The Effects of Pretreatment on the Flotation Kinetics of Waste Coal

Sokolović, Jovica; Stanojlovic, Rodoljub; Marković, Zoran

doi:10.1080/19392699.2012.663023

Cited by 43 publications

(9 citation statements)

References 24 publications

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“…Batch flotation test data in the literature support the first-order rate equation under reasonable operating conditions (Tomlinson & Fleming, 1963;Imaizumi & Inoue, 1965;Harris & Chakravarti, 1970;Jameson et al, 1977;Dowling et al, 1985;Xu, 1998;Agar et al, 1998;Oliveira et al, 2001;Cilek, 2004;Sokolovic et al, 2012). Many models of flotation kinetics were developed, from the deterministic and adsorption models to statistical and stochastic ones, out of which each dealt with another aspect (Brozek et al, 2003;Brozek & Mlynarczykowska, 2006;Kalinowski & Kaula, 1995;.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Optimal Model of the Flotation Kinetics of Copper Slag from Copper Mine BOR

Stanojlovic

Sokolović

2014

Archives of Mining Sciences

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In this study the effect of mixtures of copper slag and flotation tailings from copper mine Bor, Serbia on the flotation results of copper recovery and flotation kinetics parameters in a batch flotation cell has been investigated.By simultaneous adding old flotation tailings in the ball mill at the rate of 9%, it is possible to increase copper recovery for about 20%. These results are compared with obtained copper recovery of pure copper slag.The results of batch flotation test were fitted by MatLab software for modeling the first-order flotation kinetics in order to determine kinetics parameters and define an optimal model of the flotation kinetics. Six kinetic models are tested on the batch flotation copper recovery against flotation time. All models showed good correlation, however the modified Kelsall model provided the best fit.Keywords: copper slag, flotation tailings, flotation kinetics, first-order, model, MatLab W pracy badano wpływ mieszanin żużla miedziowego i odpadów poflotacyjnych w kopalni miedzi Bor na efektywność odzysku miedzi na drodze flotacji oraz parametry kinetyki flotacji w urządzeniu do flotacji pracującego w trybie cyklicznym.Poprzez równoczesne wprowadzenie starych odpadów poflotacyjnych rozdrobnionych w młynie kulowym w ilości 9%, możliwe jest podniesienie poziomu odzysku miedzi o około 20%. Wyniki te porównać można z poziomem odzysku miedzi z czystego żużla.Wyniki badań flotacji porcji wsadu zostały dopasowane przy użyciu oprogramowania MatLab do modelowania kinetyki flotacji (model pierwszego rzędu) w celu określenia parametrów kinetycznych i dla zdefiniowania optymalnego modelu kinetyki procesu flotacji. Przebadano sześć modeli kinetyki, analizując wielkość odzysku miedzi ze wsadu w stosunku do czasu flotacji. Wszystkie modele wykazywały dużą korelację, a najlepsze dopasowanie wykazywał zmodyfikowany model Kelsalla.Słowa kluczowe: żużel miedziowy, odpady poflotacyjne, kinetyka flotacji, model pierwszego rzędu, MatLab

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Section: Introductionmentioning

confidence: 99%

A Study of the Optimal Model of the Flotation Kinetics of Copper Slag from Copper Mine BOR

Stanojlovic

Sokolović

2014

Archives of Mining Sciences

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“…In contrast, the benzene ring, C-C, CH 3 , and CH 2 are the primary hydrophobic groups in the coal. The oxygen containing functional groups made Taixi oxidized coal difficult to float using common oily collectors (Xia et al, 2013a(Xia et al, , 2013bSokolovic et al, 2012aSokolovic et al, , 2012bXia and Yang, 2013). However, in this investigation, the intensity of oxygen containing functional groups is low while the intensities of ash minerals and hydrophobic groups are very high.…”

Section: Ftir Analysismentioning

confidence: 45%

The Deashing of High-ash Coking Coal Fines by Flotation

Zhang

Xia

2015

Energy Sources, Part A: Recovery, Utilization, and Environmenta

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Coking coal is usually used to produce coke and then coke is applied in the minerals metallurgy. Worldwide, coking coal is relatively exiguous compared with other rank coals, i.e., lignite and anthracite. The high-ash coking coal fines have about 64% ash content in this article. Without the upgrading process, the high-ash coking coal fines can only be used as fuels. It is a waste of the coking coal resource. In this investigation, an attempt was made to float some clean coals from high-ash coking coal fines. Fourier transform infrared was used to indicate the chemical properties of high-ash coking coal fines. Fourier transform infrared results show that the primary mineral is kaolin in the high-ash coking coal fines. Contact angle measurement was also used to indicate the contact angles of coking coal fines at different gravity ranges and it shows that the contact angle decreases with the increase of gravity range. In this article, some clean coals with ash content of 13.48% could be obtained from highash coking coal fines based on natural hydrophobicity and low impeller speed.

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“…The flotation rate constant also first increases and then decreases as the size fraction decreases in all of the models except Model 3. Similar findings have been reported in investigations of the kinetics of waste coal flotation and reverse flotation of lignite (Sokolovic, Stanojlovic, and Markovic, 2012;Zhang et al, 2013). Xu (1998) The modified rate constants were used to define a new quantity, viz., the selectivity index (SI) or the relative modified rate constant of combustible matter (K C ) over that of ash (K A ).…”

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confidence: 50%