One-Step Extraction of Antimony in Low Temperature from Stibnite Concentrate Using Iron Oxide as Sulfur-Fixing Agent

Yun Li 1, Yongming Chen 1,*, Haotian Xue 2,*, Chaobo Tang 1, Shenghai Yang 1 and Motang Tang 1 1 School of Metallurgy and Environment, Central South University, Changsha 410083, China; [email protected] (Y.L.); [email protected] (C.T.); [email protected] (S.Y.); [email protected] (M.T.) 2 Qinghai Provincial Research and Design Academy of Environmental Sciences, Xining 810000, China * Correspondence: [email protected] (Y.C.); [email protected] (H.X.); Tel./Fax: +86-731-8883-0470 (Y.C.); +86-971-8172-559 (H.X.)