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Propose and Evaluate Methods of Controlling Mercury Vapor Emissions in a Processing Mill Furnace Room.

Authors
Bartlett-PT; Muldoon-TL
Source
NTIS: PB/83-171751 :115 pages
Link
NIOSHTIC No.
10002760
Abstract
The objective of this program was to develop cost-effective methods of controlling mercury vapor in a processing mill furnace room with particular emphasis on the McDermitt mercury mill in Nevada. Process, environmental, and operating data were collected at McDermitt and a preliminary evaluation of control systems was performed. Efforts were focused on the furnace, which is the primary mercury emission source, and furnace positive pressure or "blowback," which is the cause of the greatest furnace emissions. Cost-effective conceptual design alternatives were prepared that addressed the identified emissions problems, particularly furnace blowback. Two designs were selected and detailed design drawings and cost estimates were prepared. The first design agglomerates the filter cake upstream of a belt conveyor, which replaces the existing screw conveyor. The second design dries the filter cake to 5 percent moisture before conveyance on the belt conveyor. Both designs are expected to reduce mercury vapor concentrations by more than 500 ug/m3 in the furnace building and approximately 160 ug/m3 in the concentrator building during furnace operations.
Publication Date
19820101
Document Type
CP; Final Contract Report;
Fiscal Year
1982
NTIS Accession No.
PB83-171751
NTIS Price
A07
Identifying No.
OFR 44-83
NIOSH Division
PRC;
Source Name
NTIS: PB/83-171751
State
NV;
Performing Organization
Foster-Miller Assoc. Inc.
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