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03564 Technical trends in the redesign and construction of coke-oven batteries and units for dry quenching of coke
01
Solid fuels (derived solid fuels)
optical texture of the resultant during co-coking was strongly hydrogen transfer properties.
cokes. The coal plastic phase modification affected by both carbonization yield and
Formulation method of coal for coke manufacture gal03549 Yamaguchi, K. and Araki, T. Jpn. Kokai Tokkyo Koho JP 10 36,855 (98 36,855] (Cl. ClOB57/04), 10 Feb 1998, Appl. 96/215,935, 30 Jul 1996, 5 pp. (In Japanese) For charging coal brands to a coke oven, a formulation method is presented. It comprises determining blending ratio of coal brands by calculating the oxygen/carbon atom ratio of each coal brands such that the sum of oxygen/carbon of the coal blend satisfies the equation of DI = a3(0/ C) + C,, where DI = target cold strength of coke and II and Cl are constants determined by the operation states of the coke oven. 98lo3550
Fuel briquets from coal, lignite, peat and cellulose
nitrate Kostochko, A. V. et al. Russ. RU 2,091,446 (Cl. ClOLS/14), 27 Sep 1997, Appl. 94,015,026, 22 Apr 1994. (In Russian). From Izobreteniyo 1997, (27) 312.
Infiltration of metallur ical coke by pyrolysis of CH., and Its effect on enhancement of E SR
gal03551
Shigeno, Y. et nl. 1SIJ In?., 1998, 38, (l), 28-35. Carbon was infiltrated into the metallurgical coke by methane pyrolysis, to modify the coke. As a result, the oxidation rate with COz was lowered and the mechanical strength after partial oxidation was enhanced. CSR (Coke Strength after COz Reaction) of regular coke for a blast furnace increased from about 56 to 77, corresponding to that of the extremely high-grade coke. The mechanism was considered in terms of the pore structure changes and the following conclusions were drawn: original metallurgical coke has a negligibly small volume of micropores, but it increases rapidly during oxidation. In the case of infiltration, carbon deposits mainly in the mesopores. This carbon restricts the rapid increase in the volume of the micropores during oxidation, which depresses the oxidation rate.
Manufacture of fuel from refuse 98lo3552 H + J Gesellschaft fuer Technische Innovationen Mbh Germany Ger. Offen. DE 19,532,099 (Cl. ClOLS/46), 6 Mar 1997, Appl. 19,532,099, 30 Aug 1995, 3 pp. (In German) A medium combustion value fuel can be produced by mixing a fuel with a high combustion value one of low combustion value, such as refuse. The refuse can be predried and the resulting fuel blend can be briquetted. The fuel blend can also be carbonized to produce fuel gas. Manufacture of solid coke fuels and fuel gases from :zz3553 Konishi, T. et al. Jpn. Kokai Tokkyo Koho JP 10 77,489 [98 77,489] (Cl. ClOL3/06), 24 Mar 1998, Appl. 96/231,025, 30 Aug 1996, 12 pp. (In Japanese) The mixtures of coal and liquid carbon-containing materials are cracked at <6OO”C to give gas oils, high-calorific fuel gases and cracking residues. The cracking residues are then carbonized in middle-calorific fuel gases to give carbonization gases and residues. Finally, the carbonization residues are subjected to partial oxidation in an oxygen-containing atmosphere at <12Oo”C to give middle-calorific fuel gases and coke. The method generates a large amount of middle- and high-calorific fuel gases and gas oils, and coke having high strength.
Method and equipment for manufacture of metallurgical coke
gal03554
Irie, H. et al. Jpn. Kokai Tokkyo Koho JP 10 60,450 [98 60,450] (Cl. ClOB39/02), 3 Mar 1998, Appl. 96/224,749, 27 Aug 1996, 7 pp. (In Japanese) Metallurgical coke with upgraded coke quality is manufactured by dropping red-hot coke from coke oven to a pre-chamber of cooling tower of coke dry quenching equipment and introducing combustible gas and oxygen-containing gas to the pre-chamber zone by burners. The red-hot coke is then reheated by combustion at a temperature greater than the coking temperature.
Method of estimation and characteristics for coke heat quantities of coking coal
98/03555
Yoon, K.-H. et al. Hwahok Konghak, 1997, 35, (4) 585-589. (In Korean) By estimating the required coke heat quantities of mixed coals from coke heat quantities of individual coals, this study attempted to effectively use a combustion control system of a coke oven battery. The coke heat quantities for 29 different coals and mixed coals blending 2-20% of individual coals of 10-11 types were measured by the apparatus using double heater which could minimize surface heat loss. The multiplication of coke heat quantities of individual coals by mixing ratios was considerably different from actual measured coke heat quantities of mixed coals. To estimate the coke heat quantities of mixed coals, the calculation by estimating equation that is expressed as a function of coke heat quantities of individual coals, mixing ratios and weighting factor, was in good agreement with real measured values.
