Write chemical equations for the reactions involved in the manufacture

Write chemical equations for the reactions involved in the manufacture of potassium permanganate from pyrolusite ore.

Preparation of potassium permanganate: Potassium permanganate is prepared by the fusion of MnO2 (pyrolusite) with potassium hydroxide and an oxidizing agent like KNO3 to form potassium manganate (green mass), which disproportionate in a neutral or acidic solution to form permanganate.
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