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03559 Microflotation of coal particles suspensions
01
Solid fuels (preparation)
Method and apparatus for manufacture 96103556 for blast furnace charge Jiang, H. (Assigned to) Anshan Heat Energy Inst., Ministry Industry, Faming Zhuanli Apr. 1995. (In Chinese)
Shenqing
Gongkai
Shuomingshu,
of briquets of Metallurgy CN.1,101,677,
The method comprises hot mixing a proportioned mixture in a double-shaft mixer, spraying molten pitch in the mixture, roll briquetting, and carbonization of the briquets in a carbonizing-baking furnace.
Method Sun, J. Apr.
Faming Zhuanli 1995. (In Chinese)
for molding Shenqing
coal briquettes
Gongkai
Shuomingshu,
using
organic
CN. I, 101,663,
The coal powder is moulded into briquettes by using organic binders containing starch, borax, urea, and formaldehyde resin. The briquettes can be used for gasification.
96103556 Microbial desulfuriration of different coal types Olsson, G. et al., Coal Sci. Techrlol., 1995, 24, (2), 1741-I 744. Describes the microbial desulphurization of seven different coals by the thermophilic archaea Acidianus brierleyi. The objective was 10 elucidate the impact of coal composition on the degree of sulphur removal and jarosite formation.
Microflotation of coal particles suspensions 96103559 Baichenko, A. A. and Baichenko, A. Coal Sci. TechrIo/., 1995, 24, (2), 1561-1564. The factors affecting the efficiency of microflotation water purification are analyzed.
Mineral matter removal by alkali leaching and the 96103560 characterization of remained mineral matter Wang, J. et al., Coal Sci. Technol., 1995, 24, (2). 1573- 1576. The demineralization of an Australian coal with 20% aqueous NaOH at 250” and 4 MPa or with Ca(OH)2 at 300” lowered the m.p. of the coal’s ash. The gasification and liquefaction reaclivities of the NaOH-treated coal decreased.
96103561 New materials by agglomeration of petroleum coke fines Cornejo, N. et al., Fuel, May 1996, 75, (6), 659-663. The agglomeration process is of broad potential use in revaluing fine-sized petroleum coke wastes and waste products known as impalpable fines. These materials were agglomerated in a disc pelletizer with binding agents to obtain pellets with high carbon content, good reactivity and good consolidation in hot and cold environments. Pellets formed with the addition of carboxymethylcellulose and oven-dried at 100°C posses adequate compressive strength and may be used as carburizers, e.g. in steel manufacturing. In steel melting tests the pellets had a high resistance to thermal shock. High levels of steel carburization were obtained, IO a carbon content of approximately 6.1 wt%.
96103562 Novel methods for the organic desulfurization of coal Singh, K. and McWhinnie, W. R. Coal Sci. Technol., 1995, 24, (2), 1725.1728. Discusses how microwave heating is shown to greatly accelerate the reaction of Fe&CO),, with thiophene which leads to the removal of sulphur from the ring. The possible significance of the results 10 coal desulphurization is discussed.
96103563 Oxydesulfurization of coal using trona mineral Yaman, S. and Kucukbayrak, S. Coal Sci. Technol., 1995, 24, (2), 1733.1736. Describes experiments carried OUI on Turkish IignIte samples which has both high pyritic and high organic sulphur contenIs. Some experimental parameters such as temperature, partial pressure of oxygen, concentration and time were investigated.
