Method for joint production of cement clinker and ammonia water by electrolytic manganese metal waste slag and gypsum

Abstract

The invention relates to a treatment method for electrolytic manganese metal waste residue, comprising the following steps: A. Grinding raw gypsum or drying gypsum stone; 6.4, iron removal, press filtration, obtain press filter block A and press filter liquid A, press filter press after the press filter block A washes, obtain press filter block B and press filter liquid B; Adjust the pH of press filter liquid A to 11.5-12, press filter , to obtain press filter block C and press filtrate C; C. add silica, calcium oxide, aluminum oxide, iron oxide to press filter block B, dry, pre-decompose, and calcinate to obtain cement clinker; D. press filter block C slurrying, leaching, adjusting the pH to 6.0-6.4, removing impurities, standing still, and press-filtering to obtain the press-filter block D and press-filtrate D, adding ammonia water to the press-filter D to adjust the pH to 8.8-9, and continuing to add ammonia solution to adjust the pH to 11.4‑11.8. The method realizes the recovery and reuse 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...

AI Technical Summary

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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