机械研磨对煤气化渣颗粒特性及火山灰活性的影响

金属矿山 ›› 2025, Vol. 54 ›› Issue (9): 294-300.

• 矿物材料 • 上一篇

机械研磨对煤气化渣颗粒特性及火山灰活性的影响

赵辰歌^1,2,3 　顾晓薇^1,2,3 　刘剑平⁴ 　赵昀奇^1,2,3 　王宏宇^1,2,3 　胡智航^1,2,3

1. 东北大学资源与土木工程学院,辽宁沈阳 110819;2. 东北大学辽宁省固废产业技术创新研究院,辽宁沈阳 110819; 3. 东北大学智慧水利与资源环境科技创新中心,辽宁沈阳 110819;4. 沈阳工业大学建筑与土木工程学院,辽宁沈阳 110870

出版日期:2025-09-15 发布日期:2025-10-10
通讯作者: 顾晓薇(1971—),女,教授,博士,博士研究生导师。
作者简介:赵辰歌(2000—),女,硕士研究生。
基金资助:
煤气化灰渣规模化分质梯级利用关键技术装备研究与示范项目( 编号:2023YFC3904303);国家自然科学基金重点项目( 编号: 52234004);中建股份科技研发课题项目(编号:CSCEC-2022-Z-21)。

Effect of Mechanical Grinding on Particle Characteristics and Volcanic Ash Activity of Coal Gasification Slag

ZHAO Chen′ge ^1,2,3 　 GU Xiaowei ^1,2,3 　 LIU Jianping ⁴ 　 ZHAO Yunqi ^1,2,3 　 WANG Hongyu ^1,2,3 　 HU Zhihang ^1,2,3

1. School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China; 2. Liaoning Solid Waste Industry Technology Innovation Research Institute,Northeastern University,Shenyang 110819,China; 3. Science and Technology Innovation Center of Smart Water and Resource Environment,Northeastern University, Shenyang 110819,China;4. School of Architecture and Civil Engineering,Shenyang University of Technology,Shenyang 110870,China

Online:2025-09-15 Published:2025-10-10

摘要/Abstract

摘要： 煤气化渣(CGS)是煤气化过程中产生的副产品,所含非晶态硅铝酸盐矿物相赋予了其作为胶凝材料使用的潜力。本研究采用机械研磨的方式对 CGS 进行活化预处理,探讨了 CGS 在水泥基胶凝材料中的适用性,并通过 XRD、SEM、TG-DTG 和 FTIR 等系列表征手段对水化反应过程进行分析,阐明了研磨时间对 CGS 颗粒特性和火山灰活性的调控机制。结果表明:CGS 颗粒尺寸随着研磨时间的增加呈先下降后上升的趋势,当研磨 80 min 时 CGS 特征粒径达到最小值,D10 、D50 、D90 分别为 1. 0 μm、4. 7 μm、23. 6 μm。机械研磨 80 min 的 CGS 表现出最优胶凝性能,水泥胶砂 28 d 活性指数为 91. 5%,28 d 抗压强度最高为 46. 5 MPa,对比未活化的胶砂抗压强度提升了 120. 4%,满足火山灰混合材料使用要求。此外,机械研磨过程破坏了 CGS 的晶体结构,有利于活性物质的释放,生成大量以钙矾石、 Ca(OH)2 和 C-(A)-S-H 凝胶为主的水化产物,可以显著提升煤气化渣的火山灰活性。从微观形貌可知,随着活化时间的增加,水化产物微观结构逐渐均匀致密。本研究为煤气化渣的资源化、规模化、高值化的利用提供了一种绿色低碳解决方案,对碳达峰、碳中和的实现具有重要意义。

关键词: 煤气化渣　机械研磨　颗粒特性　火山灰活性

Abstract: Coal gasification slag (CGS) is a by-product of the coal gasification process,and the mineral phase containing amorphous silica-aluminate gives it the potential to be used as a cementitious material. In this study,the activation pretreatment of CGS was carried out by mechanical milling to explore the applicability of CGS in cementitious materials,and the hydration reaction process was analyzed by a series of characterization means,such as XRD,SEM,TG-DTG,and FTIR,to elucidate the mechanism of the milling time on the particle properties of CGS and the activity of volcanic ash. The results showed that the particle size of CGS showed a decreasing and then increasing trend with the increase of grinding time,and the characteristic particle size of CGS reached the minimum value when grinding for 80 min,and the D10 ,D50 and D90 were 1. 0 μm,4. 7 μm, and 23. 6 μm,respectively. The mechanically milled CGS for 80 min showed optimal cementing performance,and the 28 d activity index of cementitious sand was 91. 5%. The 28 d compressive strength was up to 46. 5 MPa,which was 120. 4% higher than the compressive strength of the unactivated cementitious sand,and met the requirements for the use of volcanic ash mixes. In addition,the mechanical grinding process destroys the crystal structure of CGS,which is conducive to the release of active substances,and generates a large number of hydration products dominated by calcite,Ca(OH)2 and C-(A) -S-H gel,which has a significant enhancement effect on the activity of volcanic ash. From the microscopic morphology,it can be seen that with the increase of activation time,the microstructure of the hydration products is gradually uniform and dense. This study provides a green and low-carbon solution for the resourceful,large-scale and high-value utilization of coal gasification slag,which is of great significance for achieving carbon peak and carbon neutrality.

Key words: coal gasification slag,mechanical grinding,particle characterization,volcanic ash activity

中图分类号:

TQ536

赵辰歌, 　顾晓薇, 　刘剑平　赵昀奇, 　王宏宇, 　胡智航, . 机械研磨对煤气化渣颗粒特性及火山灰活性的影响[J]. 金属矿山, 2025, 54(9): 294-300.

ZHAO Chen′ge , 　 GU Xiaowei , 　 LIU Jianping 　 ZHAO Yunqi , 　 WANG Hongyu , 　 HU Zhihang , . Effect of Mechanical Grinding on Particle Characteristics and Volcanic Ash Activity of Coal Gasification Slag [J]. Metal Mine, 2025, 54(9): 294-300.

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机械研磨对煤气化渣颗粒特性及火山灰活性的影响

Effect of Mechanical Grinding on Particle Characteristics and Volcanic Ash Activity of Coal Gasification Slag

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