Method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash

Abstract

The invention discloses a method for producing potassium magnesium sulfate fertilizer and manganese sulfate from manganese-containing fly ash and belongs to the field of resource recycling and chemical industry. The method comprises ball milling, soaking in fertilizer, solid-liquid separation (1), residue washing, soaking in manganese, solid-liquid separation (2), magnesium potassium sulfate solution preparation and manganese sulfate preparation. The method realizes recovery and use of beneficial components in manganese-containing fly ash and solves the problem of environmental pollution caused by the manganese-containing fly ash stacking process. The produced potassium magnesium sulfate fertilizer and manganese sulfate products provide economic benefits for enterprises. The method realizes recycling of manganese-containing fly ash, is simple and practical, is feasible, is especially suitable for the recovery of potassium and has substantial the economic value.

Description

technical field [0001] The invention belongs to the field of resource recycling and chemical production, and in particular relates to a method for producing magnesium sulfate fertilizer and manganese sulfate by using manganese-containing dedusting ash. Background technique [0002] Manganese-containing dedusting ash is the dedusting ash obtained by bag-type dust collection of blast furnace flue gas produced by manganese separation by fire method. The main components are manganese, potassium oxide, and magnesium, and it also contains heavy metal components such as Pb, As, Cd, Ni, and Co. There are a large number of smelting blast furnaces in Shanxi, Inner Mongolia, and the surrounding areas of North China, which produce hundreds of thousands of tons of smelting manganese-containing dust ash every year, and the stockpiling over the years can reach several million tons. At present, most of these manganese-containing dedusting ash are simply piled up, resulting in a great waste...

AI Technical Summary

Problems solved by technology

At present, most of these manganese-containing dedusting ash are simply piled up, resulting in a great waste of resources. When the air is dry, the dust will be blown by the wind, causing serious pollution to the environment.

[0003] Although some enterprises have adopted sintering for manganese-containing dust removal ash, and then return it to the furnace for use, but this treatment method consumes too little (the addition ratio is small), and cannot make full use of the beneficial ingredients in it, and cannot properly handle the manganese-containing dust. Dust removal still causes secondary pollution to the environment

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