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Separation method of coal slurry difficult to float

A technology for slime and difficult to float, applied in flotation, solid separation and other directions, can solve the problems of low flotation recovery rate, poor hydrophobicity of difficult-to-float slime, and difficult-to-float slime, etc., and achieves significant economic benefits and easy flotation. , good effect

Active Publication Date: 2016-10-12
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a sorting method for difficult-to-float coal slime, which fundamentally solves the problem of low flotation recovery rate caused by poor hydrophobicity of difficult-to-float coal slime by introducing nano-bubbles into flotation

Method used

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  • Separation method of coal slurry difficult to float

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Effect test

Embodiment 1

[0025] Such as figure 1 , water (2) and secondary octanol foaming agent (1) are fed into the mixing tank (A) and mixed, the proportioning of water and foaming agent is 0.07g foaming agent per liter of water, and the mixture after stirring (3 ) is fed into the Venturi tube (C) through the mixture feeding pump (B), the mixture dissolves air under the negative pressure generated by the jet and generates a large number of bubbles at the end of the Venturi tube (C), and the solution containing bubbles (4) is fed to the Venturi tube (C). Enter the upper part of the defoaming barrel (D), and a baffle is installed in the middle of the defoaming barrel (D), which divides it into two parts. (D) On the right side, the large air bubbles in the mixture rise to the upper part of the defoaming barrel under the action of buoyancy and gradually burst, so that the air bubbles generated by the Venturi tube (C) are removed after passing through the defoaming barrel (D), Leave the nano-bubbles in...

Embodiment 2

[0028] Such as figure 1 , put water (2) and 2-octanol (1) into the mixing tank (A) for mixing, the proportion of water and foaming agent is 0.033g foaming agent per liter of water, and the mixture (3) after stirring is passed through the mixture The feed pump (B) feeds into the Venturi tube (C), the mixture dissolves the air under the negative pressure generated by the jet and generates a large number of bubbles at the end of the Venturi tube (C), and the bubble-containing solution (4) is fed into the defoaming On the upper part of the barrel (D), a baffle plate is installed in the middle of the defoaming barrel (D), which divides it into two parts. The two parts of the barrel are only connected to the lower part. On the right, the large bubbles in the mixture rise to the upper part of the bubble removal tank under the action of buoyancy and gradually burst, so that the bubbles generated by the Venturi tube (C) pass through the bubble removal tank (D) and the large bubbles are...

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Abstract

The invention provides a separation method of coal slurry difficult to float. A solution (5) containing nanometer bubbles is delivered to an ore pulp stirring barrel (F) through a pump (E), and an appropriate amount of coal slurry (7) and an appropriate quantity of a floatation agent (8) are delivered to the ore pulp stirring barrel (F); after being adjusted, the ore pulp (9) is delivered to a counter current static micro bubble flotation column (H) through a feeding pump (G) to perform flotation, finally two kinds of products of clean coal (10) and tail coal (11) are generated. The floatation agent is prepared from the following substances of kerosene, ethionine ester, Tween 40, sodium alcohol ether sulphate, P-toluene sulphonic acid, Span 60, phthalic diamide, sodium dodecylbenzenesulfonate and phthalic anhydride. The separation method disclosed by the invention has the beneficial effects that the nanometer bubbles and optimized agents are utilized, so that the hydrophobicity of the clean coal and the hydrophobicity of waste rocks are reinforced; the coating effect of fine coal slurry on the surfaces of coal particles is also greatly reduced by the accumulation of the nanometer bubbles, so that the pollution of the fine coal slurry is significantly reduced and the recovery rate of the clean coal is improved.

Description

technical field [0001] The invention relates to a coal slime sorting technology, and in particular provides a sorting method for difficult-to-float coal slime. Background technique [0002] With the improvement of my country's coal mining mechanization, the deterioration of resource geological conditions, the large-scale construction of coal preparation plants and the wide application of dense medium separation technology, the proportion of high-ash refractory coal slime has increased sharply and continues to deteriorate. The contradiction of sorting is more prominent. At present, flotation is one of the most important methods to deal with coal slime. In the conventional flotation process, the coal particles with better hydrophobicity collide with the air bubbles and adhere to the air bubbles, and float with the air bubbles to the foam phase, and finally become buoyant coal particles. Clean coal; and gangue particles with poor hydrophobicity are difficult to adhere to or can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/016B03D1/008B03D1/02B03D101/02B03D101/04B03D103/08
CPCB03D1/008B03D1/016B03D1/02B03D2201/02B03D2201/04B03D2203/08
Inventor 桂夏辉邢耀文李臣威曹亦俊杨自立王东岳
Owner CHINA UNIV OF MINING & TECH
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