A device for hot melting sylvite is introduced. The device consists of barrel jacket heating muff, heating coll by steam, pusher and hinge stirrer, centre guide cylinder, reduction gears, frequency modulation motor, having characteristic of simple structure, low energy consumption and low cost for manufacture. Potash containing high sodium and low potassium(K 5% - 10% ) is processed by the device, as a result, potassium c...