Purification method in electrolytic metal manganese production process by multi-mine method

Abstract

The invention discloses a purification method in an electrolytic metal manganese production process by a multi-mine method. The method successively comprises steps that: mixed mineral powder of manganese oxide ore, pyrite and manganese carbonate ore and a crude manganese sulfate solution prepared through sulfuric acid enter a section of a purification tank for primary purification after filter pressing, SDD or BaS is added for removing impurities in a stirring state, and then aluminum sulfate is added for purification; and the purified solution enters a second section of the purification tank for secondary purification after filter pressing, a deep impurity removing drug is added, ammonium sulfide is input for removing zinc, the PH value is checked and adjusted to be in a range from 6.0 to 8.0 after the reaction lasts for one to two hours, and the mixture is transferred to stand in a standing tank after filter pressing. According to the purification method, various heavy metal impurities in the solution are removed after conventional impurity removal and deep purification are performed to the crude manganese sulfate solution, so that quality standards of electrolytic metal manganese solution production are achieved, and good economic and social benefits are provided for reasonably using manganese ore resources and reducing production costs.

Description

technical field [0001] The invention relates to a purification method, in particular to a purification method for removing impurities in the process of leaching manganese oxide ore and manganese carbonate ore to produce electrolytic metal manganese by "multi-ore method". Background technique [0002] Electrolytic manganese metal is widely used in metallurgy, medicine, electronics, communication and other fields. With the development of science and technology, the application of electrolytic manganese continues to expand, and the market demand grows by about 15% annually. The annual production capacity of electrolytic manganese in my country can reach 800,000 tons, accounting for 80% of the world's total production. Over the years, most of my country's electrolytic manganese has been used for export, mainly to Japan, South Korea, Europe and the United States and other countries. [0003] Electrolytic manganese metal is obtained from manganese ore by acid leaching to obtain ...

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Problems solved by technology

[0004] For a long time, the manganese industry has used manganese carbonate ore as the main raw material, but a large amount of manganese oxide-manganese carbonate ore is seldom paid attention to. However, Guangxi is rich in manganese ore resources, ranking first in the country's manganese ore reserves, mainly manganese oxide ore, carbonic acid Manganese ore and manganese oxide-manganese carbonate layered ore exist, but during the multi-ore production test using manganese oxide ore and manganese carbonate ore as raw materials, problems such as high product S and difficulty in removing impurities from heavy metals are encountered. Therefore, it is necessary to provide a A method that can deeply purify a large number of impurities in the manganese sulfate solution after using various manganese ores as raw materials and sulfuric acid leaching reaction, especially to remove various heavy metal impurities, such as Cu, Pb, Ni, Co, As, Sb, etc. Make the final electrolytic manganese metal products meet the industry requirements and standards, solve the difficult problem of impurity removal in the process of producing electrolytic manganese metal by multi-mine method, and make full use of manganese ore resources