(MERAF) for the Base Metals Smelting Sector - CCME

4.4.2. Inco Limited, Thompson Division, Thompson Manitoba
Reductions of air emissions (other than sulphur dioxide) in the order of 20 to
50%, depending on the substance, might be achieved by improving the existing
gas cleaning system. This would involve:
• Increasing the capacity of the main stack electrostatic precipitator
(ESP)
• Improving all of the collection systems at source to reduce the amount
of leakage air
• Installing local baghouse collection and dust recycle systems where this
is appropriate
Any further reduction in total particulate matter and CEPA-toxics or a reduction of
SO 2 emissions would likely require the installation of wet scrubbing of smelter
gases, followed by recovery of SO 2 to produce sulphuric acid. This could
probably be justified only if it were part of a smelter modernization and capacity
increase program.
Table 69 provides a summary of the potential emission reductions in 2008 and
beyond 2008 for the Inco Thompson complex.
Table 69: Inco Thompson Emission Reductions in 2008 and Beyond
Parameter 1988 1998 2008 projection 2015 projection
Total
Particulate
Matter
Sulphur
Dioxide
(tonnes) (tonnes) (tonnes) % reduction
from 1988
(tonnes)
% reduction from
1988
2917 919 735 75% 90 97%
283,200 217,000 217,000 23% 21,700 92%
Arsenic 20.7 4.03 3 85% 0.4 98%
Cadmium
No releases reported
Lead 3.2 1.08 11 75% 0.1 97%
Mercury
No releases reported
Nickel 343.5 103.9 85 75% 10 97%
Table 70 contains a summary of options to reduce air emissions.
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