Short process purification method of graphite

A purification method and short process technology, applied in chemical instruments and methods, solid separation, inorganic chemistry, etc., can solve the problems of low flotation effect and long purification process, so as to optimize the flotation effect and increase the probability of action. , reduce the effect of agglomeration

Active Publication Date: 2019-04-19
(CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a short-flow purification method for graphite in order to solve the problems of long and low flotation effect in the existing high-carbon graphite flotation purification process

Method used

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  • Short process purification method of graphite
  • Short process purification method of graphite
  • Short process purification method of graphite

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Experimental program
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Effect test

Embodiment 1

[0019] (1) Take natural medium-fine flake graphite lumps with a particle size of less than 100mm and a fixed carbon content of 10.5%, and use a cone crusher, ball mill, and spiral classifier in sequence to carry out crushing-grinding-classification closed-circuit technology to obtain solids with a particle size of less than 0.5mm Graphite-containing pulp;

[0020] (2) Dilute the graphite pulp with water to a mass concentration of 40% and import it into the slurry tank, add kerosene (500g / t) and terpineol oil (150g / t) in sequence, stir for 2 minutes, and import the graphite pulp after pulping into the buoy Separator, inflating and scraping foam to get graphite roughing concentrate foam, concentrating the graphite roughing concentrate foam to a mass concentration of 40%, and then introducing it into a selection flotation machine after being ground by a sand mill. Soak the first-time selected graphite concentrate foam, concentrate the first-time selected graphite concentrate foam...

Embodiment 2

[0027] (1) The microcrystalline graphite lump ore with a particle size of less than 100mm and a fixed carbon content of 65.33% is crushed and ground to produce microcrystalline graphite ore powder with a particle size of less than 0.1mm, and the microcrystalline graphite ore powder is mixed with water to prepare a mass concentration 50% ore pulp, lead the ore pulp to the roughing slurry tank, add sodium silicate (500 g / t) with a modulus of 2.8 and a mass fraction of 10% in sequence, kerosene (960 g / t), terpineol oil (420 g / t ), after stirring for 2 minutes, import it into the rougher flotation machine, add water and adjust the slurry to a mass concentration of 30%, inflate and scrape to obtain rougher microcrystalline graphite concentrate;

[0028] (2) Concentrate the coarsely selected microcrystalline graphite concentrate to a pulp with a mass concentration of 45%, and introduce it into a direct-contact ultrasonic dispersion tank with a single output power of 2.8kW. After cont...

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Abstract

The invention relates to a short process purification method of graphite. The method includes crushing, grinding and flotation steps, and is characterized in that the method includes the following steps: (1) preparing graphite or a carbonaceous material having a particle size of less than 1 mm and a fixed carbon content of not less than 35% into pulp having a concentration of not higher than 60%,placing a direct contact type ultrasonic oscillator into the pulp, and controlling the power to be not less than 1.0 kW and time to be not less than 1 min; (2) diluting the crushed and dispersed pulpto pulp having a concentration of not higher than 30% and sending the diluted pulp into flotation equipment, adding an inhibitor, a collector and a foaming agent for coarse selection and fine selection in order, and carrying out stirring, inflation and flotation to obtain graphite concentrate and graphite tailings; and (3) condensing the graphite concentrate and graphite tailings until the concentration is 30%-60% or sending the graphite concentrate and graphite tailings into a direct contact type ultrasonic oscillator container for crushing and dispersing, and repeating the step (1) and (2) for 2-3 times. The beneficial effects of the short process purification method of graphite are that the method improves the dissociation efficiency, reduces the number of grinding and flotation, helpsto reduce the amount of a flotation reagent and improve the efficiency of the flotation reagent, optimizes the flotation effect, and improves the carbon content of the concentrate.

Description

technical field [0001] The invention belongs to the technical processing field of graphite beneficiation and purification, and in particular relates to a short-flow purification method of graphite. Background technique [0002] Graphite is an important strategic resource and an important component of materials such as electrical conductivity, fire resistance, anti-corrosion, lubrication, and sealing in the fields of new energy, national defense, and chemical industry. At present, the preparation of high-carbon graphite from natural flake graphite mostly adopts stage grinding and stage flotation processes. The main purpose is to protect large flake graphite, but the flotation process is too long (such as nine times of grinding, eleven times of flotation, etc.) ; The method of preparing high-carbon graphite from microcrystalline graphite (cryptocrystalline graphite, earthy graphite) is not only partly referred to as flake graphite ore dressing and purification method, but also...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03B1/00B02C19/18C01B32/215
CPCB02C19/18B03B1/00B03D1/025C01B32/215
Inventor 张乾伟潘力吴建新石倩倩俞燕强李佩悦
Owner (CNBM) BENGBU DESIGN & RES INST FOR GLASS IND CO LTD
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