长寿高炉使用真正的微孔炭砖的必要性

Necessity of Applying Real Micro-Porous Carbon Block for Long-Life Blast Furnace

针对目前出现的高炉炉缸烧穿和短寿的情况,对其中一些高炉用的炭砖进行了解剖分析。结果发现:高炉炉缸烧穿和短寿的最主要原因是所用的炭砖质量太差。进口热压小炭砖是全部或部分采用电极石墨为原料生产的炭砖,而且不是微孔炭砖。某些高炉所采用的国产微孔炭砖和半石墨炭砖均为假冒伪劣产品。这些炭砖的生产工艺和技术已倒退到用普煅无烟煤生产普通炭砖的水平,而且由于加入大量电极石墨,使用效果还不如普通炭砖。为扭转高炉出现短寿的被动局面,建议采用岩相检验方法鉴别真假微孔炭砖,保证使用炭砖的高炉长寿。

In the emerging problems of hearth breakout and short life of some blast furnaces in recent years,the quality of carbon blocks adopted in the blast furnaces was analyzed.The main reason for the short life of the blast furnaces is attributed to the bad quality of the carbon blocks.Hot-pressed small carbon bricks which completely or partly made from electrode graphite as materials are not micro-porous bricks.For some blast furnaces,bad quality micro-porous carbon blocks and semi-graphite carbon blocks were applied.These carbon blocks were produced with backward technologies by adding a large amount of electrode graphite.Therefore,the quality of the carbon blocks is poor.In order to prolong the life of blast furnaces,it is necessary to pay more attention to the quality of carbon blocks.As an useful way for quality inspection,the petrography examination of carbon blocks is strongly recommended.