Enviroment friendly utilization of fly ash for Geopolymers IPW 2010 J. Hoppe, M. Tschamani, J. Petermann, M. Rohmann Lecturer: Dr. Gábor Mucsi.

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Presentation transcript:

Enviroment friendly utilization of fly ash for Geopolymers IPW 2010 J. Hoppe, M. Tschamani, J. Petermann, M. Rohmann Lecturer: Dr. Gábor Mucsi

contents 1 INTRODUCTION 2 CIRCUMSTANCES 3 FLOWSHEET OF PLANT 4 MACHINES 5 APPLICATIONS

1 INTRODUCTION problems of fly ash Present production rate of fly ash  In the United States about 131 million tons of fly ash are produced annually  125 mio t/year in the EU, 300 mio t/year China+India Groundwater contamination Spills of bulk storage Landfilling

1 INTRODUCTION possible applications Portland cement  can replace up to 30% by mass of Portland cement  can add to the concrete’s final strength and increase its chemical resistance and durability  Only class C ash (contains more than 20% lime, does not require an activator ) Geopolymers

 The reacting product consists of SiO 4 and AlO 4 tetrahedrons (network)  Can be made from natural sources of pozzolanic material such as fly ash (class F fly ash)  Resistant to chemicals  Rapid-hardening with high strenghts  High density  Temperature stable  Ecological construction material (pozzolanic = A pozzolan is a siliceous or siliceous / aluminous material that, when mixed with lime and water, forms a cementitious compound )

1 INTRODUCTION aim of the project Ethical Economical Save the raw materials Substitute landfilling by utilization Save energy Reduce CO2 Emissions Save the environment Sustainable development

2 CIRCUMSTANCES Q= tons/year Plant works 8 h/day and 230 days/year Q= 41 t/h ρ=0,9 kg/ dm3

Feed Screening Buffering Air classifier Grinding Drying > 45 µm > 5 mm n = 25% 3 Flow sheet Q = 41 t/h 2,5 t/h 38,5 t/h 29 t/h 9,5 t/h Geopolymer 29 t/h

Forming, Compacting Ageing Heat treatment Cooling Final product Activator (NaOH/KOH) Mixing additives

4 Machines Screening Zemmler STDT 4200 Througput: m3/h Fine fraction: 2 – 80 mm

4 Machines Holo-flite-dryer Metso Q3028 Length: 6 m Heating: use of waste heat

4 Machines Ball mill Zhengzhou M 3645 X 80 < 40µm Througput: 29 – 65 t/h Motor power: 1250 kW

4 Machines Air classifier Througput: 40t/h Fine fraction > 45µm

4 Machines Mixer Filling quantity Mixer (loose aggregates): 9600 kg Drive power: 160 kW Througput: 29 t/h need 7 mixer

5 Application of final material

Thank you for your attention