洁净钢精炼钢包内衬耐火材料服役损毁过程及其Monte Carlo模拟

In order to improve quality and production of clean steel in China , there is an urgent need to develop refractories with high quality and low consumption for clean steel ladle lining .Currently, the gradually damage process and laws for ladle lining refractories during whole service time are not clear, moreover the researchs of this aspect by using Monte Carlo simulation method have not been reported. Therefore, study object of the project focus on steel refining ladle lining refractories. Based on clarify the damage reason by field measurement and simulation experiment,combined with the thermodynamics and kinetic analysis of ladle lining refractories in service process, the regional and time-sharing model of the damage process for ladle lining refractories during service will be built. By the computer simulation modeling with Monte Carlo method, we can quantitative analysis of the structural evolution and kinetic characteristics of ladle lining refractories during whole service time, and visually clarify the damage mechanism of the clean steel ladle lining refractories during service process. This project can provide utility guidance and theoretical basis for improvement of clean steel quality, reduce consumption of refractories, and ensure safety of the ladle. On the other hand the direction and specific path can be indicated for the development of new and improved ladle lining refractories for clean steel. Meanwhile it will have important reference to research and development of more efficient refractories.

提高我国洁净钢产量和质量，迫切需要发展高品质、低消耗的洁净钢精炼钢包内衬耐火材料。目前洁净钢钢包内衬耐火材料在使用服役周期逐步损毁的过程及机理还不明晰，而采用Monte Carlo法模拟研究洁净钢钢包内衬耐火材料随服役时间变化的损毁过程尚未见报道。因此，本项目以洁净钢钢包内衬耐火材料为研究对象，通过现场实测和模拟实验弄清其使用损毁原因，结合使用过程的热力学和动力学分析，建立钢包内衬耐火材料服役损毁过程的分区分时模型；采用Monte Carlo方法进行计算机仿真模拟，定量分析钢包内衬各区耐火材料组织结构随服役时间的演变过程及其动力学特征，可视化地阐明洁净钢精炼钢包内衬耐火材料服役损毁机制，为确保钢包安全运行、降低钢包耐火材料消耗、提高洁净钢质量提供实用指导和理论依据；也为开发生产新型优质洁净钢冶炼用耐火材料指明方向和具体路径，对更多高效耐火材料的研发及应用提供重要的借鉴。

本项目系统研究了几类典型洁净钢钢包内衬耐火材料（非氧化物复合镁铝质浇注料、刚玉-尖晶石质浇注料、镁碳砖、稳定性镁白云石材料）组成、结构、高温使用性能及其使用损毁变化规律。.采用静态坩埚法研究了在不同温度和钢渣碱度下钢包内衬耐火材料试样的抗渣侵蚀情况，然后重点采用感应炉旋转浸渍法研究了钢包内衬耐火材料试样的动态损毁过程，对试样损毁程度进行测量分析，探讨了钢包内衬耐火材料试样侵蚀损毁的变化规律，并且分别研究了钢水温度、浸渍时间、钢渣碱度、试样转速对钢包内衬耐火材料试样损毁的影响，然后设计正交试验，试验分析了三因素三水平对钢包内衬耐火材料试样损毁的影响。.以中低品位矿石（高硅菱镁矿，镁橄榄石尾矿）为原料合成出以方镁石、硅酸钙为主要物相的稳定性镁白云石熟料，在利用原料中杂质的基础上提高了对原料资源的综合利用率；以合成原料制备的烧成稳定性镁白云石材料达到了国标GB/T2775-2007中M-95B、M-93烧成镁砖的指标；烧成稳定性镁白云石材料、烧成稳定性锆镁白云石材料和Al/Si复合不烧稳定性镁白云石材料具有良好的抗侵蚀和抗热震性能，能发挥碱性耐火材料对洁净钢钢水不污染、能净化的作用。.通过现场实测和模拟实验弄清钢包内衬耐火材料使用损毁原因，结合使用过程的热力学和动力学分析，建立钢包内衬耐火材料服役损毁过程的分区分时模型；采用Monte Carlo方法进行计算机仿真模拟，定量分析钢包内衬各区耐火材料组织结构随服役时间的演变过程及其动力学特征，可视化地阐明洁净钢精炼钢包内衬耐火材料服役损毁机制，为确保钢包安全运行、降低钢包耐火材料消耗、提高洁净钢质量提供实用指导和理论依据；也为开发生产新型优质洁净钢冶炼用耐火材料指明方向和具体路径，对更多高效耐火材料的研发及应用提供重要的借鉴。