Partitioning and behavior of coal macerals during dry coal cleaning Stencel, J. M. et al., Coal SC;. Technol., 1995, 24, (2), 1549.1552. Describes a study of fine coal cleaning using dry, triboelectrostatic experimentation. Petrographic analysis showed that, for high volatile A and B bituminous coals, vitrinite macerals were significantly enhanced in the clean-coal, whereas the fusinite + semifusinite + exinite macerals were enhanced in the tailings/minerals. For high volatile C bituminous coal, thih trend in enhancement was not observed. 96103564
254
Fuel and Energy
Abstracts
July
1996
96103565 A performance model for water-only gravity separators treating coal Suresh, N. et al., Fuel, May 1996, 75, (7), 851-854. The conventional method for predicting the performance of coal cleaning units is by plotting a generalized distribution curve, which is cumbersome. The paper outlines attempts to describe the Tromp curve using a RosinRammler type of equation for estimating performance. Experiments were carried out on a laboratory (76 mm) water-only cyclone lo produce Tromp curves of widely varying nature. The results were used for model development. Performance data for different coal washing units such as jigs, tables, spiral concentrators and industrial water-only cyclones were also selected from the literature to check the validity of the model. 96103566 Petrographic and mineral characterization of Balkan coals and their solid waste products from coal preparation Yossifova, M. Coal Sci. Technol., 1995, 24, (l), 135-138. The paper is part of a complex petrographic, mineralogical and chemical investigation on Balkan bituminous coals and their solid waste products from coal preparation. 96103567 Polymeric additives for improving the flow properties of waxy distillate fuels and crudes El-Gamal, I. M. and Al-Sabbagh, A. M. Fuel, May 1996, 75, (6), 743.750. Propenoxylated tetraethylenepentamine adduct was prepared by the reactions of tetraethylenepentamine (TEPA) with propylene oxide. Four alphaolefin-maleic anhydride copolymers previously synthesized were esterified with the synthesized adduct successively. They were also subjected to esterification with saturated long-chain alcohol blend NAFOL 20’ and amidation with TEPA. The prepared polymeric products were purified and characterized, then evaluated for improving the cold flow properties of a waxy gas oil blend and Umbarka waxy crude. In addition, they were compared with a commercial wax dispersant. The results show the high efficiency of these additives in improving the flowability of both distillate fuel and crude, while the filterability of the gas oil blend was slightly ameliorated.
96103566 A preliminary study on split feed flotation of Turkish bituminous coal fines Hosten, C. and Muratoglu, R. A. Fuel, May 1996, 75, (6), 651-653. The possibility of improving the flotation efficiency of Turkish bituminous coal fines by a split feed flotation scheme was investigated in comparison with conventional single-stage flotation. Coal samples collected from the ~0.6 mm fines treatment circuit of an operating washery were used in laboratory batch tests simulating single-stage and split feed flotation circuits. Collector (kerosene) and frother (iso-octanol) additions were used as major test variables. Results were evaluated on the basis of the efficiency index for metallurgical optimization purposes. Split feed flotation appeared to be a better alternative scheme from the metallurgical point of view. Preparation of sulfur-binding additive for coal and coal briquets for decreasing sulfur dioxide emission during combustion Scheuner, H. er al., lhsrgrwd to) Mitteldeutsche Ut-uut~koi~le,lgesellschaft
96103569
mbH, GER. Par. DE.4,420,845,
Process
96103570
for
Dec. 1995.
manufacturing
water-resistant
coal
briquets Banhegyi,
M. et al., (Assigned to) Mecseki Szenbanyak; Geopard Geotechnikai., Koernyezetvedelmi Kutato-Fejleszroe es Szolgaltato Kft., HUNG. TELJES HU.69,506, Sep. 1995. A process for the manufacture water resistant coal briquets is carried out by conventional pressing and using a binder consisting of vinasse 90, bitumen 9.92 and 0.08 porassium or ammonium persulphate. The advantages are related to the use of a waste material from alcohol manufacture vinasse - instead of pitch binder. 96103571 Production of coal maceral concentrates by flotation Kizgut, S. ef al., Coal Sci. Technol., 1995, 24, (2), 1553.1556. Describes an inertinite-rich concentration which is obtained by timed batch flotation of coal, provided the only reagent added was a frother. Of the three frothers tested. MIBC is the most selective.
96103572
iit~id
using
PrFmotion of nitrogen removal during coal pyrqlyIron catalyst Impregnated by solvent swellmg
Hayashi, J. 1. el al., Coal Ser. Technol., 1995, 24, (2), 1697-1700. The paper discusses how two organometallic Fe precursors Fe(OAc), and ferrocene, were impregnated onto 3 coals of different rank swollen in polar organic solvents. The Fe-impregnate coals, as well as the orginal coals, were subjected to slow and atmospheric pyrolysis to determine the effect of Fe species on the fate of fuel-N.
