偏析法净化原铝的研究

考察了原铝熔体偏析净化过程中冷却速度、搅拌方式、温度梯度等因素对偏析净化的影响,并对净化得到的杂质富集相和纯化相进行了结构研究·结果表明,冷却速度、搅拌方式和温度梯度在偏析净化过程中起着重要的作用·当冷却速度缓慢,搅拌充分,温度梯度较大时,偏析净化效果比较好·杂质Si,Fe主要分布在杂质富集相中,并以AlSiFe和AlSi化合物的形式存在

Purification of Aluminium Ingot by Segregation Method

The factors such as distribution of temperature field,cooling rate and thermal gradient were examined during purification of aluminium melt by the segregation method. The structure of two phases (enriching phase of impurities and purifying phase) were researched. The results show that the important factors are cooling rate, agitation condition and thermal gradient in the course of segregation purification. When the melt is cooled slowly, agitated fully and under large thermal gradient, the purification results were in good satisfactory. The impurities of Fe and Si are distributed in the enriching phase existed in the formation of Al Si Fe and Al Si compounds.