336
Fuel and Energy Abstracts September 1998
98lO3556
Microtexture and microstructure of cokes obtained with additions of calcium hydroxide
Butuzova, L. F. er al. Khim. Tverd. Topl., 1997, (4). 21-31. (In Russian) Coke obtained from coal treated with calcium hydroxide has an increased content of both overall and flat lamellas, more domain texture which parallel an increase in the thickness of pore walls.
gal03557 Oxidative semicoking of coal in fluidized bed Merts, R. K. et al. Khim. Tverd. Topl., 1997, (4), 59-68. (In Russian) Active semi-coke is prepared from brown coal and coal by oxidative semicoking in fluidized bed. A pilot two-chamber generator provided the location and the method is efficient, economical and ecologically safe. 9alO3558 Pitch coke as a promising raw material for the electrode industry Seleznev, A. N. and Sherryuble, V. G. Khim. Tverd. Topl., 1997, (6) 7178. (In Russian) Discusses the use of pitch coke as filler or starting material in the manufacture of various carbon-based materials including graphite and electrodes. 96lo3559 Preparation of coal charge for coking Tamko, V. A. et al. U.S.S.R. SU 1,748,434 (Cl. ClOB57/08), 20 Sep 1997, Appl. 4,826,868, 4 Apr 1990 (In Russian). From Izobrereniya 1997, (26) 516. 98lO3560
Preparation of fuel briquets from peat and technological additives
Vasilev, V. F. et al. Russ. RU 2,091,429 (Cl. ClOF7/06), 27 Sep 1997, Appl. 93,019,145, 12 Apr 1993. (In Russian). From Izobrereniyo 1997, (27), 308.
96iO3561 Prerequisites for manufacture of reducing gases and synthesis gas in coke production
Zubilin, I. G. Woks Khim., 1997, (12), 26-28. (In Russian) The prerequisites for the manufacture of reducing gases and synthesis in coke production are discussed.
gas
98lO3562
Process and apparatus for treatment of bituminous material to recover solid, oil, and gas as fuels
Shimada, S. Jpn. Kokai Tokkyo Koho JP 10 46,156 [98 46,156] (Cl. ClOC3/10), 17 Feb 1998, Appl. 96/224,507,7 Aug 1996,5 pp. (In Japanese) The bituminous material is treated by a process which consists of (1) evaporating the material by contacting with combustion gas of lOOO-2000°C after complete combustion, (2) separating solid from the material gas while holding the gas at 200-500°C and (3) recovering oil by cooling the gas. The apparatus, with an evaporator, a liquid-solid separator and liquefaction device is also described. Solid, oil and gas as fuels can be efficiently recovered in a short time and at a low cost. 98lO3563 Sewage sludge disposal process and product Schulz, H. W. U.S. US 5,711,768 (Cl. 44-552; ClOL5/14), 27 Jan 1998, US Appl. 242,532, 13 May 1994, 6 pp. Dehydrated sewage sludge containing 265 wt% of sewage sludge solids are used to make briquettes that are useful as fuel. On a dry basis, the briquettes contain -50-95 wt% sewage sludge solids together with -3-12 wt% lime as binder and fungistat. Organic binders and coking agents may be included to improve resistance to breakage and to impart high crush strength at the elevated temperatures encountered in gasifiers. 98103564
Technical trends in the redesign and construction of coke-oven batteries and units for dry quenching of coke
Rudyka, V. I. and Minasov, A. Russian) The authors present two variants quenching plants. One of them buildings and structures and the yield coke-oven batteries.
N.
Koks Khim., 1997, (ll),
12-16.
(In
of redesign of coke-oven batteries and dry considers maximum use of the existing other assumes construction of new high-
98lO3565
Use of waste lubricant oil from steel rolling mills in the coking process
Alvarez, R. er al. ISIJ hr., 1998, 38, (l), 23-27. This research has principally studied the possibilities of using residual oils from the steel rolling as additives in a coal blend to be carbonized in a coke oven plant and, consequently, to reduce the cost of coking blends. This type of residual oil is classified as a hazardous material difficult to get rid of. The waste oil (tinnol) was treated, prior to the addition to a coking blend, to remove iron particles and reduce water content. Using an installation specially designed for the heating, transportation and pulverization of such oils, it was then added to coking charges. The effect of such oils on the coking process and coke quality has been studied in an experimental coking plant (INCAR, 250 kg movable wall, 6 t ovens). Pilot and semi-industrial scale tests back a possible method for recycling these waste oils by coking.
