Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 2    No. 2    May 1992

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THE SiOi H20 INTERFACE AND EFFECTS ON QUARTZ ACTIVATION IN FLOTATION SYSTEM
Sun Zhongxi1, Willis Forsling1, Chen Jin2

1.Lulea University of Technology, S-951 87 Lulea, Sweden;
2.Central South University of Technology, Changsha 410083, China

Abstract:The correlation between surface complexation at the SiO2-H2O interface and quartz flotation behavior was studied. Computer assisted calculations, using the programs SOLGASWATER, were adapted in order to construct distribution diagrams of surface speciation in the SiO2-metal ion-H+ system in aqueous solutions. Equilibrium constants far both surface and solution reactions were introduced in the composition matrix. Surface complexation, surface charge as well as flotation results were compared and a good agreement was obtained.Furthermore, flotation mechanisms of quartz activation by common metal ions like Ca2+,Mg2+,Fe3+  are quantitatively discussed based on the surface reaction equilibrium constants.

 

Key words: surface complexation  SiO2-H2O interface  quartz flotation

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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