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Noise Abatement of Vibrating Screens. Using Non-metallic Decks and Vibration Treatments.

Authors
Hennings-K
Source
NTIS: PB/82-251919 :63 pages
Link
NIOSHTIC No.
10002577
Abstract
Noise from vibrating screens is generated in two ways: (1) noise due to the material being processed, and (2) noise from the screen itself. Non-metallic decks have reduced material noise. The noise reduction and change in screening performance was quantified for six nonmetallic decks using dolomite, granite, and coal as the materials. The nonmetallic decks were from 2 to 7 dba quieter and from -1 to +10 percent less efficient compared with a steel wire cloth deck of the same open area. Damping the sidewalls and isolating the drive mechanisms has reduced the noise in the screen itself. Tests of four prototype damping treatments gave reductions up to 4.9 Dba, and the mechanism isolators gave an additional reduction of 2.1 Dba. Laboratory tests were conducted on samples of the treatments in a corrosive salt spray to simulate coal plant wash water up to 25,000 hours, and full-size treatments were run on a full-size screen for 5,000 hours.
Publication Date
19800101
Document Type
CP; Final Contract Report;
Fiscal Year
1980
NTIS Accession No.
PB82-251919
NTIS Price
A05
Identifying No.
OFR 120-82
NIOSH Division
PRC;
Source Name
NTIS: PB/82-251919
Performing Organization
Allis-chalmers Corp.
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