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Refractory gasified slag flotation separation method based on residual carbon particle pore filling

A technology of pore filling and gasification slag, which is applied in flotation, solid separation, etc., can solve the problems of large voids, gasification slag with many pores, and cannot be well adapted to the problem of gasification slag flotation and separation, and achieves low price , Strengthen the effect of the flotation process

Active Publication Date: 2021-09-07
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gasification slag has many voids, the porosity is as high as 60%, and the large voids affect the contact and adhesion of gasification slag to a certain extent, but simply improving the hydrophobicity cannot be well adapted to the flotation and separation of gasification slag.

Method used

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  • Refractory gasified slag flotation separation method based on residual carbon particle pore filling
  • Refractory gasified slag flotation separation method based on residual carbon particle pore filling
  • Refractory gasified slag flotation separation method based on residual carbon particle pore filling

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Experimental program
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Effect test

Embodiment 1

[0031] Such as figure 1 As shown, a refractory gasification slag flotation separation method based on pore filling of carbon residue particles, the steps are as follows:

[0032] S1. Gasification slag pre-grinding, the average particle size of gasification slag after pre-grinding is less than 0.045mm; mix the gasification slag after pre-grinding with hydrophobic particles at a mass ratio of 100:1-6, and then add it to the ball mill , grinding for 15 minutes; the hydrophobic particles are ultrafine graphite, ultrafine clean coal and other particles with a carbon mass fraction higher than 95%, and the particle size of the hydrophobic particles is 1-2 μm;

[0033] S2. Put the product of S1 into the flotation machine, add water 15-40 times the product quality and stir evenly to form a slurry, so that the mineral particles are suspended in the water;

[0034] S3. Add a non-polar hydrocarbon oil collector to the flotation machine, and use an alcohol foaming agent to heat for 2-5 mi...

Embodiment 2

[0038] The gasification slag raw material with an ash content of 80-81% was used as the test material, and the following tests were carried out:

[0039] 1. The test group carries out gasification slag flotation separation with the method of the present invention, and the process is as follows:

[0040] S1. Mix 49g of the gasification slag sample after grinding with 1g of ultra-fine graphite particles evenly, put it into a ball mill, grind for 15min and collect the samples after grinding.

[0041] S2. After the ore grinding, the sample is added to a 1L mechanically stirred flotation machine in the laboratory, and water is added to open the flotation machine, the air inlet valve is closed, and stirred for 2 minutes.

[0042] S3. Add 0.15g of diesel oil to the above flotation machine as a collector, and at the same time, put 0.2g of methyl isobutyl carbinol as a foaming agent into a 50mL heater and heat at 120°C, and continue to stir for 3min ;

[0043] S4. Connect the air out...

Embodiment 3

[0052] Adopt the same material and method as embodiment 2, adjust the diesel oil in the collector to be kerosene, record the flotation contrast test result as shown in table 2 below:

[0053] Table 2 flotation comparison test results

[0054]

[0055] The result of data comparison shows that compared with the traditional method, the concentrate flotation yield of the present invention is increased by 15.43%, which proves that the flotation method provided by the present invention has a better effect.

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Abstract

The invention relates to the technical field of gasified slag flotation, in particular to a refractory gasified slag flotation separation method based on residual carbon particle pore filling. The refractory gasified slag flotation separation method based on residual carbon particle pore filling is characterized in that gasified slag and a certain amount of carbon-containing superfine hydrophobic particles are mixed and then added into a ball mill for ore grinding, then the mixture is put into a flotation machine, then a high-temperature vaporized foaming agent is utilized, air is used for carrying the vaporized foaming agent to enter the flotation machine, flotation is completed together with a collecting agent, and finally flotation concentrate and tailings are collected. According to the refractory gasified slag flotation separation method based on residual carbon particle pore filling, the carbon-containing superfine hydrophobic particles are embedded into pores of the gasified slag in the ore grinding stage, treatment is combined with the vaporizing foaming agent, waste caused by the fact that the foaming agent enters the pores can be reduced, and therefore the whole flotation process of the gasified slag can be efficiently carried out.

Description

technical field [0001] The invention relates to the technical field of gasification slag flotation, in particular to a method for flotation separation of refractory gasification slag based on pore filling of residual carbon particles. Background technique [0002] Coal gasification technology is an important part of clean coal technology. However, in the process of coal gasification, because the air filling rate does not reach 100%, some substances in the gasified raw coal cannot be completely combusted, so as the coal slag gas overflows the gasifier, gasification non-ash is formed, or it is mixed with molten tail ash The mixture of substances is discharged from the bottom of the furnace. In my country, the amount of gasification ash formed every year reaches tens of millions of tons, a large part of which is accumulated in the ash storage yard, occupying a large amount of land area, and the ash contains a variety of complex metal elements, which not only reduces the The ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B9/00B03D1/00B03D1/008B03D1/016B03D101/02B03D101/04
CPCB03B9/00B03D1/00B03D1/008B03D1/016B03D2201/02B03D2201/04Y02W30/91
Inventor 王海楠张海军田全志闫小康李丹龙陈瑞丰赵振洋
Owner CHINA UNIV OF MINING & TECH
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