本文介绍一种以高铝质熟料、工业磷酸和膨胀珍珠岩为原料研制成功的一种新型保温冒口套。这种保温冒口套具有保温效果好、制备工艺简单和原料来源广泛以及成本低廉等特点。并且在生产中便于推广使用。提出从铸件的凝固模数计算保温冒口直径的新方法。 This paper introduces a new type of thermal riser sleeve which is successfully developed by using high aluminum clinker, industrial phosphoric acid and expanded perlite as raw material. This thermal riser with thermal insulation effect is good, the preparation process is simple and wide range of raw materials and low cost and so on. And easy to promote the use of production. A new method to calculate the diameter of thermal insulation riser from the solidification modulus of castings is proposed.