3~#炉中修后于1980年12月7日开炉投产,至今连续作业已达7年之久,各部砖衬耗损严重,炉腹、风口、渣口区域的炭砖被浸蚀尤为严重,铁口附近炭砖尚存400～600mm;炉腹冷却壁损坏达80％以上,冷却板损坏高达87％,整个炉体靠强化冷却和炉壳喷水冷却以维护高炉生产。1986年上半年发生铁口附近泄漏炉气的严重情况,虽经拆卸冷却壁进行捣料和电炮打泥处理大有好转,但1987 3 ~ # furnace after repair in the December 7, 1980 put into operation, has been operating continuously for seven years, the Department of brick wear serious, fire belly, tuyere, slag mouth area is particularly serious erosion of carbon bricks , Taphole near the taphole surviving 400 ~ 600mm; bosh stab wall damage more than 80%, cooling plate damage up to 87%, the entire furnace by enhanced cooling and furnace shell water cooling to maintain blast furnace production. In the first half of 1986, there was a serious situation of gas leakage near the iron mouth. Although the dismantlement of the stave and the demolition of the stowage wall had greatly improved, 1987