in mineral processing equipment, and reducing the number of grinding times

Active Publication Date: 2017-03-29
LIAONING TECHNICAL UNIVERSITY
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Problems solved by technology

This process uses a conical ball mill to directly wet-grind the crushed graphite raw ore. The grinding concentration is 66.7%, and the filling rate of the ball mill is 45%. The passing rate is checked with a 0.074mm standard sieve water sieve, and the grinding fineness is adjusted by the grinding time; In this method, the wet sieving and grading efficiency is low, which seriously limits its industrial application; at the same time, in the process of wet grinding, secondary impurities enter the flotation process due to the loss of the grinding medium, which increases the consumption in acid leaching. The amount of acid and circulating fluid have an impact on environmental protection; in addition, the grinding fineness of microcrystalline graphite is -200 mesh, which requires a pass rate of more than 90%, and the particle size range is too wide to meet the dissociation of microcrystalline graphite embedded with microcrystalline particles. Granularity requirements

Method used

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  • A kind of beneficiation and purification method of microcrystalline graphite
  • A kind of beneficiation and purification method of microcrystalline graphite
  • A kind of beneficiation and purification method of microcrystalline graphite

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Embodiment 1

[0030] refer to figure 2 The shown process flow diagram illustrates the embodiment 1 of the present invention, and the beneficiation and purification method of the microcrystalline graphite of the present embodiment is carried out according to the following steps:

[0031] (1) The microcrystalline graphite raw ore with a fixed carbon content of 65~70% is crushed to below 50mm by a jaw crusher. After crushing, the microcrystalline graphite below 50mm is crushed to below 3mm by a hammer crusher. After pulverization, the microcrystalline graphite powder with a particle size of -10μm and +10μm is obtained by air classifier classification, and the microcrystalline graphite powder with a particle size of +10μm is returned to the original ultrafine pulverizing equipment to be pulverized and classified again until the particle size is -10μm, Enter the flotation step, control the amount of ultra-fine pulverization and the ultra-fine pulverization time, so that the weight of each retur...

Embodiment 2

[0039] refer to image 3 The shown process flow diagram illustrates the embodiment 2 of the present invention, and the beneficiation and purification method of the microcrystalline graphite of the present embodiment is carried out according to the following steps:

[0040] (1) The microcrystalline graphite raw ore with a fixed carbon content of 50~60% is crushed to below 50mm by a jaw crusher. After crushing, the microcrystalline graphite below 50mm is crushed to below 3mm by a hammer crusher. After pulverization, the microcrystalline graphite powder with a particle size of -10μm and +10μm is obtained by air classifier classification, and the microcrystalline graphite powder with a particle size of +10μm is returned to the original ultrafine pulverizing equipment to be pulverized and classified again until the particle size is -10μm, Enter the flotation step, control the amount of ultra-fine pulverization and the ultra-fine pulverization time, so that the weight of each return...

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Abstract

The invention belongs to the technical field of mineral processing and purification of graphite, and in particular relates to a method for mineral processing and purification of microcrystalline graphite. The present invention adopts one stage of coarse crushing, one stage of fine crushing, one stage or two stages of dry ultrafine crushing-classification, and then combines multi-stage beneficiation and multi-stage sweeping processes. The invention is a purification process with less grinding and more flotation, which can obtain microcrystalline graphite flotation concentrate with fixed carbon content of more than 90%, microcrystalline graphite flotation concentrate with fixed carbon content of more than 75% and fixed carbon content of less than 20% microcrystalline graphite tailings.

Description

technical field [0001] The invention belongs to the technical field of graphite beneficiation and purification, in particular to a beneficiation and purification method for microcrystalline graphite. Background technique [0002] Chinese invention patent CN103072975A proposes a method for beneficiation and purification of low-grade cryptocrystalline graphite. In the method, cryptocrystalline graphite raw ore with a fixed carbon content of 45-80% is crushed, ground, and flotated, and the obtained flotation concentrate is processed by After multi-stage regrinding and selection, the final flotation concentrate is subjected to high gradient magnetic separation to obtain graphite powder that meets the requirements of grade WT88 or above. The method adopts a multi-stage regrinding and reseparation process for the flotation concentrate, and the process is complicated in the production process, which not only needs to increase the number of grinding and concentration equipment, but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/215
Inventor 李彩霞孟媛媛任瑞晨张乾伟庞鹤石倩倩白阳荣振伟张孝松张祥龙白扬赵家林陈康王志恒
Owner LIAONING TECHNICAL UNIVERSITY
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