1985 Volume 71 Issue 2 Pages 189-196
No. 2 blast furnace in Kobe Works was blown in on February 4, 1981 and because of the economic conditions it was blown out on April 22, 1983. Since its working period was very short (about 2.2 years), it was banked with the expectation of blowing in after several years.
The methods employed were :
(1) to lower the stock line down to just above the level of the SiC brick lining (lower shaft) with the burden being replaced by coke,
(2) to cool the furnace by N2 gas,
(3) to preserve the furnace brick under N2 atmosphere.
Two samples of SiC brick at lower shaft part were collected just after and at 8 months after blowing out, and then they were investigated. It was found that there was no impairment in the SiC brick during this 8-month period.
Hot stoves were cooled by the natural cooling method with keeping airtight and their cooling periods were about 3 months. After cooling them, the observations inside them were done and it was confirmed that the damage of the brick was very little, so the reoperation of them would be of no trouble.