通过热力学计算 ,发现存在临界料管比 x*;当实际料管比 x大于 x*时 ,弯管容易烧穿 ,小于 x*时 ,正常燃烧反应。然而 ,常用的增加弯管壁厚和添加稀释剂的方法都很难圆满解决大管径陶瓷内衬复合弯管制备时的烧穿问题。本文提出了一种在大管径弯管的芯部安装芯子的新制备方法 ,成功地解决了大管径陶瓷内衬复合弯管的制备问题。 Through thermodynamic calculation, it is found that there is a critical material ratio x *. When the actual material ratio x is greater than x *, the tube is easy to burn through. When it is smaller than x *, normal combustion reaction occurs. However, it is difficult to satisfactorily solve the problem of burn-through during the preparation of large-diameter ceramic-lined composite elbows by increasing the wall thickness of the elbow and adding the diluent. In this paper, a new method for preparing a core with a large diameter elbow is proposed, which successfully solves the problem of the preparation of a composite elbow with a large diameter ceramic liner.