Method for producing sulfuric acid from electrolytic manganese residues

A technology for electrolyzing manganese slag and sulfuric acid, which is applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., and can solve problems such as low utilization rate and waste of resources

Inactive Publication Date: 2014-03-05
NINGXIA TIANYUAN MANGANESE LIMITED
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 elect...

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  • Method for producing sulfuric acid from electrolytic manganese residues
  • Method for producing sulfuric acid from electrolytic manganese residues
  • Method for producing sulfuric acid from electrolytic manganese residues

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Embodiment Construction

[0017] A method for producing sulfuric acid by using electrolytic manganese slag, the steps of the production process include: (1) drying treatment of electrolytic manganese slag; (2) adding coke and lime for raw material preparation (3) fine grinding; (4) raw material (5) Calcination of raw materials; (6) Production of acid from calcination flue gas.

[0018] The specific process includes:

[0019] (1) Pretreatment of manganese slag: the original manganese slag (with a moisture content of about 25%) is dried with a downstream rotary dryer to a moisture content of less than 2%, and the dried manganese slag enters the plant for sulfuric acid production. The raw material batching station is waiting for batching. The batching is measured by a belt weighing scale;

[0020] (2) Raw material batching: The batching station uses an 8-meter round warehouse for various material blending, and the raw materials that need to be blended are coke, manganese slag, industrial gypsum and ...

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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...

Claims

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Application Information

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IPC IPC(8): C01B17/74
Inventor 贾天将
Owner NINGXIA TIANYUAN MANGANESE LIMITED
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