Phase, magnetism and thermal conductivity of glass ceramics from iron ore tailings

Abstract

In order to develop the applications of ore tailings, the glass ceramics were prepared by using a conventional melting-quenching-sintering process. The phase component, microstructures, magnetic properties and thermal conductivities of the prepared glass ceramics were investigated by using X-ray diffractometer, scanning electron microscopy, vibrating sample magnetometer and thermophysical properties tester, respectively. The results show that orthorhombic olivine-type phase and triclinic sunstone-type phase formed when the glass was annealed at 700 °C, the concentration of olivine-type and sunstone-type phases decreased, the spinel-type cubic phase occurred and the amount increased when the annealing temperatures increased. The magnetic properties from the cubic spinel ferrites were detected in the glass ceramics, and the related saturation magnetization increased with the annealing temperature increasing. The porous glass ceramics with magnetic property showed much lower thermal conductivity, compared with the non-magnetic porous glass-ceramic and the dense glass-ceramics.

Keywords

iron ore tailing / glass ceramics / microstructure / magnetic properties / thermal conductivity

References

[1] SunH-f, LiY-h, JiY-f, YangL-s, WangW-y, LiH-rong. Environmental contamination and health hazard of lead and cadmium around Chatian mercury mining deposit in western Hunan Province, China [J]. Transactions of Nonferrous Metals Society of China, 2010, 20: 308-314

[2] DasB, PrakashS, ReddyPSR, MisraVN. An overview of utilization of slag and sludge from steel industries [J]. Resources, Conservation and Recycling, 2007, 50: 40-57

[3] LuizH, MaccariniV, JaumeA. Recycling concepts and the index of recyclability for building materials [J]. Resources, Conservation and Recycling, 2013, 72: 127-135

[4] SakthivelR, VasumathiN, SahuD, MisgraB K. Synthesis of magnetite powder from iron ore tailings [J]. Powder Technology, 2010, 201: 187-190

[5] WangX L, RenR C, LiuY. Application of DTA in preparation of glass-ceramic made by iron tailings [J]. Procedia Earth and Planetary Science, 2009, 1: 750-753

[6] WatsonJ H P, BeharrellP A. Extracting values from mine dumps and tailings [J]. Minerals Engineering, 2006, 19: 1580-1587

[7] BernardoE, EdmeE, MichonU, PlantyN. Fast-sintered gehlenite glass-ceramics from plasma-vitrified municipal solid waste incinerator fly ashes [J]. Journal of the American Ceramic Society, 2009, 92: 528-530

[8] ErolM, KücükbayrakS, Ersoy-MericboyuA. Comparison of the properties of glass, glass-ceramic and ceramic materials produced from coal fly ash [J]. Journal of Hazardous Materials, 2008, 153: 418-425

[9] LuanJ, LiA, SuT, CuiX. Synthesis of nucleated glass-ceramics using oil shale fly ash [J]. Journal of Hazardous Materials, 2010, 173: 427-432

[10] ZhaoT, LiB W, GaoZ Y, ChangD Q. The utilization of rare earth tailing for the production of glass-ceramics [J]. Materials Science and Engineering B, 2010, 170: 22-25

[11] YuH-h, XueX-x, HuangD-wei. Crystallization on BaO-Fe₂O₃-SiO₂ glass-ceramic made from iron ore tailing [J]. The Chinese Journal of Nonferrous Metals, 2008, 18(11): 2076-2081

[12] LiB-w, DuY-s, ZhangX-f, JiaX-l, ChenH, ZhaoM, DengL-bo. Influence of basic composition ratio on structure and properties of slag glass-ceramics prepared by baiyunebo tailing [J]. Journal of Synthetic Crystals, 2012, 41(5): 1391-1398

[13] SunX-h, WangM-p, LinD-l, XiongY-jun. A new type of tungsten tailings glass-ceramics [J]. Journal of Central South University (Science and Technology), 1997, 28(5): 448-451

[14] ShiP-y, ZhangY, ZhangD-y, WangY-y, JiangM-fa. Crystallization behavior and properties of glass ceramic of ferrous tailings and slag [J]. The Chinese Journal of Nonferrous Metals, 2007, 17(2): 341-347

[15] GaoJ, XuC-w, ZhangY, YangM-hui. The Influence of compositions of raw materials on the physical properties of porous glass-ceramics based on iron tailings [J]. Bulletin of the Chinese Ceramic Society, 2012, 31(6): 1417-1420

[16] HuangS X, DingL, DengL W. Production and properties of cordierite-based glass-ceramics from gold tailings [J]. Materials Science and Engineering of Powder Metallurgy, 2011, 16: 553-556

[17] WoodlandA B, AngelR J. Crystal structure of a new spinelloid with the wadsleyite structure in the system Fe₂SiO₄-Fe₃O₄ and implications for the Earth’s mantle [J]. American Mineralogist, 1998, 83: 404-408

[18] SeoW G, TsukihashiF. Thermodynamic and structural properties for the FeO-SiO₂ system by using molecular dynamics calculation [J]. Materials Transactions, 2005, 46: 1240-1247

[19] SlackGA. Thermal conductivity of CaF₂, MnF₂, CoF₂ and ZnF₂ Crystals [J]. Physical Review, 1961, 122: 1451-1464

[20] SlackGA, NewnanR. Thermal conductivity of MnO and NiO [J]. Physical Review Letters, 1958, 1: 359-360