| 摘要 |
PURPOSE:To stabilize furnace conditions and to produce hot metal of low Si level by detecting the length of zone held at low temp. continuously by providing pyrometer movably vertically in the furnace and detecting simultaneouly the top surface level of the fuse-sticking zone. CONSTITUTION:A vertical sonde 6 provided with a pyrometer 5 in the inside of the bottom end of a vertical pipe 4 is installed movably in the vetrical direction in the inside of the furnace wall along the radial direction of the furnace. The pyrometer 5 is located at 7-9m below the stock line 7, and the length of the zone held at low temp. is continuously detected basing on detected gas temp. When the feed condition is changed, the sonde 6 is naturally descended together with the feed in the furnace. The level of the top surface of the fuse-sticking zone on the furnace wall is detected basing on the detected gas temp. during descending. After the detection, the sonde 6 is pulled up to restore the pyrometer 5, and the length of the above described zone held at low temp. is detected continuously. |
