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Low-grade aphanitic graphite dressing and purifying method

The technology of cryptocrystalline graphite and purification method is applied in the field of beneficiation and purification of low-grade cryptocrystalline graphite, which can solve the problems of high fixed carbon content, large environmental pollution and high processing cost, so as to improve the pulp environment and improve the flotation efficiency. Effect

Active Publication Date: 2013-05-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of high requirements on raw ore fixed carbon content, high processing cost, and large environmental pollution in the existing cryptographic graphite purification, and to provide a method for purifying cryptocrystalline graphite, which can make a large amount of fixed carbon content Cryptographite resources with low iron content and excessive iron content can be efficiently utilized

Method used

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Embodiment 1

[0027] refer to figure 2 , to describe Embodiment 1 of the present invention in detail.

[0028] 1) The first stage of grinding - flotation

[0029] The aphanitic graphite raw ore with a fixed carbon content of 49.26% and an iron content of 2.307% is crushed to less than 0.5mm, the first stage of grinding, the fineness to -0.074mm accounts for 40%, and the grinding concentration is 50%; the first stage of grinding Add slime flocculant (a mixture of polyethylene oxide and acidified water glass at a mass ratio of 1:10) 500g / t, inhibitor water glass 1000g / t, collector kerosene 1000g / t to the ore pulp 1. The foaming agent MIBC is 200g / t, and it is stirred evenly in the stirring tank; the ore pulp after the action of the agent is passed into a mechanically stirred flotation machine for rough separation, and the rough concentrate is subjected to one beneficiation to obtain the first The first stage of grinding-flotation concentrate, the concentrate enters the second stage of grin...

Embodiment 2

[0040] refer to image 3 , to describe Embodiment 2 of the present invention in detail.

[0041] 1) The first stage of grinding - flotation

[0042] The aphanitic graphite raw ore with a fixed carbon content of 63.52% and an iron content of 2.12% is crushed to less than 0.5mm, the first stage of grinding, the fineness to -0.074mm accounts for 60%, and the grinding concentration is 50%; the first stage of grinding Add slime flocculant (a mixture of polyethylene oxide and acidified water glass at a mass ratio of 1:10) 450g / t, inhibitor water glass 1000g / t, collector kerosene 1200g / t to the ore pulp , the foaming agent MIBC is 240g / t, and it is stirred evenly in the stirring tank; the ore pulp after the action of the agent is passed into a mechanically stirred flotation machine for rough separation, and the rough concentrate is selected once to obtain the first The first stage of grinding-flotation concentrate, the concentrate enters the second stage of grinding-flotation, and ...

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Abstract

The invention relates to a low-grade aphanitic graphite dressing and purifying method, belonging to the technical field of graphite purification. The method comprises the following steps: firstly, crushing and grinding aphanitic graphite ores with fixed carbon content of 45-80%; adding a slime flocculant, an inhibitor, a collector and a foamer into the ore pulp, separating by flotation in a mechanical flotation machine, re-grinding and re-separating the flotation concentrate to remove most gangue mineral in the ores, thus obtaining final flotation concentrate; removing iron-contained gangue mineral in the final flotation concentrate by high-gradient magnetic separation, thus being capable of obtaining a product II satisfying the requirements of number WT88 or more. And a product II satisfying the requirements of number W80 can be obtained by re-grinding and re-separating the middling product and concentratedly re-separating the magnetically separated middling product. The total recovery is more than 80%. The low-grade aphanitic graphite dressing and purifying method is low in requirement on fixed carbon content of the ores, capable of effectively reducing iron-contained impurities, large in processing amount, low in production cost and environmental-friendly.

Description

technical field [0001] The invention relates to a method for beneficiation and purification of low-grade aphanitic graphite, which belongs to the technical field of graphite purification. Background technique [0002] Aphanitic graphite is one of the dominant minerals in my country. Among them, the raw ore grade of Lutang graphite mining area in Chenzhou is 50%~90%, and the iron content of some raw ore is 1.0%~1.5%. The average grade of the mining area is 60% to 65%, and the iron content of the raw ore is 2.0% to 3.0%. The current on-site process: raw ore→coarse crushing→medium crushing→drying→grinding→grading→packaging, this production process has the following problems: 1) some low-carbon raw ore is difficult to use; 2) the fixed carbon content of primary processed products is low, which cannot Further deep processing into graphite materials, the products are mainly used in low-end fields such as foundry, steelmaking recarburizer, graphite electrodes, battery carbon rods, ...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/215
Inventor 冯其明李洪强欧乐明张国范卢毅屏
Owner CENT SOUTH UNIV
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