Response Surface Methodology for Optimization of the Chloridizing Roasting Process for a High Copper Pyrite Cinder

Abstract:

This study aimed to obtain volatile copper from a high-copper pyrite cinder by optimizing the chloridizing roasting process using response surface methodology (RSM). The effect of key parameters, i.e., dosage of CaCl₂ addition, roasting time and roasting temperature, on the copper volatile ratio was investigated and a quadratic model was suggested by the methodology to correlate the variables to this volatile ratio. The results indicated that the model was in good agreement with the experimental data at a correlation coefficient (R²) of 0.9782, and the most influential parameter on efficiency was identified as the dosage of CaCl₂ addition. The optimum conditions for chloridizing roasting from the high copper pyrite cinder were identified as a dosage of CaCl₂ addition of 4.8 wt%, a roasting time of 19.28 min and a roasting temperature of 1151.51 °C; under such conditions, a copper volatile ratio of 97.82% was achieved. The pellets obtained by this process are characterized by a high content of hematite, and the main impurity element contents are consistent with the requirements for iron concentrate, which is suitable for use in ironmaking.

• Periodical: Advanced Materials Research (Volumes 524-527)
• Pages: 1070-1077
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.524-527.1070
• Online since: May 2012
• Authors: Shao Jun Bai, Shu Ming Wen, Yu Chen, Hai Ying Shen, Dan Liu, Jiu Shuai Deng
• Keywords: Chloridizing Roasting, Copper Volatile Ratio, Pyrite Cinder, Response Surface Methodology (RSM)

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