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01668 Ultrafine coal single-stage dewatering and briqueting process
07
Solid
fuels
(transport,
Transport,
storage)
97101665 Self-heating tests to establish the shipping of solid materials: The case for briquetted peat
Storage
Jones, J. C. J. Fire Sci., 1996, 14, (5). 342-345. This discussion reviews the testing of the self-ignition their application to briquetteted peat.
97101655
Coal handleability-a
Coal log technology
for handling
and transporting
coal fines Liu, H. et al. Cm/ Fines: Uncluinted Fuel, ~Annrr. Tech. Conf.], 2Oth, 1995. 33-37. Edited bv Serkin, S. D. Coal & Slurrv Technology-. Association, Washington. DC: The results of laboratory tests of compaction and extrusion of coal fines into coal logs is the focus of this paper. Preliminary results show that making coal logs is a promising solution to the coal fines problem. A machine has been designed for rapid production of coal logs in commercial settings.
97101657
Coal slurry manufacturing
apparatus
Shimoda, H. and Watanabe, S. Jpn. Kokai Tokkyo Koho JP 08,200,648 [96,200.648] (:CI. F23K1102). 6 Aug 1996, Appl. 95110,008, 25 Jan 1995; 4 pp. (In Japanese) The apparatus for the manufacture of stable coal-water slurries (or CWM) for transportation comprises a hammer crusher for crushing coal into coarse particles, a double-roll crusher for coarse particles, and a recycling means for recycling at least a part of the fine particles to the input side of the double-roll crusher.
Demonstration of mulled coal production, handling, and transportation in existing commercial equipment
97101656
Davis, B. E. et al. Cod Fines: Unclainwd Fuel, [Annu. Tech Conf.], ZOth, 1995, 13-24. Edited by Serkin, S. D. Coal & Slurry Technology Association, Washington, DC. The developmental steps of the technology for treating wet coal fines for improved storage, transportation and handling characteristics are presented.
Engineering and economic aspects of selection 97101659 coal conveying system in Czech underground mines Polak, J. and Drozdek, 554-560.
97lOl660
coals and
good or a bad coal?
Brown, G. J. et al. Part. Part. Syst. Charact., 1996, 13, (4), 260-263. The authors determined the avalanching behaviour of two coal types, one of good and the other of poor handleability characteristics. This revealed significant differences in the nature of flow of the coals. The criteria established will now enable a structured study of the variables that affect handleability and also permit industrial consumers of coal to specify minimum acceptable limits for its transport characteristics.
97101656
of brown
safety
K.
Proc. Annu.
Int. Pittsburgh
Evaluation
of certain
factors
Coal Conf.,
inducing
of
1995, 12,
97101666 The effect of moisture taneous combustibility of coal
condensation
on the spon-
Bhat, S. and Agarwal. P. K. Fuel, 1996. 75, (13), 1523-1532 The current work extends the reaction-diffusion approach developed previously, considering the effects of moisture evaporation and condensation on the rate of oxidation of coal. It is shown that partial wetting of coal or condensation of moisture exerts two competing influences on the overall rate of oxidation. Based on the Insight provided by the model, a simple criterion is derived to determine conditions under which condensation of moisture on coal can lead to spontaneous combustion. This model is thought to be the first mathematical description which links the coamoisture interaction to the potential for spontaneous combustion.
97101667
Process
The utilization of Orimulsion in the for fine coal dewatering and handling
GranuFlow
Wen. W. -W. and Killmeyer, R. P. .‘%rp$. Coal Firres: Uncluimcd I;‘wl. Pup. Int. Tech. Conf: Coal Util. Furl Swt.. Z/.st. 1996, 69-70. Edited hy Serkin. S. D. Coal & Slurry Technology Association, Washington, DC. This testing of the process, using a high-gravity solid bowl centrifuge for dewatering and reconstitution of fine-cleaned-coal slurry is detailed. Finecleaned-coal slurry was treated with a bitumen emulsion before dcwatering in a high-gravity solid-bowl centrifuge. The treated products appeared to be dry and in a free-flowing granular form, while the untreated products were wet, lumpy, sticky, and difficult to handle. The freezing problem was also alleviated.
