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To solve Hui molybdenum concentrates containing flue gas SO2 pollution and recycling issues rhenium in the roasting process, when roasting add lime, molybdenum and rhenium were transformed into high rhenium and molybdenum calcium calcium. Concentrate into calcium sulfate sulfur emissions of SO2 from flue gas out greatly reduced, and the resulting calcine leaching dilute sulfuric acid can be used in order to facilitate the realization of molybdenum (rhenium) and impurities (calcium sulfate, insoluble residues ) separation. 
 

Lime roasting process for generating water-insoluble molybdates CaMoO4, and the step of baking soda ash is used to generate a soluble molybdate Na2MoO4. It is easy to further treatment with acid or alkali to give the molybdenum trioxide (MoO3). Add Na2CO3 roasting molybdenite can be selectively converted into soluble molybdenum and rhenium sodium, calcine by flooding after the separation of molybdenum and rhenium and other insoluble impurities can be achieved, the leaching solution after purification using activated carbon adsorption and separation of molybdenum rhenium, sulfur into sulfate concentrates, and inhibit the generation part of SO2. Add soda firing process suitable for the treatment of low-grade molybdenum concentrate, molybdenum from molybdenum recovery either alkali leached calcine, molybdenum can be recovered from the spent catalyst. 
 

Lime enhanced reduction process using H2, CO and C as a reducing agent, the molybdenite reduced to molybdenum metal. MoS2 lime reinforced carbon thermal reduction process has a number of advantages, including the feasibility of the reaction is thermodynamically enhanced; improved dynamics and sulfur fixed, so that there will be no escape of SO2 into the atmosphere. Therefore, it is in many other base metals and molybdenum extraction (for example, copper, nickel, zinc) from molybdenum sulfide or sulfide ores in both attractive. 

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