The presence of arsenic in zinc sulphide concentrates is particularly harmful, because it creates problems in zinc electrolysis. The main source of arsenic in non-ferrous metallurgy is arsenopyrite (FeAsS). In oxidative roasting of zinc concentrates, FeAsS oxidizes to arsenic oxides (As2O3, As2O5). In this connection a natural FeAsS was examined, and also the distribution of arsenic in the products of the roasting process, the cycle of sulphuric acid obtaining and the leaching of zinc calcine were studied. The arsenic contamination of soils in the vicinity of nonferrous metals smelter KCM SA, Plovdiv, Bulgaria as a result of zinc and lead productions has been studied.
1. Boyanov, B. & Peltekov, A. (2012). X-Ray, DTA and TGA analysis of zinc sulfide concentrates and study of their charging for roasting in fl uidized bed furnace. Bulgarian Chemical Communications (44 Spec. Issue), 17-23.
2. Arias-Arce, V., Coronado-Falcón, R., Puente Santibáñez, L. & Lovera-Dávila, D. (2005). Refractory of gold concentrate. Revista del Instituto de Investigación FIGMMG (8) 5-16.
3. Monhemius, A.J. & Swash, P.M. (1999). The Removal and Stabilization of Arsenic from Copper Refining Circuits by Hydrothermal Processing. J. Miner. Met. Mat. Soc. 51 (9) 30-34.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.