Effect of two-stage energy input on enhancing the flotation process of high-ash coal slime

• Autorzy: Wang Xing , Han Youli , Zhu Jinbo , Liu Lingyun , Wang Hongyang , Lin Zhiyong , Xia Shuwei , Wang Po

Identyfikatory

DOI

10.37190/ppmp/189958

• Języki publikacji: EN

Abstrakty

EN

To solve the mismatch problems of nonlinear changes of coal slurry properties and energy input during the continuous flotation process, a two-stage energy input method was used to promote the efficient recovery of clean coal and achieve maximized benefits. Results showed that the flotation rate constant increased with the increase in stirring speed and reached its maximum value of 0.0271 s-1 when the stirring speed increased to 1200 r/min under a single energy input, with a maximum combustible recovery of 74.35%. However, the short-term flotation results within 40 s showed that the combustible recovery increased with stirring speed and reached its maximum value of 50.19% at 1500 r/min. The stirring speed was set at 1800 r/min for a fast flotation period and 2400 r/min for an enhanced separation period, which could achieve a maximum combustible recovery of 89.21%. Furthermore, the adsorption density of the collector was optimized, exceeding that achieved under single-stage energy input. The flotation process could be optimized by two-stage energy input. Coarse coal particles were preferentially floated by low-speed stirring in the initial fast selection period. Fine coal particles were further separated during the enhanced separation period under the action of highspeed shear. Two-stage energy input could significantly improve the combustible recovery of the overall flotation of coal slime.

Słowa kluczowe

EN

flotation; high-ash coal slime; single stage energy input; two-stage energy input; combustible recovery

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 3
• Strony: art. no. 189958
• Opis fizyczny: Bibliogr. 33 poz., rys., tab., wykr.

Twórcy

autor

Wang Xing

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
• Anhui Engineering Research Center for Coal Clean Processing and Carbon Emission Reduction, Huainan 232001, China

autor

Han Youli

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
• Anhui Engineering Research Center for Coal Clean Processing and Carbon Emission Reduction, Huainan 232001, China

autor

Zhu Jinbo

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
• Anhui Engineering Research Center for Coal Clean Processing and Carbon Emission Reduction, Huainan 232001, China

autor

Liu Lingyun

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
• Anhui Engineering Research Center for Coal Clean Processing and Carbon Emission Reduction, Huainan 232001, China

autor

Wang Hongyang

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China
• State Key Laboratory of Mineral Processing, Beijing 100260, China

autor

Lin Zhiyong

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

autor

Xia Shuwei

• School of Material Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China

autor

Wang Po

• Linhuan Coal Preparation Plant, Huaibei Mining Group, Huaibei, Anhui 235000, China

