Method for melting reduction iron making

The invention relates to a method for melting reduction iron making, in particular to a method for direct melting reduction iron making in a reaction furnace, which belongs to the field of metallurgical melting. The method comprises the following steps: a spray gun is inserted into the furnace from the top of the furnace and the spray gun nozzle is suspended at the upper part of a slag melting layer; the position of the spray gun can be adjusted up and down according to specific smelting periods; smelted fuel, air and oxygenized oxygen are sprayed into a melting pool through the spray gun; charging materials such as iron ore powder, fusing agent and the like are added from a furnace-top feed inlet; nitrogen is directly brown into the melting pool from the bottom of the furnace; the melting pool is in stirring state by the combined action of top oxygen blowing and bottom nitrogen blowing; and flue gas produced by melting passes through a waste heat boiler for heat exchange and is then sent to subsequent workin