upper row of tuyeres(Hot blast is blown into the shaft furnace through the lower row of tuyeres with basic oxygen furnace dust injected into it through the upper row of tuyeres. 热风通过下排风口鼓人竖炉内,氧气顶吹转炉炉尘通过上排风口喷人竖炉内。)
lower row of tuyeres(Hot blast is blown into the shaft furnace through the lower row of tuyeres with basic oxygen furnace dust injected into it through the upper row of tuyeres. 热风通过下排风口鼓人竖炉内,氧气顶吹转炉炉尘通过上排风口喷人竖炉内。)