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聂庆科^1,3， 李华伟^1,2，张日华^1,2， 王庆军^1,3 ，刘双辰¹

（1.中冀建勘集团有限公司，河北 石家庄 050200；2.河北省工业固体废弃物综合利用重点实验室，河北 石家庄 050200；3.河北省岩土技术创新中心，河北 石家庄 050200）

 

摘 要：为了提高煤气化灰渣的活性，增加煤气化灰渣资源化利用的途径和范围，实现煤气化灰渣的高值化利用，采用烘烤—球磨—筛分的方法对其进行处理。通过粒径分布试验和SEM试验分析活化前后、不同研磨时间的煤气化灰渣的粒度分布和物质形态，发现颗粒细度直接影响煤气化灰渣的活性，而煤气化灰渣颗粒的分布特征会影响胶凝材料整体的紧密堆积，从而决定硬化体的微观密实程度。通过活化前后的煤气化灰渣与熟石灰的抗压和抗折强度试验验证煤气化灰渣烘烤球磨活化技术的有效性。结果表明，活化后的煤气化灰渣混合料的抗折和抗压强度是未经过活化的煤气化灰渣熟石灰混合料的1.4~3.0倍，证明了煤气化灰渣活化技术的可行性。

关键词：煤气化灰渣；高值化利用；活化技术；地质聚合物

中图分类号：TU443           

文献标志码：A      

文章编号：1005-8249（2024）01-0045-07

DOI：10.19860/j.cnki.issn1005-8249.2024.01.009

 

 

 

NIE Qingke^1,3， LI Huawei^1,2 ，ZHANG Rihua 1,2， WANG Qingjun 1,3， LIU Shuangchen1

（1. China Hebei Construction＆Geotechnical Investigation Group Ltd., Shijiazhuang 050200,China; 2. Key Laboratory for Industrial Solid Waste Comprehensive Utilization of Hebei province, Shijiazhuang  050200,China; 3. Geotechnical Engineering Technology Research Center of Hebei Province, Shijiazhuang 050200,China）

Abstract: In order to improve the activity of coal gasification ash, increase the ways and scope of resource utilization of coal gasification ash, and achieve high-value utilization of coal gasification ash, the method of baking ball milling screening is used to treat it. The particle size distribution and material morphology of coal gasification ash before and after activation and at different grinding times were analyzed through particle size distribution experiments and SEM experiments. It was found that the particle size directly affects the activity of coal gasification ash, and the distribution characteristics of coal gasification ash particles can affect the overall compact stacking of cementitious materials, thereby determining the micro compactness of the hardened body. The effectiveness of coal gasification ash roasting ball milling activation technology was verified through compressive and flexural strength tests of coal gasification ash and hydrated lime before and after activation. The results showed that the flexural and compressive strength of the activated coal gasification ash mixture was 1.4~3.0 times higher than that of the non activated coal gasification ash hydrated lime mixture, proving the feasibility of coal gasification ash activation technology.

Keywords: coal gasification ash; high value utilization; activation technology; geopolymer

基金项目：河北省重点研发项目计划（19211505D）；中央引导地方科技发展资金计划（216Z1501G）。

作者简介：聂庆科（1965—），男，硕士，教授级高级工程师，主要研究方向：工业固废、岩土工程。

收稿日期：2023-05-12