Study on Ramming Technology of the Casting Mold for Ferrovanadium Smelting

Ramming characteristics of the casting mold,which is suitable for ferrovanadium smelting by tilting furnace,was studied.The effects of magnesia particle size distribution,brine ratio,ramming time,corundum slag ratio and baking program on the amount of seeping ferrovanadium in casting mold and its vanadium content were investigated.The results indicate that vanadium loss in casting process decreases with increase in magnesia particle size and ramming time while increases with the increasing corundum slag ratio.Meanwhile,vanadium loss decreases at first and increases subsequently with increase in brine ratio.The baking program has nearly no effect on vanadium loss in the experiments.In this study,the vanadium loss is calculated to be 3.16 kg when the weight of seeping alloy is 131 kg with 2.43% of vanadium content at the optimal experimental conditions for 8:1 of magnesia particle size ratio(3~8 mm/0~3 mm),2.5:1of brine ratio,60 min of ramming time,and 0~500℃ for 2.0 h,500℃ for 2.0 h,500~800℃ for 2.0 h,800℃ for 4.0 h of baking program.