1 Modernization: Economic Benefits | Greater Efficiency | Jobs | Sustainable Energy | Improved Air Quality slide 1 of 16

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  Introductions   Project Description   Facilities Retained   Wet to Dry Process   Key Areas Examined

in DEIS   Schedule

www.lafargeravenafacts.com

Agenda

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  Martin Turecky, Lafarge Plant Manager, Ravena Plant

  John Reagan, Lafarge Environmental Manager, Ravena Plant

  Bill Voshell, Lafarge Regional Environmental Manager

  Marc Desimone, Lafarge Engineering Manager

  Elena Barnett, HDR Vice President

  Jim Brown, HDR Senior Vice President

Lafarge Team

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The Ravena Process Today: Wet Process

Wet Process (1950-60’s Technology)   Raw materials are mixed with water and

ground in slurry mills. Slurry is stored and homogenized in large slurry basins.

  Slurry mixture is fed directly to the kiln without preheating.

  A large amount of extra fuel is used in evaporating the water.

  A larger kiln is needed, because much of the kiln’s length is used up for the drying proces.

  In 1962, the Ravena cement plant’s nearly 600-foot long kiln was the largest piece of moving industrial equipment in the world.

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The Ravena Process Tomorrow: Dry Process

 Raw materials are ground, mixed, and fed to a kiln in a dry state. Ground dry material is preheated in a preheater tower.

 The preheater tower is a tall vertical structure in which the dry kiln feed enters at the top of the tower and is heated by kiln exhaust gas entering at the bottom of the tower.

 Preheating of the ground dry material prior to entering the kiln results in substantial energy savings compared to the energy required to heat the wet slurry mixture.

 The Rotary kiln length of approximately 200 ft. is much shorter than the wet kilns.

 New emissions control technology includes: scrubber, SNCR, state-of-the-art dust collectors and CEMS.

Dry Process Pre-heater/pre-calciner kiln line (State-of-the-art Technology)

 Reduced process waste.

 ZERO process wastewater discharges through re-use and recycling.

 Minimization of Impacts to Hudson River:

•  Achieves objectives of Hudson River Estuary Program.

•  Flow minimization through reuse/recycle of wastewater and use of non-Hudson River water sources.

•  DEC approved best technology available for water intake from the Hudson River to minimize impacts to aquatic organisms.

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Facilities Retained   Quarry facilities   Conveyors   Administration building   Laboratory   Maintenance facilities   Cement Storage Silos   Wharf facilities   Most supporting infrastructure

Facilities Removed   Raw Mills (2)   Coal Mills (2)   Slurry Basins (2)   Kilns (2)   Electrostatic

Precipitator Building   Clinker Coolers (2)   Associated drives, fans

and ancillary equipment   Stack

Facilities

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Ravena’s Quarry

New Facilities

Phase ll   Power generating system   Finish mill   Clinker storage   Preblending system

  Secondary crusher   Raw mill storage bins   Raw mill   Alkali bypass   Coal mill   Prehemogenization silo   Kiln   Preheater precalciner tower   Clinker cooler

  Scrubber   SNCR—selective non-

catalytic reduction   Baghouse dust collectors   Fans, drives and ancillary equipment   Continuous Emissions Monitors

(CEMs): NOx, SO2, PM, Hg, CO/CO2, THC and HCl

Phase l

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Raw Milling   Horizontal configuration to vertical   Same raw materials except water

Wet vs. Dry

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Kiln Feed Storage   Dry storage silo   12 hour storage   Extraction and transport of powder

Wet vs. Dry

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Wet Process Dry Process

Wet vs. Dry

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Lafarge Ravena Plant Proposed Plant Modernization Project

  Land Use and Zoning

  Solid Waste

  Noise

  Traffic

  Visual Impact

  Water and Coastal Resources

  Natural Resources

  Socioeconomic

  Air Quality

  Energy Resources

Key Areas Examined

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DEIS: Water, Energy & Waste Comparison: Modernized Facility & Existing Plant

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Existing vs. New Plant Emissions from modernized plant compared to existing plant

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The Future Modernization Project Timeline

State-of-the-Art New Facility

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Modernization Benefits

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Lafarge Ravena Plant Modernization Project Information and Updates

Learn more and get project updates online at: lafargeravenafacts.com

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