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Characterization of multiphase fluid flow during air-sparged hydrocyclone flotation by x-ray CT. Twelfth quarterly report, 14 May--13 August 1993

Description: During this quarter some experiments from the previous set were repeated to check the reproducibility of the results. Also, a new set of experiments was carried out to study the effects of (1) collector dosage, (2) Q* -- the nondimensional ratio of air flow rate to slurry flow rate, and (3) slurry pressure on the flow characteristics. Four different Q* values with hydrophobic particles in the feed slurry were studied. The value of A*, the dimensionless ratio of overflow opening area to underflo… more
Date: August 13, 1993
Creator: Miller, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Second annual clean coal technology conference: Proceedings. Volume 1

Description: The Second Annual Clean Coal Technology Conference was held at Atlanta, Georgia, September 7--9, 1993. The Conference, cosponsored by the US Department of Energy (USDOE) and the Southern States Energy Board (SSEB), seeks to examine the status and role of the Clean Coal Technology Demonstration Program (CCTDP) and its projects. The Program is reviewed within the larger context of environmental needs, sustained economic growth, world markets, user performance requirements and supplier commerciali… more
Date: September 9, 1993
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A Combined Physical/Microbial Process for Coal Beneficiation

Description: A combined physical/microbial process for the removal of pyritic sulfur from coal was demonstrated in a 200 L aerated trough slurry reactor. The reactor was divided into six sections, each of which acted as both a physical separator and a bioreactor. Settled solids from sections 2 through 6 were recycled to section 1 which acted as a rougher. The objective was physical removal of the larger pyritic inclusions, which would take many days to biodegrade, and biodegradation of the micropyrite, whic… more
Date: November 1, 1993
Creator: Noah, K. S.; Glenn, A. W.; Stevens, C. J.; McAtee, N. B.; McIlwain, M. E. & Andrews, G. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Healy Clean Coal Project: Healy coal firing at TRW Cleveland Test Facility. Final report

Description: A test burn of two Alaskan coals was conducted at TRW`s Cleveland test facility in support of the Healy Clean Coal Project, as part of Clean Coal Technology III Program in which a new power plant will be constructed using a TRW Coal Combustion System. This system features ash slagging technology combined with NO{sub x} and SO{sub x} control. The tests, funded by the Alaska Industrial Development and Export Authority (AIDEA) and TRW, were conducted to verify that the candidate Healy station coal… more
Date: August 1, 1991
Creator: Koyama, T.; Petrill, E. & Sheppard, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a Coal Quality Expert. Final technical progress report No. 12, [January 1--March 31, 1993]

Description: During the past quarter, Tasks 3, 4, 5, and 6 were active. Task 3 Pilot Scale Combustion Testing activity included data analysis of pilot- and bench-scale combustion samples in support of the development of CQE slogging and fouling models. Under Task 4, field testing at the fifth host utility site -- New England Power Service Company`s Brayton Point Unit 3 -- was completed in March with the testing of the alternate coal. Test plans were finalized for the sixth and final field test to be perform… more
Date: August 12, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of the electroacoustic dewatering (EAD) process for fine/ultrafine coal. Final report

Description: Battelle (Columbus, Ohio) undertook development of its electro-acoustic (EAD) process to demonstrate its commercial potential for continuous dewatering of fine and ultrafine coals. The pilot plant and laboratory results, provided in this report, show that a commercial-size EAD machine is expected to economically achieve the dewatering targets for {minus}100 mesh and {minus}325 mesh coals. The EAD process utilizes a synergistic combination of electric and acoustic (e.g., ultrasonic) fields in co… more
Date: October 31, 1991
Creator: Chauhan, S. P.; Kim, B. C.; Menton, R.; Senapati, N.; Criner, C. L.; Jirjis, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydrothermal Pretreatment of Coal. Quarterly Report No. 4, July 16--October 15, 1990

Description: During this period we studied the effects of 350{degrees}C treatment on Argonne-supplied Wyodak coal with n-alkane undecane in place of water in both 30 min. and 5 hr. experiments. Undecane was chosen because it has a critical temperature of 363{degrees}C (calculated), similar to that for water, and is present as a liquid phase at conditions. We anticipated results little different from those from the simple thermal treatment (coal under N{sub 2}) at the same conditions. In that case we had fou… more
Date: January 3, 1991
Creator: Loo, Bock & Ross, David S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bench-scale testing of on-line control of column flotation using a novel analyzer. Revised final report, [October 1992--October 1993]: Volume 1

