The issue of leaching rate of electrolytic manganese in winter
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During winter when the outside temperature is low, the leaching rate of manganese ore when dissolved using sulfuric acid is low. I would like to ask the experts on this forum: what approaches can be taken to improve the leaching rate? Thank you
Consider raising the temperature appropriately, as the main reason for your low leaching rate is the low temperature.
Methods include: 1. Using steam heating for leaching； 2. Use roasted manganese oxide to neutralize and adjust pH ； 3. Use high-grade manganese ore to neutralize and adjust pH ； 4. Use compressed air, water washing, and other methods to reduce the water-soluble manganese content in the slag ；
Leaching is a kinetic process; you’ll see that once you look at it. Raising the temperature helps to increase the leaching rate for a certain period of time, but the cost is too high; which electrolytic manganese plants are still using heating these days? In fact, appropriately extending the leaching time, appropriately increasing the leaching acidity (while maintaining the balance of sulfuric acid), appropriately improving the fineness of the ore powder, increasing the stirring speed, and changing the feeding routine can all help to improve the leaching rate. If necessary, insulation measures can even be applied to the leaching tanks (however, since manganese electrolysis plants are all located in the south, this seems to be rarely or even never done). However, to put it nicely, electrolytic manganese is an industry on the decline; to put it bluntly, it’s actually a waste-intensive industry that is highly polluting and consumes a lot of energy, relying entirely on its resource advantages as its characteristic. Therefore, it is pointless to increase the leaching rate; the useful approach is to find cheaper ores.
Thank you, I’ve learned something! 1. Electrolytic manganese plants rarely have boilers; if they are used, the costs increase. If sulfuric acid is produced concurrently to utilize the waste heat steam, this option can be considered. 】 2. Calcined manganese dioxide is not available in electrolytic manganese enterprises! 3. Nowadays, too much manganese ore is being mined, and its grade has dropped significantly; it’s not very promising at all! 4. This isn’t very clear; could you explain it in more detail?
1. Electrolytic manganese plants rarely have boilers; if they are used, the costs increase. If sulfuric acid is produced concurrently to utilize the waste heat steam, this option can be considered. OK 2. Calcined manganese dioxide is not available in electrolytic manganese enterprises! In fact, many electrolytic manganese manufacturers are still using calcined manganese dioxide today. 3. Nowadays, too much manganese ore is being mined, and its grade has dropped significantly; it’s not very promising at all! OK, 4. This point isn’t very clear; could you explain it in more detail? Hehe, it’s the process of dealing with the moisture content in the filter press.
1. Electrolytic manganese plants rarely have boilers; if they are used, the costs increase. If sulfuric acid is produced concurrently to utilize the waste heat steam, this option can be considered. 】 2. Calcined manganese dioxide is not available in electrolytic manganese enterprises! I have already achieved both of these