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A method for improving the flotation efficiency of fine-grained graphite

Active Publication Date: 2020-04-07
HUNAN RES INST FOR NONFERROUS METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] my country is rich in microcrystalline graphite resources. Different from crystalline graphite, microcrystalline graphite has a very fine embedded particle size. The embedded particle size is fine, and the crystal particle size is far lower than the lower limit of mineral flotation particle size. The flotation effect is poor, and graphite is slippery and difficult. Grinding, making graphite difficult to dissociate
The existing problems are as follows: (1) the crystal grain size of aphanitic graphite ore is 1 to 5 microns, which is far below the lower limit of mineral flotation grain size, resulting in poor flotation effect and difficult flotation recovery; (2) graphite mineral embedded grain size Uneven, monomer dissociation is difficult; (3) The raw ore contains some carbonaceous substances with incomplete graphitization, and the floatability is worse than that of crystalline graphite

Method used

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  • A method for improving the flotation efficiency of fine-grained graphite
  • A method for improving the flotation efficiency of fine-grained graphite
  • A method for improving the flotation efficiency of fine-grained graphite

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Experimental program
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Effect test

Embodiment 1

[0035] The raw ore is fine-grained aphanitic graphite ore in Chenzhou, Hunan Province. The fixed carbon content of the raw ore is 70.21%. The gangue minerals are mainly quartz and mica, and a small amount of montmorillonite and calcite, among which the mica content is 12.24%. Most of the graphite exists in fine particle size. The gangue minerals such as quartz and mica are small in size and tightly embedded.

[0036] Flotation reagent system and process

[0037] (1) Use a vertical mill to grind the graphite raw ore, add and adjust the grinding aid sodium carbonate in the mill, the grinding concentration is 30%, and the grinding fineness is: -0.074mm, accounting for 78%.

[0038] (2) Add the following inhibitors and collectors to the pulp according to this, and carry out the roughing operation of graphite, and the roughing operation concentrate is regrinded and selected for three times to obtain the concentrate product; the tailings of the roughing operation are added to captu...

Embodiment 2

[0052] The raw material is Xichuan graphite mine. The fixed carbon content of the original ore is 50.12%. Body dissociation, belonging to low-grade fine-grained microcrystalline graphite ore. The mica content in the gangue is 14.8%, the carbonate mineral content is 5.2%, and the mineral symbiosis relationship is complex.

[0053] The inhibitors described below consist of the following components:

[0054]

[0055] (The active ingredients are water glass, sodium hexametaphosphate, carboxymethyl cellulose)

[0056] The collector consists of the following components:

[0057]

[0058] (The active ingredients are fatty acid methyl ester, α-olefin, propanol)

[0059] 1. Laboratory small-scale test flotation agent system and process

[0060] (1) Use a vertical mill to grind the graphite raw ore, add and adjust the grinding aid sodium carbonate in the mill, the grinding concentration is 35%, and the grinding fineness is: -0.074mm, accounting for 84%.

[0061] (2) Add the i...

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Abstract

The invention discloses a method for improving the floatation efficiency of fine grain-grade graphite. The method comprises the following steps that (1) a grinding machine is adopted for grinding microcrystalline graphite raw ores, the grinding concentration is 30-35%, and the mesh of grind of -0.074 mm accounts for 75-85%; and (2) an inhibitor and a collecting agent are sequentially added into ore pulp, roughing of graphite is carried out, so that the rough ore concentrate and rough tailings are obtained, then re-grinding is carried out on the rough concentrate, then the inhibitor and the collecting agent are sequentially added after re-grinding for concentration, and a concentrate product is obtained. The method is simple in process, the dissociation of the fine grain-grade microcrystalline graphite can be promoted by adopting a multi-section vertical grinding process, so that the grade and the recovery rate of the graphite concentrate can be ensured, and the dosage of chemicals is small.

Description

technical field [0001] The invention relates to a method for improving the flotation efficiency of fine-grained graphite, which belongs to the field of graphite mineral processing. Background technique [0002] Graphite has many excellent properties such as high temperature resistance, thermal shock resistance, thermal conductivity, electrical conductivity, lubricity, plasticity and chemical stability, and is widely used in metallurgy, machinery, electrical appliances, chemicals, textiles and national defense and other industrial fields. However, my country's graphite industry is facing chaotic mining order and serious waste of resources; backward mining and selection technology, overcapacity, and serious pollution; whether graphite resources can continue to be adequately and stably supplied plays an important role in the sustainable development of the country. [0003] my country is rich in microcrystalline graphite resources. Different from crystalline graphite, microcryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03B7/00B03B9/00B03D101/02B03D101/06B03D103/04
CPCB03B7/00B03B9/00B03D1/018B03D2201/02B03D2201/06B03D2203/04
Inventor 董艳红陈代雄杨建文肖骏贺国帅胡波曾惠明朱雅卓谭超
Owner HUNAN RES INST FOR NONFERROUS METALS
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