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Recovery of coal fines from preparation plant effluents. Final technical report, September 1, 1990--August 31, 1991

Description: The objectives of this project were to test and demonstrate the feasibility of recovering coal fines that are currently disposed of with coal preparation plant effluent streams and producing a fine clean coal product that can be blended with the plant coarse clean coal. This recovery was effected by means of Michigan Technological University`s static tube flotation process, which was successfully demonstrated on a number of raw coals to reject 85% of the pyritic sulfur and recover 90% of the co… more
Date: December 31, 1991
Creator: Choudhry, V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Liquid chromatographic analysis of coal surface properties. Quarterly progress report, April--June 1993

Description: Experiments were performed on equilibrium adsorption of probes (2-methyl-1-pentanol (2M1P), 1-heptanol, benzene, toluene) on 60-200 mesh Illinois 6 coal, Adaville 1 coal, Wyodak coal, and Pittsburgh 8 coal. Equil. loadings of toluene are higher than those of benzene on the 4 coals. The aromatics (tolene, benzene) obey the Langmuir isotherm model for single-layer adsorption up to 100 ppM. Loadings of 2M1P and 1-heptanol do not follow both the Langmuir and the Freundlich empirical model. Flotatio… more
Date: November 1, 1993
Creator: Kwon, K. C. & Rigby, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optimizing the air flotation water treatment process. Final report, May 1997

Description: The injection water for the Nelson Project is a combination of produced and make-up water, typical of many Eastern Kansas operations. The make-up water is a low-salinity salt water from the Arbuckle Formation and contains dissolved minerals and sulfides. The produced water contains suspended oil, suspended clay and silt particles, along with a combination of other dissolved minerals. The combination of the two waters causes several undesirable reactions. The suspended solids load contained in t… more
Date: September 1, 1998
Creator: Barnett, B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Improvement of storage, handling and transportability of fine coal. Quarterly technical progress report No. 3, July 1, 1994--September 30, 1994

Description: The Mulled Coal process was developed as a means of overcoming the adverse handling characteristics of wet fine coal without thermal drying. The process involves the addition of a low cost, harmless reagent to wet fine coal using off-the-shelf mixing equipment. The objectives of this project are to demonstrate that: The Mulled Coal process, which has been proven to work on a wide range of wet fine coals at bench scale, will work equally well on a continuous basis, producing consistent quality a… more
Date: August 16, 1996
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A Fine Coal Circuitry Study Using Column Flotation and Gravity Separation. Quarterly report, 1 March 1995--31 May 1995

Description: Column flotation provides excellent recovery of ultrafine coal while producing low ash content concentrates. However, column flotation is not efficient for treating fine coal containing significant amounts of mixed-phase particles. Fortunately, enhanced gravity separation has proved to have the ability to treat the mixed-phased particles more effectively. A disadvantage of gravity separation is that ultrafine clay particles are not easily rejected. Thus, a combination of these two technologies … more
Date: December 31, 1995
Creator: Honaker, R. Q. & Reed, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An advanced control system for fine coal flotation. Fifth quarterly technical progress report, October 1, 1996--December 31, 1996

Description: A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on- line analysis of ash content. Then, based on the economic and metallurgical performance of the circuit, variables such as reagent dosage, pulp density and pulp level are adjusted using model-base control algorithms to compensate for feed variations and other process disturbances. Recent developments i… more
Date: March 4, 1997
Creator: Adel, G. T. & Luttrell, G. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Preliminary evaluation of resinite recovery from Illinois coal. [Quarterly] technical report, September 1--November 30, 1994

Description: Resinite is a naturally occurring substance found in coal and derived from original plant resins. It is ubiquitous in North American coals. It makes up one to four percent by volume of most Illinois coals. It has been commercially exploited in the western USA for use in adhesives, varnishes and thermal setting inks. The overall objective of this project is to compare the properties of the resinite contained in Illinois Basin coals to resinite being commercially exploited in the western United S… more
Date: December 31, 1994
Creator: Crelling, J.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The interactive effects of pH, surface tension, and solution density for flotation systems for separation of equivalent-density materials: separation of ABS from HIPS

Description: This paper presents the results of research being conducted at Argonne National Laboratory, to develop a cost-effective and environmentally acceptable process for the separation of high-value plastics from discarded household appliances. The process under development has separated high-purity (greater than 99.5%) acrylonitrile-butadiene-styrene (ABS) and high-impact polystyrene (HIPS) from commingled plastics generated by appliance-shredding and metal recovery operations. Plastics of similar de… more
Date: July 1, 1996
Creator: Karvelas, D. E.; Jody, B. J.; Pomykala, J. A. & Daniels, E. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A comparison study of column flotation technologies for cleaning Illinois coal. [Quarterly] technical report, December 1, 1993--February 28, 1994

