Molybdenum Extraction Methods from Nickel-molybdenum Mixture

China has rich resources of molybdenum, is the world's largest molybdenum resources in the country, including molybdenum reserves accounted for 44% of the world molybdenum reserves. At present, China is the world's largest molybdenum producer and consumer. China molybdenum supply and demand to the international molybdenum price changes have a greater impact. Development of molybdenum extraction technology can not only reflects the level of industry technology, and can provide some support for the development of the industry. In recent years, the technology of molybdenum extraction from different materials is in the development process, providing some reference and support for molybdenum industry. There will brief introduce some methods of extraction molybdenum from nickel-molybdenum mixture. Extracted from the mixture of nickel-molybdenum in molybdenum extraction technology is more mature, so the corresponding extract molybdenum patented technology is greater, which is mostly used in lixiviation process.

1. Using wet process to extract molybdenum form nickel molybdenum ore: firstly the nickel-molybdenum ore was subjected to atmospheric leaching with sodium hydroxide solution. After leaching, adding air, oxygen-enriched air or oxygen into the slurry, and then extract the molybdenum.

2. Using lixiviation process to extract nickel-molybdenum ore: using ozone or hydrogen peroxide as an oxidizing agent and using dilute sodium hydroxide or dilute hydrochloric acid as an activated media extracts nickel-molybdenum paragenic ore for leaching molybdenum.

3. Using alkaline leaching solution to extract molybdenum from nickel molybdenum ore: using Fe3+ as a precipitating agent was added to the nickel-molybdenum alkali leaching solution and adding a buffer agent to adjust the pH of the solution. The resulting precipitate containing molybdenum was desorbed by ammonia desorbed ammonium. After that we obtained molybdic acid ammonium solution.

4. Extracted molybdenum from stone coal ore containing nickel and molybdenum: to grain the ore into powder and add sodium carbonate into it. After high temperature melting, obtain a nickel-iron alloy and slag. Then using water to soak slag, obtained leaching solution containing molybdenum.