Method for advancedly removing molybdenum from manganese sulfate solution

Abstract

The invention discloses a method for advancedly removing molybdenum from a manganese sulfate solution. The method for advancedly removing the molybdenum from the manganese sulfate solution is carriedout according to the following steps of after a pH value of the manganese sulfate solution is adjusted, adding a molybdenum removal agent into the solution, and conducting stirring and filtering to obtain filter liquor, namely a purified manganese sulfate solution; and therefore, the requirement of purifying the manganese sulfate solution can be met, and in the molybdenum removal process, the solution does not need to be heated. The method for advancedly removing the molybdenum from the manganese sulfate solution has the advantages that the procedures are simple, the cost is low, the efficiency is high, no pollution is generated, the defects of existing methods are overcome, and the requirements of the molybdenum content of manganese sulfate for producing a high-purity manganese-bearing material are met.

Description

technical field [0001] The invention relates to a method for deeply removing molybdenum from a manganese sulfate solution, which belongs to the field of deep purification of hydrometallurgy and chemical solution. Background technique [0002] Manganese sulfate is a basic manganese salt, and it is a raw material for the preparation of electrolytic metal manganese, electrolytic manganese dioxide, high-purity manganese sulfate, nickel-cobalt-manganese ternary materials, lithium manganate, etc. During the preparation of manganese sulfate solution, the molybdenum in the ore enters the solution along with the acid leaching process and becomes an impurity, affecting the quality of subsequent products. [0003] The current molybdenum removal methods include new ecological manganese dioxide molybdenum removal method, sulfide method, permanganate method, adsorption method, co-precipitation method, extraction method, etc. Removing molybdenum by using nascent manganese dioxide is a new...

AI Technical Summary

Problems solved by technology

For sulfide precipitation, the pH value of manganese sulfate solution needs to be adjusted to strong acidity, and sulfide is added to remove molybdenum in the form of molybdenum trioxide precipitation. The cost of impurity removal is high, the removal efficiency is limited, the loss of manganese is large, and H 2 S and other harmful gases

The permanganate method has a high removal efficiency, but it will lead to an increase in the K and Na of the manganese sulfate solution, which has a great impact on the quality of the battery product, and the permanganate has strong oxidative properties, and the safety requirements for transportation, storage, and use are high.

Adsorption method and co-precipitation method have a large amount of reaction slag, high cost, and poor removal efficiency

The filter residues produced by the above methods are difficult to reuse, and cause a certain loss of manganese, and may cause secondary pollution, increasing the cost of environmental protection treatment

Although the extraction method has high removal efficiency, the procedure is complicated, the time for impurity removal is long, and the cost and environmental protection cost are relatively high