97101666 ing process
Ultrafine
coal single-stage
dewatering
and briquet-
Wilson, J. W. and Ding, Y. Truns. Sot. Mitt.. Mrtull., Explor., 1005, (Pub. 1996), 298, l921-lY24iSection 2. Small coal particles are produced during the pulverizing operation of the ultrafine coal-cleaning process. After the coal-cleaning process, these ultrafine particles are very difficult to dewater and create problems in coal transportation, storage and handling at utility plants. Research on ultrafine coal dewatering and briquetting resulted in the development of a singlestage operation that is potentially more effective and economical than conventional thermal drying and briquetting processes. The final coal product has a moisture content of less than 15% and possesses high strength and water resistance that satisfies coal transportation, storage and handling requirements.
Economics,
self-ignition
Business,
Marketing,
Policy
of coal Portola. V. A. Fiz. -Tekh. Prohl. Razmh. folezn. Iskop., 1996, (3). 61-68. (In Russian) A discussion of the factors affecting the autoignition of coal. The most important factor was was found to be a change in the initial temperature of coal. Decreasing the temperature of coal piles in the mine was therefore a recommended step to avoid endogenic fires. 97101661
Evolution
of views on the use of reagents
97101662
tivity through
1996. (6),
I I-14.
97101670 Problems,
(In Russian)
Trans. Sot. Min.. 2.
Metal/.,
Explor.,
1995. (Pub.
Mathematical model for prediction 97101663 in CWS transportation pipeline
1996). 298,
of pressure
drop
Wu, G. et al. Proc. Annu. Int. Pittsburgh Coal Conf: 1995, 12, 542-547. In order to study the pressure drop in CWS pipeline transportation both in laminar and turbulent flow, mathematical models have been developed. In addition, the laminar-turbulent transition criterion for CWS pipeline flow is proposed. The model calculations can be used in drag prediction in the engineering design of a CWS transportation system.
Polymeric moisture sorbent Akvo 97101664 Borts, M. A. ef al. Koks Khim., 1996, (2). 12-16. (In Russian) An investigation into the efficiency of the Akvo acrylate-type moisture sorbent by contacting the latter with a coal flotation concentrate and coal flotation waste containing 25% moisture. The sorbent addition provided a loose consistency to coal even at subzero temperatures and eliminated freezing-up and agglomeration problems during winter transportation of coal.
140
Fuel and Energy Abstracts
coal especially
its
Byproduct coking in decisions, and experience
the
context
of
a city.
Zubitskii, B. D. et al. Koks Khim., 1996, (S), 40-42. (In Russian) Environmental and economic aspects of by-product coking are discussed.
Increasing mine-to-market coal-transport producbetter particle management at the mine face
Kumar, A. et o/. 1911-1912iSection
Bulgarian
Grimmelt, J. el al. Min. Mug., 1996, 175, (4). 220-221. A discussion about the coal mining industry in Bulgaria. adaptation to a new economic climate in the last few years.
in coal
flotation Pikkat-Ordynskii. G. A. Koks Khint.. A review with six references.
97101669
May 1997
97101671 Coal Influence of the characteristics
hydromethanolysis with coke-oven gas 3. coke-oven gas components on the char
Braekman-Damheux, C. et ul. Fuel. 1996. 75, (II), 1274-1278. To improve the economy of the hydropyrolysis process by reducing the hydrogen cost, the use of coke-oven gas instead of pure hydrogen has been proposed. The results show the char obtained after pyrolysis under cokeoven gas pressure is not fundamentally different from those obtained under inert or hydrogen pressure, at least in porosity, optical texture and oxyreactivity in fixed and fluidized beds. The results clearly show the possibility of using coke-oven gas for coal pyrolysis and lead to the conclusion that synergy between metallurgical cokemaking and ‘creaming-off’ coal by hydropyrolysis will be profitable to both processes.
97101672 Gliwice
Coke
In a blast
furnace
used
200 years
ago
in
Sahela, W. Hum-Wad. Hum,. 1996, 63, (8), 283-285. (In Polish) This paper examines charcoal used in blast furnaces in the eighteenth and nineteenth century and the economic effects of using charcoal. A brief description of a ‘coke’ blast furnace that operated in 1796 in Gliwice is presented.
