• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国政府科技报告 >Mineral Matter Behavior in High Carbon Conversion Coal Gasifiers
【24h】

Mineral Matter Behavior in High Carbon Conversion Coal Gasifiers

机译：高碳转化煤气化炉中的矿物质行为

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Investigations of ash agglomerates formation in high carbon conversion fluidized bed gasifiers showed that pyrite in coal is decomposed to FeS and oxidized to FeO and Fe sub 3 O sub 4 , which in turn react with clay minerals to form a low-melting ferrous aluminosilicate. This serves as the agglutinating agent, embedding other ash particles, and forming nearly spherical and dense agglomerates that selectively drop out of the fluidized bed gasification zone. Experimental results from gasification of Pittsburgh seam and Kentucky No. 11 coal chars show the progressive variation in the forms of iron compounds with increasing carbon conversion. The viscosity of a slag similar in composition to the agglomerates is measured by a needle-penetrometer viscometer, to be about 2700 Pa.s. Slagging behavior in fixed-bed gasifiers is closely related to the ash fusion point, slag viscosity, and mineral matter composition in coals, as well as the operating conditions. the viscosity of a particular iron-containing slag at a fixed temperature will be dependent on the oxidation state of the iron. The dependence of slag viscosity on mineral matter composition, and the oxidation state of iron is discussed. 7 refs., 3 figs. (ERA citation 11:018971)

著录项

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