Method for separating electrolytic manganese anode mud to produce electrolytic manganese metal and recovering lead

Abstract

The invention discloses a method for separating electrolytic manganese anode mud to produce electrolytic manganese metal and recovering lead. The method comprises the following steps of S1, mixing andagitating the electrolytic manganese anode mud, a sulfuric acid solution and a waste molasses aqueous solution, then adding iron powder, and separating leachate and a leach residue after a reaction is completed; S2, adding H2O2 into the leachate, so as to obtain COD (Chemical Oxygen Demand) removed leachate; S3, adding ammonium sulfide or sodium dimethyl dithiocarbamate into the COD removed leachate, adding ammonia water, so as to obtain manganese sulfate purifying liquor, and electrolyzing the manganese sulfate purifying liquor, so as to obtain a manganese metal product. While producing theelectrolytic manganese metal product, the method can be also used for recovering lead concentrate with the lead content of 50 percent or above, and thus, the clean and efficient utilization of the electrolytic manganese anode mud is realized.

Description

technical field [0001] The invention relates to the technical field of electrolytic manganese anode slime treatment, in particular to a method for separating and producing electrolytic metal manganese from electrolytic manganese anode slime and recovering lead. Background technique [0002] As an important metallurgical and chemical raw material, manganese has a very important strategic position in the national economy. my country's iron and steel production accounts for about three-quarters of the world's total output. "No manganese can't make steel." In iron and steel smelting, manganese has a relatively high affinity with oxygen and sulfur, and it is a desulfurizer and deoxidizer for molten steel. Due to its high purity and less impurities, electrolytic manganese is an important alloying element in the production of stainless steel, high-strength low-alloy steel, aluminum-manganese alloy, copper-manganese alloy, etc. It is an indispensable raw material in the production ...

AI Technical Summary

Problems solved by technology

Due to the complex mineral composition and structure of electrolytic manganese anode slime, the symbiotic relationship between lead and manganese hydrated oxides is very close, and most manganese oxides are colloidal and colloidal ring structures, so simple mechanical separation methods cannot be used for purification. Manganese and recycled lead

At present, except for a small amount of electrolytic manganese anode slime used in the manganese ore leach solution of the electrolytic manganese plant to remove iron, most of it is disposed of as industrial solid waste or sold to smelters at a low price as an ingredient for refining manganese-ferroalloy raw materials. Substances such as lead and selenium in manganese anode slime are volatile at high temperature, and nearly 50 kg of lead metal will be volatilized per ton of manganese anode slime, which not only wastes lead resources, but also causes serious environmental pollution and damages people's lives and health

[0005] In recent years, scientific researchers have sought different treatment methods for the characteristics of electrolytic manganese anode slime, mainly to study the use of manganese anode slime as the production of manganese sulfate, manganese carbonate, chemically pure manganese dioxide or batteries, manganese oxide products and lithium manganate However, there are still problems such as high production cost, low recovery rate of valuable elements, high energy consumption, long process route, and even secondary pollution.

Under the premise that the national environmental protection and energy saving policies are becoming increasingly strict, it is generally not adopted by factories

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