Method and device for reinforcing oil bubble column floatation process of low-order coal

A flotation process, kerosene technology, applied in flotation, solid separation, etc., can solve the problems of poor selectivity, high collector consumption, etc., achieve good surface properties, good resource recovery, and increase economic and environmental benefits

Inactive Publication Date: 2014-07-30
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a low-rank kerosene bubble column flotation process strengthening method and device to solve the problems of high consumption and poor selectivity of the existing low-rank coal flotation hydrocarbon oil collectors

Method used

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  • Method and device for reinforcing oil bubble column floatation process of low-order coal

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Embodiment 1

[0017] Embodiment 1: The strengthening method is as follows: the air compressor 1 compresses the dry air sucked and stores it in the air storage tank 2, and controls the output airflow flow through the gas flow meter I3; Form In the atomizer 4, the hydrocarbon oil collector 5 mixed with a certain amount of surfactant is atomized into a large number of oil mist airflows with a particle size of 1-50 μm; The inner cavity of the evaporator 6 is heated and controlled at the boiling point temperature of hydrocarbon oil; the oil-containing evaporated gas and air enter the flotation column 11 through the gas input end of the bubble generator 10, and when the gas filling amount required for column flotation is insufficient, the gas is passed through The flow meter II8 adjusts the flow rate of the air 9 required; after the low-rank coal is pre-wetted at a certain concentration in the mixing tank 12, it is pumped into the flotation column 11 through the feed pump 13, and is discharged thr...

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Abstract

The invention discloses a method and a device for reinforcing an oil bubble column floatation process of low-order coal, and belongs to floatation methods and floatation devices for the low-order coal. The method comprises the following steps: (1) adding a surfactant into a hydrocarbon oil collecting agent proportionally; (2) atomizing hydrocarbon oil mixed with the surfactant into oily mist beads in an atomizer by using air flow provided by an air compressor; (3) heating the air flow of the oily mist beads in a tubular temperature control evaporator until the temperature reaches hydrocarbon oil evaporation temperature to form oil evaporation gas; (4) mixing the heated oil evaporation gas with air, feeding the mixture into a bubble generator, and forming modified oil bubbles by wrapping bubbles with thin surfactant-modified hydrocarbon oil layers under the jet action of the bubble generator; (5) pre-wetting and uniformly mixing the low-order coal in a stirring barrel, and pumping the low-order coal into a floatation column; (6) in the floatation column, mineralizing the modified oil bubbles and low-order coal particles, carrying clean coal to float up by using the modified oil bubbles as carriers, and keeping tailings and high-ash fine silt which are not mineralized in the column to obtain the clean coal and the tailings. The method and the device have the advantages that the consumption of the hydrocarbon oil collecting agent is reduced; the floatation selectivity and the recovery rate of the low-order coal are improved.

Description

technical field [0001] The invention relates to a low-rank coal flotation method and device, in particular to a low-rank kerosene bubble column flotation process strengthening method and device. Background technique [0002] my country's low-rank coal resources are abundant, accounting for about 45.68% of my country's total coal resources. With the increase of development intensity, low-rank coal has become an important part of my country's coal energy production and supply, but the rapid increase in the amount of slime caused by the mechanized mining of low-rank coal requires the use of flotation and other methods for upgrading and utilization . In conventional flotation, air bubbles are used as the coal particle carrier, and hydrocarbon oil collectors are directly added to the coal slurry. Because the surface of low-rank coal contains a large number of oxygen-containing functional groups, and the porosity is large, the floatability is poor, and the hydrocarbon oil is signi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/02B03D1/14
Inventor 陶秀祥屈进州唐龙飞何环曾维晨亢旭
Owner CHINA UNIV OF MINING & TECH
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