scholarly journals Intensifying the PC conversion in the raceway by means of coke oven gas

2020 ◽  
Vol 76 (1) ◽  
pp. 19-29
Author(s):  
A. Babich ◽  
F. Hippe ◽  
R. Lin ◽  
J.-P. Simoes ◽  
D. Senk
Keyword(s):  
Blast Furnace ◽  
New Technology ◽  
Coke Oven ◽  
Reaction Chamber ◽  
Gas Analysis ◽  
Conversion Degree ◽  
Minor Amount ◽  
Image Analysis System ◽  
Coke Oven Gas ◽  
Local Cooling

Among numerous measures to accelerate the PC conversion within the blast furnace (BF) raceway, local increase of oxygen concentration is the most common one. On the other hand, the presence of cold media (oxygen) in the vicinity of the coal stream might affect its ignition and combustion negatively. A minor amount of coke oven gas (COG) may increase the temperature and consequently accelerate the coal conversion. To examine this effect, laboratory trials under blast furnace simulating conditions were performed using the Multifunctional Injection Rig for Ironmaking (MIRI). The results of the simulation testified a higher conversion degree of coal while adding the COG. The temperature increase is measurable in the reaction chamber and the off-gas stream. Optical microscopy of the original PC particles and residues after reaction confirm the findings of the off-gas analysis and the increase in temperature during the experiments with addition of COG. The thermogravimetric analysis was applied to determine and to compare the behaviour of coal in different atmospheres including an atmosphere with COG. A stand at one tuyère at a modern BF was erected and tests were performed targeting the observation of the ignition behaviour of coal at different COG rates, using a camera image analysis system. Laboratory trials under blast furnace raceway simulating conditions showed, that even a small amount of COG significantly improves the PC conversion degree. A new technology of PC injection, including addition of small amount of COG to the PC transporting gas, aimed at neutralization of the oxygen local cooling effect, elaborated, justified and tested.

Atmospheric Tests of a Full Scale Gas Turbine Burner Fed With Blast Furnace Gas and Coke Oven Gas

2019 ◽  
Author(s):  
Edoardo Bertolotto ◽  
Alberto Amato ◽  
Li Guoqiang
Keyword(s):  
Blast Furnace ◽  
Natural Gas ◽  
Gas Turbine ◽  
Coke Oven ◽  
Full Scale ◽  
Flame Stability ◽  
Coke Oven Gas ◽  
Stability Range ◽  
Blast Furnace Gas ◽  
Inlet Conditions

Abstract The present paper describes atmospheric experimental tests of a new Ansaldo Energia full scale burner which was designed to burn fuels byproduct of steel making processes (mixtures of Blast-Furnace Gas (BFG) and Coke-Oven Gas (COG)), characterized by very low heating values (LHV∼2–3.5 MJ/kg) and very low stoichiometric air/fuel ratios (∼0.5–1 kg/kg). In particular, flame stability and blow-out margins were assessed for different burner variants and fuel compositions such as pure BFG, blends of BFG with increasing content of COG, and also a synthetic mixture of natural gas, hydrogen and nitrogen (NG/H2/N2). Except for pressure, all burner inlet conditions were simulated as in the actual gas turbine engine. The best performing burner among those tested demonstrated an excellent burning stability behavior over a wide operating range and stably burned pure BFG without any supplementary fuel. Furthermore, considering that in most operating concepts gas turbine engines for Ultra-Low BTU applications require a back-up fuel (such as oil, propane or natural gas) to ignite and ramp up or to perform load-rejections, the present atmospheric tests also assessed maneuvers to switch from natural gas operation to syngas operation. Also in this type of dual-fuel operation the burner demonstrated a wide flame stability range.

Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace

2020 ◽  
Vol 34 (11) ◽  
pp. 15048-15060
Author(s):  
Ziguang Zhao ◽  
Xiaobing Yu ◽  
Yansong Shen ◽  
Yuntao Li ◽  
Hui Xu ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Coke Oven ◽  
Coke Oven Gas ◽  
Model Study

scholarly journals Thermal-detoxification equipment and utilization of heat from cokebattery smokestack gases

2019 ◽  
pp. 471-478
Author(s):  
Ewgen Danilin ◽  
Alexander Lobov
Keyword(s):  
Electric Power ◽  
New Technology ◽  
Boiler House ◽  
Coke Oven ◽  
Flue Gases ◽  
Coke Oven Gas ◽  
Waste Recovery ◽  
Power Stations ◽  
Coke Plants ◽  
Power Standard

Kotloenergoprom Stock Co. has developed new technology of thermal rendering harmless andwaste recovering of heat of flue gases from coke-oven batteries in one unit.In 2000, Kotloenergoprom Stock Co. had executed the design of the first in the world Unit ofthermal rendering harmless and waste recovering of heat of flue gases from the coke-oven batteryNo. l installed in "Zaporozhkoks" (65 furnaces, H = 7.0 m, V = 41.6 m3).The complex "Coke-oven battery - Unit" operates in the special mode using automatic processcontrol system. Introduction the above Unit in 2002 had ensured: decrease of NOx contents influe gases from coke-oven battery in 1.5+2 times and CO on 90+ I 00 % with providinginternational norms of ejections; rebuming solid carbon inclusions and combustible components(H2, CH4, CmHn) in flue gases; stabilization of hydraulic mode of coke-oven battery operation;non-shock putting coke-oven battery into operation directly to chimney stack in case of scheduledor accident stopping the Unit; waste recovery of heat of flue gases from coke-oven battery inquantity up to 6.0 Gkal/h; producing up to 85 tph of steam with energetic parameters at additionalcombustion of coke-oven gas (without building new chimney stack), that lets to produceadditionally 6 MWt of electric power;Standard scheme of producing heat and electric power at by-product coke plants applying usualboiler houses and power stations is irrational. The more effective is to apply the scheme ofproducing heat and electric power with simultaneous rendering harmless and waste recovery ofheat of flue gases from coke-oven batteries in the special Units using existing chimney stacks ofcoke-oven batteries.Cost of building the Unit is not more than cost of usual boiler house or power station with equalcapacity.

scholarly journals Improvement in Reduction Behavior of Sintered Ores in a Blast Furnace through Injection of Reformed Coke Oven Gas

2020 ◽  
Vol 60 (10) ◽  
pp. 2218-2227 ◽  
Author(s):  
Kenichi Higuchi ◽  
Shinroku Matsuzaki ◽  
Koji Saito ◽  
Seiji Nomura
Keyword(s):  
Blast Furnace ◽  
Coke Oven ◽  
Coke Oven Gas ◽  
Reduction Behavior

Improving the use of coke-oven gas in blast-furnace smelting

Metallurgist ◽  
1989 ◽  
Vol 33 (9) ◽  
pp. 169-170 ◽  
Author(s):  
P. E. Kovalenko ◽  
A. P. Chebotarev ◽  
V. F. Pashinskii ◽  
V. M. Zamuruev ◽  
I. G. Tovarovskii ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Coke Oven ◽  
Coke Oven Gas ◽  
Blast Furnace Smelting ◽  
Furnace Smelting
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