Re: Lignite Bulk Density
Dear Mr. Tedsandy,
People in lignite based power station or the people concerned with lignite mines would be the right people to give you specific answer.
As for the Indian lignite, the Indian standard specifies lignite density as below :
Lignite air dried : 722 - 880 kg/cu. m
Lignite raw / heavy : 900 - 960 kg/cu. m
Germany is extensively dealing with lignite. One German publication mentions following bulk densities :
Lignite dry : 500 - 900 kg/cu. m
Lignite, wet : 900 kg/cu. m
Your first statement regarding bulk density of 1.4 t/cu m for wet lignite looks to be on higher side. The lignite is primarily made from wood. The wood density is less than 1 gm/cc. The water density is 1 gm/cc. Therefore, mixture of these two items cannot create bulk density more than 1000 kg/cu. m.
The higher density will only be possible if there is large-scale mixture of earthen / overburden material, but then will it be commercially usable lignite for power generation and such important activities.
Regards,
Ishwar G Mulani.
Author of Book : Engineering Science and Application Design for Belt Conveyors.
Author of Book : Belt Feeder Design and Hopper Bin Silo
Advisor / Consultant for Bulk Material Handling System & Issues.
Email : parimul@pn2.vsnl.net.in
Tel.: 0091 (0)20 25882916 ■
Lignite Bulk Density
Hello,
Does anyone have specific lignite bulk densities?
I'm looking for densities:
A) in a stock pile after coming off a railroad wagon. i.e. as recieved with roughly 35% moisture. My guess is 1.4 t/cu.m
B) after being dried to roughly 8-10% moisture with particle size around 6 mm. My guess is 0.8 t/cu.m
C) After the dried lignite is crushed to roughly 100 microns, i.e. powder lignite. My guess is 0.6 t/cu.m
I understand that lignite is less dense than say bitumous coal or anthracite, which I already have info for.
Thanks for your help. ■