Assessing the quality of iron-ore sinter on the basis of its chemical composition

2009 ◽  
Vol 39 (10) ◽  
pp. 843-846 ◽  
Author(s):  
I. S. Bersenev ◽  
V. I. Klein ◽  
V. I. Matyukhin ◽  
Yu. G. Yaroshenko
Keyword(s):  
Chemical Composition ◽  
Iron Ore ◽  
Iron Ore Sinter

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.

Quality Estimation for the Iron Ore Sinter Obtained via Separate Blend Preparation

2020 ◽  
Vol 844 ◽  
pp. 114-123
Author(s):  
Volodymyr Bochka ◽  
Artem Sova ◽  
Lina Kieush ◽  
Oleksandr Hryshyn ◽  
Alisa Dvoiehlazova
Keyword(s):  
Iron Ore ◽  
Mineralogical Composition ◽  
Equivalent Diameter ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Positive Effects ◽  
Iron Ore Sinter ◽  
Iron Ore Sintering Process ◽  
Ore Sintering

This paper reveals that obtaining high-quality sinter, improved or stabilized by its size and strength, is a challenge to be solved by embracing both the formation of sinter with the strong structure and the optimal mineralogical composition of its bonds during the preparation of the sintering blend. The existing technological schemes of iron ore sintering do not allow producing the sinter where the amounts of fines with 0-0.5 mm of fraction would be less than the typical amounts of 8.1-20.4%. Therefore, the study to establish how the blend preparation with the preliminary made composites affects the parameters of iron ore sintering process and the quality of the resulting sinter has been carried out. It has determined that the use of separate pre-granulation has commonly positive effects on the process of blend preparation, namely it significantly decreases the amount of non-granulated fraction of 0-1 mm and increases the equivalent diameter of the granules, reduces the standard deviation and variation coefficient, indicating the more homogeneous granulometric composition of raw granules.

scholarly journals Characterization of Chemical Composition and Microstructure of Natural Iron Ore from Muko Deposits

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Abraham J. B. Muwanguzi ◽  
Andrey V. Karasev ◽  
Joseph K. Byaruhanga ◽  
Pär G. Jönsson
Keyword(s):  
Chemical Composition ◽  
Iron Ore ◽  
World Market ◽  
Ore Deposits ◽  
Raw Material ◽  
X Ray Diffraction ◽  
Fe Content ◽  
Natural Iron ◽  
Western Uganda

The study aimed at investigating the chemical composition and microstructure of raw iron ore from the deposits in Muko area (south-western Uganda). The quality of this iron ore was evaluated to establish its suitability to serve as a raw material for iron production. Samples were taken from the six hills of Muko ore deposits and tests carried out to establish their composition and properties. X-ray diffraction and scanning electron microscopy were employed in the investigation and chemical analysis performed to determine the compounds constituting the ore. The quality of this ore was compared to generalized world market standards and ores from other nations. It was found that Muko ore is a rich hematite grade with Fe content above 65%. It has little gangue (<6% SiO2 and 3-4% Al2O3) and low contents of the deleterious elements (P~0.02% and S<0.006%), which correspond to acceptable levels for commercial iron ores.

scholarly journals Advances in Optical Image Analysis Textural Segmentation in Ironmaking

2020 ◽  
Vol 10 (18) ◽  
pp. 6242 ◽  
Author(s):  
Eugene Donskoi ◽  
Andrei Poliakov
Keyword(s):  
Image Analysis ◽  
Chemical Composition ◽  
Software Package ◽  
Iron Ore ◽  
Optical Image ◽  
Point Counting ◽  
Analysis Software ◽  
Image Analysis Software ◽  
Iron Ore Sinter ◽  
Feedstock Material

Optical image analysis is commonly used to characterize different feedstock material for ironmaking, such as iron ore, iron ore sinter, coal and coke. Information is often needed for phases which have the same reflectivity and chemical composition, but different morphology. Such information is usually obtained by manual point counting, which is quite expensive and may not provide consistent results between different petrologists. To perform accurate segmentation of such phases using automated optical image analysis, the software must be able to identify specific textures. CSIRO’s Carbon Steel Futures group has developed an optical image analysis software package called Mineral4/Recognition4, which incorporates a dedicated textural identification module allowing segmentation of such phases. The article discusses the problems associated with segmentation of similar phases in different ironmaking feedstock material using automated optical image analysis and demonstrates successful algorithms for textural identification. The examples cover segmentation of three different coke phases: two types of Inert Maceral Derived Components (IMDC), non-reacted and partially reacted, and Reacted Maceral Derived Components (RMDC); primary and secondary hematite in iron ore sinter; and minerals difficult to distinguish with traditional thresholding in iron ore.

scholarly journals Effect of Cooling Methods on the Strength of Silico-ferrite of Calcium and Aluminum of Iron Ore Sinter during the Cooling Process

Metals ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 402
Author(s):  
Xu Zhang ◽  
Hao Bai ◽  
Xin Lu ◽  
Tian He ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Iron Ore ◽  
Cooling Process ◽  
Slow Cooling ◽  
Iron Ore Sinter ◽  
Mass Fractions ◽  
Mechanical Strengths ◽  
Biot Numbers ◽  
Cooling Methods

