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A kind of crystalline graphite flotation coarse concentrate fine classification method

A technology of crystalline graphite and coarse concentrate, which is applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems of difficulty in extracting fine flake graphite and excessive grinding of large flakes, so as to improve stability and reliability regulatory effect

Active Publication Date: 2021-07-30
ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention proposes a fine separation method of crystalline graphite flotation coarse concentrate, which solves the problems of over-grinding of large scales and difficulty in extracting fine scale graphite in the crystalline graphite mixed-mesh flotation process. It has obvious effects in improving the yield of large flakes, improving the grade of concentrate, shortening the process flow, and improving the overall processing capacity.

Method used

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  • A kind of crystalline graphite flotation coarse concentrate fine classification method
  • A kind of crystalline graphite flotation coarse concentrate fine classification method
  • A kind of crystalline graphite flotation coarse concentrate fine classification method

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Experimental program
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Effect test

Embodiment 1

[0044]Samples 1-3 were crushed and ground, and the upper limit of the grinding product’s particle size was 1 mm. Three groups of coarse concentrates were obtained under the same process conditions. The same process conditions were: one-stage roughing, during the roughing process, adding Water glass 2000g / t, kerosene 150g / t, No. 2 oil 75g / t; rougher concentrate and rougher tailings are obtained by roughing, and rougher concentrate is rough concentrate, and the rough concentrate is separated by gravity+ Flotation carries out "fine quality separation" operation, and "fine quality separation" operation adopts spiral quality separator. The quality separation process is as follows Figure 5 As shown, the results of fine quality classification are shown in Table 2.

[0045] Table 2 Raw ore fractionation test results under different fixed carbon content

[0046]

[0047] See Table 3 for the 0.15mm sieving results of the quality-separated products.

[0048] Table 3 0.15mm sieving ...

Embodiment 2

[0063] Taking sample 2 as an example, a full-process closed-circuit test was carried out, such as Figure 6 As shown, it specifically includes the following steps:

[0064] (1) One-stage roughing, during the roughing process, add water glass 2000g / t, kerosene 150g / t, No. 2 oil 75g / t; roughing to obtain roughing concentrate and roughing tailings, the roughing concentrate is Coarse concentrate, and use gravity separation + flotation to carry out "fine quality separation" operation on the coarse concentrate to obtain K coarse and K fine. The rough separation tailings are subjected to a stage of scavenging, and 1800g / t of water glass is added during the scavenging process. Kerosene 70g / t, No. 2 oil 40g / t, the final tailings and scavenging concentrate are obtained, and the scavenging concentrate is returned to roughing.

[0065] (2) K rough is re-grinded and re-selected after four stages: the grinding medium ratio is M 3～5mm :M 1～2mm =2:1, ball material ratio is M 球 :M 料 =4:1,...

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Abstract

The present invention proposes a kind of crystalline graphite flotation coarse concentrate fine classification method, carry out according to the following manner: (1) carry out crushing and grinding to raw ore to obtain grinding product, the upper limit particle size of grinding product is 1-2mm, Grinding products are subjected to 1-2 stage roughing to obtain rough concentrate, and the rough concentrate is obtained through 0-2 stage selection to obtain rough concentrate; (2) the rough concentrate obtained in step (1) is re-selected + The combined method of flotation is used for quality separation to obtain coarse-grained and fine-grained products, and the two separated products are regrinded and re-selected to obtain the final graphite concentrate product. The invention solves the problems of over-grinding of large flakes and difficulty in extracting fine graphite flakes in the flotation process of mixed mesh of crystalline graphite, and has advantages in improving the yield of large flakes, improving the grade of concentrate, shortening the process flow, and improving the overall processing capacity. Obvious effect.

Description

technical field [0001] The invention relates to a graphite flotation method, in particular to a crystalline graphite flotation coarse concentrate fine separation method. Background technique [0002] Crystalline graphite, also known as flake graphite, has excellent physical and chemical properties such as electrical conductivity, thermal conductivity, high temperature resistance, plasticity, lubricity, and chemical inertness. It is widely used in metallurgy, machinery, electrical, light industry, chemical industry, textile, national defense, etc. It is one of the indispensable non-metallic materials for the development of high-tech in the world today. Its scales are divided into sizes, the larger the scales, the higher the grade, and the greater the market value. Once the large scales are damaged, they cannot be restored, and they cannot be artificially synthesized at present, so how to protect the scales during the flotation purification process has always been a focus of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03B1/00B03B9/00B03B7/00B03B5/52
Inventor 刘磊冯安生郭珍旭牛敏张然
Owner ZHENGZHOU MINERALS COMPOSITIVE UTILIZATION RES INST CHINESE GEOLOGICAL ACAD