【摘 要】
：
The crystallization behavior of blast-face slag under isothermal and continuous-cooling conditions was studied using the single hot thermocouple technique.The c
【机 构】
：
College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,He
论文部分内容阅读
The crystallization behavior of blast-face slag under isothermal and continuous-cooling conditions was studied using the single hot thermocouple technique.The crystallization phases were obtained using FactSage software and X-ray diffrac-tometry.The crystallization kinetic parameters were calculated by combining these results with the Johnson-Mehl-Avrami model.Under isothermal conditions,the shortest crystallization incubation time was 24 and 18 s when the temperatures were 1300 and 1150 ℃,and the corresponding critical cooling rates were 4.5 and 14.3 ℃/s,respectively.At 1270 ℃,the slag was difficult to crystallize and the fiber-forming rate improved.When the continuous-cooling rate was 6.5 ℃/s,the slag solidified into a glassy state.The main crystallization phases,gehlenite,akermanite,anorthite,and melangite,were most easily precipitated.The growth factors of melangite and anorthite were approximately 1.63 and 1.68,respectively,which indicated that the crystals nucleated on the surface and grew in two dimensions.
其他文献
根据北保赔协会(North P&I Club)提供的数据,为符合2020年适用的更严格环境法规,韩国在国内已引入新的环境法,对船舶和排放控制区域适用自愿性限速令.
为开发更多的耐盐(海水)蔬菜新品种,本研究以兼具食用和药用价值的野生蔬菜蒲公英为材料,以200 mmol/L NaCl为单盐胁迫处理,以等Na+含量的海水(盐浓度16 g/L)为复合盐胁迫处
为探究山东省滨海盐碱区生态环境改良方式,从盐碱土壤中筛选具有耐盐活性的产ACC脱氨酶菌株.以ACC为唯一氮源富集筛选目标菌株并对其产酶活力、耐盐碱性、生理生化特性、对小
果蔬采后呼吸作用旺盛,表面微生物代谢活跃,内部水分容易蒸发,品质极易在运输及储藏过程中下降.壳聚糖与壳寡糖具有广谱的抑菌效应及良好的生物相容性,相比于传统的合成保鲜
[目的]明确东北典型县域稻田土壤肥力空间变异特征,为该区域稻田土壤合理培肥管理提供科学依据.[方法]以黑龙江省方正县为研究区域,2017年在该研究区域采取114个代表性点位的
植物根系是固定植株、获取水分和营养物质的主要器官.作为连接植物体与土壤环境的枢纽,根系的发育状况直接关系着地上部分的形态建成.由细根及其根毛组成的微根系是根系功能
【目的】小麦–玉米轮作区土壤耕层变薄,直接深耕往往导致土壤肥力降低。在存在该类问题的土壤上,研究不同耕作方式和秸秆还田对作物产量和土壤理化性质的影响,以期实现在增加耕层厚度的同时维持作物产量,并提升土壤肥力。【方法】试验于2012—2016年在华北平原南部濉溪县进行,供试土壤为砂姜黑土。在人工剥离5 cm土层的耕层薄化土壤上开展试验,设旋耕(RT)、深耕(DT)、旋耕+秸秆还田(RTS)、深耕+秸
[目的]研究不同施肥处理下土壤细菌群落的特征,为建立促进土壤生态系统稳定和健康的养分管理制度提供依据.[方法]陕西省杨凌示范区“国家黄土肥力与肥料效益监测基地”的28年
Variations in tensile behavior and properties after pre-strain and thermal aging were differently affected by strain aging phenomenon dependent on microstructur
[目的]果园生草在促进树体生长发育、改善土壤理化环境和土壤肥力等方面起着重要作用,本研究旨在解决我国果园普遍存在的立地条件差和土壤改良困难、有机质含量少且缺乏补充