...
首页> 外文期刊>Fuel >Flow properties and rheology of slag from coal gasification
【24h】

Flow properties and rheology of slag from coal gasification

机译:煤气化炉渣的流动特性和流变学

获取原文
获取原文并翻译 | 示例
           

摘要

We have studied the rheological characteristics of Texaco gasifier slag at high-temperature. Slag samples have been analyzed by X-ray fluorescence, X-ray diffraction, and scanning electron microscopy. The rheological behavior of the slag has been investigated experimentally using a high-temperature rheometer at temperatures between 1200 ℃ and 1340 ℃. The effects of the shear rate and temperature on the rheological behavior of the slag have been explored. Moreover, the observed rheological behavior of the slag has been correlated with its solid-phase content, as calculated with the aid of the computer software package FactSage. The results show that the sensitivity of the slag viscosity to temperature decreases with increasing rotation speed. Above its liquidus temperature calculated by FactSage, the slag behaves as a Newtonian fluid; below its liquidus temperature, however, the rheological behavior of the slag becomes non-Newtonian owing to its increased solid-phase content. Meanwhile, Slag containing a number of crystalline particles shows dramatic shear-thinning and thixotropic behavior. Moreover, the shear-thinning behavior of the slag becomes ever more distinct as the temperature is decreased. The yield stress values of the slag and the number and particle size of the crystalline particles in the slag increase with decreasing temperature.
机译:我们研究了德士古气化炉渣在高温下的流变特性。炉渣样品已通过X射线荧光,X射线衍射和扫描电子显微镜进行了分析。使用高温流变仪在1200℃至1340℃的温度范围内对渣的流变行为进行了实验研究。研究了剪切速率和温度对炉渣流变行为的影响。而且,观察到的炉渣的流变行为已经与其固相含量相关联,如借助于计算机软件包FactSage所计算的。结果表明,炉渣粘度对温度的敏感性随转速的增加而降低。高于FactSage计算的液相线温度时,炉渣表现为牛顿流体。在低于其液相线温度时,由于其固相含量增加,炉渣的流变行为变为非牛顿型。同时,含有许多结晶颗粒的炉渣显示出显着的剪切稀化和触变性。而且,随着温度的降低,炉渣的剪切稀化行为变得更加明显。炉渣的屈服应力值以及炉渣中结晶颗粒的数量和粒径随温度降低而增加。

著录项

  • 来源
    《Fuel》 |2010年第7期|p.1709-1715|共7页
  • 作者单位

    Engineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, PR China;

    rnEngineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, PR China;

    rnEngineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, PR China;

    rnEngineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, PR China;

    rnEngineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, PR China;

    Electric Power Development Corporation Ltd., Tokyo 167-0023, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    viscosity; rheology; gasifier slag;

    机译:粘度流变学气化炉渣;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号