Solid
fuels
(transport,
Transport,
storage)
97101665 Self-heating tests to establish the shipping of solid materials: The case for briquetted peat
Storage
Jones, J. C. J. Fire Sci., 1996, 14, (5). 342-345. This discussion reviews the testing of the self-ignition their application to briquetteted peat.
97101655
Coal handleability-a
Coal log technology
for handling
and transporting
coal fines Liu, H. et al. Cm/ Fines: Uncluinted Fuel, ~Annrr. Tech. Conf.], 2Oth, 1995. 33-37. Edited bv Serkin, S. D. Coal & Slurrv Technology-. Association, Washington. DC: The results of laboratory tests of compaction and extrusion of coal fines into coal logs is the focus of this paper. Preliminary results show that making coal logs is a promising solution to the coal fines problem. A machine has been designed for rapid production of coal logs in commercial settings.
97101657
Coal slurry manufacturing
apparatus
Shimoda, H. and Watanabe, S. Jpn. Kokai Tokkyo Koho JP 08,200,648 [96,200.648] (:CI. F23K1102). 6 Aug 1996, Appl. 95110,008, 25 Jan 1995; 4 pp. (In Japanese) The apparatus for the manufacture of stable coal-water slurries (or CWM) for transportation comprises a hammer crusher for crushing coal into coarse particles, a double-roll crusher for coarse particles, and a recycling means for recycling at least a part of the fine particles to the input side of the double-roll crusher.
Demonstration of mulled coal production, handling, and transportation in existing commercial equipment
97101656
Davis, B. E. et al. Cod Fines: Unclainwd Fuel, [Annu. Tech Conf.], ZOth, 1995, 13-24. Edited by Serkin, S. D. Coal & Slurry Technology Association, Washington, DC. The developmental steps of the technology for treating wet coal fines for improved storage, transportation and handling characteristics are presented.
Engineering and economic aspects of selection 97101659 coal conveying system in Czech underground mines Polak, J. and Drozdek, 554-560.
97lOl660
coals and
good or a bad coal?
Brown, G. J. et al. Part. Part. Syst. Charact., 1996, 13, (4), 260-263. The authors determined the avalanching behaviour of two coal types, one of good and the other of poor handleability characteristics. This revealed significant differences in the nature of flow of the coals. The criteria established will now enable a structured study of the variables that affect handleability and also permit industrial consumers of coal to specify minimum acceptable limits for its transport characteristics.
97101656
of brown
safety
K.
Proc. Annu.
Int. Pittsburgh
Evaluation
of certain
factors
Coal Conf.,
inducing
of
1995, 12,
97101666 The effect of moisture taneous combustibility of coal
condensation
on the spon-
Bhat, S. and Agarwal. P. K. Fuel, 1996. 75, (13), 1523-1532 The current work extends the reaction-diffusion approach developed previously, considering the effects of moisture evaporation and condensation on the rate of oxidation of coal. It is shown that partial wetting of coal or condensation of moisture exerts two competing influences on the overall rate of oxidation. Based on the Insight provided by the model, a simple criterion is derived to determine conditions under which condensation of moisture on coal can lead to spontaneous combustion. This model is thought to be the first mathematical description which links the coamoisture interaction to the potential for spontaneous combustion.
97101667
Process
The utilization of Orimulsion in the for fine coal dewatering and handling
GranuFlow
Wen. W. -W. and Killmeyer, R. P. .‘%rp$. Coal Firres: Uncluimcd I;‘wl. Pup. Int. Tech. Conf: Coal Util. Furl Swt.. Z/.st. 1996, 69-70. Edited hy Serkin. S. D. Coal & Slurry Technology Association, Washington, DC. This testing of the process, using a high-gravity solid bowl centrifuge for dewatering and reconstitution of fine-cleaned-coal slurry is detailed. Finecleaned-coal slurry was treated with a bitumen emulsion before dcwatering in a high-gravity solid-bowl centrifuge. The treated products appeared to be dry and in a free-flowing granular form, while the untreated products were wet, lumpy, sticky, and difficult to handle. The freezing problem was also alleviated.