Bibliografia

• ABBAKER, A. M. A., ASLAN, N., 2023, The effect of microbubbles on coarse particle anionic flotation: analysis and optimization. Physicochemical Problems of Mineral Processing, 59(6), 172298.
• BARRAZA, J., GUERRERO, J., PIñERES, J., 2013, Flotation of a refuse tailing fine coal slurry. Fuel Process. Technol., 106, 498-500.
• GUI, X., CAO, Y., XING, Y., YANG, Z., WANG, D., LI, C., 2017, A two-stage process for fine coal flotation intensification. Powder Technol., 313, 361-368.
• GUO, H., HUANG, L., LIU, X., WANG, L., XIA, Y., CAO, Y., GUI, X., XING, Y., 2022, Effect of different mass proportions of fine slime on the flotation performance of coal. International Journal of Coal Preparation and Utilization, 43(11), 1863-1884.
• HAN, Y., WANG, X., ZHU, J., WANG, P., 2022, Gas Dispersion Characteristics in a Novel Jet-Stirring Coupling Flotation Device. ACS Omega, 7(10), 9061-9070.
• HASSANZADEH, A., SAFARI, M., HOANG, D. H., KHOSHDAST, H., ALBIJANIC, B., KOWALCZUK, P. B., 2022, Technological assessments on recent developments in fine and coarse particle flotation systems. Miner. Eng., 180, 107509.
• HAZARE, G., PRADHAN, S. S., DASH, N., DWARI, R. K., 2023, Studies on low-grade coking coal characterisation, flotation response and process optimisation. International Journal of Coal Preparation and Utilization, 43(12), 2165-2187.
• JUNG, M. U., KIM, Y. C., BOURNIVAL, G., ATA, S., 2023, Industrial application of microbubble generation methods for recovering fine particles through froth flotation: A review of the state-of-the-art and perspectives. Adv. Colloid Interface Sci., 322, 103047.
• KADAGALA, M. R., NIKKAM, S., TRIPATHY, S. K., 2021, A review on flotation of coal using mixed reagent systems. Miner. Eng., 173, 107217.
• KOH, P. T. L., SMITH, L. K., 2011, The effect of stirring speed and induction time on flotation. Miner. Eng., 24(5), 442-448.
• LASKOWSKI, J. S., LIU, Q., O'CONNOR, C. T., 2007, Current understanding of the mechanism of polysaccharide adsorption at the mineral/aqueous solution interface. Int. J. Miner. Process., 84(1-4), 59-68.
• LI, Z., CHANG, J., YANG, C., QU, J., YU, Y., XIONG, S., 2021, Experiments and CFD simulation of accessories used in stirred pulp-mixing process. Chemical Engineering and Processing - Process Intensification, 166, 108463.
• LI, Z., ZHAO, C., ZHANG, H., LIU, J., YANG, C., XIONG, S., 2019, Process intensification of stirred pulp-mixing in flotation. Chemical Engineering and Processing-Process Intensification, 138, 55-64.
• LIU, J., ZHANG, R., BAO, X., HAO, Y., GUI, X., XING, Y., 2023, New insight into the role of the emulsified diesel droplet size in low rank coal flotation. Fuel, 338, 127388.
• NORORI-MCCORMAC, A., 2017, The effect of particle size distribution on froth stability in flotation. Sep. Purif. Technol., 184, 240-247.
• OATS, W. J., OZDEMIR, O., NGUYEN, A. V., 2010, Effect of mechanical and chemical clay removals by hydrocyclone and dispersants on coal flotation. Miner. Eng., 23(5), 413-419.
• PAN, G., ZHU, H., SHI, Q., ZHANG, Y., ZHU, J., OU, Z., GAO, L., 2023, Effect of bubble trailing vortex on coal slime motion in flotation. Fuel, 334, 126802.
• SUN, L., CAO, Y., WANG, L., ZHENG, K., YAN, X., 2021, Vortex-generator-induced intensification of fine mineral collection in pipe flow. Miner. Eng., 171, 107116.
• WAN, H., AN, Y., QU, J., ZHANG, c., XUE, J., WANG, S., BU, X. z., 2023, Research on optimization method of flotation kinetic model based on molybdenite particle size effect. Physicochemical Problems of Mineral Processing, 59(2), 163004.
• WANG, H., LIANG, Y., LI, D., CHEN, R., YAN, X., ZHANG, H., 2022, Collisional interaction process between a bubble and particles with different hydrophobicity. Sep. Purif. Technol., 301, 121940.
• WEN, P., MA, X., FAN, Y., DONG, X., CHEN, R., CHANG, M., BAI, X., CAI, S., 2023, Insights into the interaction of polycarboxylate with coal and kaolinite and their application in flotation. Fuel, 340, 127481.
• XIA, Y., XING, Y., GUI, X., 2020a, Oily collector pre-dispersion for enhanced surface adsorption during fine low-rank coal flotation. Journal of Industrial and Engineering Chemistry, 82, 303-308.
• XIA, Y., ZHANG, R., CAO, Y., XING, Y., GUI, X., 2020b, Role of molecular simulation in understanding the mechanism of low-rank coal flotation: A review. Fuel, 262, 116535.
• XUE, Z., YANG, C., DONG, L., BAO, W., WANG, J., FAN, P., 2023, Recent advances and conceptualizations in process intensification of coal gasification fine slag flotation. Sep. Purif. Technol., 304, 122394.
• YANG, L., LI, D., ZHANG, L., YAN, X., RAN, J., WANG, Y., ZHANG, H., 2020a, On the utilization of waste fried oil as flotation collector to remove carbon from coal fly ash. Waste Manag, 113, 62-69.
• YANG, L., ZHU, Z., QI, X., YAN, X., ZHANG, H., 2018, The Process of the Intensification of Coal Fly Ash Flotation Using a Stirred Tank. Minerals, 8(12), 597.
• YANG, Z., LIU, M., CHANG, G., XIA, Y., LI, M., XING, Y., GUI, X., 2020b, Understanding the difficult selective separation characteristics of high-ash fine coal. Physicochemical Problems of Mineral Processing, 56(5), 874-883.
• YAO, N., LIU, J., SUN, X., LIU, Y., CHEN, S., WANG, G., 2021, A Rational Interpretation of the Role of Turbulence in Particle-Bubble Interactions. Minerals, 11(9), 1006.
• YU, Y., MA, L., CAO, M., LIU, Q., 2017, Slime coatings in froth flotation: A review. Miner. Eng., 114, 26-36.
• YUE, Z., REN, R., 2022, Study on the influence mechanism of the grinding fineness on the floatability of coking middings. Particulate Science and Technology, 41(1), 112-119.
• ZHAO, G., FENG, B., QIU, T., ZHU, D., LI, X., GAO, Z., YAN, H., WU, H., 2022, Enhanced flotation separation pyrrhotite from serpentine by fluid force field. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 651, 129711.
• ZHOU, R., WANG, H., LI, X., LI, D., WANG, W., LIANG, Y., YAN, X., ZHANG, H., 2023, Effect of energy input on flotation of particles with different sizes: Perspective of hydrodynamics characteristics. Journal of Environmental Chemical Engineering, 11(6), 111272.
• ZHUO, Q., LIU, W., WANG, P., DENG, J., XI, P., HUA, Y., 2023, Influence of flotation reagents on separation mechanism of macerals: A multi-scale study. Fuel, 333, 126480.