Action Mechanism of Alkylhy Hydroxamic Acid on Main Minerals in Bauxite Ore
The conventional collector for bauxite mineral is oleic acid, which is highly insoluble and must be used in high dosage in bauxite flotation operations, that is the great drawback of oleic acid in use.A series of hydroxamic acid were synthesized, and their collecting ability to certain minerals in bauxite: diaspore, kaolinite were studied. The collecting power of various reagents to diaspore in an incremental sequence were shown as follows: benzyl hydroxamic acid＜amylic hydroxamic acid＜heptylic hydroxamic acid＜oleic acid＜octylic hydroxamic acid; while the incremental sequence of the collecting power to kaolinite was like this: benzyl hydroxamic acid＜amylic hydroxamic acid＜heptylic hydroxamic acid＜octylic hydroxamic acid＜oleic acid. It could be seen that octylic hydroxamic acid had the capability of high collectivity and good selectivity, and octylic hydroxamic acid was chosen to use in the following experiments. Reduced zeta potential showed the adsorption of the anionic collector on the mineral. By the adsorptive capability and IR tests, the adsorption of octylic hydroxamic acid on diaspore was determined to be chemical absorption, which was greater than that of oleic acid, as it was physical absorption. Results of floatation experiments on manually mixed minerals indicated that the collectivity and selectivity of octylic hydroxamic acid were better than oleic acid.
Bauxite Diaspore Flotation Hydroxamic acid Oleic acid
S. J. Liu W. Q. Qin Y. H. Hu J. Wang M. F. He Y. P. Chen
School of Mineral Processing and Bioengineering, Central South University, Changsha, 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
1436-1440
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）