Pyrite cinder is a typical hazardous waste produced from sulfuric acid industry, which always contains a significant level of valuable metals. About 12 million tons of pyrite cinder are generated in China annually, and the utilization rate is less than 50% due to the complex relationship of various components. In this study, a process of acid leaching was used to separate and recover copper from the pyrite cinder (containing 0.60 wt.% Cu and 56.01 wt.% Fe). Both sulfuric acid and phosphoric acid systems were taken into consideration, and the effect of leaching parameters on the recovery of copper was conducted to investigate the effect of selective leaching in the two acidic systems. The results indicated that the recovery of copper in sulfuric or phosphoric acid system was as high as 89.6 wt.% and 82.3 wt.%, respectively. It was found that part of copper in pyrite cinder closely combined with silicon, which was impossible to separate during the acid leaching process.
Pyrite cinder Acid leaching Copper Separation
This is a preview of subscription content, log in to check access.
The authors would express their sincere thanks to the National Natural Science Foundation of China (No. 51574283 and No. U1960114), Research Innovation Foundation for Postgraduate of Central South University (No. 2018zzts077).
Wu D, Liu Y, He H, Zhang Y (2016) Magnetic pyrite cinder as an efficient heterogeneous ozonation catalyst and synergetic effect of deposited Ce. Chemosphere 155:127–134CrossRefGoogle Scholar
Fernández-Caliani JC (2012) Risk-based assessment of multimetallic soil pollution in the industrialized peri-urban area of Huelva, Spain. Environ Geochem Health 34(1):123–139CrossRefGoogle Scholar
Giunti M, Baroni D, Bacci E (2004) Hazard assessment to workers of trace metal content in pyrite cinders. Bull Environ Contam Toxicol 72(2):352–357CrossRefGoogle Scholar
Zhang S, Rajendran S, Henderson S, Zeng D, Xiao R, Bhattacharya S (2015) Use of pyrite cinder as an iron-based oxygen carrier in coal-fueled chemical looping combustion. Energy Fuels 29(4):2645–2655CrossRefGoogle Scholar
Fellet G, Marchiol L, Perosa D, Zerbi G (2007) The application of phytoremediation technology in a soil contaminated by pyrite cinders. Ecol Eng 31(3):207–214CrossRefGoogle Scholar
Zhu D, Chen D, Pan J, Zheng G (2011) Chlorination behaviors of zinc phases by calcium chloride in high temperature oxidizing-chloridizing roasting. ISIJ Int 51(11):1773–1777CrossRefGoogle Scholar
Liu J, Wen S, Chen Y, Liu D, Bai S, Wu D (2013) Process optimization and reaction mechanism of removing copper from an Fe-Rich pyrite cinder using chlorination roasting. J Iron Steel Res (Int) 20(8):20–26CrossRefGoogle Scholar
Xu D, Wang P, Shen B (2016) Synthesis and characterization of sulfur-doped carbon decorated LiFePO4, nanocomposite as high performance cathode material for lithium-ion batteries. Ceram Int 42(4):5331–5338CrossRefGoogle Scholar
Zhang J, Yan Y, Hu Z (2018) Utilization of low-grade pyrite cinder for synthesis of microwave heating ceramics and their microwave deicing performance in dense-graded asphalt mixtures. J Cleaner Prod 170:486–495CrossRefGoogle Scholar