Abstract: A series of study was took out with charging coke and tuyere coke,such as thermal effect active,coal solution loss,mineral(TiO₂,Alkali metal) and slag-iron attack,so the solution loss of coke in BF with high Ti type vanadic titanomagnetite was understood.The results show that the CRI increases and the thermal stength of coke decreases with the alkali load of burden rising.The starting reaction temperature average of coke is 862℃ and the violent reaction temperature average is 1 266℃ in BF with smelting vanadic titanomagnetite.The gasificating reaction of the coke is the main solution loss reaction,and the TiO₂ in slag-iron protects the coke against solution loss.