Electrochemical mineral leaching process

Abstract

The invention discloses an electrochemical mineral leaching process. The electrochemical mineral leaching process comprises the following steps: (1) crushing an acid-soluble mineral to 100 to 300 meshes; (2) adding water of which the volume is 2 to 10 times the volume of the mineral to the mineral obtained in the step (1) to form slurry; (3) adding an electrolyte to the mineral slurry obtained inthe step (2); (4) inserting an anode plate and a cathode plate into the mineral slurry obtained in the step (3), and afterwards performing direct-current electrolysis for 2 to 12 hours at the voltageof 1 V to 15 V and at a current density of 1 A / m<2> to 300 A / m<2>; and (5) after electrolysis is ended, collecting elements which can be electrodeposited under an acidic condition by using the cathodeplate, and performing solid and liquid separation on the mineral slurry to obtain a material solution. According to the electrochemical mineral leaching process, salt electrolysis is used for replacing acid reaction to perform mineral leaching; the reaction is mild and controllable; the salt electrolysis effect is better than a direct acid solution effect; moreover the amount of salt-containing waste water can be greatly reduced; cyclic utilization is realized; and the electrochemical mineral leaching process disclosed by the invention is applicable to processing of various metal minerals, realizes comprehensive utilization of the minerals and is especially applicable to low-grade minerals.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy, and in particular relates to an electrochemical ore leaching process. Background technique [0002] The main characteristics of hydrometallurgy are the large amount of saline wastewater, the difficulty of wastewater treatment, the high content of mineral-depleted impurities, the difficulty of separation, and the high cost of impurity separation. [0003] Taking the rare earth industry as an example, there are two main sources of saline wastewater in the rare earth industry: extraction saponification wastewater and carbon sedimentation wastewater, mainly sodium chloride and ammonium chloride, the amount is very large, and the cost of evaporation and crystallization treatment is high and there is no market demand. affect the survival of the business. Contents of the invention [0004] The purpose of the present invention is to provide an electrochemical leaching process for the problems existing i...

AI Technical Summary

Problems solved by technology

[0002] The main characteristics of hydrometallurgy are large amount of salty wastewater, difficult wastewater treatment, high content of mineral depleted impurities, difficult separation, and high cost of impurity separation

[0003] Taking the rare earth industry as an example, there are two main sources of saline wastewater in the rare earth industry: extraction saponification wastewater and carbon sedimentation wastewater, mainly sodium chloride and ammonium chloride, the amount is very large, and the cost of evaporation and crystallization treatment is high and there is no market demand. affect the survival of the business