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The use of soft manganese oxidation and reduction of sulfide ore in the 1970s developed the sulfide minerals (such as pyrite, sphalerite, chalcopyrite) combined with soft manganese leaching process. Wide Pyrolusite sources, and low prices, has been used in wet flue gas desulfurization process sulfur, it loose porous and hydrophobic dispersed in molybdenite, which will help transport the gas, increasing the effective reaction area and reactivity Center ; Further, MnO2 strong oxidation at lower temperatures can promote oxidative decomposition PLE directly or molybdenite, SO2 MnO2 oxidation of the gas can be converted into more stable manganese sulfate. The process has the process short, simple equipment, environmental pollution characteristics, industrial production has been successfully achieved, the process is expected to be able to comprehensive recovery of molybdenum, rhenium, manganese a resource, short process of clean metallurgical processes. 
 

Ferromanganese can also use as a reducing agent is added to the mix of molybdenum-hui granulation, melt stirring graphite crucible, calcined product was obtained as molybdenum iron, copper, sulfur content of less than 0.05%, respectively, 0.1 %. 
 

This process can increase the total yield of molybdenum 1% to 2%. Adding iron oxide has the following functions: ① catalytic transfer oxygen source to accelerate the oxidation desulfurization reaction; ② calcined material dispersion, inhibition produced by sintering MoO3 melting phenomenon; ③ part of the molybdenum salt formation, prevent MoO3 in roasting and smelting processes high temperature sublimation. 

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