In the iron making process, a high mechanical strength is favorable for iron ore sinters in the blast furnace, and the bonding phase is regarded as one of the key components that determines the quality of the iron ore sinter, in which the silico-ferrite of calcium and aluminum (SFCA) is one of the typical phases. In this study, synthesized samples with different SFCA mass fractions were prepared to study the effect of different cooling methods on the strengths of the SFCA samples. The results showed that the strength of a sample could be improved by increasing the SFCA content during a temperature change. Further, the test results for the compressive strength suggested that the SFCA had a positive effect on the strength of the iron ore sinter during cooling, with slow cooling being significantly effective at preventing the generation of thermal stress. Moreover, the Biot number was introduced to normalize all of the cooling methods. The results showed that higher mechanical strengths for iron ore sinters will be obtained with higher SFCA content and lower Biot numbers, which will guide the evaluation of mechanical strength of iron ore sinter after the cooling process in industry.

scholarly journals Increasing the efficiency of blast-furnace smelting by improving the quality of iron ore materials

2019 ◽  
pp. 43-60
Author(s):  
A.S. Nesterov ◽  
L.I. Garmash
Keyword(s):  
Blast Furnace ◽  
Cast Iron ◽  
Chemical Composition ◽  
Coke Consumption ◽  
Iron Ore ◽  
Raw Materials ◽  
Blast Furnace Smelting ◽  
Blast Furnace Dust ◽  
Sinter Mixture

It is noted in the work that when mastering the technology of pulverized coal injection (PUT) at the metallurgical enterprises of Ukraine, it is necessary to intensify work, including research, in the direction of improving the quality characteristics of the sinter, the stability of its chemical composition and strength parameters. The analysis of the quality of iron ore raw materials used in sintering production in Ukraine and foreign countries is carried out. The requirements of international and domestic standards for the quality of raw materials and fuels, providing for the injection of large quantities of firearms into the furnace, are given. A methodology for determining the quality of raw materials developed in the HMI is described. The results of a study of the quality of iron ore raw materials according to the developed method are presented. Based on the analysis of the results of the research, requirements were developed for the quality of granular iron ore wastes and their rational amount in the composition of the sinter charge, and the process for the production of granules was developed. Recommendations have been developed on the use in the sinter mixture of a part of the granular components of secondary waste, which allowed to increase the content of secondary resources in the mixture. As a result, the chemical composition of the sinter was stabilized, its strength was improved, the yield of sinter of the second grade was reduced, the removal of blast furnace dust and coke consumption were reduced. Improving the quality of the sinter and the rational distribution of charge materials over the cross-section of the top of the blast furnace allows for self-renewal of the protective skull, to reduce the removal of top dust by 4.3 kg / t of cast iron, and to reduce coke consumption by 19.6 kg / t of cast iron. The developed measures make it possible to increase the competitiveness of products, even at the additional cost of preparing the sinter mixture for sintering.

scholarly journals The potential of using of alkaline earth bentonite clays of Ukraine in the production of iron ore pellets

2020 ◽  
Vol 1,2020 (1,2020 (124)) ◽  
pp. 36-43
Author(s):  
Chuprinov E ◽  
Lyalyuk V ◽  
Zhuravlev F ◽  
Kassim D ◽  
Lyakhova I
Keyword(s):  
Chemical Composition ◽  
Alkaline Earth ◽  
Iron Ore ◽  
Bentonite Clay ◽  
Rheological Characteristics ◽  
Iron Ore Pellets ◽  
Ore Pellets ◽  
Exchange Complex ◽  
Bentonite Clays

Objective: to analyze and determine the potential of alkaline earth bentonite clays of Ukraine for use as a binder in the production of iron ore pellets. Methods: performing rheological studies of bentonite clay samples and their chemical analysis, electron microscopic studies of samples. Results: the analysis of the chemical composition and requirements for the rheological characteristics of bentonite clays used in the production of iron ore pellets at metallurgical enterprises of Russia and Ukraine is carried out. The swelling indicators and water absorption of monoionic forms of bentonites of some deposits in water of different hardness are given. The quality of pellets with bentonites, that have a different exchange complex, during an industrial water of various hardness usage is examined. The analysis of the mineralogical and chemical composition, as well as the size and composition of the exchange complex of alkaline-earth bentonite clays of the Cherkassk deposit (Ukraine), which has the largest reserves of such clays in the CIS is carried out. It is shown that clays suitable for the production of pellets are located near the surface of the earth. A comparative analysis of the strength characteristics of pellets using bentonites with an alkaline and alkaline-earth exchange complex is presented. Scientific novelty: it was shown that despite the low swelling of alkaline-earth bentonites, the quality of pellets with these bentonites, in some cases, is slightly lower, and in certain conditions is not inferior to the quality of pellets with alkaline bentonites at the same flow rate. Practical significance: for real industrial conditions it is shown that the increase in water hardness leads to partial or complete (depending on the value of hardness) replacement of alkaline exchange complex with alkaline earth and conversion of alkaline bentonite clay into alkaline earth with corresponding rheological characteristics, deterioration of lumps and the need to increase the content of bentonite in the charge. In the case of increased hardness of water in the concentrate, it is economically feasible to use in the production of alkaline earth pellets bentonite clay, if it is cheaper than alkaline.

scholarly journals Influence of Iron Ore Fines Feed Size on Microstructure, Productivity and Quality of Iron Ore Sinter

2011 ◽  
Vol 51 (6) ◽  
pp. 922-929 ◽  
Author(s):  
Tekkalakote Umadevi ◽  
Angalakuditi Brahmacharyulu ◽  
Ajay Kumar Roy ◽  
Pradipta Chandra Mahapatra ◽  
Manjunath Prabhu ◽  
...  
Keyword(s):  
Iron Ore ◽  
Iron Ore Sinter ◽  
Iron Ore Fines
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