Programme

Symposium Topics

High Temperature Slag Engineering

  • Physical properties: viscosity, diffusivity, density, surface and interfacial tension, thermo-conductivity, electric-conductivity, thermal expansion coefficient, optical properties of slags
  • Thermodynamic properties: activity for slag systems, slag capacities (sulphide capacities, phosphate and phosphide capacities, etc. Solubility of solid compounds in liquid slag)
  • Hot stage slag engineering
  • Slag composition modification for added value application
  • Hot stage slag carbonation
  • Heavy metal immobilisation
  • Volume stability
  • Internal slag recycling and other solid wastes utilisation in metallurgical process
  • Slag engineering to optimise metallurgical process (e.g. protect lining brick from degradation,…)
  • Slag formation, slag foaming, slag minimisation in the process
  • Controlled slag cooling and microstructure
  • Freeze lining
  • CCT and TTT curves of slag, crystal precipitation and growth kinetics
  • Mold slag solidification during continuous casting
  • Dry quenching to recover heat from high temperature slag
  • Harvesting enthalpy in slag
  • Recovery of base metals, recovery of rare earth and precious metals
  • High temperature processes
  • Mineral processing: magnetic separation, gravity separation, flotation separation, etc.
  • Clean slag production: slag design for zero waste metallurgy, deep reduction, plasma fuming, leaching, removal of harmful component from slag, etc.

Valorisation

  • Slag engineering for new binders
  • Slag comminution
  • Cements incorporating residues
  • New clinkers (belite, sulfo-aluminate, sulfo-ferrite, etc.)
  • High temperature residues as supplementary cementitious materials
  • Alkali-activated materials, inorganic polymers, geopolymers
    • Synthesis
    • Alternative activators
  • Carbonation processing
  • Hybrid cements
    • Characterisation
    • Alternative activators
  • Ceramics from high-temperature residues
  • Admixtures for cementitious materials
  • Modelling (thermodynamic, statistical, computational)
  • Advanced characterisation techniques and tools
  • Novel processing routes (e.g. additive manufacturing, microwaving, coatings, pigments, etc.)
  • Novel applications of cementitious materials (e.g. catalysis, etc.)
  • Porous materials for sound and heat insulation
  • Durability aspects of new binders
  • Leaching aspects of residues and binders
  • Real-life validation of new binder systems
  • Case studies of products in the market

Legal and environmental bottlenecks and opportunities for slag valorisation

  • Standardisation of slag-based products: Need for internationally accepted standards for slag-based construction materials.
  • Recyclability of slag-based construction materials: Need to understand the long-term behaviour of slag-based materials (recyclability second life cycle, possible re-mobilisation of heavy metals)
  • Carbon footprint of slag-based products, potential as carbon sinks: Understand the environmental balance or carbon footprint (LCA or else) of slag-based material compared to traditional construction materials. Understand their capacity to act as carbon sink (e.g. carbonation)
  • By-product or waste? Need to define the legal status of industrial slag, to strengthen their position and their value in the market.