Solid fuels (preparation)
Method and apparatus for manufacture 96103556 for blast furnace charge Jiang, H. (Assigned to) Anshan Heat Energy Inst., Ministry Industry, Faming Zhuanli Apr. 1995. (In Chinese)
Shenqing
Gongkai
Shuomingshu,
of briquets of Metallurgy CN.1,101,677,
The method comprises hot mixing a proportioned mixture in a double-shaft mixer, spraying molten pitch in the mixture, roll briquetting, and carbonization of the briquets in a carbonizing-baking furnace.
Method Sun, J. Apr.
Faming Zhuanli 1995. (In Chinese)
for molding Shenqing
coal briquettes
Gongkai
Shuomingshu,
using
organic
CN. I, 101,663,
The coal powder is moulded into briquettes by using organic binders containing starch, borax, urea, and formaldehyde resin. The briquettes can be used for gasification.
96103556 Microbial desulfuriration of different coal types Olsson, G. et al., Coal Sci. Techrlol., 1995, 24, (2), 1741-I 744. Describes the microbial desulphurization of seven different coals by the thermophilic archaea Acidianus brierleyi. The objective was 10 elucidate the impact of coal composition on the degree of sulphur removal and jarosite formation.
Microflotation of coal particles suspensions 96103559 Baichenko, A. A. and Baichenko, A. Coal Sci. TechrIo/., 1995, 24, (2), 1561-1564. The factors affecting the efficiency of microflotation water purification are analyzed.
Mineral matter removal by alkali leaching and the 96103560 characterization of remained mineral matter Wang, J. et al., Coal Sci. Technol., 1995, 24, (2). 1573- 1576. The demineralization of an Australian coal with 20% aqueous NaOH at 250” and 4 MPa or with Ca(OH)2 at 300” lowered the m.p. of the coal’s ash. The gasification and liquefaction reaclivities of the NaOH-treated coal decreased.
96103561 New materials by agglomeration of petroleum coke fines Cornejo, N. et al., Fuel, May 1996, 75, (6), 659-663. The agglomeration process is of broad potential use in revaluing fine-sized petroleum coke wastes and waste products known as impalpable fines. These materials were agglomerated in a disc pelletizer with binding agents to obtain pellets with high carbon content, good reactivity and good consolidation in hot and cold environments. Pellets formed with the addition of carboxymethylcellulose and oven-dried at 100°C posses adequate compressive strength and may be used as carburizers, e.g. in steel manufacturing. In steel melting tests the pellets had a high resistance to thermal shock. High levels of steel carburization were obtained, IO a carbon content of approximately 6.1 wt%.
96103562 Novel methods for the organic desulfurization of coal Singh, K. and McWhinnie, W. R. Coal Sci. Technol., 1995, 24, (2), 1725.1728. Discusses how microwave heating is shown to greatly accelerate the reaction of Fe&CO),, with thiophene which leads to the removal of sulphur from the ring. The possible significance of the results 10 coal desulphurization is discussed.
96103563 Oxydesulfurization of coal using trona mineral Yaman, S. and Kucukbayrak, S. Coal Sci. Technol., 1995, 24, (2), 1733.1736. Describes experiments carried OUI on Turkish IignIte samples which has both high pyritic and high organic sulphur contenIs. Some experimental parameters such as temperature, partial pressure of oxygen, concentration and time were investigated.
