1 results about "Coke rate" patented technology

A method for operating a smelting furnace installation, in particular a blast furnace installation, includes the following steps:feeding coke, iron oxide containing material and if required fluxing agents to the top of the smelting furnace;injecting a first reducing gas containing hydrogen at a tuyere level of the smelting furnace at a temperature above 1600° C.;injecting oxygen at the tuyere level of the smelting furnace; andinjecting a second reducing gas at a lower shaft level of the smelting furnace. Coke is fed at a lump coke rate below 220 kg / t HM and wherein the rate of oxygen injected at the tuyere level is below 120 Nm3 / t HM.