Novel roasting process in ammonium molybdate and molybdenum oxide production

A technology of molybdenum oxide and ammonium molybdate, applied in the directions of molybdenum oxide/molybdenum hydroxide, molybdenum compound, inorganic chemistry, etc., can solve the problems of shortening production cycle, production cost and energy consumption, etc.

Inactive Publication Date: 2010-06-30
王希全
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Problems solved by technology

The one-step roasting method not only effectively solves the problem of air pollution, but also shortens th...

Method used

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Embodiment

[0012] This embodiment adopts one-step roasting method. In the roasting furnace, add alkali and composite catalyst to the molybdenum-containing raw material and directly roast the whole roasting time ≤ 1.5 hours, the reaction temperature is 400°C-650°C, and the sodium molybdate obtained after roasting is immersed in water to obtain an aqueous solution of sodium molybdate. Then enriched by ion exchange. Wherein, molybdenum-containing raw material: alkali: composite catalyst=1.0:≤0.38:≤0.05. The composite catalyst is dilumum pentoxide, lead nitrate, quartz and iron oxide, and the mass percent of each component of the composite catalyst is: 3-8% of dilumum pentoxide, 20-30% of lead nitrate, 8-15% of quartz and iron oxide 50-65%.

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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...

Claims

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Application Information

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IPC IPC(8): C01G39/00C01G39/02
CPCY02A50/20
Inventor 王希全常太华
Owner 王希全
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