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首页> 外文会议>Ninth international conferece on molten slags, fluxes and salts >Experimental study on the liquidus of ladle slags
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Experimental study on the liquidus of ladle slags

机译：钢包渣渣液相线的实验研究

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The scope of this work was to experimentally determine the liquidus surfaces in the high basicity region of the Al2O3-CaO-MgO-SiO2 system having moderate Al2O3 and SiO2 contents at steelmaking temperatures. This system is of particular importance for secondary steelmaking slags, not only when considering refining operations, but also for preventive actions to avoid severe refractory corrosion. The existing phase diagram information in the literature is based on a comprehensive experimental study, mainly focusing on blast-furnace slags. These phase diagrams are used extensively by researchers in both steel industry and universities. However the estimated positions of the liquidus lines in the CaO-rich corner are based on very limited experimental data. In this work, the "equilibrating and quench technique" was employed to find different 2- and 3-phase equilibriums in the CaO rich corner of the Al2O3-CaO-MgO-SiO2 system at 1773 and 1873 K. The Al2O3 content was between 25 and 35 mass percent. The samples and the individual phases were quantitatively analyzed by means of EPMA (Electron Probe Micro Analysis) to obtain accurate quantitative data. Based on the EPMA data, phase diagrams were constructed at the 25, 30 and 35 mass % constant alumina planes in the Al2O3-CaO-MgO-SiO2 tetrahedron at silica contents < 20 mass percent. The results generally agreed well with phase diagrams available in the literature with some few exceptions. In addition, the activities of MgO, CaO and Al2O3 were estimated, based on solid solution information from the EPMA analysis of solid CaO and MgO.
机译：这项工作的范围是通过实验确定炼钢温度下Al2O3和SiO2含量适中的Al2O3-CaO-MgO-SiO2系统高碱度区域的液相线表面。该系统对于二次炼钢炉渣特别重要，不仅在考虑精炼操作时，而且对于避免严重的耐火材料腐蚀的预防措施也是如此。文献中现有的相图信息基于全面的实验研究，主要侧重于高炉渣。这些相图被钢铁行业和大学的研究人员广泛使用。但是，液相线在富含CaO的角中的估计位置基于非常有限的实验数据。在这项工作中，采用“平衡和淬火技术”在1773和1873 K的Al2O3-CaO-MgO-SiO2系统的富含CaO的角中找到不同的2相和3相平衡。Al2O3含量在25和35质量％。通过EPMA（电子探针显微分析）对样品和各个相进行定量分析，以获得准确的定量数据。基于EPMA数据，在二氧化硅含量＜20质量％的情况下，在Al 2 O 3 -CaO-MgO-SiO 2四面体中的25、30和35质量％的恒定氧化铝平面上构建相图。结果与文献中可用的相图大致吻合，只有少数例外。另外，基于来自对固态CaO和MgO的EPMA分析的固溶信息，估算了MgO，CaO和Al2O3的活性。

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