萍乡废弃煤矸石理化特性及热活化性能研究

硅酸盐通报 ›› 2021, Vol. 40 ›› Issue (7): 2280-2287.

萍乡废弃煤矸石理化特性及热活化性能研究

姚苏琴¹, 查文华¹, 刘新权¹, 季圣星¹, 何昌春¹, 余跃²

1.东华理工大学土木与建筑工程学院,南昌 330013;
2.安徽理工大学能源与安全学院,淮南 232001

收稿日期:2021-03-18 修回日期:2021-04-18 出版日期:2021-07-15 发布日期:2021-08-04
通讯作者: 查文华,博士,教授。E-mail:whzha@126.com
作者简介:姚苏琴(1995—),女,硕士研究生。主要从事固废资源化利用方面的研究。E-mail:842805902@qq.com

Physicochemical and Thermal Activation Properties of Waste Coal Gangue in Pingxiang Mining Area

YAO Suqin¹, ZHA Wenhua¹, LIU Xinquan¹, JI Shengxing¹, HE Changchun¹, YU Yue²

1. School of Civil and Architectural Engineering, East China University of Technology, Nanchang 330013, China;
2. School of Mining and Safety Engineering, Anhui University of Science and Technology, Huainan 232001, China

Received:2021-03-18 Revised:2021-04-18 Online:2021-07-15 Published:2021-08-04

摘要/Abstract

摘要： 为研究不同种类煤矸石的理化特性及煅烧温度对其活化程度的影响,以萍乡废弃煤矸石不同矿区样A、样B、样C为研究对象,开展了XRD测试、物理性能试验、高温试验及力学性能试验,从理化特征、力学特征、表观特征等方面对煤矸石进行了基本性能及热活化性能分析。结果表明:不同种类煤矸石的理化特性不同,活性物质含量高的煤矸石活性较高;与样A相比,样B、样C更适合做填料,且样C具有更高的孔隙率、吸水性和抵抗风化破裂的能力。不同种类煤矸石的最佳煅烧温度略有差距,但都在800 ℃左右,未煅烧或未达到最佳煅烧温度的煤矸石活性较低,所制试件胶结较差,强度不高;最佳温度煅烧的煤矸石活性最高,所制试件胶结最好,强度最高。

关键词: 煤矸石, 物理性能, 高温试验, 力学性能, 活化, 资源化利用

Abstract: In order to study the physicochemical properties of different types of coal gangue and the influence of calcination temperature on its activation degree, sample A, sample B and sample C from different mining areas of discarded coal gangue in Pingxiang were taken as the research objects. Based on the XRD test, physical property test, high temperature test and mechanical property test, the basic properties and thermal activation properties of coal gangue were analyzed from the aspects of physical and chemical characteristics, mechanical characteristics, and apparent characteristics. The results show that the physical and chemical properties of different types of gangue are different, and the gangue with higher active substance content has higher activity. Compared with sample A, sample B and sample C are more suitable for packing, and sample Chas higher porosity, water absorption and resistance to natural weathering and cracking. The optimal calcination temperature of different types of gangue varies slightly, all of them are about 800 ℃. The coal gangue which is not calcined or does not reach the optimal calcination temperature has low activity, and the prepared specimen has poor cementation and low strength. The coal gangue at the calcination optimum temperature has the highest activity, the best cementation, and the highest strength.

Key words: coal gangue, physical property, high temperature test, mechanical property, activation, resource utilization

中图分类号:

TU528

姚苏琴, 查文华, 刘新权, 季圣星, 何昌春, 余跃. 萍乡废弃煤矸石理化特性及热活化性能研究[J]. 硅酸盐通报, 2021, 40(7): 2280-2287.

YAO Suqin, ZHA Wenhua, LIU Xinquan, JI Shengxing, HE Changchun, YU Yue. Physicochemical and Thermal Activation Properties of Waste Coal Gangue in Pingxiang Mining Area[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2280-2287.

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