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聶慶科^1,3， 李華偉^1,2，張日華^1,2， 王慶軍^1,3 ，劉雙辰¹

（1.中冀建勘集團(tuán)有限公司，河北 石家莊 050200；2.河北省工業(yè)固體廢棄物綜合利用重點(diǎn)實(shí)驗(yàn)室，河北 石家莊 050200；3.河北省巖土技術(shù)創(chuàng)新中心，河北 石家莊 050200）

 

摘 要：為了提高煤氣化灰渣的活性，增加煤氣化灰渣資源化利用的途徑和范圍，實(shí)現(xiàn)煤氣化灰渣的高值化利用，采用烘烤—球磨—篩分的方法對其進(jìn)行處理。通過粒徑分布試驗(yàn)和SEM試驗(yàn)分析活化前后、不同研磨時(shí)間的煤氣化灰渣的粒度分布和物質(zhì)形態(tài)，發(fā)現(xiàn)顆粒細(xì)度直接影響煤氣化灰渣的活性，而煤氣化灰渣顆粒的分布特征會影響膠凝材料整體的緊密堆積，從而決定硬化體的微觀密實(shí)程度。通過活化前后的煤氣化灰渣與熟石灰的抗壓和抗折強(qiáng)度試驗(yàn)驗(yàn)證煤氣化灰渣烘烤球磨活化技術(shù)的有效性。結(jié)果表明，活化后的煤氣化灰渣混合料的抗折和抗壓強(qiáng)度是未經(jīng)過活化的煤氣化灰渣熟石灰混合料的1.4~3.0倍，證明了煤氣化灰渣活化技術(shù)的可行性。

關(guān)鍵詞：煤氣化灰渣；高值化利用；活化技術(shù)；地質(zhì)聚合物

中圖分類號：TU443           

文獻(xiàn)標(biāo)志碼：A      

文章編號：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

基金項(xiàng)目：河北省重點(diǎn)研發(fā)項(xiàng)目計(jì)劃（19211505D）；中央引導(dǎo)地方科技發(fā)展資金計(jì)劃（216Z1501G）。

作者簡介：聶慶科（1965—），男，碩士，教授級高級工程師，主要研究方向：工業(yè)固廢、巖土工程。

收稿日期：2023-05-12