Method for recovering molybdenum and lead from wulfenite

A technology of molybdenum lead ore and lead molybdate, which is applied in the field of lead and molybdenum recovery, can solve the problems of safety and environmental disadvantages, hydrogen sulfide escape, product quality of thiomolybdate discoloration, etc., and achieve the effect of avoiding the leaching process

CN114686706AActive Publication Date: 2022-07-01ZHENGZHOU UNIV

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Applications(China)
Current Assignee / Owner: ZHENGZHOU UNIV
Publication Date: 2022-07-01

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Abstract

The invention relates to a method for recovering molybdenum and lead from molybdenum lead ore, belongs to the technical field of metal smelting, and solves the problems that in the prior art, strong base is adopted for leaching the molybdenum lead ore, the lead content in an obtained molybdenum product exceeds the standard, and thorough separation of the molybdenum and the lead cannot be achieved; sodium sulfide is used for leaching, temperature is high, and energy consumption is large; the use amount of sodium sulfide is difficult to control in the sodium sulfide leaching process; and hydrogen sulfide gas is generated by acidification in the process of recovering molybdenum after precipitating lead after leaching by a sodium sulfide method. The method for recovering the molybdenum and the lead from the wulfenite, provided by the invention, comprises the following steps: roasting the wulfenite to obtain roasted lead molybdate; adding a leaching agent and an auxiliary leaching agent to digest and leach the roasted lead molybdate, separating to obtain a leaching solution containing molybdenum and leaching residues enriched with lead sulfate, and directly using the leaching residues for further purification of lead; and extracting molybdenum from the leachate by using an extracting agent to obtain raffinate and molybdenum-containing extract liquor. And clean extraction of the wulfenite is realized.

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Description

technical field

[0001] The invention relates to the technical field of metal smelting, in particular to a method for recovering molybdenum and lead from molybdenum-lead ore. Background technique

[0002] Molybdenum is a very important rare metal. It is widely used in metallurgy, chemical industry, military, electronics, biomedicine, agriculture, environmental protection and aerospace due to its excellent physical and chemical properties such as high strength, high melting point, grinding resistance and corrosion resistance. , become an important raw material and irreplaceable strategic material in the national economy. Molybdenum-lead ore is one of the important ore sources for molybdenum production. It is often produced in the oxidation zone of lead-zinc deposits. Zinc ore, hemimorphite, limonite, hard manganese ore, perspective stone and other symbiosis.

[0003] For a long time, the leaching of molybdenum-lead ore has been carried out by the alkaline process, namely the...

Claims

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