Indepth Survey Report CT-144-21A, Macawber Engineering, Inc., Maryville, Tennessee

摘要

An indepth survey of control technology for reducing limestone (1317653) exposure during bag opening operations at Macawber Engineering, Incorporated (SIC-3535), Maryville, Tennessee was conducted in April, 1984. The ability of an automatic bag slitter to open bags of very fine limestone (mass median diameter less than 4.0 micrometers) without becoming a dust emission source was evaluated. Total and respirable dust concentrations before and during bag slitting operations were measured under the bag disposal chute, above the bag disposal tube, at the outlet of the automatic unbagger, next to the bellows, or at a position next to the storage bins. The author suggests that the bag slitter leaks dust. As tested, the automatic bag opening machine is probably suitable only for handling relatively nontoxic dusts.