Stepped furnace bottom type electric furnace and method for decreasing residual slag in furnace through same

The invention discloses a stepped furnace bottom type electric furnace and a method for decreasing residual slag in the furnace through the same, and belongs to the technical field of steel and iron smelting. In order to solve the problems that at present, in the process of handling high-titanium blast furnace slag through the high-temperature carbonization technology, the slag discharging time islong, and the amount of residual slag in the furnace is large, the stepped furnace bottom type electric furnace is provided, the electric furnace adopts a 2-5-layer stepped furnace bottom, the furnace bottom is made of refractory bricks, the height difference between every two adjacent steps is 50-200 mm, and the width of the steps is 300-2500 mm; and through smelting power transmission system adjustment, the purposes that the slag discharging time is shortened, the amount of the residual slag in the electric furnace in the process of smelting the furnace slag through the electric furnace isdecreased, and electricity