The project requires extensive planning, engineering, and close collaboration with smelter personnel in order to facilitate on-going operations. Due to the presence of asbestos in the tar coating on the masonry bricks and friable asbestos in the flue expansion joints, the project specifications indicated that all masonry was assumed to be asbestos contaminated. Other hazardous materials that were identified as being present in the flue were lead and other heavy metals as well as silica and flue dust.
The only safe method to access and isolate the flue from other smelter operations was to install scaffolding along its entire height. The scaffolding was erected over a five (5) month period by a qualified subcontractor, to permit safe access to the various levels of the flue, while ensuring continued access for plant personnel to live services, utilities, and process equipment.
Delsan-A.I.M. is undertaking a major, labour-intensive, selective demolition project that involves the complete removal of the M Floor Roaster Flue at the Vale Copper Cliff Nickel Refinery. The flue is located within an operating smelter in an area of the building that is approximately 24’-8” wide by 107’-6” long. Extending between four (4) levels of the building, it consists of a large duct with a cross-sectional area of 20’ wide by 26’ high. It was constructed using approximately 588,000 lbs. of structural clay tile and 700,000 lbs. of refractory brick and is supported by structural steel that ties into the main building framing.