Investigating the effect of lip froth washing on coal yield during flotation of a high ash South African coal

• Autorzy: du Plessis Cherryl , Sibanda Vusumuzi , Dworzanowski Marek , Danha Gwiranai , Mamvura Tirivaviri A.

Identyfikatory

DOI

10.37190/ppmp/143171

• Języki publikacji: EN

Abstrakty

EN

An investigation was conducted to evaluate the effect of lip washing on coal flotation at Anglo American’s Goedehoop South (GHS) fine coal plant in South Africa. In the test-work, performance of cells with lip washing system were compared with baseline cells without lip washing in terms of coal yield and coal quality. Yields observed with lip washing were significantly higher than those of baseline cells. Improvements of up to 15% were recorded. The product obtained at low flotation reagent dosages (1.30–1.45 kg/t) on lip wash cells had ~16.85% ash content against ~17.65% with baseline cells, suggesting that higher yields could be achieved at superior qualities to those achieved with baseline cells. At higher reagent dosages (1.60–1.75 kg/t), coal yields further improved but quality reduced on lip wash cells. Calorific Values (CV) of coal products obtained by lip washing and baseline flotation were similar. When different coal particle size fractions were floated separately, the yield increased as particle size increased from 75 to 300 μm and then decreased from 300 to 500 μm for both baseline and lip washing flotation. Lip washing caused a marked increase in the yield for finer particles (< 300 μm) with optimum size class of between 212 – 300 μm. In addition, a much bigger increase in the yield was achievable with lip washing of lower quality coal. The ash content after lip washing of poor-quality coal were also comparable to the ash content after lip washing of good quality coal.

Słowa kluczowe

EN

flotation; mechanical flotation cell; flotation reagents; lip froth washing; coal yield; primary wash cells; secondary wash cells

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2021
• Tom: Vol. 57, iss. 6
• Strony: 169--181
• Opis fizyczny: Bibliogr. 27 poz., rys. kolor.

Twórcy

autor

du Plessis Cherryl

• School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa
• Anglo American, P.O. Box 62179, Marshalltown, South Africa, 2107

autor

Sibanda Vusumuzi

• School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa

autor

Dworzanowski Marek

• School of Chemical and Metallurgical Engineering, University of the Witwatersrand, Johannesburg, Private Bag 3, Wits 2050, South Africa

autor

Danha Gwiranai

• Department of Chemical, Materials and Metallurgical Engineering, Faculty of Engineering and Technology, International University of Science and Technology, Plot 10071, Boseja Ward, Private Bag 16 Palapye, Botswana

autor

Mamvura Tirivaviri A.

• Department of Chemical, Materials and Metallurgical Engineering, Faculty of Engineering and Technology, International University of Science and Technology, Plot 10071, Boseja Ward, Private Bag 16 Palapye, Botswana

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