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Information about Respirators

Published on January 22, 2008

Author: Marco1


Respirators and Dust Hazards:  Respirators and Dust Hazards Commonwealth of Pennsylvania Department of Environmental Protection Bureau of Deep Mine Safety Slide2:  What is Dust? How is Dust generated? What types of Dust are there? Why is Dust Control necessary? What are the Health Hazards of Dust? How can Dust be controlled? Introduction Slide3:  One Micron-Size Dust Particle on a Pin Head What is Dust? Slide4:  When Ore is Broken by: Impact Abrasion Crushing Grinding What ore sizing equipment do you have at your work site? How is Fresh Dust Generated? Slide5:  Release of previously generated dust during such processing operations as: Loading Dumping Transferring What types of Loading, Dumping, or Transferring Equipment do you have? How is Dust Recirculated? Slide6:  Also, dust can be recirculated by: Wind Movement of Workers Movement of Equipment What activities or conditions kick up dust at your mine? How is Dust Recirculated? Slide7:  Fibrogenic Dust (Causes Disease) Crystalline Silica (Quartz) Asbestos Beryllium Nuisance Dust - Dust that does not contain harmful quantities of asbestos & less than 1% quartz. Dust Classification Slide8:  Dust is classified by size into two primary categories. Respirable Dust Inhalable Dust Dust Classification by Size Slide9:  Dust that enters the body, but is trapped in the nose, throat, and upper respiratory tract. Inhalable Dust Slide10:  Dust particles small enough (less than 10 Microns) to penetrate past the upper respiratory tract and deep into the lungs. Respirable Dust Percent of Particles going deep into the Lungs Slide11:  Dust & the Respiratory System Human Respiratory System Slide12:  Health Hazards Occupational respiratory diseases Irritation to eyes, nose, throat Skin irritation Damage to Equipment Impaired Visibility Community Relations Can you think of other reasons? Why Control Dust? Slide13:  The harm Dust can cause depends on the following: Dust Composition Dust Concentration Particle Size and Shape Amount of Exposure Time Excessive exposure to harmful dusts can cause Pneumoconiosis - a dust related lung disease. Health Hazards Slide14:  Silicosis Caused by Silica Dust Black Lung Caused by Coal Dust Asbestosis Caused by Asbestos Dust Damage from these diseases is irreversible! Dust Related Lung Diseases Slide15:  Fully enclosing dusty processes. Local exhaust ventilation/dust collection equipment. Tools with dust extraction (vacuum) devices. Using water to suppress dust. Operator enclosures with an air filtration system. Use abrasives other than sand for abrasive blasting. Controling Dust Exposure - Safer Machinery & Tools Slide16:  Dust Control Systems Slide17:  Dust Control Systems Slide18:  Wetting down dusty work areas or processes prior to work. Working upwind of dust sources where possible. Posting warning Signs where necessary. Limiting Exposure time. Training all employees on appropriate work procedures. Good housekeeping practices. Controling Dust Exposure - Safe Work Procedures Slide19:  Fit testing of all employees required to wear respiratory devices. Training employees in the proper use of respiratory devices. Making sure employees understand the hazards of dust and the importance of respirator use. Regular checking and cleaning of non-disposable respirators. Controling Dust Exposure - Respiratory Protection Slide20:  Certain Breathing conditions are hazardous to life and lung. The air can be contaminated with: Dusts, Mists, Fumes Toxic Vapors The air can have too little oxygen. Reasons for Respirators? How do we control these Airborne Hazards?:  How do we control these Airborne Hazards? First - Use Engineering Controls to eliminate the hazard. Second - Use Administrative Controls to reduce exposure to the hazard. Last - Use Respirators as a temporary protective measure until Engineering and Administrative Controls are in place. 2 Basic Types of Respirators:  2 Basic Types of Respirators Air Purifying Respirators Used to filter out or neutralize contaminants Examples: Dust; Organic Vapor Air Supply Respirators Used when there is a lack of oxygen, when the hazard is unknown or is undetectable by smell or taste. Examples: Compressor & Hose; SCBA Filtering Respirators:  Filtering Respirators Particulates - Dusts, Mists & Fumes New Classes; N, R, P; 95, 99, 100 Non-Resistant(Oil), Resistant(Oil), (Oil) Proof Toxins - Organics, Acids, etc. Neutralizing or Absorbing Filtering Respirators are Hazard Specific Don’t expect one respirator to protect you from all hazards! How long do Respirators last?:  How long do Respirators last? Particulate (Dust) Filtering Respirators Change them when the breathing resistance gets high. Toxin Filtering Respirators Change when you first smell or taste a contaminant (Break-through) Health Conditions that Interfere with Respirator Use:  Health Conditions that Interfere with Respirator Use Heart Conditions Asthma or other breathing problem Claustrophobia (fear of enclosed space) Missing Teeth Other Conditions that can Interfere with Respirator Use:  Other Conditions that can Interfere with Respirator Use Contact Lenses Eyeglass Temples (certain types) Skullcaps (Beanies) Respirators Used at Your Workplace:  Respirators Used at Your Workplace How to don your respirator. Look at the manufacturer’s instructions. How to clean & Maintain your respirator. Look at the manufacturer’s instructions. How to Self-Fit Test your respirator. Not possible with Filter-Face Types Look at the manufacturer’s instructions. Slide28:  Silicosis is a disease whose effects can be reversed, given time. True False Quiz Slide29:  Dust respirator masks are not the preferred protection from dust because: A. They can leak if not fitted properly. B. They are uncomfortable to wear. C. They cost very little. D. Both A & B Quiz

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