Method for graphite ore enhanced flotation purification through microwave roasting pretreatment

A technology for pretreatment of graphite and microwave roasting, applied in chemical instruments and methods, flotation, inorganic chemistry, etc., can solve problems such as poor flotation effect, uneven particle size of embedding, difficulty in monomer dissociation, etc., to reduce grinding Mining time, improving flotation effect, improving the effect of dissociation degree

Pending Publication Date: 2021-07-09
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0005] The present invention aims at the problems in the prior art that the embedded particle size of low-grade fine-scale graphite ore is very fine, the crystal particle size is far lower than the lower limit of mineral flotation particle size, the flotation effect is poor, the embedded particle size is uneven, and the monomer dissociation is difficult. A microwave roasting pretreatment method for strengthening flotation purification of graphite ore. The present invention adopts microwave pretreatment to promote the degree of monomer dissociation during subsequent grinding of graphite ore, while increasing the degree of dissociation and reducing the grinding time, thereby Reduce energy consumption and machine wear, improve the economic efficiency of production

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  • Method for graphite ore enhanced flotation purification through microwave roasting pretreatment

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Effect test

Embodiment 1

[0023] Embodiment 1: a kind of microwave roasting pretreatment graphite ore strengthened flotation purification method (see figure 1 ),Specific steps are as follows:

[0024] (1) The low-grade fine-scale graphite ore is crushed to a particle size of 0.83-1.7mm to obtain graphite ore particle A, and graphite ore particle A is pretreated by microwave roasting for 5 minutes to obtain graphite ore particle B; wherein the fixed carbon of low-grade fine-scale graphite ore The content is 5.63%, the main components of impurities are oxides of elements such as Fe, Al, Ca, Mg, Si, etc., and the water content is below 1%;

[0025] (2) step (1) graphite ore particle B is carried out wet grinding treatment to particle size not more than 0.075mm and accounts for 86% to obtain flotation graphite ore slurry;

[0026] (3) Step (2) Add 90g / t foaming agent A1 (No. 2 oil), 360g / t collector A2 (kerosene), 1000g / t regulator A3 (sodium silicate) in the flotation graphite pulp Sweeping, adding 45g / ...

Embodiment 2

[0029] Embodiment 2: a kind of microwave roasting pretreatment graphite ore enhanced flotation purification method (see figure 1 ),Specific steps are as follows:

[0030] (1) The low-grade fine-scale graphite ore is crushed to a particle size of 0.83-1.7mm to obtain graphite ore particle A, and graphite ore particle A is pretreated by microwave roasting for 10 minutes to obtain graphite ore particle B; wherein the fixed carbon of low-grade fine-scale graphite ore The content is 5.63%, the main components of impurities are oxides of elements such as Fe, Al, Ca, Mg, Si, etc., and the water content is below 1%;

[0031] (2) step (1) graphite ore particle B is carried out wet grinding treatment to particle size and is not more than 0.075mm and accounts for 84% and obtains flotation graphite ore slurry;

[0032](3) Step (2) Add 60g / t foaming agent A1 (No. 2 oil), 300g / t collector A2 (kerosene), 1200g / t regulator A3 (sodium silicate) in the flotation graphite pulp Sweeping, adding...

Embodiment 3

[0035] Embodiment 3: a kind of microwave roasting pretreatment graphite ore strengthened flotation purification method (see figure 1 ),Specific steps are as follows:

[0036] (1) The low-grade fine-scale graphite ore is crushed to a particle size of 0.83-1.7mm to obtain graphite ore particle A, and graphite ore particle A is pretreated by microwave roasting for 20 minutes to obtain graphite ore particle B; wherein the fixed carbon of low-grade fine-scale graphite ore The content is 5.63%, the main components of impurities are oxides of elements such as Fe, Al, Ca, Mg, Si, etc., and the water content is below 1%;

[0037] (2) step (1) graphite ore particle B is carried out wet grinding treatment to particle size and is not more than 0.075mm and accounts for 84% and obtains flotation graphite ore slurry;

[0038] (3) Step (2) Add 80g / t foaming agent A1 (No. 2 oil), 250g / t collector A2 (kerosene), 1100g / t regulator A3 (sodium silicate) in the flotation graphite pulp Sweeping, a...

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Abstract

The invention relates to a method for graphite ore enhanced flotation purification through microwave roasting pretreatment, and belongs to the technical field of graphite purification. According to the method, the low-grade fine flake graphite ore difficult to float is subjected to microwave roasting pretreatment to strengthen flotation to improve the graphite purification effect, the fixed carbon content of the graphite ore is 5%-20%, the main components of impurities are oxides of elements such as Fe, Al, Ca, Mg and Si, the water content is 1% or below, the graphite ore is subjected to microwave roasting pretreatment for 5-30 min and then subjected to crushing and wet grinding, and flotation is performed for many times to obtain a graphite product with the fixed carbon content of 95%-97%. The method can be used for effectively purifying the graphite ore, so that the graphite meets the production requirements; and the purification method has the advantages of low energy consumption, easiness in operation, high product purity, easiness in industrialization and the like.

Description

technical field [0001] The invention relates to a microwave roasting pretreatment enhanced flotation purification method for graphite ore, which belongs to the technical field of graphite purification. Background technique [0002] Graphite has excellent physical and chemical properties such as high temperature resistance, thermal and electrical conductivity, stable chemical properties, and good lubricity. It is an important and widely used non-metallic mineral material and raw material. In recent years, with the continuous expansion of the application field of graphite, a variety of new graphite materials have been developed using graphite as raw material, such as graphene materials, lithium-ion battery negative electrode materials spherical graphite, nano-graphite, etc. However, at present, due to the wide range of graphite uses and the increase in consumption year by year, graphite ore resources, especially easy-to-select high-quality flake graphite resources, are constan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/008B03D1/002C01B32/215B03D101/04B03D101/02B03D103/04
CPCB03B7/00B03D1/002B03D1/008B03D2201/007B03D2201/02B03D2201/04B03D2203/04C01B32/215
Inventor 陈正杰曹世界马文会吴丹丹李绍元魏奎先周振伟
Owner KUNMING UNIV OF SCI & TECH
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