A kind of slime flotation agent and preparation method thereof

A coal slime flotation and selection technology, which is applied in flotation, solid separation and other directions, can solve the problems of complex preparation process, reduce the amount of collectors, high cost, etc., achieve good selection performance, enhance flotation efficiency, improve Environmentally friendly effects

Active Publication Date: 2022-07-12
CHINA UNIV OF MINING & TECH (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Patent document CN111068923B discloses a coal slime flotation collector, which includes the hydrolyzate and emulsifier after the addition of methyl oleate and maleic anhydride, which is very easy to disperse in water during use, reducing the collection The dosage of the agent, under the same dosage, the collection efficiency of the microemulsion coal slime collector prepared by it is higher, but it has the disadvantages of high cost and complicated preparation process

Method used

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  • A kind of slime flotation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Hydrophobically Modified Polyvinyl Alcohol A

[0040] Dissolve polyvinyl alcohol and hexanoyl chloride in an appropriate amount of dichloromethane according to the mass ratio of 1:6, add triethylamine with 1.1 times the molar amount of hexanoyl chloride, and react for 1-2 hours; the product is washed in turn to remove impurities to obtain hydrophobic modification polyvinyl alcohol.

[0041] Preparation of flotation agent A

[0042] Flotation Agent A is made of the following components:

[0043] Rapeseed Oil: 20 servings

[0044] Kerosene: 40 servings

[0045] Ethylene glycol: 15 parts

[0046] Dodecyldimethylamine: 5 parts

[0047] Dimethyl sulfate: 10 parts

[0048] Hydrophobically modified polyvinyl alcohol A: 5 parts

[0049] 33wt% NaOH: 2.5 parts

[0050] Sodium sulfosalicylate: 2.5 parts

[0051] Its preparation process is as follows:

[0052] (1) under the ice-water mixture temperature, the rapeseed oil, ethylene glycol, dodecyl dimethy...

Embodiment 2

[0055] Preparation of flotation agent B

[0056] Other conditions and operations are the same as in Example 1, except that the same mass of octanoyl chloride is used instead of hexanoyl chloride.

Embodiment 3

[0058] Preparation of flotation agent C

[0059] Other conditions and operations are the same as in Example 1, except that the same mass of decanoyl chloride is used instead of hexanoyl chloride.

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Abstract

The invention provides a slime flotation agent, which is composed of natural oil, kerosene, ethylene glycol, long-chain alkyl organic amine, dimethyl sulfate, hydrophobically modified polyvinyl alcohol, lye and sulfosalicylic Hydrophobically modified polyvinyl alcohol is especially added, which can increase the surface contact angle between coal particles and reagents and improve the hydrophobicity of the surface of coal particles; the added organic amine and dimethyl sulfate form a quaternary Ammonium salt cation can improve the cationicity of the flotation agent, adjust the surface properties of the solution, make the kerosene evenly dispersed in the water, increase the coverage area of ​​the kerosene on the surface of the coal particles, and enhance the flotation efficiency.

Description

technical field [0001] The invention relates to the technical field of mining agents, in particular to a coal slime flotation agent and a preparation method thereof. Background technique [0002] Coal is an important guarantee for the sustainable and healthy development of the national economy. Impurities in coal not only adversely affect product quality during coal processing and utilization, but also cause serious air pollution. In today's highly mechanized production of coal preparation plants, the content of coal slime has increased significantly, and the sorting of fine coal slime has become an important part of coal processing. The most effective means of slime separation is flotation. Therefore, flotation reagents are the key technical points that can be strengthened in the process of slime flotation. [0003] A lot of research has been done on flotation agents in the prior art, for example: patent document CN101385996B discloses a slime flotation agent and its prep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D101/02B03D103/08
CPCB03D1/018B03D2203/08B03D2201/02
Inventor 解维伟周建明
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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