Description: The main advantage of the project is that it allowed PTI to gain knowledge and experience about the proper approach, methods and hardware required to properly optimize and control column flotation performance. Many operational problems were incurred during the project, some of that PTI was able to solve during the project and other that must be overcome as the technology is further developed and commercialized. The key operating problems experienced with the KEN-FLOTE{sup TM} Column that must b… more
Date: October 27, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering design and analysis of advanced physical fine coal cleaning technologies. Quarterly technical progress report No. 12, July--September 1992

Description: The major goal is to provide the simulation tools for modeling both conventional and advanced coal cleaning technologies. This DOE project is part of a major research initiative by the Pittsburgh Energy Technology Center (PETC) aimed at advancing three advanced coal cleaning technologies- advanced cylconing, selective agglomeration, and advanced froth flotation through the proof-of-concept. The commercially available ASPEN PLUS process simulation package will be extended to handle coal cleaning… more
Date: October 20, 1992
Creator: Gallier, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bench scale testing of micronized magnetite beneficiation. Quarterly technical progress report No. 1, January--March 1993

Description: This project is aimed at development of a process that, by using ultra fine magnetite suspension, would expand the application of heavy media separation technology to processing fine, {minus}28 mesh coals. These coal fines, produced during coal mining and crushing, are separated in the conventonal coal preparation plant and generally impounded in a tailings pond. Development of an economic process for processing these fines into marketable product will expand the utilization of coal for power p… more
Date: September 1, 1993
Creator: Anast, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary proceedings

Description: A public meeting was convened by the Department of Energy (DOE) on February 10 and 11, 1994 in order to discuss government plans for the export of clean coal technologies -- The ``Clean Coal International Technology Transfer Program.`` In the sections that follow, brief descriptions are provided of the background to the solicitation and the public meeting, and how the meeting was conducted. Subsequent chapters of this report present the discussions that ensued at the meeting, and the views, rec… more
Date: March 1, 1994
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Selective flotation of fossil resin from Western coal. Final report, July 1, 1990--May 25, 1992

Description: The proof-of-concept test program was designed to clarify a number of concerns that have been raised by coal companies who own the valuable resin resource. First, from laboratory bench-scale flotation experiments, a froth product from cleaner flotation containing more than 80% hexane-extractable resin at higher than 80% recovery can be produced. Pilot-plant testing was initiated to demonstrate the selective flotation of fossil resin and to establish a better confidence level in the new technolo… more
Date: May 25, 1992
Creator: Jensen, G. F. & Miller, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Control of pyrite surface chemistry in physical coal cleaning. Seventh quarterly progress report, March 1, 1991--May 31, 1991

Description: The removal of pyrite from coal by flotation or any other surface chemistry based separation process is often hampered by the apparent hydrophobicity of the mineral. Results obtained in this project suggest that corrosion processes are responsible for the apparent hydrophobicity of pyrite in aqueous environments. Characterization of the corrosion products of pyrite in acidic and alkaline solution has been performed using electrochemical (cyclic voltammetry and single-potential-step chronoampero… more
Date: June 24, 1992
Creator: Luttrell, G. H.; Yoon, R. H. & Zachwieja, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Control of pyrite surface chemistry in physical coal cleaning. Tenth quarterly progress report, December 1, 1991--February 29, 1992

Description: One of the most difficult separations in minerals processing involves the differential flotation of pyrite and coal. Under practical flotation conditions, they are both hydrophobic and no cost-effective method has been developed to efficiently reject the pyrite. The problem arises from inherent floatability of coal and pyrite. Coal is naturally hydrophobic and remains so under practical flotation. Although pyrite is believed to be naturally hydrophilic under practical flotation conditions it un… more
Date: June 24, 1992
Creator: Yoon, R. H. & Richardson, P. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Enhancement of surface properties for coal beneficiation. Final report

Description: This report will focus on means of pyrite removal from coal using surface-based coal cleaning technologies. The major subjects being addressed in this study are the natural and modulated surface properties of coal and pyrite and how they may best be utilized to facilitate their separation using advanced surface-based coal cleaning technology. Emphasis is based on modified flotation and oil agglomerative processes and the basic principles involved. The four areas being addressed are: (1) Collect… more
Date: January 30, 1992
Creator: Chander, S. & Aplan, F. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Electrostatic Beneficiation of Coal. Quarterly Technical Progress Report, January 1, 1994--March 31, 1994

