Project: Upgrade to Alumina Storage and Weighing
Client: Rio-Tinto Alcan
Location: Kitimat, British Columbia
CMC Engineering and Management Ltd. was contracted to develop innovative means to recapture lost storage and to upgrade the throughput capacity of Rio-Tinto Alcan's Kitimat plant alumina handling system.
As part of its Kitimat plant-upgrading project, Rio-Tinto Alcan addressed some long-term problems with its alumina handling facility. CMC was awarded a contract in October 2000 to develop concepts that accomplished the following:
- Rejuvenate alumina silos to minimize 'dead' alumina storage.
- Minimize or eliminate alumina agglomeration within the silos.
- Remotely control/automate silo discharge gates and valves.
- Improve the consistency and repeatability of alumina blending from silos.
- Improve alumina inventory management/tracking capabilities.
- Prevent water from coming into contact with alumina.
- Prevent alumina dust from being released into the environment.
- Improve the self-cleaning capabilities of alumina screening devices.
CMC visited the Kitimat Works between October and December 2000 to conduct site surveys and investigate these issues. A number of working meetings were held with Alcan stakeholders to present/discuss remedial concepts suggested by CMC. The final reports included general plans, recommendations and budgetary pricing for:
- Cleaning out and modifying the existing alumina silos.
- Upgrading belt scales.
- Replacing belt conveyors with air slide conveyors.
- Modifying existing air slide conveyors.
- Repairing water leaks in silos and conveyor tunnels.
- Replacing alumina screeners.
- Improvements in the automation.