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Title: Characteristics of pneumatically-emplaced dry flue gas desulfurization materials

The University of Kentucky in collaboration with the Department of Energy, Addington, Inc. and Costain Coal is currently developing a commercial concept for the haul back of dry flue gas desulfurization materials (FGDM) into highwall mine adits. The University`s Center for Applied Energy Research (CAER) is investigating emplacement systems for a mine demonstration which is planned for the third quarter of 1996. A laboratory-scale transport system has been built at the CAER to evaluate the potential of pneumatic transport for FGDM emplacement. The system is modeled after shotcreting systems in which water is mixed with cement (FGDM) in a nozzle at the end of the pneumatic pipe. Solids travel approximately 70 ft in the lab-scale system at a rate of up to 6 lb FGDM/minute prior to impingement onto a sample collector. Prehydrated FGDM from a circulating fluidized bed combustor has been successfully emplaced onto vertically positioned sample surfaces without excessive dust liberation. The test program is focussed on determining the pneumatic conditions necessary to maximize the strength of the emplaced FGDM under anticipated mine curing conditions while minimizing dust formation. The mineralogy and strength of a pneumatically created sample are described following curing for 60 days.
Authors:
; ; ;  [1]
  1. Univ. of Kentucky, Lexington, KY (United States) [and others
Publication Date:
OSTI Identifier:
430281
Report Number(s):
CONF-960376-
Journal ID: ACFPAI; ISSN 0569-3772; TRN: 97:000004-0009
DOE Contract Number:
FC21-93MC30251
Resource Type:
Journal Article
Resource Relation:
Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; Journal Volume: 41; Journal Issue: 2; Conference: Spring national meeting of the American Chemical Society (ACS), New Orleans, LA (United States), 24-28 Mar 1996; Other Information: PBD: 1996
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 36 MATERIALS SCIENCE; FLUE GAS; DESULFURIZATION; FLY ASH; WASTE PRODUCT UTILIZATION; MECHANICAL PROPERTIES; COAL; MOISTURE; CURING; MINERALOGY; COAL MINES