A kind of beneficiation and purification method of low-grade microcrystalline graphite

A technology of microcrystalline graphite and purification method, applied in chemical instruments and methods, flotation, solid separation, etc., can solve the problems of low grade of graphite concentrate and low recovery rate, and achieve short process, reasonable utilization, and enrichment ratio. high effect

Active Publication Date: 2022-01-28
HUNAN RES INST FOR NONFERROUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the object of the present invention is to provide a method for beneficiation and purification of low-grade microcrystalline graphite to solve the technical problems of low grade and low recovery rate of graphite concentrate obtained from the existing microcrystalline graphite ore beneficiation and purification

Method used

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  • A kind of beneficiation and purification method of low-grade microcrystalline graphite
  • A kind of beneficiation and purification method of low-grade microcrystalline graphite
  • A kind of beneficiation and purification method of low-grade microcrystalline graphite

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Effect test

Embodiment 1

[0024] A microcrystalline graphite mine in Hunan, the fixed carbon content in the ore is 55.32wt%, the main useful minerals in the ore are graphite, the gangue minerals are mica, quartz and chlorite, and a small amount of montmorillonite and calcite. Small amounts of metal sulfide minerals are pyrite, sphalerite, galena and chalcopyrite, respectively. In addition, it also contains a small amount of apatite, rutile and so on.

[0025] Under the condition of 72.18% ore grinding fineness, 400g / ton of emulsified kerosene as a collector and 80g / ton of ethyl ether alcohol as a foaming agent are added to the raw ore. The concentrated ore and tailings 2 are obtained through a selection of the ore; the concentrated ore is re-grinded once, the re-grinding concentration is 28%, the grinding fineness -0.037mm content is 88%, and the amount of emulsified kerosene is 30g / ton , The amount of ethyl ether alcohol is 10g / ton, and the selection is carried out twice, with a concentration of 12%,...

Embodiment 2

[0029] The raw ore is selected from a microcrystalline graphite mine in Heilongjiang. The fixed carbon content in the ore is 44.92wt%. The main useful mineral in the ore is graphite, and the main gangue minerals are quartz, illite, and muscovite.

[0030] Under the condition of 66.98% grinding fineness, 350g / ton of emulsified kerosene as a collector and 50g / ton of ethyl ether alcohol as a foaming agent are added to the raw ore. Selected ore concentrate and tailings 2 are obtained through a selection of ore; the selected concentrate is re-grinded once, the re-grinding concentration is 30%, the grinding fineness -0.037mm content is 85%, and the amount of emulsified kerosene is 30g / ton , The amount of ethyl ether alcohol is 10g / ton, and the selection is carried out twice, with a concentration of 10%, to obtain the first regrinding concentrate and the first regrinding tailings; the first regrinding Select the concentrated ore for the second regrind, the second regrind concentratio...

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Abstract

The invention relates to a method for beneficiation and purification of low-grade microcrystalline graphite. Firstly, the ore of microcrystalline graphite is sequentially crushed and ground, and a collector and a foaming agent are added to the ground pulp, stirred, and graphite flotation is carried out. Obtain graphite coarse concentrate and tailings 1; conduct a selection and a sweep of graphite coarse concentrate to obtain concentrated concentrate and tailings 2; conduct regrinding and selection on the selected concentrate to obtain a re-grinding Grinding concentrated concentrate and regrinding concentrated tailings; regrinding 1-2 times of regrinding concentrated ore, and then performing 2-4 times of beneficiation under acidic conditions to obtain high-grade graphite concentrate and regrinding Mill tailings. The mineral processing and purification method of the present invention has a short process flow and a high enrichment ratio, and solves the problems of low-grade aphanitic graphite mineral processing technical indicators, low graphite concentrate grade, low recovery rate, complicated process, and high cost, and makes low-grade microcrystalline Graphite ore is efficiently, economically and rationally utilized.

Description

technical field [0001] The invention relates to a method for beneficiating and purifying low-grade microcrystalline graphite, which belongs to the technical field of beneficiation. Background technique [0002] Graphite is a non-metallic mineral material and raw material with excellent performance and wide application. It is widely used in metallurgy, chemical industry, new energy vehicles, mechanical equipment, electronic information, nuclear power, aerospace and national defense and other industrial sectors. my country is rich in graphite resources and is the country with the largest natural graphite reserves, output and exports in the world. Microcrystalline graphite, commonly known as "earth graphite", the crystal diameter is less than 1μm, and its specific surface area is between 1-5m 2 Between / g, the fixed carbon content of raw ore is generally 40-80%, and a few are as high as 90% or more, often accompanied by quartz, dolomite, calcite, mica, kaolin, etc. Although t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/215B03D1/00B03B9/00
CPCB03B9/00B03D1/00C01P2006/80
Inventor 陈代雄胡波杨建文曾惠明董艳红朱雅卓肖骏贺国帅
Owner HUNAN RES INST FOR NONFERROUS METALS
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