Study on separation of fine-particle ilmenite and mechanism using flocculation flotation with sodium oleate and polyacrylamide
Yang Peng 1,   Junhui Xiao 1  
,   Bing Deng 2, 3,   Zhen Wang 1,   Nengyun Liu 3, 1,   Daoguang Yang 2, 3,   Wei Ding 1,   Tao Chen 1,   Qiang Wu 1
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Southwest University of Science and Technology, China
Pangang Group Panzhihua Iron & Steel Research Institute Co. Ltd., China
Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, China
Junhui Xiao   

School of Environment and Resource of Southwest University of Science and Technology
Publication date: 2019-11-24
Physicochem. Probl. Miner. Process. 2020;56(1):161–172
In this paper, sodium oleate, polyacrylamide, soluble starch and sodium carboxymethyl cellulose were used as flocculants to study the flocculation and sedimentation behavior of microfine ilmenite. Sedimentation test shows that sodium oleate and polyacrylamide have good flocculation effect on ultrafine ilmenite. The flocculation rate of ilmenite can be further improved by the combination of sodium oleate and polyacrylamide. It was found that both flocculants could generate chemical adsorption with ilmenite surface, and they all react with Fe3+ on ilmenite surface. However, sodium oleate reacts with Fe3+ to form a water-insoluble iron oleate precipitate which coats the surface of the ilmenite and hinders the action of polyacrylamide and the remaining Fe3+. This problem can be avoided by adding polyacrylamide followed by sodium oleate, and the flotation recovery can be increased significantly.