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Al-Si合金熔渣精炼过程中Al和B在渣金两相间的迁移与分配规律
Authors
孙丽媛
王志
+4 more
葛治
谢克强
钱伟涛
马文会
Publication date
1 January 2018
Publisher
Abstract
在1500℃下将Al-Si合金与CaO-SiO_2-Al_2O_3熔渣混合精炼,考察了渣金比、精炼时间对体系中元素Al和B在渣金两相间分配的影响,并解析了这两种元素的迁移过程。结果表明:熔渣40%CaO-40%SiO_2-20%Al_2O_3和60%Al-Si合金在渣金质量比为5时,精炼硅中B含量由302.74×10~(-6)降至23.37×10~(-6)。元素Al和B在渣金两相间的迁移规律基本一致,呈现出明显的阶段性特征。合金中Al元素在精炼10 min内相间迁移最为剧烈,Al的转化率达到96.52%,剩余少量Al以Al-Si相或Al-Si-Ca相存在于硅晶界处;而B元素在精炼30 min内向渣中迁移效果最为显著,迁移比分别为12.32、10.96,继续延长时间二者含量均变化缓慢。Al元素的氧化会改变精炼渣的组成,精炼相同时间时,随渣中w(CaO+Al_2O_3)/w(SiO_2)值增大,精炼硅中B含量呈先下降后上升的趋势,B含量在w(CaO+Al_2O_3)/w(SiO_2)值1.24附近有最小值8.01×10~(-6),此时B的迁移比达到37.80。</p
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Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
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oai:ir.ipe.ac.cn:122111/33749
Last time updated on 05/12/2019
Institutional Repository of Institute of Process Engineering, CAS (IPE-IR)
See this paper in CORE
Go to the repository landing page
Download from data provider
oai:ir.ipe.ac.cn:122111/28900
Last time updated on 08/07/2019