NEW METHOD AND SYSTEM FOR COLD CONVEYING FLUIDIZED BED SMELTING OF REDUCING GAS PREPARED BY USING MEDIUM/LOW-RANK COAL GASIFICATION

摘要

An ore powder reduction method and a system thereof. The ore powder reduction method comprises: reacting coal, vapor and oxygen in a gasification reactor (100) to obtain a reducing gas comprising carbon monoxide and hydrogen; reacting the reducing gas and ore powder in a fluidized bed reduction reactor (200) to obtain a reduction product and a reduction exhaust; and introducing the reduction exhaust into the fluidized bed reduction reactor (200). The introducing the reduction exhaust into the fluidized bed reduction reactor (200) also comprises: mixing the reduction exhaust with the reducing gas in advance and then performing desulfurization and decarburization processing to obtain a purified gas mixture; and introducing the purified gas mixture into the fluidized bed reduction reactor (200). By using the method, ore powder can be effectively reduced, thereby saving the cost and obviously improving the reduction efficiency of the ore powder.