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Title: Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning

Abstract

In May 1988, the Pennsylvania Electric Company (Penelec) and New York State Electric and Gas Corporation (NYSEG) were awarded a contract from the Department of Energy's Pittsburgh Energy and Technology Center (DOE-PETC) to evaluate the performance of a two-inch Air-Sparged Hydrocyclone (ASH) for cleaning fine minus-100-mesh coal. A 24-month study was successfully completed, optimizing the performance of the ASH for cleaning raw classified, naturally-occurring minus-100-mesh Upper Freeport coal, and comparing its performance with Advanced Froth Flotation (AFF), a procedure utilizing conventional flotation equipment operated in an advanced manner (low impeller speeds, starvation float, multiple-stage cleaning, etc.) with highly selective reagents to optimize ash and pyritic sulfur rejection. The economics of cleaning fine coal by both processes at commercial scale, for retrofit and greenfield applications were found to be comparable within the accuracy of the study. Technical performance of the two processes were also found to be essentially identical. Thus, the ASH would be the best choice for a retrofit installation into an existing plant because of requiring less space. Both processes were successful in achieving excellent separations when cleaning the Upper Freeport coal. Both the ASH and AFF circuits were able to produce a clean-coal product of yield (65--80 percentmore » weight recovery) and quality (5--6 percent ash) equivalent to that as theoretically determined by float-sink washability analyses. Combining either of the two fine coal flotation processes with a classifying cyclone circuit resulted in pyritic sulfur rejection values of about 85 percent. 47 refs., 109 figs., 75 tabs.« less

Authors:
 [1]; ;  [2];  [3];  [4];  [5]
  1. Pennsylvania Electric Co., Johnstown, PA (USA)
  2. Management and Technical Systems, McMurray, PA (USA)
  3. Davy Dravo (USA)
  4. Utah Univ., Salt Lake City, UT (USA)
  5. Ebasco Services, Inc., New York, NY (USA)
Publication Date:
Research Org.:
Pennsylvania Electric Co., Johnstown, PA (USA); Management and Technical Systems, McMurray, PA (USA); Davy Dravo (USA); Utah Univ., Salt Lake City, UT (USA); Ebasco Services, Inc., New York, NY (USA)
Sponsoring Org.:
DOE/FE
OSTI Identifier:
6581547
Report Number(s):
DOE/PC/88853-T2
ON: DE90016410
DOE Contract Number:  
AC22-88PC88853
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; COAL; CLEANING; CYCLONE SEPARATORS; PERFORMANCE; ASH CONTENT; COAL PREPARATION; COMPARATIVE EVALUATIONS; ECONOMICS; FLOTATION; PROGRESS REPORT; PYRITE; RETROFITTING; SULFUR CONTENT; CARBONACEOUS MATERIALS; CHALCOGENIDES; CONCENTRATORS; DOCUMENT TYPES; ENERGY SOURCES; EQUIPMENT; FOSSIL FUELS; FUELS; INERTIAL SEPARATORS; IRON COMPOUNDS; IRON SULFIDES; MATERIALS; MINERALS; POLLUTION CONTROL EQUIPMENT; SEPARATION EQUIPMENT; SEPARATION PROCESSES; SULFIDE MINERALS; SULFIDES; SULFUR COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; 010300* - Coal, Lignite, & Peat- Preparation- (1987-)

Citation Formats

Stoessner, R D, Shirey, G A, Zawadzki, E A, Welsh, C F, Miller, J D, and Shell, W P. Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning. United States: N. p., 1990. Web.
Stoessner, R D, Shirey, G A, Zawadzki, E A, Welsh, C F, Miller, J D, & Shell, W P. Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning. United States.
Stoessner, R D, Shirey, G A, Zawadzki, E A, Welsh, C F, Miller, J D, and Shell, W P. 1990. "Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning". United States.
@article{osti_6581547,
title = {Air-Sparged Hydrocyclone/Advanced Froth Flotation fine coal cleaning},
author = {Stoessner, R D and Shirey, G A and Zawadzki, E A and Welsh, C F and Miller, J D and Shell, W P},
abstractNote = {In May 1988, the Pennsylvania Electric Company (Penelec) and New York State Electric and Gas Corporation (NYSEG) were awarded a contract from the Department of Energy's Pittsburgh Energy and Technology Center (DOE-PETC) to evaluate the performance of a two-inch Air-Sparged Hydrocyclone (ASH) for cleaning fine minus-100-mesh coal. A 24-month study was successfully completed, optimizing the performance of the ASH for cleaning raw classified, naturally-occurring minus-100-mesh Upper Freeport coal, and comparing its performance with Advanced Froth Flotation (AFF), a procedure utilizing conventional flotation equipment operated in an advanced manner (low impeller speeds, starvation float, multiple-stage cleaning, etc.) with highly selective reagents to optimize ash and pyritic sulfur rejection. The economics of cleaning fine coal by both processes at commercial scale, for retrofit and greenfield applications were found to be comparable within the accuracy of the study. Technical performance of the two processes were also found to be essentially identical. Thus, the ASH would be the best choice for a retrofit installation into an existing plant because of requiring less space. Both processes were successful in achieving excellent separations when cleaning the Upper Freeport coal. Both the ASH and AFF circuits were able to produce a clean-coal product of yield (65--80 percent weight recovery) and quality (5--6 percent ash) equivalent to that as theoretically determined by float-sink washability analyses. Combining either of the two fine coal flotation processes with a classifying cyclone circuit resulted in pyritic sulfur rejection values of about 85 percent. 47 refs., 109 figs., 75 tabs.},
doi = {},
url = {https://www.osti.gov/biblio/6581547}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun May 27 00:00:00 EDT 1990},
month = {Sun May 27 00:00:00 EDT 1990}
}

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