Coal workers' pneumoconiosis (CWP) is an occupational disease (type of pneumoconiosis) caused by exposure to coal dust free of silica (washed coal). Histologically, CWP is classified according to disease severity into simple (presence of coal macules) and complicated (with progressive massive fibrosis ) 3,7 .

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Anthracite is considered the cleanest burning coal available. It produces more heat and less smoke than other coals and is widely used in handfired furnaces. Some residential home heating stove systems still use anthracite, which burns longer than wood.

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Coal is a flammable black hard rock used as a solid fossil fuel. It is mainly made up of 6595% carbon and also contains hydrogen, sulphur, oxygen and nitrogen. It is a sedimentary rock formed from peat, by the pressure of rocks laid down later on top. The harder forms of coal, such as anthracite,...

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Abstract. Coal is a black, inhomogeneous, organic fuel, formed largely from partially decomposed and metamorphosed plant materials. Formation has occurred over long time periods, often under high pressures of overburden and at elevated temperatures. Differences in plant materials and in their extent of decay influences the components present in...

Also called coal workers' pneumoconiosis, black lung disease begins when the body's immune system tries to rid itself of small particles of coal dust lodged in the lungs. It's a complex process, but essentially the scavenger white blood cells (called macrophages) .

black coal classification ipowercontrolin. Black Wikipedia Black is the darkest color, the result of the absence or complete absorption of visible lightIt is an achromatic color, literally a color without hue, like white (its opposite) and gray (its median) Module 2: Solid Fossil Fuel (Coal) Lecture 7: Coal,

May 25, 2019· Bituminous coal is black, hard and usually dull to glossy in appearance. Still greater heat and pressure yields anthracite, the highest grade of coal. In the process, the coal releases methane or natural gas. Anthracite, a shiny, hard black stone, is nearly pure .

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four main types coal in india What are the four main types of coal found in India? (i) Anthracite: It is the highest quality hard coal. It is found in parts of Jammu and Kashmir. » More; FAQ Coal India Limited. Q6. What are the benefits of E Auction: benefits are briefly stated as under Total transparency in coal ...

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