97101666 ing process
Ultrafine
coal single-stage
dewatering
and briquet-
Wilson, J. W. and Ding, Y. Truns. Sot. Mitt.. Mrtull., Explor., 1005, (Pub. 1996), 298, l921-lY24iSection 2. Small coal particles are produced during the pulverizing operation of the ultrafine coal-cleaning process. After the coal-cleaning process, these ultrafine particles are very difficult to dewater and create problems in coal transportation, storage and handling at utility plants. Research on ultrafine coal dewatering and briquetting resulted in the development of a singlestage operation that is potentially more effective and economical than conventional thermal drying and briquetting processes. The final coal product has a moisture content of less than 15% and possesses high strength and water resistance that satisfies coal transportation, storage and handling requirements.
Economics,
self-ignition
Business,
Marketing,
Policy
of coal Portola. V. A. Fiz. -Tekh. Prohl. Razmh. folezn. Iskop., 1996, (3). 61-68. (In Russian) A discussion of the factors affecting the autoignition of coal. The most important factor was was found to be a change in the initial temperature of coal. Decreasing the temperature of coal piles in the mine was therefore a recommended step to avoid endogenic fires. 97101661
Evolution
of views on the use of reagents
97101662
tivity through
1996. (6),
I I-14.
97101670 Problems,
(In Russian)
Trans. Sot. Min.. 2.
Metal/.,
Explor.,
1995. (Pub.
Mathematical model for prediction 97101663 in CWS transportation pipeline
1996). 298,
of pressure
drop
Wu, G. et al. Proc. Annu. Int. Pittsburgh Coal Conf: 1995, 12, 542-547. In order to study the pressure drop in CWS pipeline transportation both in laminar and turbulent flow, mathematical models have been developed. In addition, the laminar-turbulent transition criterion for CWS pipeline flow is proposed. The model calculations can be used in drag prediction in the engineering design of a CWS transportation system.
Polymeric moisture sorbent Akvo 97101664 Borts, M. A. ef al. Koks Khim., 1996, (2). 12-16. (In Russian) An investigation into the efficiency of the Akvo acrylate-type moisture sorbent by contacting the latter with a coal flotation concentrate and coal flotation waste containing 25% moisture. The sorbent addition provided a loose consistency to coal even at subzero temperatures and eliminated freezing-up and agglomeration problems during winter transportation of coal.
140
Fuel and Energy Abstracts
coal especially
its
Byproduct coking in decisions, and experience
the
context
of
a city.
Zubitskii, B. D. et al. Koks Khim., 1996, (S), 40-42. (In Russian) Environmental and economic aspects of by-product coking are discussed.
Increasing mine-to-market coal-transport producbetter particle management at the mine face
Kumar, A. et o/. 1911-1912iSection
Bulgarian
Grimmelt, J. el al. Min. Mug., 1996, 175, (4). 220-221. A discussion about the coal mining industry in Bulgaria. adaptation to a new economic climate in the last few years.
in coal
flotation Pikkat-Ordynskii. G. A. Koks Khint.. A review with six references.
97101669
May 1997
97101671 Coal Influence of the characteristics
hydromethanolysis with coke-oven gas 3. coke-oven gas components on the char
Braekman-Damheux, C. et ul. Fuel. 1996. 75, (II), 1274-1278. To improve the economy of the hydropyrolysis process by reducing the hydrogen cost, the use of coke-oven gas instead of pure hydrogen has been proposed. The results show the char obtained after pyrolysis under cokeoven gas pressure is not fundamentally different from those obtained under inert or hydrogen pressure, at least in porosity, optical texture and oxyreactivity in fixed and fluidized beds. The results clearly show the possibility of using coke-oven gas for coal pyrolysis and lead to the conclusion that synergy between metallurgical cokemaking and ‘creaming-off’ coal by hydropyrolysis will be profitable to both processes.
97101672 Gliwice
Coke
In a blast
furnace
used
200 years
ago
in
Sahela, W. Hum-Wad. Hum,. 1996, 63, (8), 283-285. (In Polish) This paper examines charcoal used in blast furnaces in the eighteenth and nineteenth century and the economic effects of using charcoal. A brief description of a ‘coke’ blast furnace that operated in 1796 in Gliwice is presented.