燃煤循环流化床锅炉灰、渣超微粉胶凝特性研究

王建科; 廖洪强; 段思宇; 杨烨霖; 高宏宇

doi:10.13205/j.hjgc.202208015

燃煤循环流化床锅炉灰、渣超微粉胶凝特性研究

doi: 10.13205/j.hjgc.202208015

1. 山西大学资源与环境工程研究所, 国家环境保护煤炭废弃物资源化高效利用技术重点实验室煤电污染控制及废弃物资源化利用山西省重点实验室, 太原 030006;
2. 太原科技大学环境科学与工程学院, 太原 030006

基金项目:

国家重点研发计划课题(2020YFB0606204)

山西省重点研发计划项目(201903D311007)

山东省重大科技创新工程项目(2019JZZY020306)

详细信息

作者简介:
王建科(1997-),男,硕士研究生,主要研究方向为工业固废资源化利用。2414859219@qq.com

通讯作者:
廖洪强(1966-),男,教授,主要研究方向为固废资源化利用。liaohq@sxu.edu.cn.

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- 文章访问数: 167
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- 被引次数: 0
出版历程
- 收稿日期: 2021-11-27
- 刊出日期: 2022-11-08

CEMENTITIOUS CHARACTERISTICS OF ULTRAFINE POWDER FOR COAL-FIRED CFB ASH AND CFB SLAG

1. State Environment Protection Key Laboratory of Efficient Utilization of Coal Waste Resources & Shanxi Key Laboratory of Coal and Electricity Pollution Control and Waste Resource Utilization, Institute of Resources and Environment Engineering, Shanxi University, Taiyuan 030006, China;
2. College of Environmental Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030006, China

摘要

摘要: 针对燃煤循环流化床锅炉(CFB)灰渣资源化利用问题,利用超音速蒸汽粉磨机对CFB灰与渣进行超细化处理,对比研究了CFB灰、渣超微粉及其复配料的胶凝特性,包括抗压强度、标准稠度用水量、安定性、凝结时间等。结果表明:在保证满足P·F 42.5强度标准的前提下,CFB灰在水泥中的掺入量可达到40%,CFB灰超微粉为55%,CFB渣超微粉为25%,CFB灰与渣按照2∶1复配,超微粉的掺入量可达到40%;CFB灰渣超微粉的掺入,显著增加了水泥体系标准稠度用水量。且在掺入量高(≥70%)时会导致胶凝体系出现早凝现象,掺入量低(≤55%)时则体现出缓凝的作用。固废超微粉掺入导致水泥体系体积安定性变差,但仍满足GB 175—2020《通用硅酸盐水泥》标准要求(＜5 mm)。
- CFB灰 /
- CFB渣 /
- 超微粉磨 /
- 胶凝特性
Abstract: Aiming at the problem of resource utilization of coal-fired circulating fluidized bed boiler (CFB) ash and slag, the CFB ash and slag were ultra-refined by a supersonic steam mill. The cement-based cementitious properties of CFB ash ultrafine powder and their mixtures were compared and studied, including compressive strength, water requirement of normal consistency, stability and setting time. The results showed that under the premise of meeting the P·F 42.5 strength standard, the incorporation of CFB original ash in cement reached 40%, the CFB ash ultrafine powder was 55%, the CFB slag ultrafine powder was 25%, and the incorporation of CFB ash and slag wltrafine powder reached 40% if the CFB ash and slag were mixed according to 2∶1. The incorporation of CFB slag ultrafine powder significantly increased the water requirement of normal consistency of the cement system. A large dosage (≥70%) would lead to the early setting of the cementitious system, and less dosage (≤55%) would show retarding effect. Although the addition of solid waste superfine powder led to the deterioration of volume stability of the cement system, it still met the requirements of China’s national standard, GB 175—2020 Common Portland Cement (＜5 mm).
- CFB ash /
- CFB slag /
- superfine pulverization /
- gelation characteristics

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参考文献(28)

