摘要
为解决山东某金矿尾砂粒径细、含泥量高导致的充填体早期强度低的问题,以该金矿尾砂为主要原料,石膏和生石灰作为复合激发剂,添加少量芒硝开发新型胶凝材料。试验结果显示:当水泥添加量为25%,生石灰添加量为15%,石膏添加量为1.5%,芒硝添加量为4%和矿渣添加量为54.5%时,充填体3,7,14d抗压强度分别为0.51,0.62,0.75MPa。在成本控制范围内,为进一步提高充填体早期强度,挖掘最优配比,配比优化试验获得超细尾砂新型胶凝材料最优配比为水泥∶生石灰∶石膏∶芒硝∶矿渣=30∶20∶1.5∶4∶44.5,充填体3,7,14d抗压强度分别为0.58,0.72,0.86MPa,满足矿山充填采矿要求。
In order to solve the problem that tailings of a gold mine in Shandong Province had low strength in the early stage due to fine particle size and high mud content,a new cementitious material was developed by adding a small amount of glaucoma nitrate,with tailings of this gold mine as the main raw material and gypsum and quicklime as the composite excitation agent.The test results show that the compressive strength of backfill in 3,7 and 14 dis respectively 0.51,0.62 and 0.75 MPa,when the cement content is 25%,quicklime content is 15%,gypsum content is 1.5%,glauburite content is 4% and slag content is54.5%.Within the scope of the cost control,in order to further improve the early strength of backfill and obtain the optimal ratio,the ratio optimization tests were carried out.And the optimal ratio of the new cementitious material based on ultrafine tailings is cement∶lime∶gypsum∶glauber∶slag=30∶20∶1.5∶4∶44.5.Under this condition,the compressive strength of backfill in 3,7 and 14 dis 0.58,0.72 and 0.86 MPa,respectively,which can satisfy the requirement of filling mining in this mine.
作者
刘树龙
李公成
孙业庚
刘国磊
王发刚
王劼
齐兆军
LIU Shulong;LI Gongcheng;SUN Yegeng;LIU Guolei;WANG Fagang;WANG Jie;QI Zhaojun(School of Materials Science and Engineering,Shandong University of Technology,Zibo,Shandong 255049,China;Institute of Resources and Environmental Engineering,Shandong University of Technology,Zibo,Shandong 255049,China;Filling Engineering Laboratory Branch,Shandong Gold Mining Technology Co.,Ltd,Laizhou,Shandong 261400,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第7期86-90,共5页
Mining Research and Development
基金
国家自然科学基金青年科学基金项目(51904178)
国家重点研发计划政府间国际科技创新合作重点专项(2018YFE0123000)
山东省自然科学基金博士基金项目(ZR2018BEE009)。
关键词
超细尾砂
胶凝材料
正交试验
抗压强度
配比优化
Ultrafine tailings
Cementitious materials
Orthogonal test
Compressive strength
Ratio optimization
