Enhanced Flotation of Coal Slime with ST-diesel Microemulsion

TUO Biyang; DU Ruikang; GU Dianfa; WANG Jianli; NIE Guanghua; TANG Yun

doi:10.13779/j.cnki.issn1001-0076.2023.04.003

2023 Vol. 43, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(4): 24-32

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TUO Biyang, DU Ruikang, GU Dianfa, WANG Jianli, NIE Guanghua, TANG Yun. Enhanced Flotation of Coal Slime with ST-diesel Microemulsion[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 24-32. doi: 10.13779/j.cnki.issn1001-0076.2023.04.003

Citation:

TUO Biyang, DU Ruikang, GU Dianfa, WANG Jianli, NIE Guanghua, TANG Yun. Enhanced Flotation of Coal Slime with ST-diesel Microemulsion[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 24-32. doi: 10.13779/j.cnki.issn1001-0076.2023.04.003

Enhanced Flotation of Coal Slime with ST-diesel Microemulsion

1.
School of Mining, GuiZhou University, Guiyang 550025, China
2.
National & Local Joint Laboratory of Engineering for Effective Utilization of Regional Mineral Resources form Karst Areas, Guiyang 550025, China
3.
Panzhou Xiangyu Songshan Resources Recovery Co. LTD, Panzhou 553599, China
4.
College of Material and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412000, China

Received Date: 13 May 2023

Publish Date: 25 August 2023

Abstract

Abstract

As a collector for coal slime flotation, diesel oil has poor dispersion and collection effect and large dosage. In order to improve the dispersion and collection performance of diesel oil. Two surfactants, Span80 and Tween80, are used to emulsify diesel collector for coal slime flotation. A new collector ST-diesel microemulsion with droplet size less than 100 nm is being prepared. The improvement effect of slime flotation index is studied by unit flotation test. The mechanism of microemulsion on the surface of coal slime is discussed by means of contact angle test, Zeta potential analysis, infrared spectrum analysis and EDLVO theoretical calculation. When ST-diesel microemulsion is used as coal slime collector, the flotation effect is better, and the recovery rate of combustible body can reach 68.13% which is 9.23 percent higher than diesel collector. The contact angle of pure coal surface increased by 17.3° after ST-diesel microemulsion treatment compared with diesel. The absolute value of surface Zeta potential decreases. The energy barrier of the total energy V_T of the interaction between coal particles is reduced, which is beneficial to the agglomeration between particles. The physical adsorption of surfactant and oxygen-containing functional groups on the surface of coal slime improves the surface hydrophobicity of coal particles. The ST-diesel microemulsion can be used as a new and efficient collector for coal slime flotation.
- coal slime /
- flotation /
- diesel oil /
- surfactant /
- microemulsion

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References

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