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Method for two-step production of medium carbon and high carbon flake graphite

A flake graphite and two-step technology, which is applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve the problems of small increase in fixed carbon content, long process flow, and low regrinding efficiency, and achieve shortened regrinding time, shorten the selection process, and the effect of rapid dissociation

Active Publication Date: 2017-12-08
BEIJING GENERAL RES INST OF MINING & METALLURGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After that, the main function of regrinding and selection of about 90% of medium-carbon graphite is to scrub, and the fixed carbon content of a single selection operation has a small increase. Usually, it needs to go through 5-7 times of regrinding and 6-9 times of selection to obtain Flake graphite concentrate with a fixed carbon content of more than 95% has a long process and high energy consumption
Due to the long flake graphite flotation process and relatively fixed process structure, the production process is not easy to adjust and the product specifications are fixed
[0004] Conventional flake graphite flotation process has low regrinding concentration of concentrate, resulting in low regrinding efficiency and low beneficiation and enrichment ratio
Obtaining more than 95% of flake graphite concentrate requires a long process flow, increasing regrinding and beneficiation equipment, and a single process flow configuration is not conducive to the production of multi-specification flake graphite products

Method used

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  • Method for two-step production of medium carbon and high carbon flake graphite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , This embodiment discusses the implementation of obtaining medium-carbon flake graphite from flake graphite raw ore with low fixed carbon content.

[0029] first step:

[0030] A flake graphite raw ore has a fixed carbon content of 5.40%. After grinding, add flotation agents such as diesel, kerosene, and BK201 to adjust the slurry. The amount of diesel oil is 115g / t, the amount of kerosene is 35g / t, and the amount of BK201 is 46g / t. Adjust the slurry with water to a concentration of 24% for rough separation to obtain coarse concentrate, and obtain tailings after sweeping, and discard the tailings.

[0031] After the coarse concentrate is classified by the hydrocyclone, the first ball mill and the first flotation machine selection are carried out. The concentration of the selected foam product is 20%, and the concentration after concentration in the dense bucket is 35%, and the second time is carried out. Stirring mill for regrinding and second selection,...

Embodiment 2

[0033] This embodiment discusses the implementation of obtaining medium carbon flake graphite from flake graphite raw ore with low fixed carbon content in this embodiment.

[0034] first step:

[0035] A flake graphite raw ore has a fixed carbon content of 11.50%. After grinding, add flotation agents lime, diesel oil, and IMBC to adjust the slurry. The amount of lime is 1000g / t, the amount of diesel oil is 196g / t, and the amount of IMBC is 66g / t. Roughing and sweeping are carried out at a concentration of 20% to obtain rough concentrate and tailings, and the tailings are discarded. Coarse concentrates are graded by a spiral classifier and then ball milled and then selected again, with a concentration of 8%. The foam is added twice to concentrate, stirred, regrinded, and thrice selected to obtain a medium-carbon flake graphite concentrate with a fixed carbon content of 90.45%.

[0036] Other operations are the same as in Example 1.

Embodiment 3

[0038] This example discusses the implementation of the two-step method to obtain high-carbon flake graphite.

[0039] Step two:

[0040] Certain flake graphite raw ore obtains the concentrate foam that fixed carbon content is 88.93% after the first step operation of embodiment 1, after concentrate foam is filtered and dehydrated by plate and frame filter press, flake graphite filter cake is piled up and placed 30 days (can It can be stacked in the open air or indoors). Add medicament (amount is 1 / 4 of the amount of embodiment 1) to the flake graphite filter cake of stockpiling after pulping, under the mass concentration of 7%~8%, carry out a flotation machine selection, once selection foam enters stirring After grinding and regrinding, the secondary selection is carried out, and the underflow product of the primary selection is discharged as middling ore. Regrind the secondary beneficiation foam and carry out three beneficiation, and then add the second agitation mill regri...

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Abstract

The invention discloses a method for producing medium-carbon-content flask graphite and high-carbon-content flask graphite by a two-step method. The method comprises: step 1, crushing flake graphite raw ores, performing grinding, adding a floating agent, carrying out pulp conditioning, and then carrying out roughing separation and scavenging to obtain rough concentrates and tailings; classifying the rough concentrates, then carrying out re-grinding with a ball grinder, carrying out cleaning, concentrating the cleaned froth product, and then carrying out re-grinding and cleaning; and step 2, carrying out filtration and dehydration on medium-carbon-content flask graphite concentrates, then allowing the concentrate to stand for 15 days or more, adding an agent, carrying out pulp conditioning, and then carrying out re-grinding and cleaning in a stirring mill, thereby obtaining high-carbon-content flask graphite concentrates of which the carbon content is 95-97% and medium-carbon-content graphite with a relatively low content of fixed carbon through a two-step method cleaning process with 2-4 times of re-grinding and 3-5 times of cleaning. In the method disclosed by the invention, a flask graphite froth concentration process can improve the re-grinding effect of the concentrates, realize rapid breaking dissociation of a flask graphite combination, and shorten the re-grinding time; and the two-step method process can realize rapid enrichment of the medium-carbon-content flask graphite and shorten the cleaning flow, so that products of multiple specifications of the high-carbon-content flask graphite and the medium-carbon-content flask graphite can be obtained.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, and in particular relates to a method for beneficiating flake graphite. Background technique [0002] Flake graphite has a variety of excellent properties and is widely used in the fields of machinery, metallurgy, refractory materials and new materials. It is an important non-metallic mineral material. [0003] The fixed carbon content of flake graphite raw ore is low, between 4% and 20%, and the fixed carbon content of most flake graphite mines in China is within 10%. The flotation method is the main method for the purification of flake graphite. The flake graphite raw ore process is ball mill roughing, coarse concentrate grinding (5-7 times), multiple selection (6-8 times), concentrate foam The fixed carbon content can reach about 90%. After that, the main function of regrinding and selection of about 90% of medium-carbon graphite is to scrub, and the fixed carbon content of a single se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/205
CPCC01P2006/80
Inventor 刘海营申士富徐晨皓李崇德
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY