电厂灰渣制备井下膏体充填材料试验研究

doi:10.11872/j.issn.1005-2518.2021.04.212

Abstract

Abstract:

The application of power plant ash to mine goaf filling can enrich aggregate source and consume a large amount of solid waste，which has important social benefits.Power plant ash mainly refers to the ash produced by coal-fired power generation，which is a kind of bulk solid waste with the characteristics of large discharge and low utilization rate.The properties of ash produced by different types of power plants are very different，but they generally have certain pozzolanic activity and gelation characteristics，so they are good filling materials.In order to explore the influence of different ash residues on the strength of the filling body，fluidized bed bottom slag，fluidized bed fly ash and fly ash were mixed with different ratios as filling aggregate，ordinary silicate cement was used as cementation material，and add water to prepare paste material，then fluidity test and compressive strength test were carried out.The results show that：（1）The fluidized bed ash contains some cementation components，the fly ash has the water-reduction effect and the pozzolanic activity，both of which are good downhole filling materials.（2）When the moisture content of paste material exceeds its critical moisture content，the fluidity will be greatly improved，which will also lead to segregation and dehydration of the filling material，then reduce the strength of the filling body.（3） When the ratio of fluidized bed bottom slag，fluidized bed fly ash and fly ash is 6∶2∶1，cement content is 10%，the slurry concentration is 73%，the slump is 20 cm，and the 28 d strength of the filling body can reach 3.3 MPa.This ratio not only meets the requirements of slurry fluidity and backfill strength，but also greatly reduces the filling cost.（4）Taking the above ratio as the control group，the grading optimization experiment was carried out.The undisturbed bottom slag was broken，then the fine particles with different particle sizes and proportions were used as fine aggregate to replace the undisturbed bottom slag.When the particle size of the broken bottom slag less than or equal to 5 mm and the replacement rate is 10%~15%，the strength of filling body reaches 2.4 MPa on 7 day and 3.5 MPa on 28 day，and the strength is significantly improved.The experimental study of the paste filling material prepared from the ash residue of power plant with a specific ratio provides data support and theoretical basis for engineering application，which is of economic value and environmental protection significance.

Key words: paste backfill, power plant ash, proportioning test, moisture content, slump, compressive strength, grading optimization

CLC Number:

X705

Xin ZHAO,Long HAI,Bo XU,Tongjun CHENG. Experimental Study on Preparation of Paste Filling Materials from Power Plant Ash[J].Gold Science and Technology, 2021, 29(4): 582-592.

Figures/Tables 16

Table 1

Table 2

Fig.1

Fig.2

Table 3

Fig.3

Fig.4

Fig.5

Fig.6

Table 4

Table 5

Fig.7

Table 6

Table 7

Fig.8

Fig.9

References 0

	Binay K D，Swapan K，Durjoy M，2009.Leaching of elements from coal fly ash：Assessment of its potential for use in filling abandoned coal mines［J］.Fuel，88（7）：1314-1323.
	Cavusoglu I，Yilmaz E，Yilmaz A O，2021.Additivity effect on properties of cemented coal fly ash backfill containing waterreducing admixtures［J］.Construction and Building Ma-terials，267：1-15.
	General Administration of Quality Supervision，Inspection and Quarantine of the People’ s Republic of China，2017.Fly Ash Used for Cement and Concrete：［S］.Beijing：Standards Press of China.
	General Administration of Quality Supervision，Inspection and Quarantine of the People’s Republic of China，2008.Portland Cement for General Use：［S］.Beijing：Standards Press of China.
	Hai Long，Liang Bing，Dai Hongfeng，al et，2014.Study on the reasonable and rational proportional mixture of dry-mixed mortar with fly ash for brick-making［J］.Journal of Safety and Environment，14（1）：157-159.
	Kurniawati M，Azhari N J，Kadja G T，al et，2021.Conversion of coal fly ash into advanced crystalline materials［J］.IOP Conference Series：Earth and Environmental Science，623（1）：1-7.
	Lankapati H M，Lathiya D R，Choudhary L，al et，2020.Mordeniteâ type zeolite from waste coal fly ash：Synthesis，characterization and its application as a sorbent in metal ions removal［J］.Chemistry Select，5（3）：1193-1198.
	Li Chuanying，Qi Wenchao，2016.Cement macadam filling technology［J］.World Nonferrous Metals，（14）：73-75.
	Li Shiquan，Yu Xufeng，Cao Lejuan，al et，2019.Research of mixing ratio and fly ash modification of magnesium phosphate cement［J］.Concrete，（4）：111-113.
	Liang Songqiao，1980.The scientific experiment of using coal ash of power plant as underground filling material［J］.Coal Science and Technology，（9）：66.
	Liu Mengru，Yang Yadong，Yang Sujie，al et，2020.Research on status of comprehensive utilization of fly ash［J/OL］.Industrial Minerals & Processing：1-5［2020-10-11］..
	Mehmet S K，2018.Pulverized fuel ash cement activated by nanographite［J］.ACI Materials Journal，2018，115（6）：803-812.
	Michal A G，Daria J N，Mariusz D，2019.The influence of fluidized bed combustion fly ash on the phase composition and microstructure of cement paste［J］.Materials，12（17）：2838-2851.
	Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2019.Standard for Soil Test Method：［S］.Beijing：China Planning Press.
	Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2009.Construction Industry Standards of the People’s Republic of China：［S］.Beijing：Standards Press of China.
	Ministry of Housing and Urban-Rural Development of the People’s Republic of China，2009.Standard for Test Method of Basic Properties of Construction Mortar：［S］.Beijing：China Architecture and Building Press.
	Ministry of Transport of the People’s Republic of China，2005.Test Rules for Cement and Cement Concrete for Highway Engineering：［S］.Beijing：China Communications Press.
	Radha R，Manish K J，2017.Effect of bottom ash at different ratios on hydraulic transportation of fly ash during mine fill［J］.Powder Technology，315：1-36.
	Ren Fengyu，Zhai Huichao，Cao Jianli，al et，2012.Study on technology of mined out area filling in Paishanlou gold mine［J］.China Mining Magazine，21（1）：72-74.
	Senecal P K，Felix L，2019.Diversity in transportation：Why a mix of propulsion technologies is the way forward for the future fleet［J］.Results in Engineering，4：1-11.
	Tang Qian，2020.Research status of fly ash utilization and its application in environmental protection［J］.China Resources Comprehensive Utilization，38（5）：41-43.
	Wang En，2016.Mineralogy properties comparison of PC fly ash and CFB fly ash［J］.Clean Coal Technology，22（4）：26-29.
	Wang Yanan，Xiao Changlai，Liu Ting，al et，2013.Leaching experimental research on influence of ash storage field in a pow plant on groundwater fluorine pollution［J］.Water Saving Irrigation，（5）：40-42.
	Wei Shaoqing，Tian Xiuqing，Yang Fengling，al et，2017.Effect of combustion on the characteristics of fly ash and slag in coal-fired power plants［J］.Clean Coal Technology，23（6）：83-89.
	Ye Zhiyuan，Wang Qianqian，2020.Preparation and performance of aluminosilicate based solid waste cementitious materials［J］.Gold Science and Technology，28（5）：658-668.
	Yi H，Luo Q M，Hu H L，2012.Situation analysis and countermeasures of China’s fly ash pollution prevention and control［J］.Procedia Environmental Sciences，16：690-696.
	Yi Longsheng，Xu Yuanhong，Zhao Lihua，al et，2020.Influencing factors for setting time of fly ash-based geopolymer［J］.Mining and Metallurgical Engineering，40（1）：114-117.
	Yin Shenghua，Liu Jiaming，Chen Wei，al et，2020.Optimization of the effect and formulation of different coarse aggregates on performance of the paste backfill condensation［J］.Chinese Journal of Engineering，42（7）：829-837.
	Zhang Xiaofang，Chen Ruimin，Jian Wenbin，2020.Study on water conversion law and solidification mechanism of cement-slag-fly ash solidified silt［J/OL］.Journal of Engineering Geology：1-11.［2020-12-30］..
	Zhao Jihui，Wang Dongmin，Hui Fei，al et，2014.Characterization and resource utilization of circulating fluidized bed ash of gangue power plant［J］.China Mining Magazine，23（7）：133-138.
	Zhou X X，Shen J M，2020.Micromorphology and microstructure of coal fly ash and furnace bottom slag based light-weight geopolymer［J］.Construction and Building Materials，242：1-10.
	海龙，梁冰，戴宏锋，等，2014.粉煤灰普通砌筑干混砂浆合理配比研究［J］.安全与环境学报，14（1）：157-159.
	李传迎，齐文超，2016.碎石胶结充填工艺［J］.世界有色金属，（14）：73-75.
	李十泉，于旭峰，操乐娟，等，2019.粉煤灰改性磷酸镁水泥试验研究［J］.混凝土，（4）：111-113.
	梁松乔，1980.用电厂粉煤灰作为井下充填材料的科学试验［J］.煤炭科学技术，（9）：66.
	刘梦茹，杨亚东，杨素洁，等，2020.粉煤灰资源综合利用现状研究［J/OL］.化工矿物与加工：1-5［2020-10-11］..
	任凤玉，翟会超，曹建立，等，2012.排山楼金矿采空区充填技术研究［J］.中国矿业，21（1）：72-74.
	汤倩，2020.粉煤灰利用研究现状及其在环境保护中的应用［J］.中国资源综合利用，38（5）：41-43.
	王恩，2016.煤粉炉粉煤灰与循环流化床粉煤灰矿物学性质比较［J］.洁净煤技术，22（4）：26-29.
	王雅男，肖长来，刘婷，等，2013.某电厂灰渣贮灰场对地下水氟污染影响的淋滤实验研究［J］.节水灌溉，（5）：40-42.
	魏绍青，田秀青，杨凤玲，等，2017.燃烧工况对燃煤电厂灰渣理化特性的影响［J］.洁净煤技术，23（6）：83-89.
	叶智远，王倩倩，2020.铝硅酸盐固废胶凝材料制备及其性能［J］.黄金科学技术，28（5）：658-668.
	易龙生，许元洪，赵立华，等，2020.粉煤灰基地质聚合物凝结时间的影响因素研究［J］.矿冶工程，40（1）：114-117.
	尹升华，刘家明，陈威，等，2020.不同粗骨料对膏体凝结性能的影响及配比优化［J］.工程科学学报，42（7）：829-837.
	张小芳，陈瑞敏，简文彬，2020.水泥—矿渣—粉煤灰固化淤泥的水分转化规律及其固化机理研究［J/OL］.工程地质学报：1-11.［2020-12-30］..
	赵计辉，王栋民，惠飞，等，2014.矸石电厂循环流化床灰渣特性分析及其资源化利用途径［J］.中国矿业，23（7）：133-138.
	中华人民共和国国家质量监督检查检疫总局，2017.用于水泥和混凝土中的粉煤灰：［S］.北京：中国标准出版社.
	中华人民共和国国家质量监督检查检疫总局，2008.通用硅酸盐水泥：［S］.北京：中国标准出版社.
	中华人民共和国交通部，2005.公路工程水泥及水泥混凝土试验规程：［S］.北京：人民交通出版社.
	中华人民共和国住房和城乡建设部，2009.建筑砂浆基本性能试验方法标准：［S］.北京：中国建筑工业出版社.
	中华人民共和国住房和城乡建设部，2009.中华人民共和国建筑工业行业标准：［S］.北京：中国标准出版社.
	中华人民共和国住房和城乡建设部，2019.土工试验方法标准：［S］.北京：中国计划出版社.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed

