用冲天炉熔制高极铸铁的各种方法中,现在普遍采用的方法,是在包子内加入各种孕育剂,如矽钙、矽铁、矽铝等。但这种方法在某些情况下,仍有相当的困难;如铁水要求有较高的温度,但用普通方法熔制,不一定能够得到;又如炉料铁的化学成份必须严格控制,相差不能太大,尤其是碳加矽的含量。而且孕育剂加入铁水后,有效时间不长,如要浇铸 In the various methods of melting high-grade cast iron with a cupola, a commonly used method is to add various inoculants such as calcium silicate, silicon iron, silicon aluminum and the like in the bun. However, this method may still be quite difficult in some cases. For example, hot metal requires a higher temperature but it can not be obtained by conventional methods. For example, the chemical composition of the charge must be strictly controlled and not different Too large, especially carbon plus silicon content. And inoculant after adding hot metal, the effective time is not long, if you want to cast