摘要
以钼尾矿(MoT)为主要原料,配以适量水泥(Cem)和粉煤灰(FA),采用压制成型法制备免烧砖,研究了物料配比、拌和水用量和成型压力对样品性能的影响。结果表明,当钼尾矿、水泥和粉煤灰配比为80∶10∶10,拌和水用量为10%,成型压力为15 MPa时,样品抗压强度为22.4 MPa。微观分析表明,Cem水化产物填充在样品内部缝隙中,与钙矾石相互交错在一起,将Mo T颗粒与FA颗粒紧密黏结在一起,形成紧密的网状结构,提高了免烧砖抗压强度。
Unburned bricks were prepared with MoT as the main raw material, and adding appropriate Cem and FA by press molding. The effects of material ratio, the dosage of mixing water, and the molding pressure on the performance of the sample were studied. The experiment results show that when mass ratio of MoT, Cem and FA is 80∶10∶10, the dosage of mixing water is 10%, the molding pressure is 15 MPa, the compressive strength can reach 22.4 MPa. The microscopic analysis shows that: the hydration products of Cem are filled in the cracks inside the sample and interleaved with ettringite, which closely bonded the MoT particles and FA particles together, forming a close network structure and improving the compressive strength of the unburned brick.
作者
李峰
崔孝炜
刘东
程奋武
张增光
张国春
周春生
Li Feng;Cui Xiaowei;Liu Dong;Cheng Fenwu;Zhang Zengguang;Zhang Guochun;Zhou Chunsheng(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo,Shaanxi 726000)
出处
《非金属矿》
CSCD
北大核心
2022年第1期15-18,共4页
Non-Metallic Mines
基金
陕西省教育厅重点实验室科研计划项目(18JS033)
商洛市科技计划项目(SK2016-35)
商洛学院科学与技术研究项目(16SKY032)。
关键词
钼尾矿
免烧砖
抗压强度
水化机理
molybdenum tailings
unburned brick
compressive strength
hydration mechanism
