Mechanical properties and microstructure evolution of solidified copper tailings with hydantoin epoxy resin  

海因环氧树脂固化铜尾矿的力学性能及微观结构演变

作　　者：Yong HE Wen-qiang JIANG Ke-ping CHEN Lian-rong WU Ke-neng ZHANG Zhi-peng YU Xue-ping GAN De-shan FENG 贺勇;蒋文强;陈科平;吴练荣;张可能;喻志鹏;甘雪萍;冯德山(中南大学有色金属成矿预测与地质环境监测教育部重点实验室,长沙410083;中南大学地球科学与信息物理学院,长沙410083;云南迪庆有色金属有限责任公司,香格里拉674400;中南大学粉末冶金国家重点实验室,长沙410083)

机构地区：[1]Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Ministry of Education,Central South University,Changsha 410083,China [2]School of Geosciences and Info-Physics,Central South University,Changsha 410083,China [3]Yunnan Diqing Nonferrous Metals Co.,Ltd.,Shangri-La 674400,China [4]State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第9期3065-3076,共12页中国有色金属学报（英文版）

基　　金：financial support from the National Natural Science Foundation of China (Nos. 41972282, 41807253);the Natural Science Foundation of Hunan Province, China (No. 2021JJ30804);the Research Fund Program from Yunnan Diqing Nonferrous Metal Co., Ltd., China (No. DQYS-ZYB-09-(2021)001)

摘　　要：Based on the strength and microstructure tests,the effects of the hydantoin epoxy resin content and curing time on the mechanical properties and microstructure of copper tailings specimens were studied.The results showed that the strength of the solidified specimens was increased to 20.84 MPa with 30 wt.%addition of hydantoin epoxy resin.When the specimens with 10%hydantoin epoxy resin were cured for 7 and 14 d,the strengths were 6.33 and 6.67 MPa respectively,which met the requirements as foundation filler and building materials.The microscopic tests showed that the agglomeration was enhanced and the porosities of the solidified specimens were reduced with increase in the hydantoin epoxy resin content,which could greatly enhance the strength of solidified specimens.基于强度和微观试验,系统研究海因环氧树脂掺量和养护龄期对铜尾矿试样力学性能及微观结构的影响规律。结果表明,当海因环氧树脂掺量为30%(质量分数)时,固化体试样强度达到20.84 MPa。当海因环氧树脂掺量为10%(质量分数)的固化体的养护龄期为7和14 d时,其强度分别为6.33和6.67 MPa,均满足其作为基础填料和建筑材料的要求。微观试验结果表明,随着海因环氧树脂掺量的增加,团粒化作用加强,固化体孔隙减少,从而大大提高了固化体强度。

关 键 词：copper tailings hydantoin epoxy resin mechanical properties MICROSTRUCTURE 

分 类 号：TD926.4[矿业工程—选矿]