2016-3-27Exhibit 7 illustrates the electrolytic production of manganese dioxide, which is similar t o the electrolytic production of manganese metal. Manganese ore and coke are reacted in kilns at 600C. The mi xture is cooled and leached with a solution containing 50 grams per liter of manganese sulfate and 67 grams per liter of sulf uric acid at 90C.
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