Investigation of Effects of Physical Parameters on Flotation of Bigadic Colemanite Ore
In the flotation process the physical factors such as agitation intensity air flow rate and pulp solid concentration are very important parameters affecting grades and recoveries of the products. The flotation tests were performed on the samples of Bigadic colemanite ore to investigate these factors at different agitation intensities ranging from 1000 rpm to 1400 rpm and air flow rates from 1000 cm3·min-1 to 2000 cm3·min-1 with 2 L and 4 L cells using Denver laboratory flotation machine.The tested collectors were Cytec Aero 825, Aero 848N and their mixtures. Agitation intensity and air flow rises resulted in more floated material although sometimes being not selective. These effects can be attributed to powerful collisions between air bubbles and mineral particles.The first observation was the effect of pulp solid concentration on the floatability of minerals,while the flotation in 2 L cell (0.125 g·L-1 solid concentration) at 1000 rpm (0.176 wattcm-3), and with 1000 cm3 min-1 air flow rate was possible, the flotation in 4 L cell (0.0625 g·L-1 solid concentration at 1000 rpm. (0.176 wattcm-3) and with 1000 cm3·min-1 air flow rate was not possible. However at 4 L cell after increasing agitation intensity to 1200 rpm (0.201 wattcm-3) keeping 1000cm3 ·min-1 air flow rate, flotation was possible again. This shows that these factors such as agitation intensity have some critical role on flotation.Another interesting observation was on the selective effect of pulp solid concentration. In the flotation with 1 L cell at different agitation intensities, collector Aero 848N was selective against calcite, while in the flotation with 2 L cell at different agitation intensities the same collector Aero 848N was selective against colemanite.
Bigadic colemanite ore Flotation Agitation intensity Air flow rate Separation index
E. Yigit C. Gozkaman S. G. Ozkan M. F. Eskibalci
Yildiz Technical Uni., Faculty of Chemical&Metallurgical Eng., Metallurgical Eng. Dept., Esenler, Is Istanbul Uni., Eng.Faculty, Mining Eng. Dept., Avcilar, Istanbul, Turkey
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1285-1290
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）