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Successful research and development of nickel hydrometallurgical processing molybdenum comprehensive recovery of Mo, Ni, U, V technology has the price of the metal. Nickel-molybdenum ore is a kind of polymetallic ore resource unique to China. It is mainly distributed in Zunyi, Guizhou and Zhangjiajie, Hunan. It is a sedimentary polymetallic deposit with associated precious metals. The local people of this mine are also called stone coal . Nickel-molybdenum containing valuable metals except Ni, Mo, further containing platinum group metals and rare earth and radioactive elements U, is a complex multi-metal ore, has great economic significance, and NW wherein Zunyi Hunan Ni-Mo The mineral resources are of great mining value due to their large reserves of resources, high nickel and molybdenum and high grades of precious metals. China's nickel-molybdenum ore, nickel-molybdenum co-production is closely related. Some nickel-molybdenum minerals have very small grain size, which is difficult to select and mine. It is difficult to comprehensively recover, although many units and scientific workers carry out extensive experimental research and small-scale production. But there has been no ideal method of beneficiation and smelting. At present, there are basically two kinds of nickel-molybdenum ore treatment methods commonly used: 1) nickel-molybdenum ore→oxidation roasting→mining furnace smelting→Ni-Mo alloying process, nickel-molybdenum alloy containing about 5% Ni, containing Mo 8%~14% As a primary product entering the market, the recovery rate of molybdenum in the process is low; 2) decarburization→baking (sintering)→alkali leaching→purification→acid precipitation→calcination→molybdenum oxide process to produce industrial grade molybdenum oxide. The decarburization process takes place in the open air, causing serious environmental pollution. The existing nickel-molybdenum ore concentrated acid leaching-solvent extraction process has the advantages of simple process, shortcomings of SO 2 pollution, and environmental pollution caused by the lack of comprehensive recovery of metal uranium . Another process is high temperature, oxidative leaching with oxygen, although the SO 2 contamination is removed, but the disadvantage is that the leaching rate is low. These processes and roasting processes all have environmental pollution caused by uranium, and also cause environmental pollution caused by harmful gases such as SO 2 , unstable product quality, low metal recovery rate, and difficulty in comprehensive recovery; 500 t ammonium molybdate / a. The all-wet treatment process of nickel-molybdenum ore realizes comprehensive recovery of valuable metals, no pollution of harmful gases to the environment, high metal recovery rate, and comprehensive utilization of minerals. The main feature of the research process is the use of weak alkaline high temperature oxygen pressure leaching, high metal leaching rate, less impurity leaching, relatively simple purification work, low reagent consumption, low cost, high economic efficiency, and comprehensive recovery of radioactive elements uranium and tailings. The uranium content is less than 0.005%, and the specific activity of radioactivity is less than 1000 Bq/kg, which meets the national exemption standard value.
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