炼钢模铸采用保护渣浇注后,使钢锭的表面质量、头部质量得到改善,成坯率有了提高。特別是近年来推广绝热板帽口、保护渣、膨胀发热剂“三位一体”浇注工艺后,效果更加明显。然而,“三位一体”浇注中使用的“721”石墨渣,对低碳钢增碳严重,使用受到限制。以电厂灰为基的低碳保护渣,虽可避免增碳,但由于电厂灰成份及性 Steel mold casting mold powder pouring, so that the ingot surface quality, head quality has been improved, the billet rate has been increased. In particular, in recent years to promote insulation plate hat mouth, mold flux, expansion agent fever “Trinity” pouring process, the effect is more obvious. However, the “721” graphite residue used in the “Trinity” pouring has serious restrictions on the use of carbon in mild steel. To power plant ash-based low-carbon mold flux, although carbon can be avoided, but due to the power plant ash content and sex