| 摘要 |
[TASK] It is to propose a method of operating an oxygen blast furnace which is capable of lowering the temperature in the combustion zone at the tuyere tip while decreasing an emission amount of CO 2 as compared to the conventional ones. [SOLUTION] In a method of operating an oxygen blast furnace by blowing at least pure oxygen from tuyeres to generate blast furnace gas containing a small amount of nitrogen from a furnace top, a temperature of a combustion zone at a tuyere tip is lowered by blowing a tuyere-blowing gas, in which the sum of volume fractions of hydrocarbon and hydrogen is not less than 50%, together with the pure oxygen from the tuyeres. |
