We are focused on reducing emissions and optimizing
energy utilization for our customers’ assets.


We bring specialized process engineering and
multidisciplinary capabilities to our clients.


Our in-depth understanding of the process operations
is integral to our success.


We deliver tailored and innovative technical solutions
to our customers in the metals processing industry.

A premier global provider of process engineering, project development and consulting services in air pollution control and energy optimization in the metals processing industry.

What We Do

We address our markets through three major capabilities:

  • Consulting / Advisory
  • Conceptual / Basic Design
  • Detailed Design / Implementation

Specialist Capabilities

GCT provides specialized engineering and multi-disciplinary services for gas handling system projects covering a wide range of processes including:


  • Electric Smelting Furnace
    • Ferro-Alloy
    • Base Metal
  • Sulfide Smelting Furnace (Flash Furnace)
  • Peirce Smith Converter
  • Anode Furnace
  • Roaster
  • Refining Furnace
  • Dryer
  • Rotary Kiln


  • Electric Arc Furnace (EAF)
  • Basic Oxygen Furnace
  • Ladle Metallurgy Furnace
  • Re-Heat / Tunnel Furnace
  • Cupola / ContiArc

Featured Project

Converter Retrofit Project

Landmark EPA legislation created new SO2 NAAQS with ambient air concentration limit of 75 ppb SO2. GCT developed the project for Asarco Hayden Smelter from concept through to implementation, commissioning and start-up to significantly reduce SO2 and dust emissions from the smelter.

Key project elements include:

  • 3 New 15’x35′ Converters, complete with ancillary systems including flux and scrap feed systems
  • New hoods and off-gas collection systems to achieve >99% sulfur fixation
  • New wet gas cleaning system for acid plant
  • New Flash Furnace ventilation baghouse based gas collection system
  • Upgrade plant infrastructure including blowers, compressors, cooling towers and electrical substation
  • Retrofit 1911 era building to accommodate larger converters and ancillary systems

Ethics & Sustainability

We are leaders in our field and we strive to maintain high ethical standards and ensure that sustainability is demonstrated in everything we do.

  • Leadership and Responsibility
  • Confidentiality and Privacy
  • Integrity
  • Relationships
  • Sustainability
  • Impact on Environment
  • Safety
  • Compliance
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Non-Ferrous Projects
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Ferrous Projects
> $ 1 Billion
Total Capital Installed

Ready to Get Started?