A kind of method for removing manganese dithionate in manganese ore desulfurization liquid

Abstract

The invention discloses a method for removing manganous dithionate in manganese ore desulfurizing liquid. Persulfate is added into the manganese oxide ore desulfurizing liquid, stirred and dissolved,ferrous sulfate is added, dithionate radical of the manganous dithionate in the manganese oxide ore desulfurizing liquid is oxidized into sulfate radical through sulfate radical and hydroxyl radical generated by high-order oxidation reaction between the persulfate and the ferrous iron, and thus the manganous dithionate in the manganese oxide ore desulfurizing liquid is removed. Through the method,purity of a manganese sulfate mother solution can be improved effectively, no energy needs to be consumed additionally to heat the manganese ore desulfurizing liquid, no acid or alkali needs to be consumed to adjust the pH of the desulfurizing liquid, technological conditions are simple and mild, operability is high, and industrialized application is easy to achieve.

Description

technical field [0001] The invention relates to a method for removing manganese dithionite in manganese ore wet desulfurization liquid, which is used for improving the purity of manganese sulfate mother liquor after manganese ore wet desulfurization. Background technique [0002] Manganese metal is an important industrial raw material, which is widely used in iron and steel smelting, nonferrous metallurgy, battery production, electronic products and other industries. At present, the preparation of metal manganese mainly adopts the technology of hydrometallurgical processing of manganese ore. Due to the MnO in manganese ore 2 not with H 2 SO 4 Direct reaction, in the process of processing manganese ore to prepare metal manganese by hydrometallurgical process, reduction roasting-acid leaching process is required, and MnO is roasted at high temperature 2 reduction to acid-soluble MnO, followed by H 2 SO 4 Solution leaching to generate MnSO 4 The solution is electrolyzed ...

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Problems solved by technology

However, using this method to remove manganese dithionate in manganese ore desulfurization liquid requires a reaction at the boiling point temperature under the corresponding pressure, so a large amount of heat energy is consumed for heating the desulfurization liquid; at the same time, the desulfurization liquid is pressurized to 1.05-1.20MP, High requirements on processing equipment, large investment, and because the solubility of manganese sulfate decreases with the increase of temperature, when the manganese ore desulfurization liquid is heated to the boiling point, the high concentration of manganese sulfate in the manganese ore desulfurization liquid is easy to crystallize, thus solidifying on the inner wall of the equipment, Increase the difficulty of subsequent cleaning and utilization, therefore, this method is difficult to be used in industrialized continuous production

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