为了优化宽厚板钢锭的生产工艺,以铸造模拟软件ProCAST为平台进行不同中空间距侧壁保温下钢锭温度场数值模拟,研究中空间距对45 t大型钢锭定向凝固过程的影响。模拟结果表明,中空侧壁对钢锭定向凝固具有明显的保温作用,抑制了侧壁传热;当中空厚度为4 mm时保温效果最好,延长了全凝时间,从而提高了宽厚板钢锭的质量。 In order to optimize the production process of wide slab ingot, the numerical simulation of the temperature field of ingot under different hollow space sidewall insulation was carried out by casting simulation software ProCAST to study the influence of hollow space on the directional solidification process of 45 t large ingot. The simulation results show that the hollow side wall has obvious thermal insulation effect on the directional solidification of the ingot, which restrains the heat transfer on the side wall. When the hollow thickness is 4 mm, the thermal insulation effect is the best, which prolongs the total solidification time and improves the quality of the ingot .