Premelted slag is a necessary flux addition for electroslag remelting process to produce high quality and superalloy materials. The weight gain rate of fresh and premelted slag in atmosphere with 90% relative humidity

the influence of lime content in fresh slag on moisture absorption performance of slag and the effect of fresh slag and premelted slag on hydrogen content in steel during electroslag remelting (ESR) process have been tested and studied. Application results show that as the premehed slag manufactured by electro-fusion method is used in ESR process

the electric power consumption per ton steel decreases by 100 -200 kWh

the yield of products increases by more than 3%

the qualified rate of ESR ingot by nondestructive test obviously increases

the hydrogen content in steel greatly lowers and the surface quality of ESR ingot is improved.