'A small portion of the hot ash-laden gas stream entering the turbine is continuously removed by this ash-sampling unit. Data from the operation of this unit is analyzed to determine the concentration, size, and composition of the ash in the hot gases entering the turbine.'
Coal crushed to 3/16-inch by 0 is pumped to a pulverizer that grinds it to 90-per cent hrough 200-mesh. The product is mixed with air and burned in the combustors. Hot high-speed gas from the ash separators drives the turbine, air compressor, and electric generators. Exhaust from the turbine passes through a regenerator that preheats compressed air to the combustors. If used, please credit Bureau of Mines, U.S. Department of the Interior.
This mock-up shows the new blade design being tested by the Bureau of Mines. The base of the blade is thicker and there is a strip of titanium carbide at the point of previous severe erosion. If used, please credit Bureau of Mines, U.S. Department of the Interior.During LDC's final 1,100-hour run, this rotor blade (arrow) was undercut by ash flowing along the rotor past the tips of the stator blades. If used, please credit Bureau of Mines, U.S. Department of the Interior.
This mock-up shows the new blade design being tested by the Bureau of Mines. The base of the blade is thicker and there is a strip of titanium carbide at the point of previous severe erosion. If used, please credit Bureau of Mines, U.S. Department of the Interior.During LDC's final 1,100-hour run, this rotor blade (arrow) was undercut by ash flowing along the rotor past the tips of the stator blades. If used, please credit Bureau of Mines, U.S. Department of the Interior.
1-Mining machine, electrically operated, 2. Electric locomotive and coal car train leaving mine, 3. Shaker screen for sorting coal according to size, 4. Coal powerhouse and tipple.
Steel Mine Car at One of the White Oak Shaft Mines
Description:
'All ready-Hoist! This is an end view of one of our new steel mine cars on a cage at one of the White Oak Shaft mines, and the signal has just been given to hoist it to the surface--450 feet up! These electric equipped hoists can hoist a car every twenty seconds and dump it! The cars are placed on the cages automatically by creeper chains and car stops. One man operates the signals and car stops and chains.'
'Coal at all White Oak shafts mines is handled on self dumping cages, which handle the coal uniformly and with a minimum of breakage. Note how evenly the coal is flowing from the mine car. Much more rapid of course than the picture indicates, but it shows how well designed the equipment must be to handle the coal in such splendid manner.'
Interior of a Coal Mine with Roof Supports Along Longwall Face
Description:
'Modified longwall mining with a German coal planer. Progress report 2: Completion of mining in three adjacent panels in the Pocahontas no. 4 coal bed, Helen, W. Va.' Please give credit to the Bureau of Mines, United States, Department of Interior.
Permission is granted to reproduce this photograph only on condition that each reproduction shall bear the following credit line: Photograph by Norfolk and Western Railway.
Longwall Face Showing Armored Conveyor, Planer, and Roof Supports
Description:
Modified Longwall Mining with a German Coal Planer. Progress Report 2: Completion of mining in three adjacent panels in the Pocahontas No. 4 coal bed, Helen, W. Va; Please give credit to Bureau of Mines, United States, Department of Interior.
Modified longwall mining with a German coal planer. Progress report 2: Completion of mining in three adjacent panels in the Pocahontas No. 4 coal bed, Helen, W. Va; If this photograph is used for publication, please give credit to the Bureau of Mines, United States Department of Interior.
'Loading [sic] from heading to face conveying on 9% grade to boom, coal wet; distance to face 174 feet; flight type boom; Note: up until the time of taking pictures A-1-A-2-3&4 no jacks were set to support conveyor or drive.'
Conveyor Belt at Truax Traer Coal Company, Elkville IL
Description:
This is written on the back of the photo: 'Junction point two (2) 30"x1200' Conveyors Truax Traer Company, Elkville now used in Cabin Creek mines in West Virginia'
!['Loading [sic] from heading to face conveying on 9% grade to boom, coal wet; distance to face 174 feet; flight type boom; Note: up until the time of taking pictures A-1-A-2-3&4 no jacks were set to support conveyor or drive.'](/thumb/002762.jpg "Coal on Conveyor at Thomas, W. Va.")
