Influence of Coke Breeze Combustion Conditions on the Emission of NOx in Sintering Process

2015 ◽  
pp. 387-394
Author(s):  
Bo Su ◽  
Sheng-li Wu ◽  
Guo-liang Zhang ◽  
Zhi-gang Que ◽  
Chao-gang Hou
Keyword(s):  
Coke Breeze ◽  
Sintering Process

Research on Influence Law of Fuel Structure for Low-FeO Sintering

2011 ◽  
Vol 201-203 ◽  
pp. 1802-1805
Author(s):  
Miao Lian Bian ◽  
Sheng Li Wu ◽  
Qing Feng Wang
Keyword(s):  
Liquid Phase ◽  
Solid Fuel ◽  
Iron Ore ◽  
Experimental Results ◽  
Coke Breeze ◽  
Partial Substitution ◽  
Liquid Volume ◽  
Sintering Process ◽  
Bonding Phase ◽  
Sintering Condition

Micro–sintering equipment was applied to simulate sintering process of iron ore. FeO content of sinter-samples under different fuel structures was measured, and then the effect of fuel structure on fluidity of liquid phase and strength of bonding phase were analyzed in this paper. The proper fuel structure was finally discussed under low FeO sintering condition. The results show that: when anthracite was adopted as partial substitution of coke breeze as part of solid fuel, FeO of sinter reduces and self-strength of bonding phase increases. Although fluidity of liquid phase reduces, the fluidity index it is still above 0.8, which can meet the liquid volume needed for sintering. When CDQ powder is used as part of solid fuel, FeO of sinter also reduces, but fluidity of liquid phase and self-strength of bonding phase reduce a little due to its low combustibility. Taking experimental results and practical production together into account, it can be concluded that proper fuel structure that meets low FeO sintering should be “70% coke+30% anthracite”.

scholarly journals Effect of recycling blast furnace flue dust as pellets on the sintering performance

2010 ◽  
Vol 42 (3) ◽  
pp. 269-281 ◽  
Author(s):  
N.A. El-Hussiny ◽  
M.E.H. Shalabi
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Primary Source ◽  
Sinter Machine ◽  
Coke Breeze ◽  
Sintering Process ◽  
Steel Company ◽  
Iron And Steel ◽  
Flue Dust ◽  
Sintering Properties

The Egyptian Iron and Steel Company generates a great amount of blast furnace flue dust. The recovery of metals and carbon from this flue dust becomes a very important demand due to the increase of the price of coke breeze and the decrease of the primary source of metals. At the same time, it make the environment more safe by decreasing pollution. Introducing these dust fines in the sintering process proves to be very harmful for different operating parameters. Thus, this study aims at investigating the production of pellets resulting from these fines, using molasses as organic binder and its application in sintering of iron ore. The sintering experiments were performed using flue dust as pellets as a substitute of coke breeze. The results revealed that, sintering properties such as inter strength increases with using the flue dust pellets, while productivity of both the sinter machine and sinter machine at blast furnace yard decreases. Also the vertical velocity of the sinter machine and the weight loss during the reduction of produced the sinter by hydrogen decrease.

scholarly journals Impact of Substituting Coke with Biomass on the Mineralogical Composition of the Iron Ore Agglomerate

Metals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 909
Author(s):  
Mária Fröhlichová ◽  
Róbert Findorák ◽  
Jaroslav Legemza ◽  
Martina Džupková
Keyword(s):  
Alternative Fuels ◽  
Negative Impact ◽  
Microscopic Analysis ◽  
Mineralogical Composition ◽  
Coke Breeze ◽  
Partial Substitution ◽  
Sintering Process ◽  
Measuring Devices ◽  
Hydrolyzed Lignin ◽  
The Impact

Coke breeze is a special type of fossil fuel that significantly contributes to environmental pollution. Therefore, ways and opportunities to reduce its negative impact on climate change are being sought. Alternative fuels constitute one of the opportunities where biomass can play an important role. Biomass represents a new fuel for the sintering process and an attractive way to decrease CO2 emissions. Today, biomass is not considered for complete substitution of coke. Opportunities for its partial substitution are instead being sought. Each type of fuel is characterized by different properties and thus also by an appropriate scope of its substitution in an agglomeration mixture. This study covers the available options and the potential impact of this substitution on the structural and mineralogical composition of the agglomerate. These experiments were carried out by substituting coke breeze with biomass (hydrolyzed lignin). To perform the experimental sintering, a sintering apparatus—laboratory sintering pan (LSP)—was used, which was fully equipped with measuring devices and analyzers. The samples of agglomerates prepared by substituting 0%, 20%, 50% and 86% of coke breeze with biomass (hydrolyzed lignin) in dried form were analyzed by chemical and microscopic analysis-The representation of individual minerals in agglomerates was determined by powder X-ray diffraction analysis. Based on the results of the study regarding the impact of partial coke substitution with biomass on the mineralogical composition of the agglomerate, it can be stated that it is possible to substitute about 50% of coke with lignin in the sintering process. When lignin was used to substitute up to 50% of coke, agglomerates with minimal variations in the chemical and mineralogical composition were produced.

scholarly journals Gasification Reaction Characteristics between Biochar and CO2 as well as the Influence on Sintering Process

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Min Gan ◽  
Wei Lv ◽  
Xiaohui Fan ◽  
Xuling Chen ◽  
Zhiyun Ji ◽  
...  
Keyword(s):  
Fossil Fuels ◽  
Combustion Efficiency ◽  
Coke Breeze ◽  
Sintering Process ◽  
Heat Condition ◽  
Iron Ore Sintering ◽  
Green Production ◽  
Ore Sintering ◽  
Lower Temperature ◽  
Gasification Reaction

For achieving green production of iron ore sintering, it is significant to substitute biochar, which is a clean and renewable energy, for fossil fuels. In this paper, the gasification reaction between CO2 and biochar was investigated. The results showed the initial temperature and the final temperature of the gasification reaction between biochar and CO2 were lower, while the maximum weight loss rate and the biggest heat absorption value were much higher than those of coke breeze, which indicated gasification reaction between the biochar and CO2 occurred rapidly at lower temperature. The gasification activation energy of biochar was 131.10 kJ/mol, which was lower than that of the coke breeze by 56.26 kJ/mol. Therefore, biochar had a higher reactivity and easily reacted with CO2 to generate CO. As a result, when biochar replaced coke powder at equal heat condition in sintering process, the combustion efficiency of fuel decreased and was disadvantage to the mineralization of iron ores at high temperature. With the increase of substitute proportion, the sinter yield, tumble strength, and productivity were decreased. The proportion of biochar replacing coke breeze should not be higher than 40%. By reducing the heat replacement ratio of biochar, the yield and quality of sinter got improved.

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