Flotation Performance of a New Chelating Collector
Phenyl malonic acid (PMA), a new chelating collector, which contains a phenyl structure and a malonic acid chelating group, has been synthesized and its collecting capabilities to calamine,hematite, quartz and hemimorphite are also studied in laboratory.From the experimental results, it can be seen that the PMA has somewhat flotation ability to calamine, hematite and quartz, while it nearly has no collecting ability to hemimorphite. With the increase of PMA concentration, the flotation recovery of calamine increases. When the dosage of PMA was 560g/t and at pH=7～9, the flotation recovery of calamine gets its maximum of 45.94%.The test results about the influence of pH on the flotation recovery of quartz show that the flotation recovery increases with the increase of pH, and the maximal flotation recovery can be gained in alkaline media. On the other hand, PMA has stronger flotation capability to hematite than to other minerals. The flotation recovery of minerals increases with increase of PMA concentration. When the dosage of PMA is 560g/t and at pH=5～7, the flotation recovery of hematite is 82.96%. Meanwhile, the influence of pH on the flotation recovery of hematite was studied and test results showed that, as pH increases, the flotation recovery sharply rises until pH=4, then the increasing rate decreases outstandingly, at pH=6 the flotation recovery reaches its maximum of 82.96% and it decreases speedily in alkaline media.Finally, through the measurement of infrared spectroscopy and in terms of solution chemistry of collector, the flotation mechanism has been discussed. It was concluded that the adsorption of PMA on minerals surface is chemical adsorption in nature through two oxygen atoms in the polar group of phenyl malonic acid chelating with the metal ions of minerals surface to form a hexagon-cycle chelate complex: C(=O)-O-M-O-(O=)C.
Floatation Chelating collector
W. G. Liu D. Z. Wei Y. G. Sun C. Y. Jia
School of Resources and Civil Engineering, Minerals Processing, Northeastern University, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3075-3080
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）