Description: The objectives of this research project are to optimize the performance of six commercially available column technologies for the treatment of Illinois Basin coal fines and to compare their performance on the basis of the recovery-grade curve and column throughput capacity. A statistically-designed, experimental program will be conducted to optimize the critical operating performance values of each flotation column. During the previous reporting period, construction and installation of the six … more
Date: June 1, 1994
Creator: Honaker, R. Q. & Paul, B. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of the selective hydrophobic coagulation process. Technical progress report for the ninth quarter, October 1--December 31, 1993

Description: A novel technique for selectively coagulating and separating coal from dispersed mineral matter has been developed at Virginia Tech. The process, known as Selective Hydrophobic Coagulation (SHC), has been studied under the sponsorship of the U.S. Department of Energy since 1986 (Contracts DE-AC22-86PC91221 & DE-AC22- 9OPC90174). The SHC process differs from oil agglomeration, shear flocculation, polymer flocculation, and electrolytic coagulation processes in that it does not require reagents or… more
Date: July 1, 1994
Creator: Yoon, R. H. & Luttrell, G. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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REMOVAL OF ORGANIC CHEMICALS FROM WASTEWATER BY SURFACTANT SEPARATION

Description: This research presents a novel hybrid process for removing organic chemicals from contaminated water. The process uses surfactant to carry out two unit operations (1) Extraction; (2) Foam flotation. In the first step, surfactant is used to extract most of the amounts of organic contaminants in the stream. In the second step, foam flotation is used to further reduce organic contaminants and recover surfactant from the stream. The process combines the advantages of extraction and foam flotation, … more
Date: January 1, 2002
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. Twelfth quarterly technical progress report, June 1, 1992--August 31, 1992

Description: Over the past 10 years, much research has provided convincing evidence that one major difficulty in using froth flotation to separate pyrite from coal is the ``self-induced`` flotation of pyrite. Numerous studies have attempted to identify reactions that occur under moderate oxidizing conditions, which lead to self-induced flotation, and to identify the oxidization products. During the past two report periods, it was established that: (1) freshly fractured pyrite surfaces immediately assume, at… more
Date: December 31, 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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A study of multistage/multifunction column for fine particle separation

Description: The overall objective of the research program is to explore the potential application of a new invention involving a multistage column equipped with vortex-inducing loop-flow contactors (hereafter referred to as the multistage column) for fine coal cleaning process. The research work will identify the design parameters and their effects on the performance of the separation process. The results of this study will provide an engineering basis for further development of this technology in coal cle… more
Date: July 1, 1996
Creator: Chiang, Shiao-Hung
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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New concept for coal wettability evaluation and modulation. Technical progress report for the project, July 1, 1995--September 30, 1995

Description: This project is concerned with the new concept for coal surface wettability and floatability evaluation and modulation. the objective of the work is the fundamental surface chemistry features about the evaluation of the surface wettability and floatability of coal and pyrite, and establish a new separation strategy which could contribute to advanced coal-cleaning for premium fuel application. In this quarter, the mini-cell flotation tests are conducted to study kinetic floatability and kinetic … more
Date: December 31, 1995
Creator: Hu, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Appalachian clean coal technology consortium. Technical quarterly progress report, October 1, 1996--December 31, 1996

Description: Novel chemicals that can be used for increasing the efficiency of fine coal dewatering was developed at Virginia Tech. During the past quarter, Reagent A was tested on three different coal samples in laboratory vacuum filtration tests. These included flotation products from Middle Fork plant, Elkview Mining Company, and CONSOL, Inc. The tests conducted with the Middle Fork coal sample (100 mesh x 0) showed that cake moisture can be reduced by more than 10% beyond what can be achieved without us… more
Date: January 28, 1997
Creator: Yoon, R. H.; Basim, B.; Luttrell, G. H. & Phillips, D. I.
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. Progress Report

Description: The objective of this research is to develop a mechanistic understanding of the oxidation of coal and coal pyrite, and to correlate the intrinsic physical and chemical properties of these minerals, along with changes resulting from oxidation, with those surface properties that influence the behavior in physical cleaning processes. Work during the eighteenth quarter has focused on severe oxidation of coal by thermal and chemical treatment, and on investigating the partition of metal ions between… more
Date: February 28, 1995
Creator: Doyle, F. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering development of advanced physical fine coal cleaning for premium fuel applications