[1]	李恒,刘伟,梁曼,等.我国粉煤灰综合利用途径及对减排降碳的影响分析[J].居业,2021(11):165-166.
[2]	张力,李星吾,张元赏,等.粉煤灰综合利用进展及前景展望[J].建材发展导向,2021,19(24):1-6.
[3]	陈志诚,王浙锋,傅雄.燃煤电厂粉煤灰资源化利用的思考[J].绿色环保建材,2021(8):60-61.
[4]	徐硕,杨金林,马少健.粉煤灰综合利用研究进展[J].矿产保护与利用,2021,41(3):104-111.
[5]	HERATH C,GUNASEKARA C,LAW D W,et al.Performance of high volume fly ash concrete incorporating additives:a systematic literature review[J].Construction and Building Materials,2020,258:120606.
[6]	刘仓,金亮,陈航超,等.粉煤灰资源化提取研究进展[J].煤炭工程,2021,53(增刊1):127-133.
[7]	张宇娟,张永锋,孙俊民,等.高铝粉煤灰提取氧化铝工艺研究进展[J/OL].现代化工:1-5[2022-01-13 ].
[8]	燕飞,李春林,吕辉.空心微珠增强铝基复合材料的制备工艺及性能研究进展[J].材料导报,2021,35(增刊2):376-380.
[9]	田巧艳,亢福仁,张凯煜,等.煤基固废生态化利用研究进展[J].榆林学院学报,2021,31(6):57-62.
[10]	褚琳琳,宋媛媛,吕晓昊.粉煤灰制备沸石的合成方法研究及环保应用[J].河北环境工程学院学报,2021,31(5):62-66 ,81.
[11]	高福宁,岳峰,刘耀,等.CFB粉煤灰在路基填料中的工程特性研究[J].山西交通科技,2021(3):19-22.
[12]	米美霞,陈玉鹏,武小钢,等.粉煤灰和蚯蚓粪施用对土壤蒸发的影响[J].节水灌溉,2021(11):25-31.
[13]	贺敬平,武善元,云明,等.水泥-粉煤灰煤矿含水层复合注浆材料性能研究[J].中国资源综合利用,2021,39(9):4-6 ,22.
[14]	熊路长,万志军,张源,等.超高掺量粉煤灰胶凝材料基本性能研究[J].硅酸盐通报,2019,38(4):1038-1044.
[15]	张曼曼,鲁海峰,年宾,等.地面注浆加固顶板高掺量粉煤灰水泥浆液材料性能研究[J].煤矿安全,2020,51(6):60-65.
[16]	刘刚,林崇雄,李维洲,等.蒸养条件下大掺量粉煤灰水泥浆体性能研究[J].新型建筑材料,2020,47(8):91-96.
[17]	范杰,邹书琴,杨雨霏,等.大掺量粉煤灰型水泥砂浆的力学性能及干缩性能研究[J].混凝土,2020(6):130-133.
[18]	刘攀.循环流化床粉煤灰(渣)综合利用研究和规模化生产[J].砖瓦,2019(12):42-46.
[19]	段思宇,李溪,廖洪强,等.掺CFB粉煤灰超微粉水泥性能研究[J].混凝土,2020,4(2):94-97 ,100.
[20]	李端乐.掺超细循环流化床粉煤灰水泥的特性研究[D].北京:中国矿业大学(北京),2018.
[21]	段思宇.钢渣—粉煤灰—脱硫石膏复合胶凝体系的反应机制及应用研究[D].太原:山西大学,2020.
[22]	FENG J J,LIU S H,WANG Z G.Effects of ultrafine fly ash on the properties of high-strength concrete[J].Journal of Thermal Analysis and Calorimetry,2015,121(3).
[23]	黄根,王宾,徐宏祥,等.粉煤灰综合利用与提质技术研究进展[J].矿产保护与利用,2019,39(4):32-37.
[24]	李广建,杨飞,付海峰,等.蒸汽动能磨制备超细固硫灰及其应用研究[J].化工矿物与加工,2019,48(10):56-60.
[25]	董建勋,洪雪莲,王琛.循环硫化床粉煤灰超细化研究[J].河南化工,2021,38(4):17-20.
[26]	曾玻.粉煤灰物理特性对水泥浆体力学性能及微观结构的影响[D].成都:西南科技大学,2021.
[27]	杨烨霖,廖洪强,段思宇,等.粉磨方式对粉煤灰理化特性的影响[J].中国粉体技术,2022,28(1):52-61.
[28]	黄莹,谢友均,刘宝举.粉煤灰掺量和细度对水泥凝结时间的影响[J].水泥,2003(12):4-6.