Eliminating the adverse effect of the lime on the gold-bearing pyrrhotite flotation using the isopentyl xanthate as collector at low alkalinity
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1
School of Resource Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
2
College of Foreign Languages, Baoji University of Arts and Sciences, Baoji 721000, China
3
Faculty of Gem Stone, Shannxi Institute of International Trade & Commerce, Xi’an 712046, China;
CORRESPONDING AUTHOR
Qian Wang   

School of Resource Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
Publication date: 2019-08-05
 
Physicochem. Probl. Miner. Process. 2019;55(5):1250–1258
 
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ABSTRACT
Flotation optimal conditions and mechanism of regulator lime, isopentyl xanthate and butyl xanthate on pyrrhotite were investigated by flotation test, contact angle, zeta potential and infrared spectroscopic analysis. It is found that there is a certain relationship between the regulator lime and the collector isopentyl xanthate. The results of flotation indicate that lime can indeed inhibit pyrrhotite, and isopentyl xanthate can decrease the depression effect of lime on pyrrhotite in low alkalinity. The results of adsorption mechanism of lime and isopentyl xanthate show that after lime adsorbed on the pyrrhotite surface, Ca2+ inhibit the adsorption of collector with the form of Ca(OH)2 precipitates. Compared with butyl xanthate, isopentyl xanthate could reduce the generation of hydrophilic Ca(OH)2 and generate less hydrophilic CaCO3 as well to decrease the negative effect of gold-bearing pyrrhotite flotation depressed by lime.
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ISSN:1643-1049