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Collecting agent for coal slime flotation of oxidized coal, preparation method of collecting agent and flotation method

A coal slime flotation and collector technology, applied in flotation, solid separation and other directions, can solve the problems of low sorting efficiency, high consumption of chemicals and flotation costs, and achieve improved flotation efficiency, mature trading market, and reduced costs. The effect of potion consumption

Active Publication Date: 2019-01-11
CHINA UNIV OF MINING & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Collecting agent for coal slime flotation of oxidized coal, preparation method of collecting agent and flotation method
  • Collecting agent for coal slime flotation of oxidized coal, preparation method of collecting agent and flotation method
  • Collecting agent for coal slime flotation of oxidized coal, preparation method of collecting agent and flotation method

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preparation example Construction

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

[0041] Sequentially diethylene oxide and C 7 ~C 9 The aromatic ether is added into 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 present invention also provides a method for flotation of oxidized coal slime. The oxidized coal slime is prepared into flotation slurry, the collector and foaming agent are added to the flotation slurry for stirring, and then separated by flotation 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 flotation collectors ...

Embodiment 1

[0067] 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.

[0068] 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

[0070] In Example 1-1, in terms of mass fraction, the proportioning of the flotation collector is 75% of diesel oil, 5% of diethylene oxide, and 20% of the mixture of anisole, phenetole and phenpropyl ether. The preparation process is as follows: mix diesel oil, diethylene oxide, anisole, phenetole and phenpropyl ether in proportion, and stir at 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 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 applicat...

Claims

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Application Information

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Patent Type & Authority Applications(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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