Acta Metallurgica Sinica (English Letters) ›› 2009, Vol. 22 ›› Issue (4): 291-296.DOI: 10.1016/S1006-7191(08)60101-5

• Research paper • Previous Articles     Next Articles

Study on experiment and mechanism of thermal dissolved sulfuration of low grade lead-zinc oxide ore in lanpin

Minghua JIANG1,2,Bin YANG1, Jijun WU1, Yuchun ZHAI3,Yang ZHOU1   

  1. 1) Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,Kunming 650093, China
    2) Yunnan Jinding Zinc Limited Company, Lanpin 671401,China
    3) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2008-09-04 Revised:2008-12-29 Online:2009-08-25 Published:2009-10-10

Abstract:

The thermal dissolved sulfuration technology is brought forward and performed based on the characteristic of low grade lead-zinc oxide ore in lanpin. Using sulfur as the sulphidizing agent in the experiment, the oxides in the sandstone and ignimbrite are changed into sulfides. The disproportionation reaction of sulfur in a solution is confirmed as 4S+3H2O=2S2-+S2O32-+6H+. The dynamics process is studied and the first-order reaction rate equation -1n(1-α)=ktt is obtained. The effects of the reactive products, stirring speed, dosage of sulfuration agent, value of pH and sulphidizing temperature on the sulfuration of oxide ore are investigated. The results indicate that the reactive apparent activation energy is 100.8 kJ/mol and the sulfuration ratio of lead-zinc oxide ore reaches 60 % under the conditions of pH 5.9-7.5, the sulfuration temperature of 130 ℃, sulfuration time of 180~min and the stirring speed of 800 r/min.

Key words: Lead-zinc oxides ore, Thermal dissolved sulfuration, Sulphidizing ratio, Disproportionation reaction, First-order reaction