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Anonymous Poster	Coal 02/22/2008 3:28 AM
	sir , what is the density of coal ? coal size: +10mm=15.4 % -10 to +6mm=14.6% -6 to 1 mm=42.8% -1mm=27.2% the above figures are taken from 100% coal sample
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#1 Re: coal 02/22/2008 4:36 AM
	A) You have made no mention of the grade of coal. B) Rather than doing lots of complicated sums, giving an estimate which may or may not be anywhere near the correct answer (the shape of the fragments, for instance, will affect the packing density), why not take a known volume, and weigh it? __________________ "Love justice, you who rule the world" - Dante Alighieri
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ddk Guru Join Date: Jul 2007 Location: Minnesota Posts: 529 Good Answers: 15	#2 Re: coal 02/22/2008 8:09 AM
	You could look in some reference books. Screw conveyor catalogs used to have this information in them. __________________ downhill slide to 112 (damn memor.)
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TVP45 Guru Join Date: Jul 2007 Posts: 4448 Good Answers: 143	#3 Re: Coal 02/22/2008 11:40 AM
	Wilkesbarre anthracite lump weighs 69.4 lb per cu. ft. __________________ "Well, I've wrestled with reality for 35 years, Doctor, and I'm happy to state I finally won out over it." Elwood P. Dowd
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leveles Guru Join Date: Jan 2008 Posts: 1753 Good Answers: 59	#4 Re: Coal 02/23/2008 3:06 PM
	It is simple. You take a big enough lump of coal. You fill a pot exactly full with water. Lower the coal gently into it. Catch the water displaced = exact volume. Weigh the coal = exact weight. Divide = exact specific weight.
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JohnDG Guru Join Date: May 2006 Location: Reading, Berkshire, UK. Going under cover. Posts: 9684 Good Answers: 468	#5 In reply to #4 Re: Coal 02/23/2008 3:56 PM
	But unless our Guest was wasting his time telling us about the distribution of particle sizes, he wants to know the average density of his aggregate of assorted bit of coal. __________________ "Love justice, you who rule the world" - Dante Alighieri
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#6 Re: Coal 02/25/2008 11:53 AM
	Refer to Kempe's Engineers' Year Book 1988, part 1, section F2. Pages and pages of tabulated information! __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Users who posted comments:

ddk (1); JohnDG (2); leveles (1); PWSlack (1); TVP45 (1)

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