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Collector for flotation of oxidized coal slime, preparation method, and flotation method

A coal slime flotation and collector technology, applied in flotation, solid separation and other directions, can solve the problems of low separation efficiency, high chemical consumption and flotation cost, and achieve improved flotation efficiency, mature trading market, and high price. low cost effect

Active Publication Date: 2020-02-28
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 analysis, the present invention aims to provide a collector for the flotation of oxidized coal slime and its preparation method and flotation method, which solves the reagent consumption and flotation of oxidized coal slime flotation in the prior art. Problems of high cost and low sorting efficiency

Method used

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  • Collector for flotation of oxidized coal slime, preparation method, and flotation method
  • Collector for flotation of oxidized coal slime, preparation method, and flotation method
  • Collector for flotation of oxidized coal slime, preparation method, and flotation method

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preparation example Construction

[0040] Specifically, the above preparation method includes the following steps:

[0041] Add diethylene oxide and C 7 ~C 9 The aromatic ether is added to the hydrocarbon oil, stirred for more than 15 minutes (for example, 15-25 minutes), and mixed uniformly to obtain the above-mentioned oxidized coal slime flotation collector.

[0042] The invention also provides a flotation method for oxidized coal slime. The oxidized coal slime is formulated into a flotation slurry, the collector and foaming agent are added to the flotation slurry for stirring, and then flotation is separated to obtain Flotation clean coal and flotation tailings.

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

[0044] As the collector of oxidized coal slime flotation can be C 10 ~C ...

Embodiment 1

[0067] Coal slime properties: The deep oxidized coal sample comes from an open coal storage yard in a mining area in Inner Mongolia, and the ash content of the coal slurry is 30%. The particle size of the coal sample is relatively fine, and -0.074mm size slime accounts for 60% of the coal sample.

[0068] Operating conditions: 1.5L XFD type hanging trough 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 slurry (pulp concentration 80g / L), add a collector and stir for 3 minutes, add a foaming agent, sec-octanol, and stir for 30 seconds, then add gas (Flotation machine inflation volume J g 0.8cm / s) After foaming for 3 minutes, the scraped foam and the residue at the bottom of the tank are the flotation clean coal and the flotation tailing coal. They are filtered, dried and weighed respectively, and the product combustible recovery rate is calculated. Table 2 show...

Embodiment 1-1

[0070] In Example 1-1, in terms of mass fraction, the ratio of the flotation collector was 75% diesel, 5% diethylene oxide, and 20% mixture of anisole, phenylethyl ether and phenylpropyl ether. The preparation process is as follows: the mixture of diesel oil, diethylene oxide, anisole, phenylethyl ether and phenylpropyl ether is mixed in proportion, and then stirred at a speed of 1000 rpm for 15 minutes to obtain the flotation collector.

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Abstract

The invention discloses a collecting agent for coal slime flotation of oxidized coal, a preparation method of the collecting agent and a flotation method, and belongs to the technical field of coal slime flotation. The problems of high reagent consumption, high flotation cost and low separation efficiency of coal slime flotation of oxidized coal. The collecting agent comprises C<10>-C<22> hydrocarbon oil and an accelerator. The accelerator comprises ethylene oxide and C<7>-C<9> aromatic ether. The collecting agent is prepared from the raw materials by mass: 75%-80% of C<10>-C<22> hydrocarbon oil, 5%-12% of ethylene oxide and 8%-20% of C7-C9 aromatic ether. The preparation method comprises the following steps that the C<10>-C<22> hydrocarbon oil, the ethylene oxide and the C<7>-C<9> aromatic ether are uniformly mixed to obtain the collecting agent for coal slime flotation of oxidized coal. The flotation method comprises the following steps that coal slime flotation of oxidized coal is prepared into flotation pulp, the collecting agent and a foaming agent are sequentially added into the flotation pulp for stirring, and then flotation separation is carried out to obtain flotation clean coal and flotation tail coal. The collecting agent for coal slime flotation of oxidized coal, the preparation method of the collecting agent and the flotation method are used for coal slime flotation of oxidized coal.

Description

Technical field [0001] The invention relates to a coal slime flotation technology, in particular to a collector for oxidized coal slime flotation, a preparation method and a flotation method. Background technique [0002] Oxidized coal is coal that is produced in any stage of a series of processes in which the coal is spontaneously ignited and carbon dioxide is produced by adsorbing oxygen from coal to change its surface properties under certain environmental conditions. Flotation is one of the effective methods to reduce ash and improve quality of oxidized coal slime. Flotation of oxidized coal slime using conventional flotation hydrocarbon oil (such as diesel, kerosene, etc.) as a collector has problems such as high chemical consumption and high flotation cost, which leads to long-term waste of most oxidized coal. Causes many problems such as serious waste of coal resources and serious environmental pollution. [0003] Chinese invention patent application CN106799310A discloses...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/008B03D101/02B03D103/08
CPCB03D1/008B03D2201/02B03D2203/08
Inventor 王磊王永田郎军刘炯天廖寅飞李国胜黄鲁华
Owner CHINA UNIV OF MINING & TECH
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