Modified manganese slag compound fertilizer production system

Abstract

The invention discloses a modified manganese slag compound fertilizer production system. The production system comprises a manganese slag prefabrication system and a compound fertilizer production system. The manganese slag prefabrication system comprises a combustion furnace induced draught fan (I), a combustion furnace (I), a manganese slag drying machine, an acidification modifier, and a neutralization reactor. The compound fertilizer production system comprises a combustion furnace induced draught fan (II), a combustion furnace (II), a weighing and blending system, a mixing machine, a raw material grinding machine, a granulating machine, a compound fertilizer drying machine, a compound fertilizer cooling machine, a cool air induced draught fan, a screening machine, a coating machine, and a metering and packaging machine. Strong oxidative substance (potassium permanganate) and alkaline substance (KOH) in manganese slag are decomposed at a high temperature and neutralized by phosphoric acid so as to modify manganese slag to meet the compound fertilizer production requirements; the modified manganese slag is taken as the raw material, then various basic fertilizers (nitrogen, phosphorus, potassium, etc.) are added to produce the compound fertilizer; the problem of waste discharge is solved, the resources are fully utilized, and the wastes are converted into valuable resources.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of waste discharges, in particular to a modified manganese slag compound fertilizer production system. Background technique [0002] Potassium permanganate production will produce a large amount of waste discharge—manganese slag. Although manganese slag is industrial waste, there is no grass in the waste dump, and the leachate is deep purple, which directly and seriously pollutes the environment. However, the composition and structure of manganese slag are all inorganic minerals. According to the test analysis, manganese slag contains a large number of nutrients directly available to plants, potassium (K 2 O), phosphorus (P 2 o 5 ) dry basis content as high as 10 to 11%. In addition to the potassium needed for plant growth, manganese slag also contains potassium permanganate, a strong oxidizing substance that is harmful to the growth of crops. At the same time, because it cont...

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Problems solved by technology

[0002] Potassium permanganate production will produce a large amount of waste discharge—manganese slag. Although manganese slag is industrial waste, there is no grass in the waste dump, and the leachate is dark purple, which directly pollutes the environment seriously.

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