...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >Enrichment of residual carbon in entrained-flow gasification coal fine slag by ultrasonic flotation
【24h】

Enrichment of residual carbon in entrained-flow gasification coal fine slag by ultrasonic flotation

机译：超声波浮选在夹带流气化煤精细渣中富集残留碳

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Entrained-flow gasification coal fine slag is a low value and difficult-to-separate solid waste. In this work, ultrasonic flotation experiments are adopted to enrich the residual carbon and are compared to conventional flotation. The concentrate yield and concentrate ash content decrease by 9.94% and 16.54%, respectively, with the flotation perfect index 12.60% higher. Scanning electron microscopy/energy-dispersive X-ray spectroscopy and thermogravimetric analysis show that the ultrasonic flotation has a positive effect on the residual carbon enrichment. Furthermore, the wet screening results prove that the ultrasonic flotation has a more significant crushing effect on the entrained-flow gasification coal fine slag particles than conventional flotation, mainly benefitting the flotation of small particles (i.e. 0.15-0 mm size fractions). Moreover, after ultrasonic emulsification, the collector can be dispersed more evenly and the surface tension of the collector-deionized water system is decreased, which is beneficial to improving the selectivity of the collector. In addition, with ultrasonic pretreatment at 180 W for 4 min in pulp and emulsification at 180 W for 20 s in the collector-deionized water system, the bubbles in the froth layer are the smallest and most stable, and the merging of the bubbles becomes less obvious.
机译：夹带流气化煤精细炉渣是低值和难以分离的固体废物。在这项工作中，采用超声波浮选实验来富集残留碳，并与常规浮选进行比较。浓缩产率和浓缩灰分含量分别降低9.94％和16.54％，浮选完美指数增加12.60％。扫描电子显微镜/能量分散X射线光谱和热重分析表明，超声波浮选对残留碳富集具有积极影响。此外，湿筛选结果证明，超声波浮选对夹带流动气化煤细渣颗粒具有比传统浮选更显着的破碎效果，主要是有益于小颗粒的浮选（即0.15-0mm尺寸分数）。此外，在超声波乳化之后，收集器可以更均匀地分散，并且收集器去离子水系统的表面张力降低，这有利于提高收集器的选择性。另外，在180W的超声预处理在纸浆中4分钟并在收集器 - 去离子水系统中以180W的乳化进行乳化，泡沫层中的气泡是最小，最稳定的气泡，并且气泡的合并变为不太明显。

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