Based on the principle of volume contraction of freezing, the designing process of riser fitting to the cast steel inserted die with exothermic covering flux has been studied.
根据体收缩原则，研究了适用于模具镶块铸钢件加发热覆盖剂保温的冒口设计工艺。
The results show that the particle size has a core-annular flow pattern in radial position and solid volume fraction is much denser at the bottom of the riser.
结果表明：颗粒在管内呈环—核流动结构，固含率在轴向上呈“上稀下浓”的分布特征。
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