Description: Electrostatic beneficiation of dry coal has received significant attention in the last decade. In this process the coal is ground and then charged, either by corona charging or by triboelectrification (friction charging). Coal and minerals receive different levels of charge -- often opposite polarities in the case of triboelectrification -- and can then be separated based on differences in electrical mobility. Problems associated with the techniques include rapid deposition of particles on the … more
Date: April 28, 1994
Creator: Mazumder, M. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bench-scale testing of the multi-gravity separator in combination with Microcel. First quarterly report, September 29, 1992--December 31, 1992

Description: The primary objective of the proposed work is to design, install and operate an advanced fine coal processing circuit combining Microcel and MGS technologies. Both of these processes have specific advantages as stand-alone units. For example, the Microcel column is effective in removing ash-bearing mineral matter, while the MGS is capable of efficiently removing coal-pyrite composites. Therefore, by combining both of these unit operations into a single processing circuit, synergistic advantages… more
Date: January 29, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Surface electrochemical control for fine coal and pyrite separation. Final report

Description: Laboratory flotation tests were carried out on three coals and on coal pyrite. Floatability measurements included natural floatability, flotation with a xanthate collector and salt flotation. The ranking of the floatability of the three coals were: Upper Freeport > Pittsburgh > Illinois. The floatability of mineral pyrite and coal pyrite increased markedly with xanthate concentration, but decreased with increased pH. In general, coal pyrite was more difficult to float than mineral pyrite. This … more
Date: January 20, 1993
Creator: Wadsworth, Milton E.; Bodily, David M.; Hu, Weibai; Chen, Wanxiong; Huang, Qinping; Liang, Jun et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Bench-scale testing of the multi-gravity separator in combination with microcel. Fourth quarterly report, July 1, 1993--September 30, 1993

Description: Work this quarter included equipment installation, shakedown testing, and the beginning of the detailed testing program. With the exception of ongoing Task 4: Sample Characterization, Tasks 1 through 8 are now complete. Task 10: Detailed Testing and Task 12: Sample Analysis began this quarter and will consume all available time during the 5th quarter. Installation and testing of the process equipment, mechanical systems, as well as the electrical systems were completed. The shakedown process un… more
Date: December 6, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering design and analysis of advanced physical fine coal cleaning technologies. Quarterly technical progress report No. 9, October--December 1991

Description: This project is sponsored by the United States Department of Energy (DOE) for the ``Engineering Design and Analysis of Advanced Physical Fine Coal Cleaning Technologies. The major goal is to provide the simulation tools for modeling both conventional and advanced coal cleaning technologies. This DOE project is part of a major research initiative by the Pittsburgh Energy Technology Center (PETC) aimed at advancing three advanced coal cleaning technologies-heavy-liquid cylconing, selective agglom… more
Date: January 20, 1992
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Oxidation of Coal and Coal Pyrite Mechanisms and Influence on Surface Characteristics. Technical Progress Report, March 31, 1993

Description: During the tenth quarter, electrochemical experiments were done on electrodes prepared from Upper Freeport coal pyrite, and Pittsburgh coal pyrite samples provided by the US Bureau of Mines, Pittsburgh Research Center, Pennsylvania. Electrokinetic tests were done on Upper Freeport and Pittsburgh coal pyrite. In addition, surface area measurements were done on Upper Freeport and Upper Clarion coals.
Date: April 1, 1993
Creator: Doyle, Fiona M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Refining of fossil resin flotation concentrate from Western coal. Fourth quarterly final report, October 1, 1993--December 31, 1993

Description: Four resinite types, namely yellow, amber, light-brown, and dark-brown in color, occurring in the Wasatch Plateau coal field, are mainly composed of aliphatic components. In contrast coal consists primarily of aromatic ring structures, various oxygen functional groups ({minus}OH, >C=O, {minus}C{minus}O) and few aliphatic chains. The color difference observed among the four hand-sorted resin types is explained by the presence of chromophores (O, S, and N atoms and C=C double bonds) and also by t… more
Date: January 5, 1994
Creator: Jensen, G. F. & Miller, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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