Mine safety

Continuous monitoring for the presence of fluorine gas in the workplace may be accompHshed using detectors available from Mine Safety Apphances (Pittsburgh, Pa.) or FIT (Exton, Pa.). 

Coal-Mine Dusting. A steady market for pulverized limestone is ia dusting coal mines with a noncombustible mineral dust as a federally mandated mine safety requirement. Of aU mineral dusts, limestone is by far the most commonly used (60—75% 0.074 mm (200 mesh)). Consumption ia 1991 was... 

Mica mining is subjected to local, state, and federal laws. The Mining, Safety and Health Administration (MSHA) regularly monitors mica mining operations for safety violations. 

The large candles used by the U.S. Navy have been produced ia the United States by three companies. Mine Safety AppHances Company, Puritan-Beimett Corporation, and Scott Aviation. These sell for 50— 60. Production is less than 10,000/yr. Smaller candles incorporated ia breathing apparatus are produced by equipment suppHers. Production quantities are tied to the number of complete units and the candles are a small percentage of the total price. Production for aircraft oxygen supply during a decompression incident is about 50,000 units per year. In the United States, Puritan-Beimett and Scott Aviation are the primary suppHers as is Draeger in Germany. 

Mine Safety AppHances Company, USA (MSA) developed a reduction process usiag sodium and KCl to produce potassium metal ia the 1950s (4) ... 

Total U.S. production of potassium metal is less than 500 t/yr. There are few commercial producers worldwide, although some companies produce potassium captively. The more prominent producers are CaHery Chemical Company (a division of Mine Safety AppHances Company) in the United States and the People s RepubHc of China. Potassium may be manufactured in Russia as well. Strem Chemicals (U.S.) suppHes small quantities in ampuls. 

Historically, potassium metal was used by the Mine Safety AppHances Company (parent company of Gallery Chemical Company) to develop potassium superoxide [12030-88-5] oxygen source in self-contained breathing equipment (see Oxygen-GENERATION systems). Greater understanding... 

Talc is considered a nuisance dust and subject to regulation in the workplace by both the Occupational Health and Safety Administration and the Mine Safety and Health Administration. Eight-hour exposure limits for talc dust are two milligrams of talc per cubic meter. 

Diborane(6), B2H. This spontaneously flammable gas is consumed primarily by the electronics industry as a dopant in the production of siHcon wafers for use in semiconductors. It is also used to produce amine boranes and the higher boron hydrides. Gallery Chemical Co., a division of Mine Safety AppHances Co., and Voltaix, Inc., are the main U.S. producers of this substance. Several hundred thousand pounds were manufactured worldwide in 1990. 

In India, the Central Mining Research Institute, Dhanbad carries out this testing and provides the necessary certilication for motors used iti explosive atmospheres. But for approval of the equipment, whether it is worthy of use in a particitlar hazardous area, there are accredited agencies.. Some of these are Directorate General Mines Safety. Dhanbad, Chief Controller of Explosives. Nagpur and Directorate General of Factory Advice Service and Labour Institute. Bonibav. 

US Department of Labor, "System Safety Engineering , Safety Manual No. 15, Mine Safety and Healtli Administration, Waslungton, D.C., 1982. 

Potassium ferf-butoxide was supplied by Mine Safety Appliances (MSA) Research Corporation. 

Oxalate Blasting Powders. Mining safety expls invented in Eng) by Greaves and Hann in 1897— 98 and manufd by the Oxalate Blasting Powder Co at Gatebeck (Westmoreland), which later became the Nitrates Explosives Co, Ltd. These expls were a modification of BlkPdr in which sulfur was partially or entirely replaced by one or more of the following oxalic acid, oxalates of Aram, K or Na (simple or double), borax, boric acid, etc, each of which could contain w of hydration. The purpose of these substitutions was to obtain expls with a cool flame, so that they could be safely used in gaseous mines Refs 1) Daniel (1902), 592-3 2) Cond-... 

Round Robin No 30 of the ICRPG Working Group on Analytical Chemistry Particle Size Analysis of Nominal 20- to 30-Micron Ammonium Perchlorate with the Mine Safety Appliances Analyzer", RK-TR-69-13 (1969) 40) R.A. Dobbins L.D. Strand, AIAA Joum 8, 1544 (1970) 41) R.W. Hutchinson, Use of... 

The National Institute for Occupational Safety and Health (NIOSH) conducts research on occupational diseases and injuries, responds to requests for assistance by investigating problems of health and safety in the workplace, recommends standards to the Occupational Safety and Health Administration (OSHA) and the Mine Safety and Health Administration (MSHA), and trains professionals in occupational safety and health. Contact NIOSH, 200 Independence Avenue, SW, Washington, DC 20201 Phone 800-356-4674 or NIOSH Technical Information Branch, Robert A. Taft Eaboratory, Mailstop C-19, 4676 Columbia Parkway, Cinciimati, OH 45226-1998 Phone 800-35-NIOSH. 

Potassium 2-but oxide was obtained from Mine Safety Appliances Corp. 

A Type 10 enclosure is designed to meet the explosion proof requirements of the U.S. Mine Safety and Health Administration (MSHA). It is suitable for use in gaseous coal mines. 

Two examples of air purifying respirators are the MSA Ultra-Twin full-face respirator (Mine Safety Appliances Company [MSA], Pittsburgh, PA), and the 3M Model 6800 full-face mask (3M, St. Paul, MN). Figure 6.7 shows an air-purifying respirator. 

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