摘要
以包钢高炉渣为主要原料,外加少量的石英砂和含铬晶核剂成分,采用熔融一步法制备微晶铸石,并对其进行X射线衍射分析(XRD)、扫描电镜(SEM)观察以及理化性能分析,研究炉渣碱度对微晶铸石晶化行为及理化性能的影响规律。结果表明,碱度低于0.95时,其主晶相为镁黄长石(Ca2MgSi_(2)O_(7))、钙铝黄长石(Ca_(2)Al_(2)SiO_(7))和少量辉石(CaMgSi_(2)O_(6));碱度高于1.0时,辉石消失。从微晶铸石显微结构来看,碱度低于0.95时,晶粒较大,分布较为稀疏;碱度为0.95时,晶体呈不规则的块状、粒状,粒径约2~5μm,分布均匀、致密;碱度高于0.95时,晶粒较小,出现较多显微裂纹。碱度为0.90~0.95的微晶铸石,综合性能优于天然大理石,可以作为天然大理石的替代品,从而为提高工业固废利用率和附加值、缓减环境污染开辟了新途径。
Using Baosteel blast furnace slag as the main raw material,with a small amount of quartz sand and chromium-containing nucleating agent,microcrystalline cast stone was prepared by a one-step melting method,and X-ray diffraction(XRD)analysis,scanning electron microscopy(SEM)observation,and physical and chemical performance analysis were carried out to study the influence of slagbasicityon the crystallization behavior and physical and chemical properties of microcrystalline cast stone.The results showed that when the basicity was below 0.95,the main crystal phases were calcium magnesium yellow feldspar(Ca_(2)MgSi_(2)O_(7)),calcium aluminum yellow feldspar(Ca_(2)Al_(2)SiO_(7)),and a small amount of pyroxene(CaMgSi_(2)O_(6));when thebasicity is higher than 1.0,pyroxene disappears.From the microstructure of microcrystalline cast stone,when thebasicity is below 0.95,the grain size is larger and the distribution is sparse;when the basicity is 0.95,the crystal appears as irregular blocks or granules with a particle size of about 2-5μm,evenly distributed and dense;when thebasicity is higher than 0.95,the grain size is smaller and more microcracks appear.Microcrystalline cast stone with an basicity of 0.90-0.95 exhibits better comprehensive performance than natural marble and can be used as a substitute,opening up new avenues for improving industrial solid waste utilization adding value and reducing environmental pollution.
作者
吕智智
王艺慈
王晨
柴轶凡
张利萍
常宏涛
曹旭
LÜZhizhi;WANG Yici;WANG Chen;CHAI Yifan;ZHANG Liping;CHANG Hongtao;CAO Xu(School of Metallurgical Future Technology,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;School of Rare Earth Industry,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Key Laboratory of Green Extraction and Efficient Utilization of Light Rare-Earth Resources,Ministry of Education,Inner Mongolia University of Science and Technology,Baotou 014010,Nei Mongol,China;Iron-making Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Nei Mongol,China)
出处
《钢铁研究学报》
北大核心
2025年第7期960-966,共7页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(52464041)
一流学科科研专项资助项目(YLXKZX-NKD-041)
“固废资源化”国家重点研发计划资助项目(2020YFC1909105)
内蒙古自治区科技重大专项计划资助项目(2021ZD0016)
内蒙古自治区高等学校科学研究资助项目(NJZZ23056)
内蒙古自治区直属高校基本科研业务费资助项目(2023XKJX002)。
关键词
高炉渣
微晶铸石
碱度
晶化行为
理化性能
blast furnace slag
microcrystalline cast stone
basicity
crystallization behavior
physical and chemical property
