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Preliminary control technology assessment of Day Mines, Inc., Leadville, Colorado.

Authors
Godbey FW
Source
Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, ECTB 111-16A, 1981 Sep; :1-5
NIOSHTIC No.
00182766
Abstract
An on site visit was made to Day Mines, Inc., (SIC-1031), Leadville, Colorado to evaluate control methods used in the beneficiation of lead ore. The facility processed about 400 tons of crude ore averaging about one half percent lead each day. The concentrator process was above ground and consisted of a grizzley, primary jaw crusher, and secondary gyro crusher which reduces the ore to less than 5/16 inch. A continuous belt conveyor carried the ore to the storage bin. Ore was mixed with water and fed to the grinding circuit, where it was ground in closed circuit with hydroclone classifiers. The flotation feed pulp was conditioned by automatically controlled reagent additions and processed through the lead recovery flotation circuit. Tailings were fed through a Reichert spiral wet gravity separator. The concentrate from each circuit flowed out where the pulp was thickened and pumped to a filter and dryer. The filtered dewatered concentrate was stored for further loading. A good housekeeping program existed at this facility and a formal health and safety training program was conducted. No specific engineering controls were used. The author recommends that this site not be used for an in depth study.
Keywords
NIOSH-Author; NIOSH-Survey; Field-Study; Region-8; Refineries; Dust-control; Control-methods; Control-technology
Publication Date
19810924
Document Type
Field Studies; Control Technology
Fiscal Year
1981
NTIS Accession No.
PB89-129779
NTIS Price
A01
Identifying No.
ECTB-111-16A
NIOSH Division
DPSE
Priority Area
Control-technology
SIC Code
1031
Source Name
National Institute for Occupational Safety and Health
State
CO; OH
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