Method for combining electrolytic manganese metal waste residues and gypsum to produce cement clinker and ammonium hydroxide

Abstract

The invention relates to a treatment method of electrolytic manganese metal waste residues. The treatment method comprises the following steps: A, grinding gypsum or drying calcined gypsum and then grinding to obtain gypsum powder; B, slurrying the electrolytic manganese metal waste residues, leaching, and adding the gypsum powder; adjusting the pH of a solution to 6.0-6.4, removing iron, carryingout filter pressing to obtain a filter pressing block A and a filter pressing solution A, washing the filter pressing block A with water, and then carrying out filter pressing to obtain a filter pressing block B and a filter pressing solution B; adjusting the pH of the filter pressing solution A to 11.5-12, and carrying out filter pressing to obtain a filter pressing block C and a filter pressingsolution C; C, adding silicon dioxide, calcium oxide, aluminum oxide and iron oxide into the filter pressing block B, drying, pre-decomposing, and calcining to obtain cement clinker; D, slurrying thefilter pressing block C, leaching, adjusting the pH to 6.0-6.4, removing impurities, standing, and carrying out filter pressing to obtain a filter pressing block D and a filter pressing solution D, adding ammonia water into the filter pressing solution D to adjust the pH to 8.8-9, and continuously adding an ammonia water solution to adjust the pH to 11.4-11.8. The method realizes recycling of resources.

Description

technical field [0001] The invention belongs to the technical field of electrolytic production and recovery of manganese by a solution electrolysis method, and specifically relates to a method for jointly producing cement clinker and ammonia water by electrolyzing metal manganese waste slag and gypsum. Background technique [0002] At present, the electrolytic manganese metal industry mainly adopts manganese carbonate ore dilute sulfuric acid leaching method or manganese oxide roasting dilute sulfuric acid leaching method to obtain manganese metal flakes by electrolysis. During the production process, a large amount of harmful substances such as heavy metals and high concentrations of carbon dioxide, ammonia, and chlorine will be produced. and other impurity gases. The commonly used treatment method is to build a large leak-proof slag silo, and overflow water treatment facilities are installed in front of the slag dam to treat overflow sewage, and the slag dam contains waste...

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Problems solved by technology

Through the above technical means, most of the water-soluble manganese and waste residues are recovered, and these water-soluble manganese and waste residues become cement clinker, and sulfuric acid is produced at the same time, but the content of manganese element contained in the obtained cement clinker is relatively high, and Manganese has adverse effects on the combustibility of raw meal and the compressive strength of cement clinker ("Application of manganese slag in the calcination of cement clinker", Zou Li, Sichuan Cement, 2007, July, 33) and the obtained cement clinker The magnesium content in the medium exceeds the standard; the slag washing water is recycled, and the water balance will be affected after the slag washing is too many times; the sulfidic slag produced in the process of sulfur removal and air iron removal in the production process of electrolytic manganese will take away 3.16%-10.5% manganese, resulting in a waste of resources; at the same time, this method can only deal with water-soluble manganese, can not deal with acid-soluble manganese and acid-insoluble manganese; in the process of operation, some manganese exists in the waste residue, which has not been fully recycled

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