Inorganic Chemicals Industry ›› 2026, Vol. 58 ›› Issue (3): 106-111.doi: 10.19964/j.issn.1006-4990.2025-0064

• Environment·Health·Safety • Previous Articles     Next Articles

Study on preparation of glass-ceramics from titanium-bearing blast furnace slag synergized with nickel-iron slag

ZHU Qingde1,2(), ZHU Rong1(), MU Jinwen2   

  1. 1.Institute for Carbon Neutrality,University of Science and Technology Beijing,Beijing 100083,China
    2.Gansu Jiu Steel Group Hongxing Iron & Steel Co. ,ltd. ,Jiayuguan 735100,China
  • Received:2025-02-12 Online:2026-03-10 Published:2025-07-14
  • Contact: ZHU Rong E-mail:zhuqingde@jiugang.com;zhurong1201@126.com

Abstract:

Titanium-bearing blast furnace slag and nickel-iron slag are by-products generated from vanadium titanomagnetite smelting and laterite nickel ore processing,respectively.Due to the lack of efficient utilization methods,they are largely stockpiled,occupying land resources and posing environmental risks.There is an urgent need to develop novel resource recovery approaches for these slags.In this study,titanium-bearing blast furnace slag and nickel-iron slag were utilized as primary raw materials,supplemented with waste glass to adjust SiO2 content,to prepare slag-based glass-ceramics via a melting method.The effects of slag proportions on phase composition,crystallization behavior,and properties were systematically investigated through thermodynamic equilibrium phase calculations,differential thermal analysis(DTA),X-ray diffraction(XRD),and scanning electron microscopy(SEM).The results indicated that increasing the nickel-iron slag content refined crystal grain size,but excessive addition(>40%) triggered the precipitation of chromium-containing spinel phases,compromising phase homogeneity.The optimal performance was achieved with 40% nickel-iron slag and a crystallization temperature of 950 ℃,yielding glass-ceramics with a density of 3.08 g/cm3,Vickers hardness of 723.41 HV,water absorption of 0.02%,and flexural strength of 158 MPa.This research provided theoretical and technical foundations for the synergistic high-value utilization of these industrial solid wastes.

Key words: glass-ceramics, microstructure, titanium-bearing blast furnace slag, nickel-iron slag, solid waste resource recycling

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