According to conventional sequence solidification principles, de-signing riser size of heavy castings by proportionally magnifying the heat center circle is wrong.
传统的顺序凝固原则，是按热节圆比例放大的方法确定厚大铸铁件的冒口，其中存在错误。
2
The heat input of gasification using coalite as solid heat carrier comes from combustion heat of the solid heat carrier in riser.