冲天炉采用密筋热风炉胆,不仅能提供热风,提高炉子的热效率,而且因为炉胆內壁光滑,上小下大形成一个倒锥,所以还能改善炉料的运行,减少炉料搭棚的危险。但是密筋炉胆制造比较复杂,使用寿命短,维修和更换都很麻烦,因此,如何提高炉胆的使用寿命是设计中必须考虑的一个重要问题。 Cupola with dense hot air furnace gall, not only to provide hot air, improve the thermal efficiency of the stove, and because the inner wall of the furnace is smooth, small down to form a reverse cone, it can also improve the charge operation, reduce the risk of burden scaffolding . However, the production of dense tendons furnaces is rather complicated, and has a short service life, which is troublesome for maintenance and replacement. Therefore, how to improve the service life of the furnaces is an important issue that must be considered in the design.