The Physical Chemistry of Metallurgical Slags

这个项目是一个物理化学的调查， 钢铁制造过程中的冶金炉渣。 第一 本研究的一部分涉及去除 液态铁和研究的第二部分涉及的影响 表面活性溶质对熔渣表面张力的影响。 下文将按此顺序简要阐述这些问题。 超低碳、硫、磷钢的生产要求钢包 冶金作为炼钢的一个组成部分 过程 然而，目前的钢包冶金实践不提供 为了去除在这些过程中出现的所谓的杂质元素， 将回收的废钢装入碱性氧气炉（BOF）。 这些元素包括Sn、Pb和Cu，它们不能从 钢通过选择性氧化成渣。 产量增加 连铸钢的使用减少了内部的可用性， 废，从而增加了程度，外部废料 必须使用。 在本项目中， 在一定程度上，Sn、Pb和Cu可以从液态铁中去除， 用含CaC 2的炉渣处理。 表面张力是一种 影响泡沫渣寿命和稳定性的主要因素 并且冶金炉渣的表面张力可以显著地 由于存在低浓度的表面活性剂， 溶质。 在本项目中，将进行实验研究， 氧分压和溶质的影响 P2 O 5、Cr2 O3、CaF 2和碱金属氧化物在CaO-SiO2和FeO基 融化。 研究结果将为了解 泡沫渣现象。

This project is an investigation of the physical chemistry of metallurgical slags in iron and steel making processes. The first part of the study deals with the removal of tramp elements from liquid iron and the second part of the study deals with the influence of surface-active solutes on the surface tension of slag melts. These will be elaborated on briefly in that order in the following. The production of ultra-low C, S and P steels requires that ladle metallurgy be incorporated as an integral part of the steelmaking process. However, current ladle metallurgy practice does not provide for the removal of the so-called tramp elements which occur in recycled scrap steel charged to the Basic Oxygen Furnace (BOF). These elements include Sn, Pb and Cu which cannot be removed from steel by selective oxidation into the slag. The increased production of continuously-cast steel has decreased the availability of in-house scrap, and hence has increased the extent to which external scrap must be used. In this project an experimental study will be made of the extent to which Sn, Pb and Cu can be removed from liquid iron by treatment with CaC2-containing slags. Surface tension is one of the major factors which influence the lives and stability of slag foams and the surface tension of metallurgical slags can be significantly decreased by the presence of small concentrations of surface-active solutes. In this project an experimental study will be made of the influence of oxygen pressure and the solutes P2O5, Cr2O3, CaF2 and alkali oxides on CaO-SiO2 and FeO-based melts. The results will provide a basis for understanding the phenomenon of slag foaming.