Side-blown smelting device and smelting method

The invention discloses a side-blown smelting device and a smelting method.The side-blown smelting device comprises a furnace body, a smelting area, a reduction area and a settlement area are sequentially arranged in the furnace body in the length direction, and the furnace body comprises a first side wall and a second side wall which directly face each other in the width direction; the first spray gun is arranged on the area, directly facing the smelting area, of the first side wall and/or the second side wall and extends into slag of the smelting area, and the second spray gun is arranged on the area, directly facing the reduction area, of the first side wall and/or the second side wall and extends into slag of the reduction area. According to the side-blown smelting device, fuel and oxygen are mixed with high-temperature melt under the action of the first spray gun and violently react to generate high-grade low-sulfur nickel matte and smelting slag, partial reduction is further achieved under the action of