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科技导报  2015 

珞璜电厂粉煤灰微珠的精细化分选

DOI: 10.3981/j.issn.1000-7857.2015.04.008, PP. 49-55

Keywords: 煤粉炉粉煤灰,微珠,精细化分选,气流分级

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Abstract:

针对华能集团重庆珞璜电厂煤粉炉粉煤灰的利用问题,采用XRF、XRD、Siroquant定量、SEM-EDS及光学显微镜等技术手段,在深入分析煤粉炉粉煤灰的岩石学、矿物学、元素地球化学特征的基础上,对此类粉煤灰的微珠进行浮沉、弱磁选和气流分级等精细化分选实验研究。结果显示,以水为介质的浮沉实验可获得质量分数0.15%的漂珠;磁场强度208×103A/m湿式弱磁选实验可获得质量分数14.8%、Fe2O3含量44.65%的磁珠;气力旋流分级实验可获得中值粒径分别为89.6、40.2、21.3、12.7、8.1、4.9μm共6个粒度级的粉煤灰微珠产品,表明通过精细化分选获得的粉煤灰微珠产品能够适应多种领域的应用,显著提高此类粉煤灰的高值利用率。

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