Method for operating a smelting furnace installation
AssigneePaul Wurth S.A.
InventorsKlaus Peter KINZEL, Fernand DIDELON, Mehdi BANIASADI, Evangelos DELIKONSTANTIS, Jihong JI
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Abstract
A method for operating a smelting furnace installation, in particular a blast furnace installation, the method including 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.; and injecting a second reducing gas at a lower shaft level of the smelting furnace. The coke is fed at a lump coke rate below 220 kg/t HM, and the density of the first reducing gas is below 0.80 kg/Nm3.
Claims37
A method for operating a smelting furnace installation, in particular a blast furnace installation, the method including the following steps:
- feeding coke, iron oxide containing and other iron bearing 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, the first reducing gas being heated at a temperature above 1600° C., and
- injecting a second reducing gas at a lower shaft level of the smelting furnace within the gas-solid reduction zone of ferrous oxide above the cohesive zone,
- wherein coke is fed at a lump coke rate below 220 kg/t HM, and wherein the density of the first reducing gas is below 0.80 kg/Nm3.
A smelting furnace installation, in particular a blast furnace installation, comprising
- a charging apparatus configured for feeding coke, iron oxide containing and other iron bearing material and if required fluxing agents to the top of the smelting furnace;
- a first injector arrangement positioned at a tuyere level of the smelting furnace and configured for injecting a first reducing gas containing hydrogen at said tuyere level of the smelting furnace at a temperature above 1600° C.;
- and
- a second injector arrangement positioned at a shaft level of the smelting furnace and configured for injecting a second reducing gas at a lower shaft level of the smelting furnace within the gas-solid reduction zone of ferrous oxide above the cohesive zone,
- wherein the charging apparatus is configured for feeding coke at a lump coke rate below 220 kg/t HM, wherein the first injector arrangement is configured for injecting the first reducing gas at a density below 0.80 kg/Nm3, at the tuyere level and wherein said first injector arrangement comprises an electric heating device configured for heating the first reducing gas at said temperature above 1600° C.
Dependencies are inferred from the claim text.