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Low-rank coal slime flotation collector compounded with ester aldehyde ether and its preparation method and application

A coal slime flotation and collector technology, applied in flotation, solid separation and other directions, can solve the problems of increasing toxic and harmful components, easily endangering the ecological environment, and increasing industrial costs, so as to improve flotation efficiency and simplify flotation. process, the effect of reducing drug consumption

Active Publication Date: 2021-04-27
CHINA SHENHUA ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still deficiencies such as many components and complex components, which lead to complex components of mineral processing wastewater and increased toxic and harmful components, which not only increases industrial costs, but also easily endangers the ecological environment.

Method used

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  • Low-rank coal slime flotation collector compounded with ester aldehyde ether and its preparation method and application
  • Low-rank coal slime flotation collector compounded with ester aldehyde ether and its preparation method and application
  • Low-rank coal slime flotation collector compounded with ester aldehyde ether and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Coal slime properties: The coal sample comes from the high-aluminum long-flame coal of Shenhua Zhuneng Heidaigou Coal Preparation Plant, the inner ash of the coal slime is high, and the ash content of the incoming coal slime is 37%. 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.

[0041] 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 (inflated volume 0.25m 3 / h) after scraping and foaming 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 pr...

Embodiment 1-1

[0043] In Example 1-1, in terms of mass fraction, the proportioning of the flotation collector is 78% of diesel oil, 7% of butyl benzoate, 5% of n-valeraldehyde, and 10% of n-pentyl ether. The preparation process is as follows: after mixing diesel oil, butyl benzoate, n-valeraldehyde and n-pentyl ether in proportion, stirring at a speed of 1000 rpm for 15 minutes to obtain the flotation collector.

Embodiment 1-2

[0045] Embodiment 1-2 is similar to Embodiment 1-1, the only difference is that the collector ratio is: 60% of diesel oil, 15% of butyl benzoate, 10% of n-valeraldehyde, and 15% of n-amyl ether.

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Abstract

The invention provides a low-order coal slime flotation collector compounded with ester aldehyde ether and its preparation method and application. The collector has simple composition and can be used as a low-rank coal slime flotation collector to complete conventional The economical and efficient separation of flotation has the characteristics of small chemical consumption, low flotation cost and high separation efficiency. The low-rank coal slime flotation collector of compound ester aldehyde ether provided by the invention comprises each component of following mass percent: C 10 -C 16 Hydrocarbon oil 60‑85%; C 10 -C 18 Esters 5‑15%; C 5 -C 9 Aldehyde 5‑15%; C 4 -C 10 Ether 5‑15%.

Description

technical field [0001] The invention relates to the technical field of coal slime flotation, in particular to a low-rank coal slime flotation collector and its preparation method and application. Background technique [0002] Low-rank coal is coal with a low degree of metamorphism, mainly including lignite, long-flame coal, weakly caking coal, non-caking coal, etc., accounting for more than 50% of my country's coal reserves. Among them, -0.5mm fine-grained coal is called low-rank coal slime, which has outstanding characteristics such as poor hydrophobicity, fine particle size, and large specific surface area. Flotation, as the most widely used method for separating fine-grained minerals, can effectively reduce ash and improve the quality of fine-grained coal slime, and increase its utilization value. However, conventional collectors (such as diesel oil, kerosene, etc.) used in the flotation of low-rank coal slime have problems such as high chemical consumption and high flot...

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 朱子祺张佳彬关丙火乔军强王义栓王芳侠
Owner CHINA SHENHUA ENERGY CO LTD
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