双辊铸轧8011铝熔体炉内精炼排杂  

Refining and Impurity Removal of 8011 Aluminum Melt by Twin-roll Casting

作　　者：李斌亮 程久元 丁万武[1] 刘建兴 LI Binliang;CHENG Jiuyuan;DING Wanwu;LIU Jianxing(School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Jiuquan Group Dongxing Aluminum Co.,Ltd.,Jiayuguan 735100,China)

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]酒泉钢铁集团东兴铝业有限公司,甘肃嘉峪关735100

出　　处：《有色金属工程》2023年第9期48-56,共9页Nonferrous Metals Engineering

基　　金：甘肃省重点研发计划项目(21YF5GD183);嘉峪关科技计划项目(21-10);甘肃省教育厅产业支撑项目(2021CYZC-23)。

摘　　要：依托8011铝熔体熔炼和铸轧生产线,跟踪熔体精炼过程,研究了某精炼剂在现行精炼工艺下对铝熔体中非金属夹杂的去除效果,计算精炼各阶段的夹杂去除率、熔体中含杂量及夹杂的尺寸分布。结果表明:某精炼剂在现行精炼工艺下能够去除87.95%的各类夹杂;炉内精炼结束后,熔体的平均含杂量约为154.55×10^(-6),且88%分布在小于5μm的尺寸范围,能够满足所生产产品的性能要求。依据对精炼剂和熔渣样品的检测分析,探究了熔剂的工作机理,熔剂与铝熔体中的夹杂接触并开始在夹杂表面渗透和扩散,直至熔剂将夹杂吞没,包裹夹杂的熔剂逐渐演化为球形并漂浮到铝熔体表面。Relying on the 8011-aluminum melt melting and cast-rolling production line,the melt refining process was tracked,the removal effect of a refining agent on non-metallic inclusions in aluminum melt under the current refining process was studied.And the inclusion removal rate,impurity content in the melt and the size distribution of inclusions at each refining stage were calculated.The results show that a specific refining agent can remove 87.95%of all kinds of inclusions under the current refining process.After refining in the furnace,the average impurity content of the melt is about 154.55×10^(-6),and 88%is distributed in the size range of less than 5μm,which can meet the performance requirements of the products produced.Based on the detection and analysis of refining agents and slag samples,the working mechanism of the flux was explored.The flux contacts with inclusions in the aluminum melt and begins to penetrate and diffuse on the surface of the inclusions until the flux engulfs them.The flux enveloping the inclusions gradually evolves into a spherical shape and floats to the surface of the aluminum melt.

关 键 词：熔体净化 精炼剂 炉内精炼 排杂率 精炼机理 

分 类 号：TG146[一般工业技术—材料科学与工程]