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| Title | Pot Ventilation & Dry Scrubbing Operations for Aluminum Smelters |
| When | Sunday, February 16, 8:30 a.m. to 4:30 p.m. |
| Location | Marriott Marquis and Marina - Balboa |
| Instructors | Margaret M. Hyland, The Unversity of Auckland; Stephan Broek, Hatch; Jim Metson, The University of Auckland; and David S. Wong, The University of Auckland |
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| Advance Member: |
$525.00 |
| Advance Nonmember: |
$575.00 |
| Advance Student: |
$300.00 |
| Late/onsite Member: |
$600.00 |
| Late/onsite Nonmember: |
$650.00 |
| Late-/onsite Student: |
$350.00 |
* Registration fees include a continental breakfast, breaks, and lunch
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Pot Ventilation & Dry Scrubbing Operations for Aluminum Smelters
This one-day short course will focus on the operation of pot ventilation and dry scrubbers in the primary aluminium smelting industry, covering fundamentals/theory of operations, key performance indicators, best practices, and upcoming advancements in technology.Anode problems that are commonly encountered in the Potrooms will also be addressed and their potential causes identified.
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Pot Ventilation & Dry Scrubbing Operations for Aluminum Smelters
This course is for technical and environmental personnel, engineers, and managers in the primary aluminium smelting industry, who are interested in their Pot Ventilation & Dry Scrubbing (or Gas Treatment Centre) operations. The course will not only provide attendees with further understanding in how their integrated ventilation system and dry scrubbers work, but also insight into how to maximize and maintain the efficiencies of their current scrubbing installations, and what options they have for future expansions or modifications.
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Pot Ventilation & Dry Scrubbing Operations for Aluminum Smelters
OVERVIEW
- Pot emissions
- Environmental regulations and permits
- History of GTCs
FLUORIDE EMISSIONS
- The Gaseous and Particulate Forms of Fluorides
- Mechanisms of Capture for both Gaseous and Particulate Fluorides
SCRUBBER DESIGNS & TECHNOLOGIES
- Dry Scrubbers: Torbed, Fluidised bed, BUT FOCUS ON Pre-injector + Bag-house Dry Scrubbers operating on Prebake smelter, NOT Soderberg (which would include PAHs)
- Wet Scrubbers: Past & Future (SOx emissions)
BASIC DRY SCRUBBER DESIGN & OPERATION (focus on Pre-injector types+ Baghouse designs)
- Key Operating Areas of the GTC
- Gas Flows
- Cell Ventilation & Pot Draft
- Gas Duct Inlets from Cells
- Gas Fans & Design
- GTC Stack & Silencers
- Alumina Flows
- Alumina Pre-Injection & Secondary Injection Points
- Primary/Secondary Alumina Recycle Ratio
- Baghouse & Bagfilters, Air-to-Cloth Ratio
- Alumina Transport - Air Slides & Air Lifts
- Alumina storage - silos
- Filtration
- Basics of filtration
KEY PARAMETERS, MAINTENANCE PRACTICES & ISSUES FOR DRY SCRUBBER
- Stack Emission Monitors - Particulate, HF, multi-channel, stack sampling
- Gas Flowrate & Gas Pressure Drops across GTC
- Ensuring Alumina Supply for Injection
- Gas Fan Performance
- Inlet Duct Gas Temperature & Considerations, Rising Line Amperage, Middle Eastern Countries, etc.
- Filter Bag Performance & Replacement
- Hard Gray Scale (Gas Ducting)
- Airslides/ Air Lifts => Fines/scale
- Silo Level Control? => Alumina fines
PRACTICAL TIPS TO EVALUATE GTC TECHNOLOGIES IN BIDDING STAGE
ADVANCEMENTS & DEVELOPMENTS IN DRY SCRUBBING
- High Draft Ventilation (Principles, effect on emissions, technologies: Dual duct, single duct, jet induced)
- Extended surface filter bags
- Technologies for managing Duct Gas Temp Cooling/Heat Exchangers [HEX technology, evaporative cooling, air dilution]
- Use of multi-channel lasers for optimisation of individual GTC filter compartments
- Future requirements for SOx emissions.
GROUP DISCUSSIONS
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