Comprehensive recovery and utilization treatment system of manganese tetraoxide production wastewater

Abstract

The invention discloses a comprehensive recycling treating system for wastewater in manganous-manganic oxide production. The system comprises a sewage manganese settlement treating system and a manganese settlement supernate purifying system; the sewage manganese settlement treating system comprises a settlement treating tank; an alkaline liquid adding tank and a flocculant adding tank are connected to the outside of the settlement treating tank; a ventilating device is arranged in the settlement treating tank; a settlement slurry discharging opening is formed in the bottom part of the settlement treating tank and communicated with a manganous-manganic oxide production system; a supernate outlet of the settlement treating tank is communicated with the manganese settlement supernate purifying system; the manganese settlement supernate purifying system comprises a filtering system, a sewage reverse osmosis (RO) membrane treating device and an RO treating system which are sequentially communicated; a pure water outlet of the RO treating system is communicated to the manganous-manganic oxide production system. The comprehensive recycling treating system has the advantages of being energy saving, environmentally friendly, simple in structure, and low in cost, and fully recycling manganese resources and water resources.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and chemical engineering, and in particular relates to a comprehensive treatment system for manganese tetraoxide production wastewater. Background technique [0002] With the rapid rise of global electromechanical, electronic, information, communication, household appliances, computer and other industries, its products are developing rapidly in the direction of high performance and miniaturization, and the cycle of product replacement is getting shorter and shorter. Higher requirements are put forward for the performance of soft ferrite, the basic material in the electronics and electromechanical industries. Therefore, manganese tetraoxide has gradually replaced manganese carbonate as the basic raw material of soft ferrite. The United States, Japan, Belgium, South Africa and other countries successively realized the industrial production of manganese tetraoxide in the 1980s. The research...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is, aiming at problems such as complex treatment process, high operating cost, insufficient recycling of manganese resources, and secondary pollution caused by a large amount of calcium carbide slag, which exist in the current manganese tetraoxide industrial wastewater treatment process, especially It is a defect that the treated wastewater cannot be recycled, and provides a resource-saving, environmentally friendly, simple structure, low cost, and a comprehensive recovery and utilization treatment system for manganese tetraoxide production wastewater that can fully recycle manganese resources and water resources.

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