Partitioning and behavior of coal macerals during dry coal cleaning Stencel, J. M. et al., Coal SC;. Technol., 1995, 24, (2), 1549.1552. Describes a study of fine coal cleaning using dry, triboelectrostatic experimentation. Petrographic analysis showed that, for high volatile A and B bituminous coals, vitrinite macerals were significantly enhanced in the clean-coal, whereas the fusinite + semifusinite + exinite macerals were enhanced in the tailings/minerals. For high volatile C bituminous coal, thih trend in enhancement was not observed. 96103564
254
Fuel and Energy
Abstracts
July
1996
96103565 A performance model for water-only gravity separators treating coal Suresh, N. et al., Fuel, May 1996, 75, (7), 851-854. The conventional method for predicting the performance of coal cleaning units is by plotting a generalized distribution curve, which is cumbersome. The paper outlines attempts to describe the Tromp curve using a RosinRammler type of equation for estimating performance. Experiments were carried out on a laboratory (76 mm) water-only cyclone lo produce Tromp curves of widely varying nature. The results were used for model development. Performance data for different coal washing units such as jigs, tables, spiral concentrators and industrial water-only cyclones were also selected from the literature to check the validity of the model. 96103566 Petrographic and mineral characterization of Balkan coals and their solid waste products from coal preparation Yossifova, M. Coal Sci. Technol., 1995, 24, (l), 135-138. The paper is part of a complex petrographic, mineralogical and chemical investigation on Balkan bituminous coals and their solid waste products from coal preparation. 96103567 Polymeric additives for improving the flow properties of waxy distillate fuels and crudes El-Gamal, I. M. and Al-Sabbagh, A. M. Fuel, May 1996, 75, (6), 743.750. Propenoxylated tetraethylenepentamine adduct was prepared by the reactions of tetraethylenepentamine (TEPA) with propylene oxide. Four alphaolefin-maleic anhydride copolymers previously synthesized were esterified with the synthesized adduct successively. They were also subjected to esterification with saturated long-chain alcohol blend NAFOL 20’ and amidation with TEPA. The prepared polymeric products were purified and characterized, then evaluated for improving the cold flow properties of a waxy gas oil blend and Umbarka waxy crude. In addition, they were compared with a commercial wax dispersant. The results show the high efficiency of these additives in improving the flowability of both distillate fuel and crude, while the filterability of the gas oil blend was slightly ameliorated.
96103566 A preliminary study on split feed flotation of Turkish bituminous coal fines Hosten, C. and Muratoglu, R. A. Fuel, May 1996, 75, (6), 651-653. The possibility of improving the flotation efficiency of Turkish bituminous coal fines by a split feed flotation scheme was investigated in comparison with conventional single-stage flotation. Coal samples collected from the ~0.6 mm fines treatment circuit of an operating washery were used in laboratory batch tests simulating single-stage and split feed flotation circuits. Collector (kerosene) and frother (iso-octanol) additions were used as major test variables. Results were evaluated on the basis of the efficiency index for metallurgical optimization purposes. Split feed flotation appeared to be a better alternative scheme from the metallurgical point of view. Preparation of sulfur-binding additive for coal and coal briquets for decreasing sulfur dioxide emission during combustion Scheuner, H. er al., lhsrgrwd to) Mitteldeutsche Ut-uut~koi~le,lgesellschaft
96103569
mbH, GER. Par. DE.4,420,845,
Process
96103570
for
Dec. 1995.
manufacturing
water-resistant
coal
briquets Banhegyi,
M. et al., (Assigned to) Mecseki Szenbanyak; Geopard Geotechnikai., Koernyezetvedelmi Kutato-Fejleszroe es Szolgaltato Kft., HUNG. TELJES HU.69,506, Sep. 1995. A process for the manufacture water resistant coal briquets is carried out by conventional pressing and using a binder consisting of vinasse 90, bitumen 9.92 and 0.08 porassium or ammonium persulphate. The advantages are related to the use of a waste material from alcohol manufacture vinasse - instead of pitch binder. 96103571 Production of coal maceral concentrates by flotation Kizgut, S. ef al., Coal Sci. Technol., 1995, 24, (2), 1553.1556. Describes an inertinite-rich concentration which is obtained by timed batch flotation of coal, provided the only reagent added was a frother. Of the three frothers tested. MIBC is the most selective.
96103572
iit~id
using
PrFmotion of nitrogen removal during coal pyrqlyIron catalyst Impregnated by solvent swellmg
Hayashi, J. 1. el al., Coal Ser. Technol., 1995, 24, (2), 1697-1700. The paper discusses how two organometallic Fe precursors Fe(OAc), and ferrocene, were impregnated onto 3 coals of different rank swollen in polar organic solvents. The Fe-impregnate coals, as well as the orginal coals, were subjected to slow and atmospheric pyrolysis to determine the effect of Fe species on the fate of fuel-N.