Resumo

BAZAN, VANESA; BRANDALEZE, ELENA  e  COLQUE, ENZO. KINETICS ROASTING LOW GRADE CONCENTRATES MOLYBDENITE. Dyna rev.fac.nac.minas [online]. 2013, vol.80, n.181, pp.146-152. ISSN 0012-7353.

Molybdenum is an attractive metal for the steels and cast iron production because it promotes a strong hardening, increasing the mechanical strength when the alloy is subjected to controlled cooling in a critical temperature range. This has caused a considerable increase in demand for molybdenum products, which comes from molybdenite concentrates (MoS₂) as secondary products of porphyry copper deposits. In this paper we present results of a molybdenite concentrate low grade, with slightly different compositions, which reflect differences in the operating results of roasting. These differences are due in large part to the reaction mechanisms identified as impurities in the concentrate as Fe Tests are made to determine the optimal conditions for recovery of Mo and the rate constants determined for each sample.

Palavras-chave : Roasting; molybdenite; low grade; kinetics; impurities.

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