学术论文

      球团矿不同气氛下的高温抗压强度

      High temperature compressive strength of ore pellets in different atmospheres

      摘要:
      采用自行设计的高温抗压强度在线测定装置,研究了氧化球团矿在不同气氛下的高温强度变化规律,并对高温下强度变化的机理进行了分析和探讨.实验结果表明:球团矿在中性气氛和氧化性气氛下的高温强度变化规律基本一致,表现为在低于800℃的温度范围内,球团矿强度随着温度的上升而增大,但在800~900℃球团矿强度有个明显的下降,900~1100℃球团矿强度随温度的升高略有回升,1100℃以后强度急剧下降,到1200℃时已基本失去强度;中性气氛下的球团强度整体高于氧化性气氛下的强度;在还原性气氛下,球团矿强度随着温度和还原度的提高而降低,至1100℃时强度基本消失.
      Abstract:
      The high temperature compressive strength of oxidized pellets in different atmospheres was tested by means of a self-made high-temperature compressive strength on-line test system.It is shown that the variation laws of high temperature compressive strength of ore pellets in neutral and oxidizing atmospheres are basically consistent.The strength of ore pellets increases with the increase of temperature below 800 ℃,but there is a significant decrease between 800 ℃ and 900 ℃.At the range from 900 ℃ to 1 100 ℃,the strength increases slightly with the increase of temperature.There is a sharp decline of strength above 1 100 ℃ and the strength nearly disappears at 1 200 ℃.As a whole the strength of ore pellets in neutral atmosphere is higher than that in oxidizing atmosphere.In reducing atmosphere,the strength of ore pellets decreases with the increase of temperature and reduction degree and almost disappears when the temperature reaches 1 100 ℃.The mechanism of the change in high temperature compressive strength of ore pellets was analyzed.
      作者单位: 北京科技大学高效钢铁冶金国家重点实验室,北京,100083
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2011, 33(10)
      分类号: TF046
      机标分类号: TF5 TF3
      在线出版日期: 2012年4月21日
      基金项目: 国家重点基础研究发展计划资助项目