Method for producing sulfuric acid from electrolytic manganese residues

Abstract

The invention provides a method for producing sulfuric acid from electrolytic manganese residues, and relates to a method for producing sulfuric acid from electrolytic manganese residues which are generated in the process of producing metal manganese through electrolysis. The method is characterized by comprising the following production process steps of: (1) performing drying treatment on the electrolytic manganese residues; (2) adding coke and lime to prepare a raw batch; (3) fine grinding; (4) preheating the raw batch; (5) calcining the raw batch; and (6) making the acid from the calcining smoke. The method for producing the sulfuric acid from the electrolytic manganese residues provided by the invention has the advantages that the electrolytic manganese residues are taken as the raw materials, the sulfuric acid is made from SO2 gas generated at the tail of a kiln after calcination at a high temperature, the residues after the calcination are used as raw materials for a cement active mixed material and used for cement production in a cement plant, and the sulfuric acid is used for producing electrolytic metal manganese or applied to other fields. Consequently, the influence of the stockpiling of the manganese residues on the surrounding environment is solved, and the manganese residues are recycled to be changed into things of value.

Description

technical field [0001] The invention relates to a method for producing sulfuric acid by utilizing electrolytic manganese slag, relating to a method for producing sulfuric acid by comprehensively utilizing the electrolytic manganese slag in the electrolytic production process of metal manganese. Background technique [0002] Electrolytic manganese slag is the solid waste discharged during the production of manganese metal by electrolysis. About 3.5 tons of manganese slag is produced for every 1 ton of manganese metal produced. The accumulation of manganese slag not only causes great pressure on the environment, but also is an extreme waste of resources. [0003] At present, the raw materials for the production of sulfuric acid are mainly sulfur and pyrite, including smelting flue gas and other sulfur-containing substances. Three acid-making processes are generally used: sulfuric acid, pyrite ore and phosphogypsum. With the development of industry, the shortage of pyrite res...

AI Technical Summary

Problems solved by technology

[0002]Electrolytic manganese slag is the solid waste discharged during the production of manganese metal by electrolysis, about 3.5t of manganese slag is produced for every 1 ton of manganese metal produced, and the manganese slag produced by electrolytic manganese Most of the manganese slag is treated by stockpiling, and the utilization rate is very low. The accumulation of large areas of manganese slag not only causes great pressure on the environment, but also is an extreme waste of resources.

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