Solid fuels (derived solid fuels)
optical texture of the resultant during co-coking was strongly hydrogen transfer properties.
cokes. The coal plastic phase modification affected by both carbonization yield and
Formulation method of coal for coke manufacture gal03549 Yamaguchi, K. and Araki, T. Jpn. Kokai Tokkyo Koho JP 10 36,855 (98 36,855] (Cl. ClOB57/04), 10 Feb 1998, Appl. 96/215,935, 30 Jul 1996, 5 pp. (In Japanese) For charging coal brands to a coke oven, a formulation method is presented. It comprises determining blending ratio of coal brands by calculating the oxygen/carbon atom ratio of each coal brands such that the sum of oxygen/carbon of the coal blend satisfies the equation of DI = a3(0/ C) + C,, where DI = target cold strength of coke and II and Cl are constants determined by the operation states of the coke oven. 98lo3550
Fuel briquets from coal, lignite, peat and cellulose
nitrate Kostochko, A. V. et al. Russ. RU 2,091,446 (Cl. ClOLS/14), 27 Sep 1997, Appl. 94,015,026, 22 Apr 1994. (In Russian). From Izobreteniyo 1997, (27) 312.
Infiltration of metallur ical coke by pyrolysis of CH., and Its effect on enhancement of E SR
gal03551
Shigeno, Y. et nl. 1SIJ In?., 1998, 38, (l), 28-35. Carbon was infiltrated into the metallurgical coke by methane pyrolysis, to modify the coke. As a result, the oxidation rate with COz was lowered and the mechanical strength after partial oxidation was enhanced. CSR (Coke Strength after COz Reaction) of regular coke for a blast furnace increased from about 56 to 77, corresponding to that of the extremely high-grade coke. The mechanism was considered in terms of the pore structure changes and the following conclusions were drawn: original metallurgical coke has a negligibly small volume of micropores, but it increases rapidly during oxidation. In the case of infiltration, carbon deposits mainly in the mesopores. This carbon restricts the rapid increase in the volume of the micropores during oxidation, which depresses the oxidation rate.
Manufacture of fuel from refuse 98lo3552 H + J Gesellschaft fuer Technische Innovationen Mbh Germany Ger. Offen. DE 19,532,099 (Cl. ClOLS/46), 6 Mar 1997, Appl. 19,532,099, 30 Aug 1995, 3 pp. (In German) A medium combustion value fuel can be produced by mixing a fuel with a high combustion value one of low combustion value, such as refuse. The refuse can be predried and the resulting fuel blend can be briquetted. The fuel blend can also be carbonized to produce fuel gas. Manufacture of solid coke fuels and fuel gases from :zz3553 Konishi, T. et al. Jpn. Kokai Tokkyo Koho JP 10 77,489 [98 77,489] (Cl. ClOL3/06), 24 Mar 1998, Appl. 96/231,025, 30 Aug 1996, 12 pp. (In Japanese) The mixtures of coal and liquid carbon-containing materials are cracked at <6OO”C to give gas oils, high-calorific fuel gases and cracking residues. The cracking residues are then carbonized in middle-calorific fuel gases to give carbonization gases and residues. Finally, the carbonization residues are subjected to partial oxidation in an oxygen-containing atmosphere at <12Oo”C to give middle-calorific fuel gases and coke. The method generates a large amount of middle- and high-calorific fuel gases and gas oils, and coke having high strength.
Method and equipment for manufacture of metallurgical coke
gal03554
Irie, H. et al. Jpn. Kokai Tokkyo Koho JP 10 60,450 [98 60,450] (Cl. ClOB39/02), 3 Mar 1998, Appl. 96/224,749, 27 Aug 1996, 7 pp. (In Japanese) Metallurgical coke with upgraded coke quality is manufactured by dropping red-hot coke from coke oven to a pre-chamber of cooling tower of coke dry quenching equipment and introducing combustible gas and oxygen-containing gas to the pre-chamber zone by burners. The red-hot coke is then reheated by combustion at a temperature greater than the coking temperature.
Method of estimation and characteristics for coke heat quantities of coking coal
98/03555
Yoon, K.-H. et al. Hwahok Konghak, 1997, 35, (4) 585-589. (In Korean) By estimating the required coke heat quantities of mixed coals from coke heat quantities of individual coals, this study attempted to effectively use a combustion control system of a coke oven battery. The coke heat quantities for 29 different coals and mixed coals blending 2-20% of individual coals of 10-11 types were measured by the apparatus using double heater which could minimize surface heat loss. The multiplication of coke heat quantities of individual coals by mixing ratios was considerably different from actual measured coke heat quantities of mixed coals. To estimate the coke heat quantities of mixed coals, the calculation by estimating equation that is expressed as a function of coke heat quantities of individual coals, mixing ratios and weighting factor, was in good agreement with real measured values.
