| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for enriching oxygen in a heat insulating furnace, which is used in a sintering machine having the heat insulating furnace and in which gaseous fuel can be supplied and simultaneously oxygen can be enriched without removing the heat insulating furnace, and to provide the heat insulating furnace.SOLUTION: The method for enriching oxygen in the heat insulating furnace of the sintering machine comprises a step of supplying high-temperature gas containing gaseous fuel diluted to the concentration, which is equal to or lower than the combustion lower limit concentration, to the inside of a sintering raw material charging layer which is installed on the downstream of an ignition furnace. An oxygen supply pipeline for supplying oxygen to the high-temperature gas is connected to the upstream side of a connection position of a high-temperature gas supply pipeline used for supplying the high-temperature gas to the heat insulating furnace, with the heat insulating furnace so that the high-temperature gas having the oxygen concentration exceeding 21 vol% can be supplied to the inside of the heat insulating furnace.SELECTED DRAWING: Figure 15 |
