Selective agglomeration of a Pittsburgh Seam coal with isooctane

Lai, R; Killmeyer, R; Utz, B; Richardson, A; Sinha, K

Title: Selective agglomeration of a Pittsburgh Seam coal with isooctane

Full Record
Other Related Research

Abstract

The Pittsburgh Energy Technology Center initiated a research program in 1989 to investigate the fundamentals of selective agglomeration as applied to the cleaning of coals. The results of the initial study with Bruceton mine, Pittsburgh seam coal, using isooctane as an agglomerant, have been published. Subsequent to the successful reduction of the ash content of Bruceton coal to less than 0.9% after two cleaning stages, the study was extended to compare a coal from the same seam, but from Ohio. In the previous parameter optimization tests with Bruceton coal, particle size and slurry pH were found to be important parameters governing coal cleanability. Other researchers have obtained similar conclusions of the effects of particle size and coal slurry pH on the cleanability of various coals. In this study, the effects of these parameters on the cleanability of Powhatan coal were examined. Particle size reduction kinetics was examined first. Effects of size reduction (degree of mineral matter liberation), oil (isooctane)-to-coal ratio, and slurry pH on mineral matter rejection and combustible recovery were also examined. A petrographic comparison was conducted on the Powhatan and Bruceton coals to examine the degree of pyrite liberation as a function of particle size to elucidate whymore »« less

Authors:

Lai, R; Killmeyer, R; Utz, B ^[1]; Richardson, A; Sinha, K ^[2]

USDOE Pittsburgh Energy Technology Center, PA (United States). Coal Preparation Div.
Oak Ridge Associated Universities, Inc., TN (United States)

Publication Date:: Wed Jan 01 00:00:00 EST 1992

Research Org.:: USDOE Pittsburgh Energy Technology Center, PA (United States). Coal Preparation Div.

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 10110227

Report Number(s):: DOE/PETC/TR-92/2; CONF-901218-2
ON: DE92006410

Resource Type:: Conference

Resource Relation:: Conference: Fine coal cleaning,Palm Coast, FL (United States),2-7 Dec 1990; Other Information: PBD: Jan 1992

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; BITUMINOUS COAL; AGGLOMERATION; MINERALS; REMOVAL; FUEL SLURRIES; PH VALUE; PARTICLE SIZE; ASH CONTENT; PYRITE; COMMINUTION; KINETICS; OILS; 010300; PREPARATION

Citation Formats


                    Lai, R, Killmeyer, R, Utz, B, Richardson, A, and Sinha, K. Selective agglomeration of a Pittsburgh Seam coal with isooctane.  United States: N. p., 1992. 
        Web.

Copy to clipboard


                    Lai, R, Killmeyer, R, Utz, B, Richardson, A, & Sinha, K. Selective agglomeration of a Pittsburgh Seam coal with isooctane.  United States.

Copy to clipboard


                    Lai, R, Killmeyer, R, Utz, B, Richardson, A, and Sinha, K. 1992.  
        "Selective agglomeration of a Pittsburgh Seam coal with isooctane".  United States.  https://www.osti.gov/servlets/purl/10110227.

Copy to clipboard


                    
@article{osti_10110227,

  title        = {Selective agglomeration of a Pittsburgh Seam coal with isooctane},

  author       = {Lai, R and Killmeyer, R and Utz, B and Richardson, A and Sinha, K},

  abstractNote = {The Pittsburgh Energy Technology Center initiated a research program in 1989 to investigate the fundamentals of selective agglomeration as applied to the cleaning of coals. The results of the initial study with Bruceton mine, Pittsburgh seam coal, using isooctane as an agglomerant, have been published. Subsequent to the successful reduction of the ash content of Bruceton coal to less than 0.9% after two cleaning stages, the study was extended to compare a coal from the same seam, but from Ohio. In the previous parameter optimization tests with Bruceton coal, particle size and slurry pH were found to be important parameters governing coal cleanability. Other researchers have obtained similar conclusions of the effects of particle size and coal slurry pH on the cleanability of various coals. In this study, the effects of these parameters on the cleanability of Powhatan coal were examined. Particle size reduction kinetics was examined first. Effects of size reduction (degree of mineral matter liberation), oil (isooctane)-to-coal ratio, and slurry pH on mineral matter rejection and combustible recovery were also examined. A petrographic comparison was conducted on the Powhatan and Bruceton coals to examine the degree of pyrite liberation as a function of particle size to elucidate why one coal from the same seam can be cleaned significantly better than another. (VC)},

  doi          = {},

  url          = {https://www.osti.gov/biblio/10110227},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Jan 01 00:00:00 EST 1992},

  month        = {Wed Jan 01 00:00:00 EST 1992}

}

Copy to clipboard

Conference:

