Improvement of storage, handling, and transportability of fine coal. Quarterly technical progress report No. 4, October 1, 1994--December 31, 1994 Page: 43 of 73
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There was one other small rectangular UHMW PVC chute used in the circuit. It simply
surrounded the Mulled Coal stream where it dropped from the pug mill, through the floor and onto
the truck loading chute. One side of the chute was removable so that we could reach into the coal
stream from the project bay to take Mulled Coal quality control samples.
3.3.8 Access Design
Project equipment was to be located in four different bays which were stacked one on top of
the other. The screen bowl centrifuge was to be located in the top bay at elevation 476'-0. This bay
also contained concentrate lines and one end of the vacuum filter used to dewater Chetopa fine coal.
The centrifuge effluent drains and sampling ports for the project were located in the next bay down
at elevation 467'-0. This bay also contained the filter cake collecting belt and the vacuum filter drain
line. The main bay at elevation 458'-6 contained the reagent system, the surge feeder, the pug mill
and the control room. There was no Chetopa equipment in the main bay. The project haul truck
traveled in the open bay immediately beneath the main project bay. There was no other equipment
of any kind in this bay - it was an open roadway under the plant which was once used to load rail cars.
The successful operation of the project demanded quick and ready access between all of the
bays with project equipment. The demonstration circuit operator and EI technicians would routinely
be on the move between all of the project bays - especially between the control room and the outside
to check on the status of the truck loading. (The truck was not manned during loading, but it would
be necessary to advance the truck a few feet on three or four occasions during each loading.)
Prior to the start of the project, there was no quick way to get from the main project bay to
the two bays immediately above, and there was no way to get from the main bay outside to monitor
truck loading. In addition, the main personnel entrance to the Chetopa plant was over 100' from the
main bay, and since that bay was in a remote, unused corner of the plant, getting from the plant
entrance to the project bay required going up and down quite a few flights of stairs (Figure 18).
In order to provide fast access to all project equipment, we decided to incorporate two new
sets of steps into the Mulled Coal circuit. One set was a new outside personnel entrance from ground
elevation up to the control room, and the other connected the main bay to the one immediately above
(Figures 19 and 20). The steps, along with a new door into the plant, would make it possible for our
operators to travel from the slipstream take-off point to the haul truck in a matter of seconds.
There was no way to get the large pieces of project equipment (centrifuge, pug mill, surge
feeder, reagent drums and control panel) into the plant without cutting holes in the plant siding. At
the conclusion of the project, the equipment would have to be removed through the same openings.
Also, there would be a need from time to time to hoist additional drums of reagent up into the main
project bay. In order to get this equipment in and out, it would be necessary to open up the plant
siding at elevations 458'-6" and 476'-0".
Drummond felt that they would also be able to use the same openings to move their own
equipment and supplies in and out of the plant. It was decided that we would install permanent hoist
doors at the appropriate locations, and that the hoist beam would be located at the highest possible
plant elevation which was in line with the new hoist doors (Figure 19).39
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Improvement of storage, handling, and transportability of fine coal. Quarterly technical progress report No. 4, October 1, 1994--December 31, 1994, report, August 20, 1996; Pittsburgh, Pennsylvania. (https://digital.library.unt.edu/ark:/67531/metadc684132/m1/43/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.