Comments

Recommended 0

No Suggested Reading articles found!

灰渣类型	堆积密度/（g·cm^-3）	比重	含水率/%	烧失量/%
流化床底渣	0.96	2.53	0.79	7.75
流化床飞灰	0.72	2.61	0.81	9.74
粉煤灰	0.89	1.99	0.18	2.63

材料类型	细度/%			试验方法
材料类型	试验值1	试验值2	平均值	试验方法
流化床飞灰	43.41	42.96	43.19	45 μm方孔筛余量
粉煤灰	53.92	52.22	53.07
水泥	3.36	4.16	3.76

分组序号	坍落度/cm	含水率/%	质量浓度/%
1	20.0	36	73.5
2	20.0	37	73.0
3	20.0	40	71.4
4	20.0	41	71.0
5	20.0	39	72.0

分组序号	配比	抗压强度/MPa					质量浓度/%
分组序号	配比	1 d	3 d	7 d	14 d	28 d	质量浓度/%
1	5∶2∶2	0.51	1.60	2.32	2.91	3.34	73.5
2	6∶2∶1	0.53	1.62	2.37	2.94	3.36	73.0
3	5.5∶3∶0.5	0.50	1.57	2.29	2.63	3.03	71.4
4	5.5∶3.5	0.47	1.55	2.17	2.47	2.91	71.0
5	6∶3	0.49	1.59	2.30	2.83	3.25	72.0

分组序号	细骨料含量/%	C_u	C_c	级配情况	分组序号	细骨料含量/%	C_u	C_c	级配情况
第一组	5	4.26	1.19	不良	第二组	5	4.28	1.20	不良
	10	6.11	1.47	良好		10	5.13	1.25	良好
	15	9.15	1.86	良好		15	5.75	1.20	良好
	20	10.96	1.17	良好		20	6.18	0.98	不良
	25	12.72	1.35	良好		25	6.28	0.72	不良
	30	13.66	0.90	不良		30	6.48	0.56	不良

Experimental Study on Preparation of Paste Filling Materials from Power Plant Ash

RichHTML

PDF (PC)

