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Oxidized coal slime flotation collector and preparation method and flotation method

A coal slime flotation and collector technology, applied in flotation, solid separation, etc., can solve the problems of low sorting efficiency, reagent consumption and high flotation cost, so as to improve the flotation efficiency, mature the trading market, improve The effect of hydrophobicity

Active Publication Date: 2020-02-14
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned analysis, the present invention aims to provide a collector for flotation of oxidized coal slime and its preparation method and flotation method, which solves the problems of high agent consumption and flotation cost of oxidized coal slime flotation in the prior art, The problem of low sorting efficiency

Method used

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  • Oxidized coal slime flotation collector and preparation method and flotation method
  • Oxidized coal slime flotation collector and preparation method and flotation method
  • Oxidized coal slime flotation collector and preparation method and flotation method

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preparation example Construction

[0040] Specifically, the above-mentioned preparation method comprises the following steps:

[0041] Tetrahydrofuran and C 7 ~C 9 The aromatic aldehyde is added into the hydrocarbon oil, stirred for more than 15 minutes (for example, 15-25 minutes), and after mixing evenly, the above-mentioned oxidized coal slime flotation collector is obtained.

[0042] The present invention also provides a flotation method for flotation of oxidized coal slime. The oxidized coal slime is formulated into flotation pulp, and the above-mentioned collector and foaming agent are added to the flotation pulp for stirring, and then flotation Separation to obtain flotation clean coal and flotation tailings.

[0043] Compared with the prior art, the beneficial effect of the oxidized coal slime flotation method provided by the present invention is basically the same as that of the above-mentioned oxidized coal slime flotation collector, and will not be repeated here.

[0044] Since oxidized coal slime...

Embodiment 1

[0068] Coal slime properties: The deeply oxidized coal sample comes from an open-pit coal storage yard in a mining area in Inner Mongolia, and the ash content of the coal slime is 30%. The particle size of the coal sample is relatively fine, and the -0.074mm particle size coal slime accounts for 60% of the coal sample.

[0069] Operating conditions: 1.5L XFD type hanging cell flotation machine is used, and the spindle speed is 2000rpm. Weigh 120g of dry coal slime and pour it into a flotation tank filled with tap water to prepare a flotation pulp (pulp concentration 80g / L), add collector and stir for 3min, add foaming agent 2-octanol and stir for 30s, then pass in gas (Aeration volume of flotation machine J g 0.8cm / s) after scraping for 3 minutes, the scraped foam and the residue at the bottom of the tank are flotation clean coal and flotation tailings, which are filtered, dried and weighed respectively, and the recovery rate of product combustibles is calculated. Table 2 s...

Embodiment 1-1

[0071] In Example 1-1, in terms of mass fraction, the ratio of the flotation collector is 75% of diesel oil, 5% of tetrahydrofuran, and 20% of the mixture of benzaldehyde, phenylacetaldehyde and phenylpropionaldehyde. The preparation process is as follows: after mixing diesel oil, tetrahydrofuran, benzaldehyde, phenylacetaldehyde and phenylpropionaldehyde mixture in proportion, stirring at a speed of 1000 rpm for 15 minutes to obtain the flotation collector.

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Abstract

The invention discloses an oxidized coal slime flotation collecting agent, a preparation method and a flotation method, belongs to the technical field of coal slime flotation, and solves the problemsof high reagent consumption and flotation cost and low separation efficiency in the oxidized coal slime flotation. The collecting agent comprises C10-C22 hydrocarbon oil and an accelerating agent; theaccelerating agent comprises tetrehydrofuran and C7-C9 aromatic aldehyde; and the mass percentages of the components are as follows: 75-80% of C10-C22 hydrocarbon oil, 5-12% of tetrehydrofuran and 8-20% of C7-C9 aromatic aldehyde. The preparation method is to obtain the oxidized coal slime flotation collecting agent through uniform mixing of the C10-C22 hydrocarbon oil, the tetrehydrofuran and the C7-C9 aromatic aldehyde. The floatation method is to obtain flotation clean coals and flotation tailing coals after preparation of oxidized coal slime as flotation pulp, adding of the collecting agent and a foaming agent in the floatation pulp for stirring and flotation separation. The oxidized coal slime flotation collecting agent, the preparation method and the flotation method are used for the oxidized coal slime flotation.

Description

technical field [0001] The invention relates to a coal slime flotation technology, in particular to an oxidized coal slime flotation collector, a preparation method and a flotation method. Background technique [0002] Oxidized coal is a coal produced in any process of a series of processes in which the coal absorbs oxygen to change the surface properties of the coal and spontaneously ignites to generate carbon dioxide under specific environmental conditions. Flotation is one of the effective methods to reduce ash and improve the quality of oxidized coal slime. Using flotation conventional hydrocarbon oils (such as diesel oil, kerosene, etc.) as collectors to flotation oxidized coal slime has problems such as high reagent consumption and high flotation costs, resulting in most of the oxidized coal being in a long-term waste state. Cause serious waste of coal resources and serious environmental pollution and many other problems. [0003] Chinese invention patent application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/008B03D1/02B03D101/02
CPCB03D1/008B03D1/02B03D2201/02
Inventor 王磊王永田郎军刘炯天廖寅飞李国胜朱慧娟
Owner CHINA UNIV OF MINING & TECH
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