Effect of dispersants on coal slime classification in a novel classification apparatus

• Autorzy: Zhu Hongzheng , Lόpez-Valdivieso Alejandro , Zhu Jinbo , Min Fanfei

Identyfikatory

DOI

10.5277/ppmp18135

• Języki publikacji: EN

Abstrakty

EN

The effects of the dispersants NaOH and Na2CO3 on the classification of coal slimes was studied in a novel classification apparatus. A dispersion effect was characterized through slurry pH and transmittance measurements as well as zeta potential determinations of the slimes. The pH increased and the zeta potential became more negative, while the transmittance decreased with the increase in the NaOH and Na2CO3 addition. The miscellany rates in the overflow decreased by 15.18% and 11.22% with NaOH and Na2CO3, respectively, while that in the underflow was 31.81% and 27.08%, respectively. An ash-removal efficiency from the coal slurries increased by 20.03% and 10.50% with NaOH and Na2CO3, respectively. It was found that the largest difference in classification efficiency between these dispersants in the overflow was 26.05% and underflow was 14.86%. At the high classification efficiency, the transmittance of the slurry decreased, indicating that better dispersion effect led to the higher classification efficiency of the coal slurry. NaOH showed to be a better dispersant for coal slimes classification than Na2CO3 in the novel classification apparatus.

Słowa kluczowe

EN

classification; dispersant; coal slime; transmittance; miscellany rate

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2019
• Tom: Vol. 55, iss. 2
• Strony: 336--345
• Opis fizyczny: Bibliogr. 34 poz., rys., tab.

Twórcy

autor

Zhu Hongzheng

• School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, 232001, China
• Surface chemitry lab, Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Av. Sierra Leona 550, San Luis Potosi, SLP 78210, Mexico

autor

Lόpez-Valdivieso Alejandro

• Surface chemitry lab, Instituto de Metalurgia, Universidad Autonoma de San Luis Potosi, Av. Sierra Leona 550, San Luis Potosi, SLP 78210, Mexico

autor

Zhu Jinbo

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

autor

Min Fanfei

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

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).