【摘 要】
：
To solve some problems of sinter properties and slag performance existed on use of iron ores with high-Al2O3 content in blast furnace,a favour method is to add amount of MgO into sinter.In this work,e
【机 构】
：
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij
【出 处】
：
第十届中国钢铁年会暨第六届宝钢学术年会
论文部分内容阅读
To solve some problems of sinter properties and slag performance existed on use of iron ores with high-Al2O3 content in blast furnace,a favour method is to add amount of MgO into sinter.In this work,effect of MgO on melting and crystalization of binding phase in high-basicity siner has been investigated by using TG-DSC and crystalizing test of CaO-Fe2O3 system(molar ratio=1:1)combining X-ray diffraction and Scanning electron microscopy.The result showed that MgO added into CaO-Fe2O3 system increases the initial melting temperature from the eutectic temperature of CaO?Fe2O3 and CaO?2Fe2O3 to the peritectic temperature of CaO?Fe2O3 and 2CaO?Fe2O3 in the heating process,simultaneously the beginning temperature of crystallization of calcium ferrite increases with increase of MgO content in the cooling process.It was found that magnetite formed in CaO-Fe2O3 system was mainly in the heating process,especially over 1338℃,and the amount of magnetite formed increased with increase of MgO added.It was also observed in the experiments that MgO can get into magnetite,and exist in(Ca,Mg,Fe)O·Fe2O3 phase,while the MgO could not be in phases of CaO?Fe2O3 and 2CaO?Fe2O3.
其他文献
结合马钢2130mm连续退火机组特点,利用ULVAC-CCT-AY-Ⅱ型多功能连续退火模拟器模拟了600MPa级冷轧退火双相钢的生产过程.采用金相、彩色金相组织观察方法以及力学性能测定方法,研究了在不同退火速率条件下实验用双相钢的组织形貌和力学性能特点.结果表明,随着连退带钢速度的增加,马氏体含量逐渐增加,马氏体分布逐渐变得弥散细小,实验钢抗拉强度略有增加,屈服强度和屈强比均为先增加后降低的趋势;
Centreline segregation occurs as a positive concentration of alloying elements in the mid-thickness region of continuously cast slab.Depending upon the severity of elemental segregation,variations in
Grapheneoxide(GO)/functionalized graphene(FG)/graphene oxide after mild reduction(RGO)reinforced waterborne polyurethane(PU)composite coatings were fabricated on galvanizedsteel surfaces.The anticorro
对线材拉拔半成品钢丝目视观察到的表面疑似横裂纹进行了夹杂物、金相、电镜能谱和冷镦钢检测分析,在金相显微、背散射探头和二次电子探头下观察未发现表面裂纹;缺陷试样表面局部轻微打磨处理后在二次电子探头下观察表面光滑,颜色与钢基体一样呈均匀灰白色,确定钢丝表面目视疑似横裂纹应为没有向基体延伸、没有深度的横纹.横纹在线材和拉拔半成品钢丝上周期性出现,拉拔加工过程不能消除.钢材上的横纹对应在轧钢风冷辊道的搭接
Manganese-rich austenitic twinning-induced plasticity(TWIP)steels with high strength and exceptional ductility have received much attention in the past two decades.Tremendous efforts have been made to
本文利用正交试验法,研究了淬火温度、淬火方式、回火温度、回火时间四个因素对力学性能的影响,运用极差分析方法分析了正交试验结果.结果表明,热处理工艺参数对布氏硬度的影响程度次序为:淬火方式＞回火温度＞回火时间＞淬火温度;对冲击韧性的影响程度次序为:淬火方式＞回火时间＞淬火温度＞回火时间.随着淬火温度的升高,布氏硬度和冲击功均呈先降低后升高的趋势.随着回火温度的升高,布氏硬度呈下降趋势,冲击功先升高后
A review of resource application and development of carbon dioxide in the ferrous metallurgy process is presented.Study on resource utilization of CO2 in the steelmaking process is significant to the
The impurities on the bonded interface were analyzed using optical microscopy and scanning electron microscopy(SEM),and the formation mechanism of oxides were investigated and discussed.The results sh
Inhibition of austenite grain growth above the eutectoid temperature in steels is of great importance in the steel production processes.The occurrence of abnormal grain growth of austenite during heat
本文通过对核主元分析方法的理论研究,提出了一种在核函数参数选取问题上进行优化的方法,通过相似度函数求解最优核参数值.这种方法提出了一种参数选取规则,很大程度上减小了计算量,使其在工业过程的状态监测中的实用性得到进一步提高.通过对采样实验数据的仿真研究,利用不同工作状态下的数据特征较准确地实现了正常与故障工况数据的分离,取得了较好的分类识别效果,证明了这种方法的有效性.