1. 1. World Steel Association: Steel Industry By-Products, World Steel Association Publishers, Brussels, 2010, pp. 147–50.
2. World Steel Association: Steel Statistical Yearbook. World Steel Association Publishers, Brussels, 2014, pp. 2–3.
3. 3. D. Senk, H.W. Gudenau, S. Geimer, and E. Gorbunova: ISIJ Int., 2006, vol. 46, pp. 1745–51.
4. M.V. Cantarino, C. de CarvalhoFilho, and M.B. Mansur: Hydrometallurgy, 2012, vol. 111, pp. 124–28.
5. 5. H.W. Xiong and Y.D. Dai: Energy China, 2012, vol. 34, pp. 5–7.