基金This work was financially supported by the Korea Institute of Energy Technology Evaluation and Planning （KETEP） of the Korea Government Ministry of Knowledge Economy （No. 20122010300041） and the National Research Foundation of Korea （No. 2011-0091839）.
基金This research was supported by a grant from the Fundamental R＆D Program for Energy （No. 2012T100100092, development of pyro-metallurgical technology for low quality urban mining by-products）, funded by the Ministry of Knowledge Economy, Korea.