Mathematical simulation and experimental study on coke oven gas injection aimed to low carbon blast furnace ironmaking

Carbon solution loss reaction of coke gasification is one of the most important reasons for coke deterioration and degradation in a blast furnace. It also affects the permeability of gas and fluids, as well as stable working conditions. In this paper, a three dimensional model is established based on the operational parameters of blast furnace B in Bayi Steel. The model is then used to calculate the effects of oxygen enrichment, coke oven gas injection, and steel scrap charging on the carbon solution loss ratio of coke in the blast furnace. Results show that the carbon solution loss ratio of coke gasification for blast furnace B is almost 20% since the results of a model are probably only indicative. The oxygen enrichment and the addition of steel scrap can reduce the carbon solution loss ratio with little effect on the working condition. However, coke oven gas injection increases the carbon solution loss ratio. Therefore, coke oven gas should not be injected into the blast furnace unless the quality of the coke is improved.

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Effect of V2O5 Addition on Oxidation Induration and Swelling Behavior of Chromium-Bearing Vanadium Titanomagnetite Pellets with Simulated Coke Oven Gas Injection into Blast Furnace

ISIJ International ◽

10.2355/isijinternational.isijint-2018-681 ◽

2019 ◽

Vol 59 (6) ◽

pp. 988-997

Author(s):

Wei Dong Tang ◽

Song Tao Yang ◽

Xiang Xin Xue

Keyword(s):

Blast Furnace ◽

Gas Injection ◽

Coke Oven ◽

Swelling Behavior ◽

Coke Oven Gas

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Mathematical Simulation of Blast Furnace Operation With Natural Gas Injection

The 8th International SteelSim Conference ◽

10.33313/503/012 ◽

2019 ◽

Author(s):

M. Chu ◽

Z. Liu ◽

J. Tang

Keyword(s):

Blast Furnace ◽

Natural Gas ◽

Mathematical Simulation ◽

Gas Injection ◽

Furnace Operation ◽

Blast Furnace Operation

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

Volume 4B: Combustion, Fuels, and Emissions ◽

10.1115/gt2019-91360 ◽

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.

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