Sintering process is essential in the procedure of the iron and steel smelting, sinter, the quality of which has a direct impact on the quality of steel, is a vital raw material for blast furnace.

In this paper, a review has been presented focusing on the development of recycling dust and sludge formed in ironmaking and steelmaking processes with injecting method in recent years.

This paper analyses the energy balance during the electric furnace steelmaking of An-long. We find the fundamental causes and affecting factors of high electricity consumption.