scholarly journals Recycling of mill scale in sintering process

2011 ◽  
Vol 43 (1) ◽  
pp. 21-31 ◽  
Author(s):  
N.A. El-Hussiny ◽  
F.M. Mohamed ◽  
M.E.H. Shalabi
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Sinter Machine ◽  
Coke Breeze ◽  
Oxide Content ◽  
Sintering Process ◽  
Mill Scale ◽  
Sintering Machine ◽  
Sinter Strength ◽  
Iron Ore Concentrate

This investigation deals with the effect of replacing some amount of Baharia high barite iron ore concentrate by mill scale waste which was characterized by high iron oxide content on the parameters of the sintering process., and investigation the effect of different amount of coke breeze added on sintering process parameters when using 5% mill scale waste with 95% iron ore concentrate. The results of this work show that, replacement of iron ore concentrate with mill scale increases the amount of ready made sinter, sinter strength and productivity of the sinter machine and productivity at blast furnace yard. Also, the increase of coke breeze leads to an increase the ready made sinter and productivity of the sintering machine at blast furnace yard. The productivity of the sintering machine after 5% decreased slightly due to the decrease of vertical velocity.

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 Granulation of coke breeze fine for using in the sintering process

2010 ◽  
Vol 42 (2) ◽  
pp. 193-202 ◽  
Author(s):  
F.M. Mohamed ◽  
N.A. El-Hussiny ◽  
M.E.H. Shalabi
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Sinter Machine ◽  
Coke Breeze ◽  
Sintering Process ◽  
Reduction Time ◽  
Iron Ore Sinter ◽  
Different Shapes ◽  
Coke Fines ◽  
Furnace Reduction

Coke breeze is the main fuel used in the sintering process. The value of -3+1 mm. represents the most favorable particle size for coke breeze in the sintering process. About 20% of total coke fines (-0.5 mm) are produced during different steps of preparation. Introducing these fines during the sintering process proves to be very harmful for different operating parameters. Thus ,this study aims at investigating the production of granules resulting from these fines using molasses as organic binder and its application in sintering of an iron ore. The results showed that the granules having the highest mechanical properties were obtained with 14.5 wt % molasses addition. The sintering experiments were performed by using coke breeze in different shapes (-3+1 mm in size, coke breeze without sieving and coke breeze granules -3+1 mm). The reduction experiments, microscopic structure and X-ray analysis for the produced sinter were carried out. The results revealed that, all sinter properties (such as shatter test, productivity of sinter machine and blast furnace, reduction time and chemical composition) for produced sinter by using coke breeze with size -3+1 mm and coke breeze granules were almost the same. The iron ore sinter which was produced by using coke breeze without sieving yielded low productivity for both sinter machine and blast furnace. Furthermore, using coke breeze without sieving in sintering of an iron ore decreases the vertical velocity of sinter machine and increases the reduction time.

scholarly journals Iron-Ore Sintering Process Optimization / Optymalizacja Procesu Aglomeracji Rudy Żelaza

2015 ◽  
Vol 60 (4) ◽  
pp. 2895-2900 ◽  
Author(s):  
M. Fröhlichová ◽  
D. Ivanišin ◽  
A. Mašlejová ◽  
R. Findorák ◽  
J. Legemza
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Raw Materials ◽  
Size Composition ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Iron Ore Sinter ◽  
A Charge ◽  
Iron Ore Concentrate

The work deals with examination of the influence of the ratio between iron ore concentrate and iron ore on quality of produced iron ore sinter. One of the possibilities to increase iron content in sinter is the modification of raw materials ratio, when iron ore materials are added into sintering mixture. If the ratio is in favor of iron ore sinter, iron content in resulting sintering mixture will be lower. If the ratio is in favor of iron ore concentrate and recycled materials, which is more finegrained, a proportion of a fraction under 0.5 mm will increase, charge permeability property will be reduced, sintering band performance will decrease and an occurrence of solid particulate matter in product of sintering process will rise. The sintering mixture permeability can be optimized by increase of fuel content in charge or increase of sinter charge moisture. A change in ratio between concentrate and iron ore has been experimentally studied. An influence of sintering mixture grain size composition, a charge grains shape on quality and phase composition on quality of the produced iron sinter has been studied.

Application of Biomass Pellets for Iron Ore Sintering

2021 ◽  
Vol 1045 ◽  
pp. 17-31
Author(s):  
Lina Kieush ◽  
Andrii Koveria ◽  
Zuo Qiao Zhu ◽  
Maksym Boyko ◽  
Artem Sova ◽  
...  
Keyword(s):  
Iron Ore ◽  
Pyrolysis Temperature ◽  
Gas Permeability ◽  
Environmental Issues ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Sinter Strength ◽  
Ore Sintering ◽  
Higher Temperature ◽  
Biomass Pellet

The use of biomass as fuel might solve several technological and environmental issues and overcome certain challenges of sinter production. In particular, as revealed by comprehensive analyses, biomass can be used as fuel for iron ore sintering. In this study, we investigate the use of some raw and pyrolysis-processed biomass pellet types, namely wood, sunflower husks (SFH), and straw, for iron ore sintering. In the experiments, the pyrolysis temperature was set to 673, 873, 1073, and 1273 K, and the proportion of biomass in the fuel composition was set to 25%. It was established that the addition of biofuels to the sintering blend leads to an increase in the gas permeability of the sintered layer. The analysis of the complex characteristics of the sintering process and the sinter strength showed the high potential of wood and sunflower husk pellets pyrolyzed at 1073 and 873 K, respectively, for iron ore sintering. The analysis of the macrostructure of the sinter samples obtained using biomaterials revealed that with higher pyrolysis temperatures; the materials tend to have greater sizes and higher amounts of pores and cracks. The composition analyses of the resultant sinters revealed that with higher temperature, the FeO content of the sinters tends to increase.

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”.

Recovery of blast furnace grade iron ore concentrate from iron ore rejects

2017 ◽  
Vol 114 (2) ◽  
pp. 215
Author(s):  
Dilip Makhija ◽  
Prashant Dixit ◽  
A.K. Mukherjee
Keyword(s):  
Blast Furnace ◽  
Iron Ore ◽  
Iron Ore Concentrate
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