材料期刊网

1. 首页
2. 检索结果页

原词结果 | 译词结果

Effect of MgO Critical Particle Size on Properties of MgO-C Continuous Temperature-Measuring Sensor for Liquid Steel

ZHAO Shu-mao , MEI Guo-hui , XIE Zhi

钢铁研究学报(英文版)

MgO-C continuous temperature-measuring sensors for liquid steel were made of fused magnesia with different critical particle sizes from 05 to 20 mm, thus the effects what magnesia′s particle size affect sensors′ properties and lifetime were studied. The result shows that the MgO-C continuous temperature-measuring sensor has good aggression resistance to basic tundish powders and meets the requirement for response time of temperature measuring practice in tundish. The sensor′s service life, which is affected by multi-properties of material and operating environment, reached its maximum when the critical particle size of magnesia was 10 mm. The average lifetime of sensors was 43 or 40 h when served for casting SPHC or Q195 steel.

关键词: MgO , carbon , microstructure , sensors , lifetime , particle size

邯钢高炉喷吹煤粉的快速热解机制

刘然，高永亮，王杏娟，吕庆，杜林森，王竹民

钢铁

为了提高邯钢高炉喷吹煤比，模拟煤粉在高炉内的热解。以邯钢喷吹用长治煤（以下简称CL）和大湾煤（以下简称DW）为原料，采用等离子体进行快速热解，计算反应后煤粉的分解率，利用气相色谱仪对气体产物进行分析以及用扫描电镜（SEM）观察反应产物的形貌特征。试验结果表明，CL和DW的分解率分别为43.10%和5204%，气相产物主要为CO、H2、CH4、C2H2及少量C2H4等气体，热解产物的粒径减小，形貌发生明显变化。在CL煤的基础上配加不同比例的DW后，煤粉颗粒出现了孔状结构，因此可以提高炉内风口回旋区固定碳颗粒的燃烧率，为提高煤粉燃烧率提供理论依据。

关键词: 喷煤 , plasma , flash pyrolysis , decomposition rate , particle size

出版年份

刊物分类

相关作者

相关热词