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

A coal slime flotation and collector technology, which is applied in flotation, solid separation and other directions, can solve the problems of increasing toxic and harmful components, easily harming the ecological environment, and complex wastewater components, so as to reduce the cost of chemicals and simplify the flotation process. , Improve the effect of flotation efficiency

Active Publication Date: 2021-03-30
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 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 acid aldehyde ether and its preparation method and application
  • Low-rank coal slime flotation collector compounded with acid aldehyde ether and its preparation method and application
  • Low-rank coal slime flotation collector compounded with acid aldehyde ether and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 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.

[0038] 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

[0040] In Example 1-1, in terms of mass fraction, the ratio of the flotation collector is 70% of diesel oil, 12% of n-octanoic acid, 8% of n-valeraldehyde, and 10% of n-pentyl ether. The preparation process is as follows: diesel oil, n-octanoic acid, n-valeraldehyde and n-pentyl ether are mixed in proportion, and stirred at a speed of 1000 rpm for 15 minutes to obtain the flotation collector.

Embodiment 1-2

[0042] Example 1-2 is similar to Example 1-1, the only difference is that the collector ratio is: diesel oil 60%, n-octanoic acid 15%, n-valeraldehyde 10%, n-pentyl ether 15%.

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Abstract

The invention provides a low-order coal slurry flotation collecting agent compounded with acid aldehyde ether and a preparing method and application of the low-order coal slurry flotation collecting agent. The collecting agent comprises following components including, by mass percent, 60%-85% of C10-C16 hydrocarbon oil, 5%-15% of C6-C8 acid, 5%-15% of C5-C9 aldehyde and 5%-15% of C4-C10 ether. According to the provided low-order coal slurry flotation collecting agent compounded with the acid aldehyde ether, the collecting agent has the characteristics that components are simple, the collectingagent can serve as the low-order coal slurry flotation collecting agent to finish economical and efficient sorting of conventional flotation, reagent consumption is low, the flotation cost is low, and the sorting efficiency is high.

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 陶亚东郭爱军关丙火王进荣赵环宇杨珍娥
Owner CHINA SHENHUA ENERGY CO LTD
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