【摘 要】
：
In order to increase the reaction rates between the molten steel and the slag and cut down the reduction time when the top slag of manganese ore is added into t
【机 构】
：
Metallurgical Technology Research Department,Central Iron and Steel Research Institute,Beijing 10008
论文部分内容阅读
In order to increase the reaction rates between the molten steel and the slag and cut down the reduction time when the top slag of manganese ore is added into the molten steel,a method of directly alloying manganese ore has been experimented in a 500-kg induction face.The results show that the manganese yield is greater than 90％when the wire feeding method is used.The manganese yield is 43.26％within 1 min.In contrast,the manganese yield for the top-slag adding process is only 10.98％for the same duration.The mass transfer rate of the manganese is greater in the molten steel than in the slag,and the limiting factor is the mass transfer rate of the manganese in the slag in the period of 10?30 min.The slag composition area is closer to the area of high melting point for the wire feeding method than for the top-slag adding process.During the slagging process,refining slag composed of CaO and-SiO2 is formed after 15 min; after 25?30 min,refining slag with a high basicity is formed and consists of CaO,-SiO2 and-Al2O3.
其他文献
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
The crystallization behavior of blast-face slag under isothermal and continuous-cooling conditions was studied using the single hot thermocouple technique.The c
[目的]研究小麦、玉米专用硫磺树脂包膜尿素(SRCU)在水中和土壤中的氮素释放规律及其与作物氮素吸收的匹配性,并研究现有条件下其与普通尿素的配施比例,为调整该产品的氮素释