Separation and recovery method for molybdenum back-extraction three-phase substances in uranium-molybdenum ore hydrometallurgy

Abstract

The invention belongs to the technical field of uranium-molybdenum ore hydrometallurgy, and relates to a uranium-molybdenum ore hydrometallurgy molybdenum reextraction three-phase substance separation and recovery method which comprises the following steps: putting a molybdenum reextraction qualified solution discharged from a water phase outlet of a molybdenum reextraction mixing clarifier into a buffer tank to obtain a molybdenum qualified solution containing three-phase substances; carrying out primary solid-liquid separation, and washing a filtered three-phase filter cake with clear water; uniformly mixing the washed three-phase filter cake with uranium-molybdenum ore leaching pulp, performing sulfuric acid leaching, and performing subsequent extraction, back extraction and other processes on the leachate; conveying a solution containing an organic phase and a water phase, which is subjected to solid-liquid separation and washing to remove precipitates, into a clarifier for standing and layering; mixing an organic phase subjected to standing layering with a poor organic phase subjected to molybdenum back extraction, and carrying out a subsequent extraction process; and conveying the water-phase molybdenum qualified liquid subjected to standing and layering to a purification process to prepare an ammonium molybdate product. The structure of the three-phase substance is effectively destroyed, so that an organic phase, a water phase and a solid phase are fully separated and recycled.

Description

technical field [0001] The invention belongs to the technical field of uranium-molybdenum ore wet smelting, and specifically relates to a method for separating and recovering three-phase substances produced by ammonia water and molybdenum stripping in the main process flow of primary uranium-molybdenum ore acid leaching and amine extraction. Background technique [0002] Molybdenum is a traditional advantageous mineral resource in my country. With the development of my country's economy, the application field of molybdenum has been continuously expanded, and the molybdenum industry has developed rapidly. The reserves are still abundant, but its non-renewability determines that molybdenum cannot be extracted solely by unrestrained mining from natural ores. It is necessary to improve smelting technology and increase the comprehensive recovery and utilization of molybdenum resources. Most of my country's molybdenum resources are co-existing and associated molybdenum ore, and the...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a method aimed at the three-phase matter produced by the acidic wet smelting molybdenum stripping of primary uranium and molybdenum ore, which causes the loss of organic phase, the loss of uranium and molybdenum metal, the high consumption of purifying agent, and the potential risk of affecting product quality. The separation and recovery method of molybdenum stripping three-phase material in uranium-molybdenum ore hydrometallurgy belongs to the physical separation method, which effectively destroys the structure of the three-phase material, fully separates and recovers the organic phase, water phase, and solid phase, and then makes the qualified molybdenum liquid The amount of powdered activated carbon added during purification and impurity removal is reasonably and effectively controlled, the purification efficiency is increased, the quality of ammonium molybdate produced by the acid precipitation process is significantly improved, the loss of the organic phase of the system is reduced, and the existing uranium-molybdenum ore wet smelting is effectively solved. The waste of resources in industrial development, the introduction of impurity ions in secondary recycling, high energy efficiency consumption, and poor effects have realized the development ideas of quality improvement, efficiency increase, and cost reduction in production and operation.

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