Synergistic curing treatment method of electrolytic manganese residues and phosphogypsum waste residues

Abstract

The invention provides a synergistic curing treatment method of electrolytic manganese residues and phosphogypsum waste residues. The synergistic curing treatment method comprises the following stepsthat the uniformly mixing the electrolytic manganese residues and phosphogypsum is carried out, a certain amount of water and a soft soil curing agent are sequentially added, uniformly stirring is carried out, a mixture of the electrolytic manganese residues and phosphogypsum after being added with the soft soil curing agent is placed for a period of time, then reacting is carried out, and curingan obtained test block for a period of time under a certain curing condition is carried out. According to the synergistic curing treatment method of the electrolytic manganese residues and the phosphogypsum waste residues, the addition amount of the soft soil curing agent used when cementing and curing electrolytic manganese is carried out through the method is small, the unconfined compressive strength can be greatly improved, the softening coefficient is obviously enhanced, the effective consolidation resource utilization of the electrolytic manganese residues and the phosphogypsum can be realized, high-consumption resource consumption of roadbase and dam body materials on an electrolytic manganese material can be effectively carried out, the pollution of the electrolytic manganese residues and phosphogypsum to the mine environment can be effectively reduced; and by utilizing the characteristics of high strength of a concretion body in the electrolytic manganese residues curing process and difficult dispersion of phosphogypsum in the phosphogypsum curing process, a green process for treating waste with waste is realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for synergistic solidification of electrolytic manganese slag and phosphogypsum waste slag. Background technique [0002] China is rich in manganese ore resources. At present, more than 200 manganese ore areas have been identified in my country, mainly distributed in Guangxi, Hunan, Guizhou, Liaoning and other places, with a total of about 601 million tons. Electrolytic manganese slag is a solid waste discharged during the production of electrolytic manganese. Because of its complex composition, fine particle size, and a large amount of sulfate and ammonium ions, according to relevant data, the average production of 1t of electrolytic manganese metal requires carbonic acid Manganese ore 8-10t, slag 9-11t. The amount of electrolytic manganese slag discharged in my country is nearly 10 million tons every year, and the accumulated stockpiles over the years...

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is that phosphogypsum is used as the main raw material, and the fluoride, free phosphoric acid, P 2 o 5 , phosphate and other impurities are likely to cause environmental pollution; using Glauber's salt or sodium sulfate as the activator, the activating effect is not ideal, and the production cost is increased; the strength of the autoclaved phosphogypsum bricks only reaches 15-30MPa, which cannot meet the requirements of pavement bricks. actual use needs

The disadvantage of this technical solution is that dihydrate gypsum accounts for a relatively large proportion of raw materials, which is suitable for wall masonry but not pavement masonry, because its compressive strength is not high enough and the water content will change, resulting in a large volume Changes that are used in pavement masonry may cause pavement cracking

It can be seen that autoclaved phosphorus slag bricks are not suitable for pavement masonry

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