Vale canada
limited

Challenges and Hazardous Materials
The project faces several challenges due to the hazardous materials present, including:

• Asbestos: Found in the tar coating on the masonry bricks and friable asbestos in the flue expansion joints, necessitating all masonry to be treated as asbestos-contaminated.
• Other Hazards: Lead, heavy metals, silica, and flue dust, adding complexity to the demolition and disposal processes.

Scaffolding and Enclosure Installation
To safely access and isolate the flue from ongoing smelter operations, a comprehensive scaffolding system was installed over a five (5) month period by a qualified subcontractor. The scaffolding provides safe access to all levels of the flue while maintaining plant personnel’s access to critical services and equipment.

Delsan-A.I.M. subsequently enclosed the scaffolding using polyethylene tarping to contain dust and debris during demolition. Decontamination facilities were established in preparation for Type 3 asbestos abatement.

Demolition and Abatement Operations
The dismantlement of the flue is being conducted under highly controlled conditions:

• Crews wear full-face powered air-purifying respirators (PAPRs) and asbestos-fibre protective gear.
• Debris is securely bagged in rip-proof polyethylene, decontaminated, and removed via an existing freight elevator. It is then loaded into bins for disposal under the site-specific waste management program.

Additional tasks include:

• Re-supporting utilities and structures connected to the flue.
• Removing redundant piping and ensuring new floor openings are made safe.

Final Removal and Structural Dismantlement
Once the hazardous materials and masonry are removed, the enclosure will be dismantled. The supporting structure will then be taken down in pre-defined sections:

1. Sections will be rigged and separated from adjoining structures using torch-cutting equipment.
2. Hoisting equipment will lower the sections to the level below.
3. Components will be safely removed from the building.

Project Highlights
This project reflects Delsan-A.I.M.’s commitment to precision engineering, worker safety, and environmental stewardship while navigating the challenges of working within an active industrial environment. Through detailed planning and innovative approaches, the M Floor Roaster Flue is being decommissioned safely and efficiently, ensuring minimal disruption to smelter operations.