Decomposition method for molybdenite by wet process

Abstract

The invention discloses a molybdenite whole-wet method decomposition method. The molybdenite, the chloride electrolyte and the water are added into a membraneless electrobath with an ultrasonic generator and are stirred to prepare the ore pulp with the ore pulp mass percentage ranging from 5 to 80 percent and the chloride electrolyte mass percentage ranging from 5 to 50 percent, the mixture is electrolyzed and oxidized under the action of ultrasonic and at a temperature ranging from 0 to 100 DEG C, in the electroanalysis process, the current density of the anode is controlled to be 50 to 1200 A / m<2>, the ultrasonic is emitted continuously or intermittently, the electrolyzed and oxidized molybdenite is converted into the molybdena or molybdate compound. By the ultrasonic field and the electric field coupling action, the method reinforces the wet method decomposition process of the molybdenite, overcomes the retardation of the oxide passive film generated in the oxidization leaching process of the conventional wet method, and improves the current efficiency and the Mo leaching rate of the prior membraneless electrooxidation leaching technique.

Description

technical field [0001] The invention relates to an all-wet decomposition method of molybdenite. Background technique [0002] Molybdenite is widely distributed and the most important molybdenum mineral in industrial applications. At present, my country's molybdenum concentrate production capacity has reached nearly 70,000 tons per year, accounting for about 7% of the world's total. Although the molybdenum deep processing capacity has a certain scale, there are more than 70 scientific research and production plants for molybdenum products, molybdenum alloys, and molybdenum chemicals. , but most of the extraction metallurgy of molybdenum adopts the traditional roasting-ammonia leaching process, which has the disadvantages of serious pollution of the environment by sulfur-containing flue gas, low recovery rate of Mo and associated Re, and poor product quality. [0003] The full wet decomposition process of molybdenite was successfully developed in the late 1960s. Compared with ...

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Problems solved by technology

[0005] The electro-oxidation method has been mostly used in the treatment of low-grade molybdenum minerals. Its main disadvantages are that the current efficiency is not high and the power consumption is large, which leads to high production costs of this method (Yu Qinghua, Chen Tingzhang. Recovery of molybdenum from molybdenum tailings[J] .Mining and Metallurgy Engineering, 1992, 12(2))

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