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高炉一代炉役的最后几年,炉身常常出现过热部位,有的部位甚至炉壳发红或开裂,从而严重影响操作,有时不得不停炉维修。多年来,高炉炉身的维修一直沿用拆除重砌的方法,不仅耐火材料耗量大,而且维修工期长,费用高。为了延长炉身寿命,近几年来国外广泛采用一种灌浆技术。这项技术需要的人力少、工期短。一般可延长炉身寿命1～2年,从而可取得可观的经济效益。对高炉进行灌浆维修,首先要在需要维修的部位钻孔,然后焊上带有密封盖的喷咀。喷咀接上软管,直通到地面的混凝土泵。灌浆可局部进行,也可在整个炉身进
The last few years of blast furnace generation furnace, the furnace often overheating parts, and some parts of the furnace shell red or cracking, thus seriously affecting the operation, and sometimes had to shut down furnace maintenance. Over the years, the maintenance of blast furnace shaft has been used to dismantle the heavy brick method, not only refractory material consumption, and long maintenance period, high cost. In order to extend the life of the shaft, in recent years a widely used abroad grouting technology. This technology requires less manpower and shorter construction time. Generally extend the life of the shaft 1 to 2 years, which can achieve considerable economic benefits. Blasting the grout to repair, first of all in the need to repair the site drilling, and then welded with a sealing cap nozzle. Connect the hose to the concrete pump straight to the ground. Grouting can be carried out locally, but also into the entire shaft