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A high-efficiency separation method for high-ash refractory coal slime

A difficult-to-separate, slime technology, used in flotation, solid separation, etc., to solve problems such as cover and low flotation efficiency

Active Publication Date: 2019-08-16
山西途悦选煤工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the wetting process of coal slime, clay particles are often easy to adhere to coal particles and cause capping, and the non-selective competitive adsorption of high-ash fine mud to flotation agents also leads to low flotation efficiency.

Method used

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  • A high-efficiency separation method for high-ash refractory coal slime

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] Example 1: Pump the pulp with a pulp concentration of 80g / L into a mixing tank with a heating device, heat the pulp to 80°C and keep it at a constant temperature for 3 hours, and continuously inject air at a rate of 0.15m3 / h during the process of maintaining the constant temperature of the pulp Accelerated oxidation; heat the conical barrel in advance and keep it at 200°C, blend diesel oil, nonylbenzene, dodecane and emulsifier in a ratio of 4:2:3:1, and slowly inject it into the conical barrel through a peristaltic pump The flotation agent is obtained, and the flotation agent is injected into the pulp preparer according to the dosage of 450g / t and the pulp. After the pulp is adjusted, the pulp is fed into the flotation column for separation, and finally the flotation clean coal and flotation tailings are obtained.

Embodiment 2

[0007] Example 2: Diesel oil, nonylbenzene, dodecane and emulsifier were weighed according to 5:2:2:1, and the remaining steps were as described in Example 1.

Embodiment 3

[0008] Example 3: Diesel oil, nonylbenzene, dodecane and emulsifier were weighed according to 5:2:1:2, and the remaining steps were as described in Example 1.

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Abstract

The invention discloses a high-ash hard-dressing coal slime separation method. In the method, a raw coal ore pulp pretreatment system, a flotation reagent mixing system and a flotation system are included. The ore pulp preparation process is completed in the ore pulp pretreatment system. The flotation reagent mixing system is used for producing a flotation agent suitable for coal slime. High-efficiency separation of high-ash hard-dressing coal slime is realized through the flotation system finally. The high-ash hard-dressing coal slime separation method has the beneficial effects that the raw coal pretreatment system completes surface oxidation of coal slime particles; the reagent mixing system realizes introduction of oxygen-containing functional groups; coal slime and the flotation agent adhere to each other through polar interaction, and then high-efficiency separation is realized.

Description

technical field [0001] The invention relates to a high-efficiency separation method for high-ash refractory coal slime, which belongs to the field of coal slime separation. Background technique [0002] With the continuous application of my country's mechanized coal mining technology and the continuous development of dense medium coal preparation technology, coal slime gradually presents the characteristics of "poor", "fine" and "miscellaneous". This part of coal slime contains a large amount of kaolin, illite and Clay minerals such as montmorillonite that are easy to muddy often cause excessive ash content and low yield in the actual flotation process, which brings serious challenges to the efficient separation of coal slime. [0003] At present, flotation is still one of the most commonly used means of recovering fine coal slime particles. During the flotation process, low-ash coal slime particles are more hydrophobic due to their strong hydrophobicity under the compensatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03D1/018B03D1/14
CPCB03D1/018B03D1/14
Inventor 鲍荣赵跃民
Owner 山西途悦选煤工程技术有限公司