Investigations on Processing Low-Grade Molybdenum Concentrate by the Nitric-Acid Method

摘要

Investigations on processing the low-grade molybdenite concentrate of the Bugdainskoe deposit by the nitric-acid method are carried out. The leaching modes (S : L ratio, reagent concentration, process duration, and temperature) are optimized. In optimal modes, the recovery of molybdenum from the starting concentrate into the solution exceeds 95%. The penetrating recovery from the ore into the commercial product is at a level of 85-86%. Investigating the process kinetics showed that the decomposition of the concentrate by nitric acid proceeds in the initial point in time in the kinetic mode. The addition of sulfuric acid into the nitric acid solution accelerates the process.