Presentation - Third International Slag Valorisation Symposium

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Residues from thermal treatment processes Coal power stations: Pulverised fuel ash (PFA)/fly ash Furnace bottom ash (FBA) Flue gas desulphurisation (FGD) waste Energy from waste: Incinerator bottom ash (IBA) Air pollution control (APC) residues Biomass ash: Incinerated sewage sludge ash (ISSA) Paper sludge ash (PSA) Wood and other biofuel ashes Steel industry: Ground granulated blast furnace slag (GGBS) Electric arc furnace (EAF) dust 12 Second International Slag Valorisation Symposium │ Cheeseman, Imperial College London
General characteristics and issues for reuse Glassy and/or crystalline, similar to volcanic ashes Aluminosilicate based, with residual carbon content and other contaminants Pozzolanic - potential for use as cement replacement materials Variable - waste residue, development of beneficiation processes Relatively low volumes in many cases Some may have fertiliser value May be hazardous wastes Concern over leaching into the environment ISCOWA - The International Society for the Environmental and Technical Implications of Construction with Alternative Materials 13 http://www.iscowa.org/ Second International Slag Valorisation Symposium │ Cheeseman, Imperial College London
Page 1 and 2: Production of sintered lightweight
Page 3 and 4: World population growth 3 http://ww
Page 5 and 6: Drivers for change Environmental is
Page 7 and 8: Conventional primary raw materials
Page 9 and 10: Wastes as important new resources S
Page 11: 11 Residues from thermal processes
Page 15 and 16: 15 Lightweight aggregate for struct
Page 17 and 18: Lightweight aggregate 17 Second Int
Page 19 and 20: Lightweight aggregate applications
Page 21 and 22: Page 21 Lytag One of the most succe
Page 23 and 24: Page 23 Schematic of a sinter stran
Page 25 and 26: Fired density (g/cm³) 3.0 2.8 2.6
Page 27 and 28: Lightweight aggregate using inciner
Page 29 and 30: Examples of UK EfW plants 29 Second
Page 31 and 32: 31 New proposed EfW facilities Sour
Page 33 and 34: Combustion at 900 to 1000°C 33 Sec
Page 35 and 36: Bottom ash recycling plant AGED RAW
Page 37 and 38: 2 1.9 1.8 1.7 1.6 1.5 1.4 1.3 1.2 1
Page 39 and 40: Lightweight aggregate manufactured
Page 41 and 42: UK sewage sludge incinerators 41 Se
Page 43 and 44: Blackburn Meadows SEM with EDS 1000
Page 45 and 46: 1.6 1.5 1.4 1.3 1.2 1.1 1 0.9 Key I
Page 47 and 48: Mechanisms occurring during rapid s
Page 49 and 50: Schematic microstructure 1 Ideal li
Page 51 and 52: Schematic microstructure 3 Marginal
Page 53 and 54: Schematic microstructure 5 Over-blo
Page 55: Acknowledgements The conference org

Presentation - Third International Slag Valorisation Symposium

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