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Method for forming coal particles through hydrophobic agglomeration

A technology of agglomeration and coal particles, applied in the field of preparation of ultra-pure coal by hydrophobic agglomeration

Pending Publication Date: 2021-10-12
山西沁新能源集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, ultra-pure coal with an ash content below 1% has not been sorted by this method.

Method used

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  • Method for forming coal particles through hydrophobic agglomeration
  • Method for forming coal particles through hydrophobic agglomeration
  • Method for forming coal particles through hydrophobic agglomeration

Examples

Experimental program
Comparison scheme
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preparation example Construction

[0019] A method for preparing hydrophobic agglomerated coal particles, comprising:

[0020] (1) Grinding the flotation concentrate, the particle size distribution after the flotation concentrate grinding and dissociation is: d 10 =3μm±2μm;

[0021] (2) The coal sample after grinding and dissociation and the flocculant are dispersed in water to obtain the coal sample after the agglomeration, the flocculant includes emulsified kerosene, and the particle size distribution of the coal degree of the agglomeration is: d 10 =35 μm±2 μm.

[0022] The emulsified kerosene includes kerosene and water. Preferably, the mass ratio of water and kerosene in the emulsified kerosene is 3.5:1˜5:1.

[0023] In step (1), the preparation method of the flotation concentrate includes: dispersing the flotation clean coal in water, adding a flotation agent to carry out flotation scraping.

[0024] The flotation scraping time is controlled at 1.5min to 3min.

[0025] After the flotation clean coal ...

Embodiment 1

[0062] The X-ray diffraction pattern of raw flotation clean coal shows diffraction peaks appearing at 8.75°, 17.58°, 19.76°, 20.86°, 26.64°, 36.54° and 50.14°, as shown in the attached figure 1 . Particle size distribution of gangue minerals d 50 = 11.48 μm, d 90 = 40.22 μm.

[0063] (1) Disperse the flotation clean coal in the flotation tank, the pulp concentration is 10%, add an appropriate amount of emulsified kerosene 0.5%, sodium lignosulfonate 500g / t, methyl isobutyl carbinol 25g / t in the pulp, Flotation scraping, to separate some coal particles and gangue particles in the flotation clean coal to obtain flotation concentrate, the ash content of which is 3.94%.

[0064] (2) The flotation concentrate obtained in step 1 is ground and dissociated in a planetary ball mill, and the particle size distribution of the coal sample ash after grinding is d 10 = 3.124 μm, d 50 = 13.253 μm, d 90 = 62.341 μm.

[0065] (3) Disperse the coal sample after grinding and dissociation ...

Embodiment 2

[0069] The X-ray diffraction patterns of raw flotation clean coal are shown at 8.75°, 17.58°, 19.76°, 20.86°, 22.93°, 25.43°, 26.64°, 27.35°, 31.37°, 35.54°, 36.54°, 38.65°, 40.82° ° and 50.14 ° of diffraction peaks, as shown in the attached image 3 . Particle size distribution of gangue minerals d 50 = 40.27 μm, d 90 = 241.91 μm.

[0070] (1) Disperse the flotation clean coal in the flotation tank, the pulp concentration is 10%, add an appropriate amount of emulsified kerosene 0.5%, sodium lignosulfonate 500g / t, methyl isobutyl carbinol 25g / t in the pulp, Flotation scraping, to separate part of the coal particles and gangue particles in the flotation clean coal to obtain flotation concentrate, the ash content of which is 5.50%.

[0071] (2) Step 1 obtains the flotation concentrate and carries out grinding and dissociation, and the particle size distribution of the coal sample ash after grinding is attached Figure 5 .

[0072] (3) Disperse the coal sample after grindin...

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Abstract

The invention relates to a method for forming coal particles through hydrophobic agglomeration. The method comprises the following steps of: preparing ultra-pure coal from coal particles through flotation, and finely grinding flotation clean coal to obtain fine coal slime so as to realize full monomer dissociation of the mineral particles; carrying out selective hydrophobic agglomeration on the fine coal particles; and finally, separating hydrophobic agglomerated coal particles from ores by using a flotation machine to obtain the ultra-pure coal with the ash content of less than 1%.

Description

technical field [0001] The invention relates to a method for preparing ultra-pure coal, in particular to a method for preparing ultra-pure coal by hydrophobic agglomeration. Background technique [0002] With the depletion of fossil fuel reserves and the adverse impact of their use on the environment, more and more people are aware of the necessity of developing clean energy. Lithium-ion batteries are currently the most ideal rechargeable and recyclable secondary batteries. Because of their high energy, long life, and low energy consumption, they have been widely used in consumer electronics, electric transportation, aerospace and other fields. Graphite electrodes are commonly used as anode materials for commercial lithium batteries due to their excellent electrical conductivity, structural stability, and cycle performance. At present, graphite electrodes are mainly prepared by graphitization of petroleum coke, and the preparation of graphite electrodes with relatively chea...

Claims

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Application Information

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IPC IPC(8): B03D1/00B03D1/008B03D103/08
CPCB03D1/00B03D1/008B03D2203/08B03D2201/002
Inventor 王志宏佟磊
Owner 山西沁新能源集团股份有限公司
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