Technical Report
 

Kiln-drying Oregon maple paper roll plugs

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https://ir.library.oregonstate.edu/concern/technical_reports/c247ds15b

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  • Four charges of S-inch paper roll plugs of Oregon maple were kiln-dried at various temperatures and humidities. The charge with the most desirable combination of short drying time and low degrade was dried to 12 per cent moisture content in lit hours, using a dry-bulb temperature of 160 degrees F and a wet-bulb temperature of 122 degrees F. Pieces in the charge suffering degrade in an empirical test amounted to 10 per cent of the total pieces in the charge. At a final average moisture content of 8 per cent, 80 per cent of the plugs dried with the best schedule were within plus or minus 2 per cent of the average. The average of the tangential and radial shrinkage was 4 per cent. With the best schedule used, boiler horsepower requirement for drying a charge of 2300 five-inch plugs was calculated to be 9 hp with kiln efficiency of 33 1/3 per cent, and 6 hp with kiln efficiency of 50 per cent.
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file details kil_dry_ore_map_pap_.pdf 2017-07-03 Public Download