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科姆纳尔钢铁公司在1983～1984年对11和17号热风炉进行了大修,即11号热风炉更换内衬,17号热风炉更换格子砖支柱。在11号热风炉上,为实现机械化拆除内衬和清理废砖,采用З—5015—A型短臂挖掘机进行拆除工作。在热风炉下部燃烧室冷风管区域内开一个孔,供运出废砖用:在栈桥上安设一条宽1000mm的皮带运输机,用来把碎砖装入铁路车皮。第一阶段,先把拱顶的内衬崩落,并将大墙拆除到标高36000处,然后在炉壳顶部向运渣线侧割开一个4500×
In the period 1983-1984, Comnar Steel overhauls the hot blast stoves 11 and 17, replacing the hot blast stoves with the No. 11 hot blast stove and the replacement of the checker bricks with the No. 17 hot blast stove. On the 11th stove, in order to achieve mechanized removal of lining and clean-up of waste bricks, the ³-5015-A short-arm excavator was used for demolition work. A hole was drilled in the area of the cold air duct in the lower part of the hot blast furnace for removal of waste bricks. A belt conveyor with a width of 1000 mm was installed on the trestle to load crushed bricks into the railway wagon. The first stage, the first vault of the roof collapse, and the demolition of the wall to the elevation of 36,000, and then the top of the furnace slag line to cut a 4500 ×