Studies on the processing of a low grade molybdenite concentrate by lime roasting

Selective recovery of molybdenum from spent HDS catalyst using oxidative soda ash leach/carbon adsorption method

“…So, for further adsorption studies, LL pH was kept constant at 0.75. In a similar study by Singh et al [23] reported best adsorption results at pH 2 which is contradictory to our findings. Fig.…”

Molybdenite alkali fusion and leaching: reactions and mechanism

“…It has been found that molybdenite leaches slowly in dilute (1-4 M) nitric acid at room temperature [3] and the leaching of MoS 2 by sulfuric acid is a very slow process [4]. Beyond these studies, other pyrometallurgical processes such as chlorination [5], salt roasting [6], lime roasting [7] and carbothermal reduction of molybdenite in the presence of lime [8] were investigated. Presently, increasing the dissolution rate of molybdenite is a key problem for this mineral.…”

Leaching of impurities for the up-gradation of molybdenum oxide and cementation of copper by scrap iron

“…Lowgrade (20-45% Mo) and high grade (50-60% Mo) sulphide ores are treated by various procedures (van den Berg et al, 2002;Gupta, 1992). Researchers have reported the roasting of molybdenite with lime or soda ash followed by sulphuric acid leaching and selective adsorption of molybdenum with activated charcoal (Singh et al, 1988;Junea et al, 1996). Molybdenum concentrates, as usually marketed, contain the mineral MoS 2 , along with up to 10% silicious material as well as traces of iron, copper, and lead minerals.…”