Molybdenum Recycling Methods

At present, molybdenum waste re-cycling and utilization of many methods, but generally are based on the fire method, supplemented by the wet method, the common methods are as follows:
Sublimation method: This is a method based on the metal molybdenum can be oxidized into molybdenum trioxide at a certain temperature and sublimation and capture recovery, the recovery rate can reach 98%. This method is mainly used for the recycling of waste molybdenum powder, molybdenum strips, molybdenum flakes, molybdenum wire, molybdenum rhenium alloy, and high-speed steel grinding waste.

Zinc melting method: this method is mainly through the heating, distillation, roasting recovery of cemented carbide and superalloy waste in the alloy elements, such as cobalt (recovery rate of 97%), molybdenum (recovery rate of 96.2%), tungsten (recovery rate of 98.4%).
Oxidation roasting and acid leaching method: This method is mainly used for the recycling of molybdenum-containing catalysts, with recovery rates of 97% and 95% for cobalt and molybdenum, respectively.
Sodium carbonate roasting and leaching method: this method is also mainly used for the recovery of molybdenum-containing spent catalysts, but mainly for the recovery of cobalt and nickel, and their leaching rates are above 90%.
Alkali leaching method: It is mainly used for the regeneration and recovery of molybdenum and nickel-containing waste catalysts, and the leaching rates of molybdenum, aluminum and nickel are 96.9%, 86.7% and 90.1% respectively.