VOLATILIZATION BEHAVIOR OF TIN DURING CARBOTHERMIC REDUCTION OF TIN-BEARING MIDDLING TO RECOVER TIN

  • Jianfa Jing Central South University
  • Yufeng Guo Central South University
  • Feng Chen Central South University
  • Fuqiang Zheng Central South University
  • Lingzhi Yang Central South University
Keywords: reductions, selectivity, thermodynamics, volatiles, tin,

Abstract


A new method for selecting reducing agent was proposed in this study. This study dedicated to recovery of tin from tin-bearing middling by carbothermic reduction. Volatilization behavior of tin during carbothermic reduction was systematically studied, including the tin volatilization thermodynamics and kinetics, the selecting method of reducing agent, the effects of reducing agent, reduction temperature and time on the tin volatilization rate. The thermodynamic results showed that the SnO2 was reduced to SnO by controlling CO% in the range of 9%~15%, and then volatilized as SnO. The reduction efficiency and the react capability with CO2 of three reducing agent were investigated, which indicated tin volatilization is close to the nature of the reductant, and it was beneficial on the volatilization by using the coke powder. The experiment results show that the volatilization ratios of tin can reach more than 81.34% when the coke powder is used as the reducing agent at 900 °C for 2h. The kinetic of tin volatilization during the reduction roasting process showed that the reaction was controlled by the interface chemical reaction and the activation energy of the reaction was 44.66 kJ/mol.

Author Biographies

Jianfa Jing, Central South University

School of minerals Processing and Bioengineering, Central South University, Changsha 410083，China

Yufeng Guo, Central South University
School of minerals Processing and Bioengineering, Central South University, Changsha 410083，China
Feng Chen, Central South University
School of minerals Processing and Bioengineering, Central South University, Changsha 410083，China
Fuqiang Zheng, Central South University
School of minerals Processing and Bioengineering, Central South University, Changsha 410083，China
Lingzhi Yang, Central South University
School of minerals Processing and Bioengineering, Central South University, Changsha 410083，China
Published
2018/12/27
How to Cite
Jing, J., Guo, Y., Chen, F., Zheng, F., & Yang, L. (2018). VOLATILIZATION BEHAVIOR OF TIN DURING CARBOTHERMIC REDUCTION OF TIN-BEARING MIDDLING TO RECOVER TIN. Journal of Mining and Metallurgy, Section B: Metallurgy, 54(3), 419. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/17837
Issue
Vol. 54 No. 3 (2018)
Section
Original Scientific Paper

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