Ladle metallurgy furnace.
Lead addition furnace required low emissions of 0.002 gr/dscfm. Small particle size of 50 percent less than four microns caused emissions exceeding permitted levels. Pressure drop had to be carefully controlled to minimize over cleaning of the bags. High air-to-cloth ratio of 4.8 fpm - 5.6 fpm created additional pressure drop problems as well as dust bleed-through.
Install full set of GORE® membrane/heavy duty polyester felt filter bags with a proprietary low-emissions construction, 400 bags per module with three modules.
Filters have been in use since September 1997. Emission results were recorded at 0.0002 gr/dscf -0.001 gr/dscfm-less than the permitted level. The filters can be cleaned at optimal cleaning pressures and intervals without bleed-through or emission spikes. Pressure drops are acceptable (5" - 8" H2 O) at ratios between 5/1 fpm - 6/1 fpm. Production is not limited due to emissions or pressure drop/lack of ladle draft.
Not for use in food, drug, cosmetic or medical device manufacturing, processing, or packaging operations