Comprehensive recovery and utilization method of manganese tetraoxide production wastewater

Abstract

The invention discloses a comprehensive recycling method for trimanganese tetraoxide industrial wastewater. The comprehensive recycling method comprises the following steps: firstly collecting and standing the trimanganese tetraoxide industrial wastewater, wherein the trimanganese tetraoxide particles are suspended in the precipitated wastewater; adding alkali liquor and a flocculating agent into a supernatant of the wastewater; monitoring the situation that the pH value is lower than 11 to adjust the adding speed of the alkali liquor; meanwhile feeding air or oxygen as an oxidizing agent, and performing a primary manganese deposition; purifying the supernatant after the primary manganese deposition; performing solid-liquid separation to the residual precipitated slurry to obtain trimanganese tetraoxide precipitate; returning the trimanganese tetraoxide precipitate to a trimanganese tetraoxide production system. The method disclosed by the invention has the advantages of being resource-saving, environment-friendly, simple in process, low in cost and the like, and can be used for sufficiently recycling the manganese resource and the water resource.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy and chemical environmental protection, and in particular relates to a comprehensive treatment process 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....

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Problems solved by technology

[0004] 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 the defect that treated wastewater cannot be recycled, and provides a comprehensive recycling method for manganese tetraoxide production wastewater that is resource-saving, environmentally friendly, simple in process, low in cost, and can fully recycle manganese resources and water resources.

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