1 / 18

Enviroment friendly utilization of fly ash for Geopolymers

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

arion
Télécharger la présentation

Enviroment friendly utilization of fly ash for Geopolymers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

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

  3. 1 INTRODUCTIONproblems 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

  4. 1 INTRODUCTIONpossible 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

  5. Geopolymers • The reacting product consists of SiO4 and AlO4 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 )

  6. 1 INTRODUCTIONaim of the project • Ethical • Economical • Save the raw materials • Substitute landfilling by utilization • Save energy • Reduce CO2 Emissions Save the environment Sustainable development

  7. 2 CIRCUMSTANCES • Q= 75000 tons/year • Plant works 8 h/day and 230 days/year • Q= 41 t/h • ρ=0,9 kg/ dm3

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

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

  10. 4 Machines • Screening • Zemmler STDT 4200 • Througput: 20-150 m3/h • Fine fraction: 2 – 80 mm

  11. 4 Machines • Holo-flite-dryer • Metso Q3028 • Length: 6 m • Heating: use of waste heat

  12. 4 Machines • Ball mill • Zhengzhou M 3645 • X80 < 40µm • Througput: 29 – 65 t/h • Motor power: 1250 kW

  13. 4 Machines • Air classifier • Througput: 40t/h • Fine fraction > 45µm

  14. 4 Machines • Mixer • Filling quantity Mixer (loose aggregates): 9600 kg • Drive power: 160 kW • Througput: 29 t/h need 7 mixer

  15. 5 Application of final material

  16. 5 Application of final material

  17. Thank you for your attention

More Related