Test on High-rate Pulverized Coal Injection Operation at Kimitsu No. 3 Blast Furnace.

Yamaguchi, Kazuyoshi; Ueno, Hideki; Matsunaga, Shigenori; Kakiuchi, Kazumoto; Amano, Shigeru

doi:10.2355/isijinternational.35.148

Cited by 22 publications

(15 citation statements)

References 2 publications

(3 reference statements)

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“…Insufficient burnout of PC may result in the unburnt char in the furnace top gas dust. 1,2) Technology to maximise coal combustion and control permeability is the key to maintaining stable operation. 3,4) Mathematical models, based on reaction kinetics of combustion as well as heat, mass and momentum balances, are regarded as one of the most useful tools for the design and optimisation of pulverised coal combustion devices.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Simulation of Flow and Combustion for Pulverised Coal Injection

Guo

Zulli²,

Rogers

et al. 2005

ISIJ Int.

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A three-dimensional numerical model of pulverised coal injection has been developed for simulating coal flow and combustion in the tuyere and raceway of a blast furnace. The model has been used to simulate previously reported combustion tests, which feature an inclined co-axial lance with an annular cooling gas. The predicted coal burnout agrees well with that measured for three coals with volatile contents and particle size ranging between 20.2-36.4 % and particle sizes 1-200 mm. Many important phenomena including flow asymmetry, recirculating flow and particle dispersion in the combustion chamber have been predicted. The current model can reproduce the experimental observations including the effects on burnout of coal flowrate and the introduction of methane for lance cooling.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional Simulation of Flow and Combustion for Pulverised Coal Injection

Guo

Zulli²,

Rogers

et al. 2005

ISIJ Int.

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show abstract

“…As both coke and Energies 2017, 10, 255 3 of 12 pulverized coal are used as fuel for melter gasifiers, the carbon in the recycling dust may originate from different regions according to researchers [13][14][15][16][17]. The origin of carbon was investigated by petrographic analysis using an OPTON-II polarizing microscope (Carl Zeiss AG, Oberkochen, Germany).…”

Section: Preparation Of Samplesmentioning

confidence: 99%

“…Petrographic analysis was used to distinguish unconsumed coal from unconsumed coke fines according to differential reflectance [13,15]. Petrographic micrographs with a magnification of 480× are shown in Figures 1 and 2.…”

Section: Petrographic Analysismentioning

confidence: 99%

Research on the Combustion Characteristics and Kinetic Analysis of the Recycling Dust for a COREX Furnace

et al. 2017

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Thermogravimetric analysis of recycling dust (RD) from the melter gasifier of COREX, coke1 (C-1), coke2 (C-2) and coal char (CC) under 70% oxygen atmosphere was carried out using thermal balance. The chemical composition and physical structure of the samples were investigated. The characteristic temperatures and comprehensive combustion characteristic indexes were calculated and kinetic parameters during the combustion process were calculated as well using a distributed activation energy model (DAEM). The results show that the carbon in the recycling dust originates from unconsumed CC and coke fines, and the average stacking height of carbon in RD is larger than that of C-1, C-2 and CC. The conversion curves of RD are different from those of C-1, C-2 and CC, and there are two peaks in the RD conversion rate curves. The combustion profiles of RD moves to a higher temperature zone with increasing heating rates. The average activation energies of their combustion process for RD, C-1, C-2 and CC range from 191.84 kJ/mol to 128.31 kJ/mol. The activation energy for recycling dust increases as the fractional conversion increases, but the value for C-1, C-2 and CC decreases with increasing conversion, indicating different combustion mechanisms.

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“…En este período se estableció que, para lograr un consumo total de combustible inferior a 500 kg/ta, el límite superior de carbón inyectado (para 100 % de combustión) debe ser de 180 kg/ta, y que el tamaño de molienda del carbón debe situarse en el 80 % < 0,070 mm (84). En el HA-3 de esta fábrica se han realizado ensayos para conocer la influencia de la inyección de 200 kg/ta sobre el estado térmico del raceway y la zona de toberas (85)(86)(87).…”

Section: Antigua Urssunclassified

Tecnología de fabricación de arrabio con inyección de combustibles y otros materiales por toberas en el horno alto. II parte. Inyección de carbón pulverizado (ICP)

García¹,

Cores

Formoso

et al. 1998

REVMETAL

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Test on High-rate Pulverized Coal Injection Operation at Kimitsu No. 3 Blast Furnace.

Cited by 22 publications

References 2 publications

Three-dimensional Simulation of Flow and Combustion for Pulverised Coal Injection

Three-dimensional Simulation of Flow and Combustion for Pulverised Coal Injection

Research on the Combustion Characteristics and Kinetic Analysis of the Recycling Dust for a COREX Furnace

Tecnología de fabricación de arrabio con inyección de combustibles y otros materiales por toberas en el horno alto. II parte. Inyección de carbón pulverizado (ICP)

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