Mining

Best Practices for Dust Control in Metal-Nonmetal Mining by Jay F. Colinet, Andrew B. Cecala, Gregory J. Chekan, John A.

By Jay F. Colinet, Andrew B. Cecala, Gregory J. Chekan, John A. Organiscak, Anita L. Wolfe, Department of Health and Human Services Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health

Compiled by means of the U.S. Dept of well-being and Human companies, CDC/NIOSH place of work of Mine security and healthiness study, this 2010 instruction manual used to be built to spot to be had engineering controls that could help underground and floor metal/nonmetal mining operations in lowering employee publicity to respirable silica dirt. The controls mentioned during this instruction manual diversity from long-used controls that have built into criteria, to more recent controls, that are nonetheless being optimized

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In many cases, water sprays located on the top (wetting the product) and the bottom (reducing dust from the idlers) at the same application point can be an effective strategy [Courtney 1983; Ford 1973]. These locations are also beneficial from an installation and cost standpoint. When considering nozzle type for these suppression systems, fan spray nozzles are normally the most common design because they minimize the volume of water added for the amount of coverage. , the dump or 32 transfer location), because as the water and ore continually mix together, the amount of wetted surface area of the ore increases, thus increasing the suppression potential and reduction in dust liberation.

Any outside dust sources, such as bulk loading near an air inlet location, can cause outside dust-laden air to be drawn into the plant and make the problem worse. It is critical to ensure that the make-up air is clean by controlling the air’s entry location through inlets such as wall louvers, plants doors, or other openings. • Effective upward airflow pattern. The TMVS should provide an effective upward airflow pattern that ventilates the entire plant and also sweeps through dust sources, 41 work areas, and dust-laden areas.

Automated systems. A number of manufacturers have been making advances in automated equipment that mechanically takes 50- or 100-pound bags, loads them onto fill spouts, then ejects the bags once they have reached the desired bagging weight. Normally, the bag loading area is sealed with plastic stripping to isolate it. This area is connected to an LEV system and kept under slight negative pressure to capture and remove respirable-sized dust particles liberated during the bag loading process. Bag Conveying • Bag and belt cleaning devices.

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