Novel roasting process in ammonium molybdate and molybdenum oxide production

Abstract

The invention belongs to the technical field of molybdenum process metallurgy, mainly relating to a novel roasting process in ammonium molybdate and molybdenum oxide production. A one-step roasting method is adopted, alkali and composite catalysts are added into raw materials containing molybdenum to be directly roasted and dipped into water, and the ratio of raw materials containing the molybdenum to alkali to composite catalyst is 1.0: less than or equal to 0.38: less than or equal to 0.05. The invention adopts the one-step roasting method, thus effectively solving the problem of air pollution, shortening production period, lowering production cost and energy consumption and improving the recovery rate of the molybdenum. The novel roasting process of the invention is suitable for roasting all raw materials containing the molybdenum.

Description

technical field

[0001] The invention belongs to the technical field of molybdenum metallurgy, and mainly relates to a new roasting process in the production of ammonium molybdate and molybdenum oxide. It is suitable for the roasting of all molybdenum-containing raw materials. Background technique

[0002] The traditional wet molybdenum metallurgy process uses low-grade molybdenum fine powder or nickel-molybdenum ore as raw material. After crushing, roasting and desulfurization, the molybdenum element in the raw material is converted into molybdenum trioxide, then mixed with alkali and roasted, and sodium molybdate is obtained by water leaching. The aqueous solution is then enriched by ion exchange. Because the two-step roasting method is adopted, that is, the crushed molybdenum-containing raw materials are roasted and desulfurized for several 10 hours to obtain molybdenum trioxide. Because molybdenum trioxide is an acidic oxide, it is easy to react with alkali, so the desul...