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A low-rank coal slime flotation collector and its application

A coal slime flotation and collector technology, which is applied in flotation, solid separation and other directions, can solve problems such as difficulty in popularization and application, potential safety hazards, poor operability, etc. Effect

Active Publication Date: 2019-09-20
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the existence of chemical heating link in this method, there are certain safety hazards, making it difficult to popularize and apply
Therefore, in view of the high chemical consumption, high cost and poor operability of unconventional flotation methods for low-rank coal slime flotation, it is not only beneficial to develop special high-efficiency reagents suitable for conventional flotation based on the characteristics of low-rank coal slime It is of great significance to reduce the pollution caused by coal combustion and improve the economic efficiency of coal enterprises to realize the upgrading of thermal coal slime flotation and the efficient and clean utilization of coal resources in my country

Method used

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  • A low-rank coal slime flotation collector and its application
  • A low-rank coal slime flotation collector and its application
  • A low-rank coal slime flotation collector and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Coal slime properties: The coal sample is from Shuozhou long-flame coal, and the coal slime has a high inner ash content, and the ash content of the incoming material 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.

[0033]Operating conditions: During flotation, first add a certain amount of pre-configured flotation collector (configured according to the optimal ratio) to the flotation pulp, and then add a certain amount of foaming agent 2-octanol, the pulp after adding the agent Flotation separation (pulp concentration: 80g / L) is carried out after stirring and pulping to obtain flotation clean coal and flotation tailings. Table 1 shows the flotation comparison results of the medicament of the present invention and common collector diesel oil. The proportion of the flotation collector is 70% of diesel oil, n-octanoic acid (8%), butyl benzoate (6%), diisobutyl keto...

Embodiment 2

[0037] Example 2: Coal slime properties: The coal sample is from Fugu weakly caking coal, and the ash content of the raw coal is 45%. -0.074mm particle size coal slime accounts for 65% of the coal sample.

[0038] Operating conditions: During flotation, first add a certain amount of pre-configured flotation collector to the flotation pulp, and then add a certain amount of foaming agent 2-octanol. After adding the agent, the pulp is stirred and adjusted for 2 minutes. A flotation separation can get the corresponding flotation effect. The flotation comparison results of the agent of the present invention and common collector diesel oil are shown in Table 2. The proportion of the flotation collector is 60% of diesel oil, n-octanoic acid (12%), butyl benzoate (8%), diisobutyl ketone (8%), and n-valeraldehyde (12%).

[0039] Table 2 Comparison of diesel oil flotation index between collector of the present invention and common collector (Fugu weak sticky coal)

[0040]

[0041...

Embodiment 3

[0042] Example 3: Coal slime properties: It is derived from Shendong Changyan coal, the ash content of coal slime is 13%, and the particle size of -0.074mm accounts for 70%.

[0043] Operating conditions: During flotation, first add a certain amount of pre-configured flotation collector to the flotation pulp, and then add a certain amount of foaming agent 2-octanol. After adding the agent, the pulp is stirred and adjusted for 2 minutes. A flotation separation can get the corresponding flotation effect. The flotation comparison results of the agent of the present invention and common collector diesel oil are shown in Table 3. The proportioning of the flotation collector is 68% of diesel oil, n-octanoic acid (8%), butyl benzoate (4%), diisobutyl ketone (12%), and n-valeraldehyde (8%).

[0044] Table 3 collector of the present invention and common collector diesel oil flotation index comparison (Shendong Changyan Coal)

[0045]

[0046] As can be seen from Table 3, when the ...

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Abstract

The invention discloses a low-rank coal slime flotation collecting agent and an application thereof, and belongs to the field of the slime flotation collecting agent and the application thereof. The collecting agent is formed by compounding hydrocarbon oil and a plurality of accelerants according to a certain mass ratio, wherein the mass ratio of the hydrocarbon oil (C10-C18) is 60-75%, the mass ratio of C6-C8 acid is 8-15%, the mass ratio of C10-C18 ester is 4-8%, the mass ratio of C5-C7 ketone is 6-12% and the mass ratio of C5-C9 aldehyde is 7-13%. The slime flotation collecting agent can be obtained by stirring the chemicals for 30 minutes and uniformly mixing the chemicals according to the corresponding ratio. During the flotation, a certain amount of the collecting agent and a certain amount of a foaming agent prepared in advance are added into flotation slurry with certain concentration, and the flotation separation is carried out after the agents are added and the flotation slurry is stirred and mixed, wherein the usage amount of the collecting agent is 0.6-3.0kg / t, the usage amount of the foaming agent is 0.1-0.5kg / t, and the usage amount of the agents is metered by per ton of dry coal slime consumption. The flotation collecting agent is used for the low-rank coal slime flotation and has the advantages of being low in agent consumption, low in flotation cost, high in separation efficiency and remarkable in economic benefit.

Description

technical field [0001] The invention relates to a coal slime flotation collector and its application, in particular to a low-rank coal slime flotation collector and its 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 flotation costs, m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/008B03D101/02B03D103/08
Inventor 王永田张义田全志孙浩边岳魏锦扬
Owner CHINA UNIV OF MINING & TECH
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