Harmless treatment method for electrolytic manganese residues

Abstract

The invention discloses a harmless treatment method for electrolytic manganese residues. The harmless treatment method comprises the steps of crushing, weighing, preparing an extracting agent, building a leaching device, leaching and the like. According to the method, pollutants in the electrolytic manganese residues can be transferred from a solid phase to a liquid phase through a leaching method, so that the pollutants in the manganese residues are thoroughly removed, harmlessness of the electrolytic manganese residues is achieved, and resource utilization of the electrolytic manganese residues is facilitated; the harmless treatment method disclosed by the invention has the advantages of low cost, simplicity in operation and the like, and also has relatively high economic benefits and environmental benefits; according to the method, a high-temperature and high-pressure environment is formed in the leaching column, the solubility of Mn < 2 + > and NH4 < + > in the electrolytic manganese residues in deionized water can be increased through high temperature and high pressure, and the reaction rate can be increased through high temperature and high pressure; intermittent centrifugal force generated in the leaching column plays a role in stirring the interior of the leaching column, so that the leaching speed can be increased again; therefore, the extraction effect is improved, the extraction time is shortened, the use amount of the extraction agent can be saved, and the cost is reduced.

Description

technical field [0001] The invention relates to a harmless disposal method of electrolytic manganese slag, belonging to the technical field of industrial solid waste disposal methods. Background technique [0002] Electrolytic manganese slag is the acidic waste slag produced in the process of electrolytic manganese ore, which contains a large amount of harmful substances (such as Mn). 2 + , NH 4 + Wait). According to statistics, every 1 ton of electrolytic manganese powder produced will produce 8-12 tons of electrolytic manganese slag. At present, the accumulated electrolytic manganese slag in my country has exceeded 150 million tons, and it is rising at a rate of 10 million tons. At present, most of the electrolytic manganese enterprises in my country send the waste residue to the storage yard, and use the dam-building wet method for storage. It also caused a lot of waste of resources. [0003] At present, electrolytic manganese slag can be used as one of the raw mater...

AI Technical Summary

Problems solved by technology

The Chinese patent with the authorized notification number CN104307849B discloses a solidification / stabilization treatment method for electrolytic manganese slag. In this patent, quicklime is used as the main stabilization material, although this material can effectively reduce the Mn in electrolytic manganese slag. 2+ concentration, but for NH 4 + The effect is poor, and adding a large amount of quicklime will greatly increase the pH value of the leachate

The Chinese patent with the authorized notification number CN104690080B discloses a method for harmlessly treating electrolytic manganese slag directly in the filter plate frame. In this patent, the stabilized material is sodium dihydrogen phosphate + magnesium oxide + polyacrylamide + calcium oxide. The material can simultaneously reduce Mn in electrolytic manganese slag 2+ with NH 4 + concentration, but the cost is relatively high

At present, there is no stabilizing material that can make Mn in electrolytic manganese slag 2+ with NH 4 + The concentration and pH value meet the discharge standard at the same time

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