Preparation and Characterization of the Lightweight Fired Brick with Low-silicon Iron Tailings

4th International Conference on Applied Materials and Manufacturing Technology

材料科学;机械制造

Chen, Y.L.^1,2 ; Du, J.Y.^2 ; Hou, H.B.^3,4 ; Zhou, M.^3,4 ; Zhang, H.L.^1,2

Hubei Prov. Key Lab. for Efficient Utilization and Agglomeration for Metallurgic Mineral Resources, Wuhan University of Science and Technology, Wuhan

430081, China^1

College of Resources and Environmental Engineering, Wuhan University of Science and Technology, Wuhan

430081, China^2

School of Resource and Environmental Sciences, Wuhan University, Wuhan

430079, China^3

Hubei Environmental Remediation Material Engineering Technology Research Center, Wuhan

430079, China^4

关键词: Interconnected pores;    Iron tailings;    Material proportion;    Mineral composition;    Mineral phasis;    Sintering mechanism;    Sintering system;    Sintering temperatures;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/423/1/012103/pdf
DOI  :  10.1088/1757-899X/423/1/012103

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This research investigated the possibility of using low-silicon iron tailings together with bentonite, feldspar and rice husk to prepare lightweight fired brick. The bulk density and compressive strength of the lightweight fired brick with different raw material proportions and sintering temperature were studied. The mineral compositions, microstructure and sintering mechanism of the samples were analyzed by XRD and SEM. The results showed that the optimal incorporation amounts of iron tailings, bentonite, feldspar and rice husk were 40%, 30%, 10% and 8% by weight, and the suitable sintering system was 900°C for 1.5h. Under these conditions, the bulk density and compressive strength of the lightweight fired brick were 1.2294g/cm3 and 7.4MPa, respectively. The primary mineral phases of the sample were hematite, muscovite, mullite, quartz, anhydrite and microcline, which were mainly responsible for the mechanical strength of the samples, and the analysis of microstructures revealed the evenly distributed and interconnected pores and the molten minerals made contributions to the tailing brick good properties.