336
Fuel and Energy Abstracts September 1998
98lO3556
Microtexture and microstructure of cokes obtained with additions of calcium hydroxide
Butuzova, L. F. er al. Khim. Tverd. Topl., 1997, (4). 21-31. (In Russian) Coke obtained from coal treated with calcium hydroxide has an increased content of both overall and flat lamellas, more domain texture which parallel an increase in the thickness of pore walls.
gal03557 Oxidative semicoking of coal in fluidized bed Merts, R. K. et al. Khim. Tverd. Topl., 1997, (4), 59-68. (In Russian) Active semi-coke is prepared from brown coal and coal by oxidative semicoking in fluidized bed. A pilot two-chamber generator provided the location and the method is efficient, economical and ecologically safe. 9alO3558 Pitch coke as a promising raw material for the electrode industry Seleznev, A. N. and Sherryuble, V. G. Khim. Tverd. Topl., 1997, (6) 7178. (In Russian) Discusses the use of pitch coke as filler or starting material in the manufacture of various carbon-based materials including graphite and electrodes. 96lo3559 Preparation of coal charge for coking Tamko, V. A. et al. U.S.S.R. SU 1,748,434 (Cl. ClOB57/08), 20 Sep 1997, Appl. 4,826,868, 4 Apr 1990 (In Russian). From Izobrereniya 1997, (26) 516. 98lO3560
Preparation of fuel briquets from peat and technological additives
Vasilev, V. F. et al. Russ. RU 2,091,429 (Cl. ClOF7/06), 27 Sep 1997, Appl. 93,019,145, 12 Apr 1993. (In Russian). From Izobrereniyo 1997, (27), 308.
96iO3561 Prerequisites for manufacture of reducing gases and synthesis gas in coke production
Zubilin, I. G. Woks Khim., 1997, (12), 26-28. (In Russian) The prerequisites for the manufacture of reducing gases and synthesis in coke production are discussed.
gas
98lO3562
Process and apparatus for treatment of bituminous material to recover solid, oil, and gas as fuels
Shimada, S. Jpn. Kokai Tokkyo Koho JP 10 46,156 [98 46,156] (Cl. ClOC3/10), 17 Feb 1998, Appl. 96/224,507,7 Aug 1996,5 pp. (In Japanese) The bituminous material is treated by a process which consists of (1) evaporating the material by contacting with combustion gas of lOOO-2000°C after complete combustion, (2) separating solid from the material gas while holding the gas at 200-500°C and (3) recovering oil by cooling the gas. The apparatus, with an evaporator, a liquid-solid separator and liquefaction device is also described. Solid, oil and gas as fuels can be efficiently recovered in a short time and at a low cost. 98lO3563 Sewage sludge disposal process and product Schulz, H. W. U.S. US 5,711,768 (Cl. 44-552; ClOL5/14), 27 Jan 1998, US Appl. 242,532, 13 May 1994, 6 pp. Dehydrated sewage sludge containing 265 wt% of sewage sludge solids are used to make briquettes that are useful as fuel. On a dry basis, the briquettes contain -50-95 wt% sewage sludge solids together with -3-12 wt% lime as binder and fungistat. Organic binders and coking agents may be included to improve resistance to breakage and to impart high crush strength at the elevated temperatures encountered in gasifiers. 98103564
Technical trends in the redesign and construction of coke-oven batteries and units for dry quenching of coke
Rudyka, V. I. and Minasov, A. Russian) The authors present two variants quenching plants. One of them buildings and structures and the yield coke-oven batteries.
N.
Koks Khim., 1997, (ll),
12-16.
(In
of redesign of coke-oven batteries and dry considers maximum use of the existing other assumes construction of new high-
98lO3565
Use of waste lubricant oil from steel rolling mills in the coking process
Alvarez, R. er al. ISIJ hr., 1998, 38, (l), 23-27. This research has principally studied the possibilities of using residual oils from the steel rolling as additives in a coal blend to be carbonized in a coke oven plant and, consequently, to reduce the cost of coking blends. This type of residual oil is classified as a hazardous material difficult to get rid of. The waste oil (tinnol) was treated, prior to the addition to a coking blend, to remove iron particles and reduce water content. Using an installation specially designed for the heating, transportation and pulverization of such oils, it was then added to coking charges. The effect of such oils on the coking process and coke quality has been studied in an experimental coking plant (INCAR, 250 kg movable wall, 6 t ovens). Pilot and semi-industrial scale tests back a possible method for recycling these waste oils by coking.