Method for preparing building cementing material from electrolytic manganese metal leaching residues

Abstract

The invention relates to the field of building materials, in particular to a method for preparing a building cementing material from electrolytic manganese metal leaching residues. According to the method, the electrolytic manganese metal leaching residues are treated by adopting concentrated sulfuric acid; sulfate slag and acid-leached electrolytic manganese metal liquid are generated; by removing various metals from the acid-leached electrolytic manganese metal liquid, composite aluminum iron phosphate, copper-cobalt-nickel sulfide concentrate, manganese carbonate concentrate and ammonia water are effectively recovered and mixed with the sulfate slag, the mixture is reacted with calcium hydroxide generated by reacting quick lime and water, and mixed with Portland cement to generate the cementing material; the activity of the electrolytic manganese slag is improved, and the gelling property of the electrolytic manganese slag can be fully excited; the prepared building cementing material can be prepared into cement masonry mortar, plastering mortar, dry-mixed mortar, exterior wall plastering mortar, baking-free bricks and the like, the mixing amount of cement in the cementing material is reduced, the setting time of the cementing material can be adjusted, the strength is high, the cementing material is healthy and environmentally friendly, the cost is reduced, and the economicbenefits of enterprises are improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing building gelling materials by using electrolytic metal manganese leaching slag. Background technique [0002] Electrolytic manganese leaching slag is the leaching slag produced in the process of producing electrolytic manganese metal with manganese carbonate and roasted manganese dioxide. Every ton of electrolytic manganese metal product produces 8-10 tons of leaching slag. At present, the amount of leaching slag in my country has reached It exceeds 10 million tons, and it continues to grow by more than 20% every year, which is a huge quantity. At the same time, these slags are directly discarded in the tailings silo without any treatment, which not only occupies a large amount of land resources, but also has a large amount of ammonia nitrogen, manganese ions and heavy metal ions infiltrating into the soil around the slag and small ditches and streams, poll...

AI Technical Summary

Problems solved by technology

However, due to the stability of the system and the strong toxicity of manganese itself, in the prior art, the leached slag of electrolytic manganese is used to directly prepare composite cementitious materials, which fails to effectively improve the activity of electrolytic manganese slag and the removal of heavy metals in manganese slag. The prepared cementitious material has the disadvantages of high cement content and low early strength of the manganese leached slag cementitious material.

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