Method for treating high-sodium high-inertinite coal

An inert, high-sodium technology, applied in the field of enrichment of coal microcomponents, can solve the problem of low enrichment rate of microcomponents, achieve the improvement of recovery rate and enrichment ratio of vitrinite, and improve the stability of bubbles , evenly distributed effect

Pending Publication Date: 2022-02-18
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the high-efficiency reagent system and flotation process parameters that are compatible with the differences in surface properties between coal and rock components are still not fully understood, the enrichment rate of microscopic components obtained by the current flotation separation method is relatively low

Method used

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  • Method for treating high-sodium high-inertinite coal
  • Method for treating high-sodium high-inertinite coal
  • Method for treating high-sodium high-inertinite coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The high-sodium and high-inertite coal is crushed by a crusher to an average particle size of less than 500 μm, and 80 g of crushed fine-grained raw coal is weighed and poured into the flotation tank 5 and mixed with water to prepare a coal slurry with a concentration of 80 g / L. Selector 4 stirred at a speed of 2000r / min for 30s, and then stirred at a speed of 0.125m 3 / h volume flow from CO 2 Gas cylinder 1 fills flotation cell 5 with CO with a purity of 99.999% 2 gas, and filled with CO 2 While stirring, stop aerating after 3 minutes and add MB compound collector, the dosage of MB compound collector is 2000g / t, after stirring for 2 minutes, add fusel oil foaming agent, the dosage of fusel oil foaming agent is 500g / t , after stirring for 20s with 0.125m 3 / h volume flow from CO 2 Gas cylinder 1 fills flotation cell 5 with CO with a purity of 99.999% 2 Gas and start to scrape bubbles, scrape bubbles for 5min. The flotation clean coal and tailing coal were suction ...

Embodiment 2

[0042] The high-sodium and high-inertite coal is crushed by a crusher to an average particle size of less than 500 μm, and 80 g of crushed fine-grained raw coal is weighed and poured into the flotation tank 5 and mixed with water to prepare a coal slurry with a concentration of 80 g / L. Selector 4 stirred at a speed of 2000r / min for 30s, and then stirred at a speed of 0.125m 3 / h volume flow from CO 2 Gas cylinder 1 fills flotation cell 5 with CO with a purity of 99.999% 2 gas, and filled with CO 2While stirring, stop aerating after 3 minutes and add MB compound collector. The dosage of MB compound collector is 3000g / t. After stirring for 2 minutes, add 2-octanol foaming agent. The dosage of 2-octanol foaming agent is 1000g / t , after stirring for 20s with 0.125m 3 / h volume flow from CO 2 Gas cylinder 1 fills flotation cell 5 with CO with a purity of 99.999% 2 Gas and start to scrape bubbles, scrape bubbles for 5min. The flotation clean coal and tailing coal were suction ...

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Abstract

The invention discloses a method for treating high-sodium high-inertinite coal. The method comprises the following steps: crushing and grinding coal into fine-grain raw coal with the particle size of 5-500 microns; then mixing fine-grained raw coal with water to prepare coal slurry with the concentration of 80-100g / L, and stirring the coal slurry for 30 seconds; filling CO2 gas into the coal slurry, stirring the coal slurry while filling the CO2 gas, and stopping filling the CO2 gas after 3-10 minutes; adding a collecting agent into the coal slurry, and stirring the coal slurry for 2 min; adding a foaming agent into the coal slurry, and stirring the coal slurry for 20-60 seconds; filling CO2 gas into the coal slurry for bubble scraping flotation, the bubble scraping flotation time being 5-10 min. According to the method for treating the high-sodium and high-inertinite coal provided by the invention, the coal slurry is pretreated by CO2, so that the sodium removal rate of the coal sample is remarkably improved while the recovery rate and the enrichment ratio of the vitrinite are improved. The method has important significance on comprehensive utilization of the high-sodium and high-inertinite coal and environmental protection.

Description

technical field [0001] The invention relates to the technical field of coal microcomponent enrichment, in particular to a method for processing high-sodium and high-inertite coal. Background technique [0002] The Zhundong coalfield in Xinjiang, my country has a predicted reserve of 390 billion tons of coal resources, and the current cumulative proven coal resource reserves are 213.6 billion tons, which is currently the largest integrated coal field in my country. Zhundong coal is mainly non-caking coal, which has the characteristics of low ash, high heat, high inertite, high alkali and alkaline earth metals. Na and other alkali metals in Zhundong coal will exist in the flue gas in the form of steam after combustion, which will easily lead to many problems such as slagging and contamination of the boiler; high inertinite content will not only reduce the liquefaction capacity of coal, but also It will increase the difficulty of preparing high-concentration coal-water slurry,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/14B03B1/00
CPCB03D1/14B03B1/00
Inventor 倪中海苏金水张丽芳王磊张博李孟乐卓相宇
Owner CHINA UNIV OF MINING & TECH
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