Electric arc furnace steelmaking is with low heat value gas efflux apparatus of oxygen supply tied in a bundle

The utility model belongs to electric arc furnace steelmaking field, in particular to electric arc furnace steelmaking is with low heat value gas efflux apparatus of oxygen supply tied in a bundle is applicable to the oxygen suppliment of 30~300t electric arc furnace steelmaking process. The utility model discloses with nitrogen gas or air and natural gas proportional mixing, form " nitrogen gas the natural gas " or " air the natural gas " the low heat value air mixture utilizes this low heat value air mixture to jet as the circumferential weld gas of oxygen rifle tied in a bundle. The utility model discloses a control system, gas supply valve group and static mixer can realize the low heat value air mixture jetting mode of different proportions, satisfy the different technology requirements of smelting. Simultaneously, the low heat value air mixture jetting mode developments switching on line of different proportions. The utility model discloses can be when guaranteeing electric arc furnace oxygen rifle oxyg