Method utilizing titanium white waste acid to prepare electrolytic manganese metal

Abstract

The invention relates to a method utilizing titanium white waste acid to prepare electrolytic manganese metal, belonging to the field of metallurgical chemistry. The technical problem that the invention aims at solving is to provide the method with lower production cost for utilizing the titanium white waste acid to prepare the electrolytic manganese metal. The steps of the method are as follows: a. leaching: manganese ore containing manganese dioxide, pyrite ore and the titanium white waste acid are reacted in a reaction container after being heated to the temperature of 90 to 100 DEG C, water in proper quantity is added to make up for the evaporated quantity of water in the reaction process, CaCO3 is added when the pH value of solution is within 1.5 to 2 so as to neutralize the pH value of the solution to 4.8 to 5.2, and then ammonia water is added to adjust the pH value to 6.2 to 6.4; b. filtering: a reaction product of step a is filtered to obtain filtering solution and filtering residues; c. purifying and removing of heavy metal: sulfide salt is added to the filtering solution obtained in step b so as to remove the heavy metal, and the filtering solution is simply filtered and then filtered in a fine manner after being stewed for 24 to 48 hours so as to obtain the filtering solution that meets the electrolytic requirement; d. electrolyzing: the manganese metal and waste electrolytic solution namely anode solution containing sulfuric acid are obtained.

Description

technical field [0001] The invention relates to a method for preparing electrolytic metal manganese from titanium white waste acid, belonging to the field of metallurgical chemistry. Background technique [0002] Titanium dioxide waste acid is the waste produced by the production of titanium dioxide by sulfuric acid method. For every ton of titanium dioxide produced, 8-10 tons of waste acid containing 20% ​​sulfuric acid and 15-25% ferrous sulfate will be discharged. These waste acids need to be neutralized before they can be discharged, which will lead to great pressure on the environmental protection of titanium dioxide manufacturers and a substantial increase in production costs. On the other hand, a large amount of sulfuric acid is required to produce electrolytic manganese by the two-mine method. If the two can be combined, not only the environmental protection problem is solved, but also the economic benefits are considerable. [0003] At present, there are related re...

AI Technical Summary

Problems solved by technology

Although the production technology of this method is relatively mature, a large amount of anolyte is added during the leaching reaction, the liquid-solid ratio is high (the liquid-solid ratio is more than 6:1), and the energy consumption is high. In addition, a large amount of ammonia water and Ammonium bicarbonate needs to be further concentrated and distilled ammonium, which further increases energy consumption and leads to high cost of the whole process

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