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首页> 外文会议>The 2nd International symposium on clean steel >Phase Equilibrium for the CaO-SiO2-FeO-P2O5 System at 1673K for Dephosphorization With Multi Phase Flux
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Phase Equilibrium for the CaO-SiO2-FeO-P2O5 System at 1673K for Dephosphorization With Multi Phase Flux

机译：CaO-SiO2-FeO-P2O5体系在1673K的多相通量脱磷相平衡

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Development of the efficient hot metal dephosphorization processes during steelmaking process is one of the most essential topics for the production of high grade clean steels. Since the formation of solid solution composed of tricalcium phosphate and dicalcium silicate could obtain a considerable mass transfer of phosphorus from liquid slag into solid phase during hot metal dephosphorization, itcould obviously sustain a high phosphatecapacityof theliquid slag without huge consumption of lime or addition of fluxes, such as fluorite. The above outlines are the main idea of multi phase flux dephosphorization. For the last few decades, many studies have been done towards the scientific principles and the commercial utilization of this technique. However, the reaction mechanism by using multi phase fluxes remains unclear even by now due tolack of evidence. Based on those previous works, providing a reliable and available phase diagram for the fundamental understanding of the reaction mechanism of multi phase flux dephosphorization has become the main purpose of present research. As well known, the CaO-SiO2-FeOP2Os slag is the main component of current steelmaking process. Hence the CaO-SiO2-FeO-P2C>5 system at equilibrium has been studied at 1673K. with low oxygen partial pressure. The solid phase coexisting with liquid flux is approved to be the solid solution composed of CaO, SiO2 and P2O5. Phosphorus distributes mainly in solid solution rather than liquid phase.
机译：炼钢过程中高效铁水脱磷工艺的开发是生产高等级清洁钢最重要的主题之一。由于由磷酸三钙和硅酸二钙组成的固溶体形成可以在铁水脱磷过程中使磷从液态炉渣大量转移到固相中，因此显然可以保持液态渣的高磷酸盐处理能力，而不会大量消耗石灰或添加助熔剂，如萤石。以上概述是多相通量脱磷的主要思想。在过去的几十年中，已经对该技术的科学原理和商业利用进行了许多研究。然而，由于缺乏证据，使用多相通量的反应机理至今仍不清楚。在此之前的工作基础上，提供可靠且可用的相图，以对多相通量脱磷反应机理的基本理解成为当前研究的主要目的。众所周知，CaO-SiO2-FeOP2Os炉渣是当前炼钢工艺的主要成分。因此，在1673K下研究了CaO-SiO2-FeO-P2C> 5平衡体系。氧气分压低。与液体通量共存的固相被批准为由CaO，SiO2和P2O5组成的固溶体。磷主要分布在固溶而不是液相中。

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