在铸钢件的生产中广泛地使用覆盖剂保温,以降低明冒口顶面的幅射热散失(这种热散失约占冒口全部热散失的40～50％)。目前,用于生产的覆盖剂种类尽管不少,现仅就我们使用碳化稻壳作为覆盖剂的试验介绍如下: 所谓碳化稻壳,就是把稻米的副产品一稻壳在缺氧的条件下加热,使其碳化,便得到了一种新型的绝热保温材料一碳化稻壳。本试验选用湖北省十堰市炼钢保护材料厂生产的碳化稻壳。 Covering agents are widely used in the production of steel castings to reduce radiative heat loss at the top of the open riser (this heat loss accounts for about 40-50% of the total heat loss from the riser). At present, although there are quite a few types of covering agents used for production, the only experiments we use with carbonized rice husk as cover agent are as follows: The so-called carbonized rice husk is a rice husk byproduct heated under anoxic conditions, So that it carbonized, we got a new type of carbonized rice husk insulation material. This experiment selects the carbonization rice hull that the steelmaking protective material factory of Shiyan City, Hubei Province produces.