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Title: Pelletizing/reslurrying as a means of distributing and firing clean coal. Final report

Abstract

Battelle-Columbus and Amax Research & Development conducted a program to develop a process to transport, handle, store, and utilize ultra-fine, ultra-clean (UFUC) coals. The primary objective was to devise a cost-effective method, based on conventional pelletization techniques, to transform the sludge-like filter cake produced in advanced flotation cleaning processes into a product which could be used like lump coal. A secondary objective was the production of a pellet which could be readily converted into a coal water fuel (CWF) because the UFUC coal would ultimately be used as CWF. The resulting product would be a hard, waterproof pellet which could be easily reduced to small particle sizes and formulated with water into a liquid fuel.

Authors:
Publication Date:
Research Org.:
Battelle, Columbus, OH (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
10106896
Report Number(s):
DOE/PC/90166-T8
ON: DE93005913
DOE Contract Number:
AC22-90PC90166
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 29 Sep 1992
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; PELLETIZING; FUEL SLURRIES; RHEOLOGY; PROGRESS REPORT; ABRASION; ECONOMICS; VISCOSITY; MOISTURE; TEMPERATURE EFFECTS; EXTRUSION; TRANSPORT; STORAGE; 010300; PREPARATION

Citation Formats

Conkle, H.N. Pelletizing/reslurrying as a means of distributing and firing clean coal. Final report. United States: N. p., 1992. Web. doi:10.2172/10106896.
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Conkle, H.N. Pelletizing/reslurrying as a means of distributing and firing clean coal. Final report. United States. doi:10.2172/10106896.
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Conkle, H.N. Tue . "Pelletizing/reslurrying as a means of distributing and firing clean coal. Final report". United States. doi:10.2172/10106896. https://www.osti.gov/servlets/purl/10106896.
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@article{osti_10106896,
title = {Pelletizing/reslurrying as a means of distributing and firing clean coal. Final report},
author = {Conkle, H.N.},
abstractNote = {Battelle-Columbus and Amax Research & Development conducted a program to develop a process to transport, handle, store, and utilize ultra-fine, ultra-clean (UFUC) coals. The primary objective was to devise a cost-effective method, based on conventional pelletization techniques, to transform the sludge-like filter cake produced in advanced flotation cleaning processes into a product which could be used like lump coal. A secondary objective was the production of a pellet which could be readily converted into a coal water fuel (CWF) because the UFUC coal would ultimately be used as CWF. The resulting product would be a hard, waterproof pellet which could be easily reduced to small particle sizes and formulated with water into a liquid fuel.},
doi = {10.2172/10106896},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Sep 29 00:00:00 EDT 1992},
month = {Tue Sep 29 00:00:00 EDT 1992}
}
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Technical Report:
View Technical Report (13.34 MB)
DOI:  10.2172/10106896
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  • ; ; ; ...
    The objective of this study is to develop technology that permits the practical and economic preparation, storage, handling, and transportation of coal pellets, which can be reslurried into Coal water fuels (CWF) suitable for firing in small- and medium-size commercial and industrial boilers, furnaces, and engines. The project includes preparing coal pellets and capsules from wet filter cake that can be economically stored, handled, transported, and reslurried into a CWF that can be suitably atomized and fired at the user site. The wet cakes studied were prepared from ultra-fine (95% -325 mesh) coal beneficiated by advanced froth-flotation techniques. The coalsmore » studied included two eastern bituminous coals, one from Virginia (Elkhorn) and one from Illinois (Illinois No. 6) and one western bituminous coal from Utah (Sky Line coal).« less

  • ; ; ; ...
    The objective of this study is to develop technology that permits the practical and economic preparation, storage, handling, and transportation of coal pellets, which can be formulated into Coal-Water Fuels (CWFs) suitable for firing in small- and medium-size commercial and industrial boilers, furnaces, and engines.

  • The objective of this study is to develop technology that permits the practical and economic preparation, storage, handling, and transportation of coal pellets, which can be reslurried into Coal water fuels (CWF) suitable for firing in small- and medium-size commercial and industrial boilers, furnaces, and engines. The project includes preparing coal pellets and capsules from wet filter cake that can be economically stored, handled, transported, and reslurried into a CWF that can be suitably atomized and fired at the user site. The wet cakes studied were prepared from ultra-fine (95% -325 mesh) coal beneficiated by advanced froth-flotation techniques. The coalsmore » studied included two eastern bituminous coals, one from Virginia (Elkhorn) and one from Illinois (Illinois No. 6) and one western bituminous coal from Utah (Sky Line coal).« less

  • This volume contains appendices for: atomization test report; cost estimation model--pelletization material balance and equipment selection; cost estimation model--pelletization capital investment estimates; cost estimation--pelletization operating cost estimates; cost estimation model--pellet-CWF formulation material balance and equipment selection; cost estimation model--pellet-CWF capital investment estimates; cost estimation model--pellet-CWF operating cost estimates; and cost estimation model--direct CWF operating cost estimates.

  • Work in this quarter focused on completing (1) the final batch of pilot-scale disk pellets, (2) storage, handling, and transportation evaluation, (3) pellet reslurrying and atomization studies, and (4) cost estimation for pellet and slurry production. Disk pelletization of Elkhorn coal was completed this quarter. Pellets were approximately 1/2- to 3/4-in. in diameter. Pellets, after thermal curing were strong and durable and exceeded the pellet acceptance criteria. Storage and handling tests indicate a strong, durable pellet can be prepared from all coals, and these pellets (with the appropriate binder) can withstand outdoor, exposed storage for at least 4 weeks. Pelletsmore » in unexposed storage show no deterioration in pellet properties. Real and simulated transportation tests indicate truck transportation should generate less than 5 percent fines during transport. Continuous reslurrying testing and subsequent atomization evaluation were performed this quarter in association with University of Alabama and Jim Walter Resources. Four different slurries of approximately 55-percent-solids with viscosities below 500 cP (at 100 sec{sup {minus}1}) were prepared. Both continuous pellet-to-slurry production and atomization testing was successfully demonstrated. Finally, an in depth evaluation of the cost to prepare pellets, transport, handle, store, and convert the pellet into Coal Water Fuel (CWF) slurries was completed. Cost of the pellet-CWF option are compared with the cost to directly convert clean coal filter cake into slurry and transport, handle and store it at the user site. Findings indicate that in many circumstances, the pellet-CWF option would be the preferred choice. The decision depends on the plant size and transportation distance, and to a lesser degree on the pelletization technique and the coal selected.« less