Method and system for decomposing and activating manganese carbonate at low temperature

Abstract

The invention discloses a method and system for decomposing and activating manganese carbonate at the low temperature, and is used for solving the problems of high cost and waste of coal resources due to the fact that roasting powder required to be added in a weak acid working section is prepared from manganese dioxide in an electrolytic manganese hydrometallurgy technology in the prior art. The method comprises the following steps that manganese carbonate ore is crushed until the particle size is smaller than 10 mm, blending is performed according to the proportions of 100 parts of the manganese carbonate ore and 3-5 parts of finely-washed coal, the blended mixture is fed into an inner cavity of a reduction tank, the mixture is roasted at the low temperature in the reduction tank across the inner cavity, the roasting temperature is controlled to be 850-940 DEG C, and the roasting time ranges from 18 h to 24 h; manganese monoxide is generated after roasting is completed, and the manganese grade is 6%-8% higher than that of the manganese carbonate ore. The method has the beneficial effects that the ore grade is improved by 6%-8%, and the treated ore can be directly used for an electrolytic manganese metal chemical combination workshop, so that the manganese ore resource can be effectively utilized, the electrolytic manganese metal chemical combination working section technology can be optimized, the liquid preparation time can be shortened, and the human and material resource cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of special equipment for metallurgy, in particular to a method and system for low-temperature decomposition and activation of manganese carbonate. Background technique [0002] In the electrolytic manganese hydrometallurgical process, in order to reduce production costs and obtain high-quality neutral liquid, roasting powder needs to be added in the weak acid production section of the electrolytic manganese compound liquid to react with the remaining acid in the slurry, and the remaining acid After the concentration is lower than 0.74g / L, add additives such as ammonia water for acid collection and neutralization. Among them, roasting powder is mainly obtained by purchasing South African manganese dioxide ore through high-temperature reduction. Manganese smelting enterprises need to spend a lot of money every year to purchase manganese dioxide ore. The international price of manganese dioxide ore is higher th...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention provides a method and system for decomposing and activating manganese carbonate at low temperature, which is used to solve the problem that in the electrolytic manganese hydrometallurgy process in the prior art, the roasting powder that needs to be added in the weak acid section is made of manganese dioxide, which is costly and wasteful. The problem of coal resources

Images