Method for preparing manganese sulfate solution by using sulphur dioxide gas leach manganese dioxide ore
A manganese sulfate solution, sulfur dioxide technology, applied in manganese sulfate and other directions, can solve the problems of affecting the absorption rate of sulfur dioxide, large volume flow, waste of sulfur resources, etc., and achieve continuous, stable and high-efficiency production, low grade requirements, and high utilization rate Effect
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[0051] In this embodiment, a device including two-stage absorption and leaching reaction chambers directly connected by pipes arranged in series up and down is used as the reactor 5. Sulfur dioxide gas comes from sulfur roasting generation system 1, and the amount of sulfur dioxide gas generated is 6000Nm 3 / h, after the temperature is cooled to about 80°C through heat exchange, it is sent to the absorption reactor 5 by the blower 3 through the pipe 2 at a pressure of 8000 Pa. Pyrolusite with a particle size of less than 100 meshes and water are prepared into a slurry with a liquid-to-solid ratio (mass ratio) of 2:1 in a slurry tank 6 equipped with a stirrer, and the slurry is sent to the absorption reactor 5 via a slurry pipeline 7 by a pump. The oxygen is fed into the absorption reactor 5 by the blower 4. In the reactor, sulfur dioxide gas and oxygen are continuously fed into the second-stage absorption and leaching reaction chamber of the reactor, and enter i...
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