• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Waste management & research >Stabilization/solidification of ashes in clays used in the manufacturing of ceramic bricks
【24h】

Stabilization/solidification of ashes in clays used in the manufacturing of ceramic bricks

机译：陶瓷砖生产中使用的粘土中灰分的稳定/固化

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

This paper presents the results of the lixiviation of metals from different mixtures of fly and bottom ashes that have been stabilized and solidified in clays used in the manufacture of bricks. The ashes used for this study were obtained from a Hoffmann-type brick furnace adapted for the incineration of municipal solid waste during the manufacturing of ceramic bricks. The ashes were stabilized in clay in different proportions of clay : ash mix (99 : 1, 95 : 5, 90 : 10, 80 : 20 and 60 : 40). Such mixes were used to manufacture bricks that were calcined at a temperature ranging from 50 to 1100°C. The clay, ashes and manufactured bricks were characterized using X-ray diffraction, fluorescent X-ray, thermogravimetry, differential thermal analysis, atomic absorption spectroscopy and scanning electronic microscopy. In addition, toxicity characteristic leaching procedure lixiviation tests were performed according to the EPA 1311 method for the determination of heavy metals. The results showed an affinity between clay and ash, and also that the bricks manufactured with these mixtures present low lixiviation levels. The tests also showed the highest decrease in the concentration of arsenic, nickel, chromium, zinc and silver for 99 : 1 mixtures. The 95 : 5 mixture was found to be the most favourable for the stabilization (greater concentration decrease) of lead and cadmium. Selenium was the metal with the lowest concentration change whereas arsenic, nickel, chromium, zinc and cadmium showed the greatest concentration change in all mixtures, with the exception of cadmium in the mixture 99 : 1.
机译：本文介绍了粉煤灰和底灰不同混合物中金属的浸析结果，这些粉煤灰已在制造砖的粘土中稳定并固化。用于该研究的灰烬是从霍夫曼型砖窑中获得的，该炉适合于在制造陶瓷砖的过程中焚烧城市固体废物。灰分以不同比例的粘土：灰分混合物（99：1、95：5、90：10、80：20和60:40）稳定在粘土中。这种混合物用于制造在50至1100℃的温度下煅烧的砖。使用X射线衍射，荧光X射线，热重分析，差热分析，原子吸收光谱法和扫描电子显微镜对粘土，灰烬和制成的砖块进行了表征。此外，根据EPA 1311方法进行了毒性特征浸出程序浸滤试验，以确定重金属。结果表明粘土和灰分之间具有亲和性，并且用这些混合物制造的砖还表现出较低的浸透度。测试还表明，对于99：1的混合物，砷，镍，铬，锌和银的浓度降低幅度最大。发现95：5的混合物最有利于铅和镉的稳定化（浓度降低）。硒是浓度变化最小的金属，而砷，镍，铬，锌和镉在所有混合物中的浓度变化最大，除了混合物99：1中的镉外。

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