View Conference (0.98 MB)

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Investigation of pyrite and mineral matter reduction in a selective coal agglomeration process

Miscellaneous Ciocco, M

In selective agglomeration processes, fine coal/water slurries are contacted with light hydrocarbon in a high-shear agglomerator. Based on the hydrophobicity of the organic coal macerals, the light hydrocarbon selectively wets and bridges the clean coal particles to form agglomerates whereas the mineral matter, including pyrite, remains dispersed in the water phase. The major problem associated with selective agglomeration processes is poor pyrite-mineral matter removal. The objective of this research is to effectively liberate the mineral matter, particularly pyrite, from the feed coal by various grinding methods and to optimize the clean coal recovery and mineral matter as well as inorganicmore »« less
Deep cleaning Pittsburgh Seam coal for sulfur dioxide reduction: Coal Quality Development Center: Campaign report, Number 11: Interim report

Technical Report Torak, E; Akers, D; Cavalet, J

Extensive laboratry- and commercial-scale tests to characterize the cleanability of a 1500-t (1360-metric-t) shipment of raw Pittsburgh Seam coal were performed. The investigation included raw-coal analyses, laboratory froth flotation testing, and commercial-scale flowsheet cleaning tests. The potential of coal curshing to liberate impurities and the ffect of coal cleaning on combustion characteristics was also evaluated. Crushing raw Pittsburgh Seam coal facilitates sulfur, but not ash, removal. Laboratory testing of coal crushed to topsizes smaller than 34 in. (19 mm) before cleaning showed significant reduction in potential SO/sub 2/ emissions at a given level of energy recovery. Tests indicated that deepmore »« less
Development of the selective coagulation process

Technical Report Yoon, R; Luttrell, G

Recent studies have resulted in the development of a novel agglomeration process for upgrading ultrafine coal. This process, which is known as selective hydrophobic coagulation (SHC), is based on the new finding that hydrophobic coal particles can be selectively coagulated in the presence of dispersed mineral matter. The driving force for the coagulation is believed to be due to the structural arrangement of water molecules near the coal surface. In most cases, simple pH control is all that is required to (1) induce the coagulation of the coal particles and (2) effectively disperse the particles of mineral matter. During themore »« less
Influence of particle size and pH on the removal of trace elements from high-rank coals by n-heptane agglomeration

Book Martinez-Tarazona, M; Vega, J; Garcia, A

During combustion and gasification, trace elements are released into the environment, some of them in their vapor phase and others associated with the smaller and more respirable particles. Some of these elements are essential to plant and animal life, while others by be toxic under certain conditions and concentration. Although the effect of trace element emissions is not well known, and the evaluation of the potential toxicity of each element and its common compounds is an issue to be clarified, the growing concerns over environmental aspects associated with trace elements had led to the introduction in many countries of regulationsmore »« less
Upgrading of coal liquefaction feedstock by selective agglomeration

Conference Lai, R; Sinha, K; Richardson, A; ...

The technical feasibility study of using selective agglomeration (with coal-derived oil) to upgrade Illinois No. 6 coal for a liquefaction feedstock was completed. Effects of coal particle size, slurry pH, oil-to-coal ratio, and operating temperature on mineral matter reduction, clean coal weight recovery, and clean coal moisture content were studied. The addition of coal-derived naphtha or kerosene as conditioners to increase hydrophobicity and recovery of coal was also investigated. Results showed that approximately 70% of the mineral matter could be removed from this coal at a clean coal weight recovery of over 85% by grinding the coal to a meanmore »« less
Full Text Available

Similar Records