Description: The primary goal of this project is the engineering development of two advanced physical fine coal cleaning processes, column flotation and selective agglomeration, for premium fuel applications. The project scope included laboratory research and bench-scale testing on six coals to optimize these processes, followed by the design, construction and operation of 2 t/hr process development unit (PDU). This report represents the findings of the PDU Advanced Column Flotation Testing and Evaluation p… more
Date: August 28, 1997
Creator: Shields, G. L.; Smit, F. J. & Jha, M. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering development of advanced physical fine coal cleaning for premium fuel applications

Description: The goal of this project is engineering development of two advanced physical fine coal cleaning processes, column flotation and selective agglomeration, for premium fuel applications. Its scope includes laboratory research and bench-scale testing on six coals to optimize these processes, followed by design and construction of a 2 t/h process development unit (PDU). Large lots of clean coal are to be produced in the PDU from three project coals. Investigation of the near-term applicability of th… more
Date: April 25, 1997
Creator: Smit, F. J.; Jha, M. C.; Phillips, D. I. & Yoon, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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An advanced control system for fine coal flotation. Fourth quarterly technical progress report, July 1, 1996--September 30, 1996

Description: A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on-line analysis of ash content. Then, based on the economic and metallurgical performance of the circuit, variables such as reagent dosage, pulp density and pulp level are adjusted using model-based control algorithms to compensate for feed variations and other process disturbances. Recent developments i… more
Date: March 4, 1997
Creator: Adel, G. T. & Luttrell, G. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of enhanced sulfur rejection processes

Description: Research at Virginia Tech led to the development of two complementary concepts for improving the removal of inorganic sulfur from many eastern U.S. coals. These concepts are referred to as Electrochemically Enhanced Sulfur Rejection (EESR) and Polymer Enhanced Sulfur Rejection (PESR) processes. The EESR process uses electrochemical techniques to suppress the formation of hydrophobic oxidation products believed to be responsible for the floatability of coal pyrite. The PESR process uses polymeri… more
Date: March 1, 1996
Creator: Yoon, R. H.; Luttrell, G. H.; Adel, G. T. & Richardson, P. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Ohio Coal Testing and Development Facility - Construction and operation. Final report

Description: On June 14, 1987, the Ohio Coal Development Office (OCDO) executed a grant agreement with ICF Kaiser Engineers (ICF Kaiser) for the planning and design (Phase I) of a Demonstration Advanced Technology Coal Preparation Facility. Subsequently, on December 1, 1990, OCDO executed a grant agreement with the American Electric Power Service Corporation (AEPSC) through its subsidiary, the Ohio Power Company, for the final design and construction (Phase II), testing and operation (Phase III), and market… more
Date: March 1, 1996
Creator: Ferris, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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AN ADVANCED CONTROL SYSTEM FOR FINE COAL FLOTATION

Description: A model-based flotation control scheme is being implemented to achieve optimal performance in the handling and treatment of fine coal. The control scheme monitors flotation performance through on-line analysis of tailings ash content. Then, based on an on-line estimate of incremental ash, the pulp level is adjusted using a model-based control algorithm to compensate for feed variations and other process disturbances. Recent developments in sensor technology are being applied for on-line determi… more
Date: January 11, 1999
Creator: Luttrell, G. H. & Adel, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Engineering Development of Advanced Physical Fine Coal Cleaning Technologies: Froth Flotation. Quarterly Technical Progress Report No. 15, April 1, 1992--June 30, 1992

Description: The Department of Energy (DOE) awarded a contract entitled ``Engineering Development of Advanced Physical Fine Coal Cleaning Technology - Froth Flotation``, to ICF Kaiser Engineers with the following team members, Ohio Coal Development Office, Babcock and Wilcox, Consolidation Coal Company, Eimco Process Equipment Company, Illinois State Geological Survey, Virginia Polytechnic Institute and State University, Process Technology, Inc. This document a quarterly report prepared in accordance with t… more
Date: February 12, 1993
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pyrite surface characterization and control for advanced fine coal desulfurization technologies. Third quarterly technical progress report, March 1, 1991--May 30, 1991

Description: The objective of this project is to conduct extensive studies on the surface reactivity of pyrite by using electrochemical, surface analysis, potentiometric and calorimetric titration, and surface hydrophobicity characterization techniques and to correlate the alteration of the coal-pyrite surface with the efficiency of pyrite rejection in coal flotation. The products as well as their structure, the mechanisms and the kinetics of the oxidation of coal-pyrite surfaces and their interaction with … more
Date: December 31, 1991
Creator: Wang, Xiang-Huai; Leonard, J. W.; Parekh, B. K.; Raichur, A. M. & Jiang, Chengliang
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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