Red mud and acidic electrolytic manganese residue synergistic soil treatment and land reclamation method

Abstract

The invention discloses a red mud and acidic electrolytic manganese residue synergistic soil treatment and land reclamation method, and belongs to the technical field of ecological restoration. According to the method, after red mud and electrolytic manganese residues are mixed, stacked, turned and mixed uniformly, and subjected to dry and wet alternate alkali reduction, the mixture is conveyed to a mine pit for landfill and reclamation, a certain amount of compound fertilizer and organic fertilizer are uniformly spread on the surface of a mine reclamation area and mixed uniformly, green manure plants are planted firstly, and then tolerant arbors, shrubs and herbaceous plants are screened and planted. According to the method, the problem that plant growth matrixes are deficient in the mine vegetation recovery process can be effectively solved in a targeted mode, nutrient elements including organic matter, ammonium sulfate, ammonia nitrogen and the like in acid electrolytic manganese residues are fully utilized so as to increase fertility, the red mud and the acid electrolytic manganese residues are co-treated to accelerate soil transformation, ecological recovery is accelerated, a huge amount of piled red mud is digested, the overhanging environmental risk is eliminated, the ecological environment is protected, land resources are regenerated as well, and the ecological economic benefits are increased.

Description

technical field [0001] The invention relates to the technical field of ecological restoration, in particular to a method for synergistic soil treatment of red mud and acidic electrolytic manganese slag and land reclamation. Background technique [0002] Red mud is an insoluble industrial waste that is discharged from alumina plants after alkaline treatment of bauxite. In 2011, the output of red mud in my country was about 45 million tons, and the accumulated stock of red mud reached 250 million tons, occupying more than 40,000 mu of land. At present, the comprehensive utilization rate of red mud in my country is only 4%. With the development of the aluminum industry and the reduction of the grade of aluminum ore, the discharge of red mud will increase. Red mud must be reprocessed and utilized in order to turn waste into treasure and reduce pollution. At present, a large amount of red mud is still discharged to the storage yard for storage, and the dam is wet-stored, and th...

AI Technical Summary

Problems solved by technology

However, electrolytic manganese slag is usually rich in soluble manganese (Mn) and ammonia nitrogen (NH3-N). Under rainwater leaching, the slag field will produce a large amount of acidic leachate containing high concentrations of Mn2+ and sulfate, which poses a potential threat to the surrounding environment.

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