Smelting system of manganese-silicon alloy and smelting process of manganese-silicon alloy

The invention discloses a smelting system of a manganese-silicon alloy. The smelting system of the manganese-silicon alloy comprises a first feeding device, a second feeding device, a submerged arc furnace, a waste heat tower, a sub cylinder, a steam turbine set, a condenser, a deaerator, a chimney, a cooling tower, an air cooler, a cyclone separator and a bag-type dust collector. The first feeding device and the second feeding device communicate with the submerged arc furnace, and a smoke outlet opening of the submerged arc furnace, the waste heat tower and the chimney communicate with each other in sequence. A superheater, an evaporator and an economizer are arranged in sequence in the direction from an inlet to an outlet in the waste heat tower, the superheater, the evaporator and the economizer all communicate with a steam drum, the superheater, the sub cylinder, the steam turbine unit, the condenser, the deaerator and the economizer communicate with each other in sequence, and a cooling water circulation