Abstract

Cite this article

share this article

Figures/Tables 16

References 0

Related Articles 15

Metrics

Comments

Recommended 0

序号	细骨料粒径/mm	细骨料占比/%	质量浓度/%	不同养护龄期的充填体抗压强度/MPa
序号	细骨料粒径/mm	细骨料占比/%	质量浓度/%	1 d	3 d	7 d	14 d	28 d
1	≤2	5	73.0	0.45	1.51	2.15	2.48	2.94
2	≤2	10	73.0	0.51	1.58	2.27	2.56	3.26
3	≤2	15	72.7	0.49	1.54	2.23	2.50	3.13
4	≤2	20	72.5	0.45	1.54	2.03	2.41	2.85
5	≤2	25	72.5	0.43	1.51	1.89	2.27	2.68
6	≤5	5	73.0	0.55	1.64	2.42	2.96	3.35
7	≤5	10	73.0	0.52	1.67	2.47	3.11	3.56
8	≤5	15	72.7	0.58	1.71	2.49	3.17	3.61
9	≤5	20	72.7	0.55	1.53	2.25	2.85	3.32
10	≤5	25	72.5	0.53	1.49	2.19	2.63	2.97

[1]	Ying SHI, Ruiyang NIE, Shitong ZHOU, Sicheng LU, Zixuan QING. Effect of Sulfate-Containing Wastewater on the Properties of Phosphogypsum-Based Cemented Paste Backfill [J]. Gold Science and Technology, 2024, 32(3): 416-424.
[2]	Xianfeng XU,Pengfei XING,Yong WANG,Suihong WANG. Experimental Study on Rock Mechanical Properties Based on L-Type Rebound Instrument [J]. Gold Science and Technology, 2022, 30(4): 550-558.
[3]	Yefan LIU,Ying SHI. Study on Dynamic Mechanical Characteristics of Phosphogypsum Cemented Filling Body [J]. Gold Science and Technology, 2022, 30(4): 574-584.
[4]	Zhonghui WANG,Qianfu WANG,Yakun TIAN,Lingling WU,Xueyang YU,Zhijun ZHANG. Study on Consolidation Characteristics of Tailings with Different Moisture Content Under Dry-Wet Cycle [J]. Gold Science and Technology, 2022, 30(1): 54-63.
[5]	Long HAI,Bo XU,Xin ZHAO. Optimization of Aggregate Gradation of Paste Filling Material Prepared by Construction Waste [J]. Gold Science and Technology, 2021, 29(4): 573-581.
[6]	Biwei HU, Tubing YIN, Xibing LI. Experimental Study on Mechanical Impact Breaking Rock with Microwave Radiation [J]. Gold Science and Technology, 2020, 28(4): 521-530.
[7]	Zhaodong HUANG,Deming ZHANG,Yikai LIU,Qinli ZHANG,Hao WANG. Effect of Citric Acid Immersing Pre-treated on the Performance of the Phosphogypsum Cemented Paste Backfill [J]. Gold Science and Technology, 2020, 28(1): 97-104.
[8]	Zhu SU,Deming ZHANG,Qinli ZHANG. Study on Cementation Filling Test and Environmental Effect of Gold Mine Tailings [J]. Gold Science and Technology, 2019, 27(6): 912-919.
[9]	Huazhe JIAO, Xiangfei JIN, Xinming CHEN, Yixuan YANG, Jinxing WANG. Flow Channel Distribution and Mesoscopic Seepage Rule of Unclassified-tailings in Gravity Thickening Processing [J]. Gold Science and Technology, 2019, 27(5): 731-739.
[10]	Wenfeng XIAO,Jianhong CHEN,Yi CHEN,Ximei WANG. Optimization of Multi-objective Filling Slurry Ratio Based on Neural Network and Genetic Algorithm [J]. Gold Science and Technology, 2019, 27(4): 581-588.
[11]	Jianping ZHAO,Minghu WANG,Yihan ZHAO. Influence of Moisture Content on Dynamic Tensile Strength of Sandstone [J]. Gold Science and Technology, 2019, 27(2): 216-222.
[12]	Xibing LI,Bing LIU. Review and Exploration of Current Situation of Backfill Mining in Hard Rock Mines [J]. Gold Science and Technology, 2018, 26(4): 492-502.
[13]	CHENG Hao, XU Tao, ZHOU Guanglei, FANG Ke. Numerical Simulation of Fracture and Acoustic Emission Evolution of Hetero-geneous Rocks [J]. Gold Science and Technology, 2018, 26(2): 170-178.
[14]	WANG Jin, GONG Fengqiang. Study On Rate Effect of Uniaxial Compression Test for Red Sandstone [J]. Gold Science and Technology, 2018, 26(1): 56-63.
[15]	LAN Zhipeng，WANG Xinmin，WANG Hongjiang，CHEN Qiusong. Experiment Research on Slurry Setting Time’s Effect on High-sulphur Backfill’s Compressive Strength [J]. Gold Science and Technology, 2016, 24(5): 13-18.

分组序号	流化床底渣/%	流化床飞灰/%	粉煤灰/%	水泥/%
1	50	20	20	10
2	60	20	10	10
3	55	30	5	10
4	55	35	0	10
5	60	30	0	10