Entrainment of Quartz in Flotation Tests with Frothers
During passing gas bubbles through mineral suspensions, some mechanical carryover of fine particles to the froth layer always takes place. The entrainment of mineral particles is influenced by many parameters, mostly by the particle size and the concentration of the frother. The paper deals with influence of selected frothers (methylisobutylcarbinol (MIBC), α-terpineol, and hexadecane tricosaethyleneglycol ether (C16E23)), common laboratory flotation frothers, on the mechanical carryover of quartz, a typical gangue mineral component of ores. Entrainment tests were carried out in a laboratory Mechanobr flotation machine with quartz particles suspended in aqueous frother solutions. The mechanical recovery of quartz in the presence frother was increasing with time and reached plateau after about 20 minutes of flotation. The plateau level of quartz recovery depended on the frother concentration. Initially an increase of the plateau with frother concentration was observed until the plateau reached the highest level called the maximum recovery εmax.The εmax can be used as a parameter to characterize the ability of frothers to entrainment. In the studied quartz-frother flotation system the maximum entrainment was 32%, 50% and 80% for methylisobutylcarbinol (MIBC), α-terpineol, and monohexadecane tricosaethylene glycol ether (C16E23), respectively. A comparison of the maximum entrainment factor εmax with other, known from literature, indices such as bubble critical coalescence concentration (CCC), dynamic foamability index (DFI),Jwιε=25% revealed, except DFI, their similarity.
Quartz Flotation Frothers
D. Szyszka J. Drzymala P. Resiak E. Mielczarski J. Mielczarski
Wroclaw University of Technology, Department of Geoengineering, Mining and Geology, Poland Laboratoire Environnement et Mineralurgie, France
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1068-1073
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）