SELF RESCUER.pptx
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A self rescuer is a simplified gas mask that miners use in coal mines. Weighing about 1 kg, it contains chemicals like manganese dioxide and copper oxide that convert carbon monoxide (CO) gas into carbon dioxide (CO2). CO is poisonous and odorless. The self rescuer allows miners to breathe for one hour after its seal is broken in an atmosphere with 1% CO concentration. It is used when smoke, combustion gases, or unexpected dust are detected as signs of fire or explosion.
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SELF RESCUER.pptx
- 1. SELF RESCUER Presented By :- Sidhartha Sourav Nayak Reg. No-200301190007 Mine Environment and Hazards S U B M I T T E D T O : - A R U N S I R
- 2. Self rescuer is essentially gas mask in a simplified form without the corrugated hose tubing. Its weight is low, nearly 1 kg. The chemical are manganese dioxide & copper oxide, is used as a catalyst which changes CO to CO2. CO is a poisonous gas & also colorless & odourless. Basically it is used in degree 3 mines It can’t use for breathing operation.
- 3. The fig 1.1 shows a miner with the rescuer on
- 4. Use of self rescuer Self-rescuers are for use in environments such as coal mines where there is a risk of fire or explosion, and in a location where no external rescue may be available for some time The main hazard here is from large quantities of carbon monoxide or white damp, often produced by an explosion of firedamp. A miner should don the rescuer immediately on seeing
- 5. 1-clouds of smoke 2-smell of combustion gases 3-unexpected dust Self rescuers are stored on the surface in the lamp room or in a self rescuer room adjacent to the lamp room . Worker are pick up the lamp & self rescuer at the same time when going down the mines.
- 7. In IW-65,calcium bromide & lithium chloride(53% CaBr2 & 5% LiCl) are used for drying agent in charcoal. The Co catalyst is hopcalite used for conversion of co to co2. This conversion generate heat in reaction. The filter section has an outer coarse dust filter & an inner fine dust filter to remove dust particles. The self rescuer can be used for one hour after its seal is broken in atomsphere of 1% CO.