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A low-rank coal slime flotation collector compounded with ester ether and its preparation method

A coal slime flotation and compound ester technology, which is applied in flotation, solid separation, etc., can solve the problems of increasing toxic and harmful components, easily endangering the ecological environment, and complex wastewater components, so as to improve flotation efficiency and economic efficiency Effect of sorting and simplification of flotation process

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 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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  • A low-rank coal slime flotation collector compounded with ester ether and its preparation method
  • A low-rank coal slime flotation collector compounded with ester ether and its preparation method
  • A low-rank coal slime flotation collector compounded with ester ether and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 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.

[0042] 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

[0044] 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 butyl benzoate, and 10% of n-amyl ether. The preparation process is as follows: after mixing diesel oil, n-octanoic acid, butyl benzoate and n-pentyl ether in proportion, stirring at a speed of 1000 rpm for 15 minutes to obtain the flotation collector.

Embodiment 1-2

[0046] Embodiment 1-2 is similar to Embodiment 1-1, the only difference is that the collector ratio is: 60% of diesel oil, 15% of n-octanoic acid, 10% of butyl benzoate, and 15% of n-amyl ether.

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Abstract

The invention provides a low-rank coal slime flotation collector compounded with ester ether and a preparation method thereof. In terms of mass percentage, the collector includes: C 10 -C 16 Hydrocarbon oil 60-85%, preferably 70-80%, more preferably 75-80%; C 6 -C 8 Acid 5‑15%, preferably 7‑12%; C 10 -C 18 Ester 5‑15%, preferably 5‑8%; ether 5‑15%, preferably 8‑10%, said ether is C 4 -C 10 or n-octyl ether. The collector provided by the invention has simple components, can carry out flotation of low-rank coal slime by conventional methods, has low reagent consumption, low flotation cost, high sorting efficiency and remarkable economic benefits.

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 宋文革陶亚东朱子琪钟世刚周瑞通丛日红
Owner CHINA SHENHUA ENERGY CO LTD
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