Method for leaching and separating valuable metals at normal temperature and pressure by wet-ground activated hydrochloric acid

Through the wet grinding activation process and the hydrochloric acid leaching method at room temperature and pressure, combined with the use of ferric chloride and ammonium fluoride, the separation problem of iron, vanadium and titanium in vanadium titanium magnetite is solved, and an efficient leaching of valuable elements and environmentally friendly process is achieved.

CN119710230APending Publication Date: 2025-03-28PANZHIHUA UNIV +1
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Patent Information

Application Number
CN202411945151.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-27
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing technology is difficult to effectively separate iron, vanadium and titanium in vanadium titanium magnetite under normal temperature and pressure.

Method used

The wet grinding activation process is used to wet grind the vanadium titanium concentrate, and leaching is performed under normal temperature and pressure using hydrochloric acid solution. By adding grinding additives such as ferric chloride and leaching additives such as ammonium fluoride, process parameters such as leaching agent formula, temperature, stirring speed and time are optimized.

Benefits of technology

The leaching rate of valuable elements is significantly improved, which is 20% to 30% higher than that of traditional processes, reduces production costs by about 17%, and reduces waste residue, making it easy to follow-up treatment and comprehensive utilization.

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Abstract

The invention relates to a method for leaching and separating valuable metals at normal temperature and pressure by wet-ground activated hydrochloric acid, and belongs to the field of vanadium-titanium-iron concentrate treatment. The method comprises the following steps: S1, preparing a vanadium titano-magnetite concentrate sample; s2, the sample is subjected to wet grinding activation, and an ore grinding auxiliary is added; s3, a hydrochloric acid solution is adopted as a leaching agent, the sample obtained after wet grinding is mixed with the hydrochloric acid solution, and stirring leaching is conducted at the normal temperature and the normal pressure; and S4, after leaching is finished, solid-liquid separation is carried out to obtain leaching residues and leaching liquid, and the leaching rate is calculated. According to the method, the ore grinding aid is added under the normal-temperature and normal-pressure conditions to assist hydrochloric acid in selective leaching and separate iron, vanadium and titanium, so that the production cost is reduced, the environmental pollution is reduced, and meanwhile, the leaching rate is increased. The problem that iron, titanium and vanadium cannot be directly leached and separated from vanadium titano-magnetite iron concentrate hydrochloric acid at normal temperature and normal pressure in the prior art is solved.
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