Study on effect and mechanism of sodium hexametaphosphate on flotation effect of coal slime

Yiqing Zhai; Biyang Tuo; Dianfa Gu; Yun Tang

doi:10.1117/12.3015612

6 February 2024 Study on effect and mechanism of sodium hexametaphosphate on flotation effect of coal slime

Yiqing Zhai, Biyang Tuo, Dianfa Gu, Yun Tang

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129790W (2024) https://doi.org/10.1117/12.3015612
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

The effect of sodium hexametaphosphate on the flotation of low-rank coal slime and its mechanism is studied by unit flotation test of coal slime and EDLVO theory. After adding 800 g/t sodium hexametaphosphate, the flotation effect of sludge is the best, and the combustible substance recovery of cleaned coal can be increased by 8.01%. If the amount of sodium hexametaphosphate exceeds 800 g/t, the flotation efficiency of coal slime begins to decline. In Zeta potential test and contact angle test, the dosage of hexametaphosphate increased from zero to 800 g/t, and the Zeta potential of tailings obtained from the float-sink test will increase from 14.11 mV to 18.69 mV, and the contact angle decreases from 36.7° to 20.4°. The effect of sodium hexametaphosphate is obvious. The EDLVO theoretical calculation shows that the addition of sodium hexametaphosphate can increase the interaction between particles in coal slime and increase the mutual repulsion between particles, which makes the coal slime particles in the flotation system more dispersed and is conducive to improving the flotation effect. The feasibility of adding sodium hexametaphosphate in coal slime flotation test is verified theoretically.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Yiqing Zhai, Biyang Tuo, Dianfa Gu, and Yun Tang "Study on effect and mechanism of sodium hexametaphosphate on flotation effect of coal slime", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129790W (6 February 2024); https://doi.org/10.1117/12.3015612

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