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 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 A Hybrid Ensemble Model Based on ELM and Improved AdaBoost.RT Algorithm for Predicting the Iron Ore Sintering Characters

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Sen-Hui Wang ◽  
Hai-Feng Li ◽  
Yong-Jie Zhang ◽  
Zong-Shu Zou
Keyword(s):  
Energy Efficiency ◽  
Fuel Consumption ◽  
Iron Ore ◽  
Threshold Value ◽  
Ensemble Model ◽  
Sintering Process ◽  
Regression Problem ◽  
Iron And Steel ◽  
Iron Ore Sintering ◽  
Ore Sintering

As energy efficiency becomes increasingly important to the steel industry, the iron ore sintering process is attracting more attention since it consumes the second large amount of energy in the iron and steel making processes. The present work aims to propose a prediction model for the iron ore sintering characters. A hybrid ensemble model combined the extreme learning machine (ELM) with an improved AdaBoost.RT algorithm is developed for regression problem. First, the factors that affect solid fuel consumption, gas fuel consumption, burn-through point (BTP), and tumbler index (TI) are ranked according to the attributes weightiness sequence by applying the RReliefF method. Second, the ELM network is selected as an ensemble predictor due to its fast learning speed and good generalization performance. Third, an improved AdaBoost.RT is established to overcome the limitation of conventional AdaBoost.RT by dynamically self-adjusting the threshold value. Then, an ensemble ELM is employed by using the improved AdaBoost.RT for better precision than individual predictor. Finally, this hybrid ensemble model is applied to predict the iron ore sintering characters by production data from No. 4 sintering machine in Baosteel. The results obtained show that the proposed model is effective and feasible for the practical sintering process. In addition, through analyzing the first superior factors, the energy efficiency and sinter quality could be obviously improved.

Beneficiability Study of the Blast Furance Dust from Tangshan Iron and Steel Company

2013 ◽  
Vol 712-715 ◽  
pp. 420-423 ◽  
Author(s):  
Jin Xia Zhang ◽  
Fu Sheng Niu ◽  
Li Li ◽  
Jun Xie
Keyword(s):  
Blast Furnace ◽  
Laboratory Test ◽  
Recovery Rate ◽  
Test Results ◽  
Steel Company ◽  
Iron And Steel ◽  
Expected Effect ◽  
Blast Furnace Dust ◽  
Iron Concentrate ◽  
Laboratory Test Results

Through the analysis and study the properties, characteristics and present conditions of the flue slime of blast furnace dust, a suggestion was made of recovering carbon and iron concentrate from the blast furnace dust using a beneficiation technology consisting of gravity separation-flotation. The laboratory test results indicated that it can obtain the iron/carbon concentrate with a grade of iron 53.41%, carbon 65.21% at a recovery rate of iron 51.33%, carbon 69.29%. This mineral processing technology achieved good technical and economical results, reaching the expected effect. The technology can be applied in production and popularized.

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”.

Crystallization Behavior during Preparation of Glass-Ceramics from BF Slag of Baotou Iron and Steel Company

2012 ◽  
Vol 581-582 ◽  
pp. 836-841
Author(s):  
Yi Ci Wang ◽  
Jian Liang Zhang ◽  
Qi Jiang ◽  
Guo Ping Luo ◽  
Wen Wu Yu
Keyword(s):  
Blast Furnace ◽  
Crystallization Behavior ◽  
Glass Ceramics ◽  
Reference Value ◽  
X Ray Diffraction ◽  
Steel Company ◽  
Iron And Steel ◽  
Prepared Glass ◽  
Bf Slag ◽  
Furnace Slag

In this paper, the crystallization behavior including crystallization temperature, nucleation temperature, microstructure of glass-ceramics and crystal phase composition during preparation of glass-ceramics by melting method from blast furnace(BF) slag of Baotou iron and steel company, quartz sand and other materials was investigated using differential thermal analysis, X-ray diffraction and scanning electron microscopy. The results show that the crystallization peak temperatures of the parent glasses are 962~966°C when the ratio of blast furnace slag changes from 20% to 50%, and uniform, compact grains in the prepared glass-ceramics are obtained, whose diameters are about 0.2-0.5μm. In addition, the major crystalline phases are identified as diopside(Ca(Mg,Al)(Si,Al)2O6）and diopside containing aluminum(Ca(Mg0.5Al0.5)(Al0.5Si1.5O6), and the mechanical properties of glass-ceramics are good, among which the flexural strength is more than 110Mpa. The results have theoretical guidance meaning and practical reference value for realizing industrial production of preparation of glass-ceramics from BF slag of Baotou iron and steel company.

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