Study of iron content in iron ore concentrate increasing effect on sintering process indices and on metallurgical properties of sinter

2021 ◽  
Vol 77 (10) ◽  
pp. 1032-1038
Author(s):  
G. E. Isaenko ◽  
D. A. Kovalev ◽  
N. S. Meshcheryakov ◽  
V. G. Mikhailov ◽  
D. S. Kim
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Raw Material ◽  
Strength Increase ◽  
Sintering Process ◽  
Sinter Production ◽  
Cold Strength ◽  
Metallurgical Properties ◽  
Iron Concentrate ◽  
Iron Ore Concentrate

Effectiveness of blast furnaces operation in many respects depends on metallurgical properties of agglomerate, in particular, iron content in the sinter and its basicity. At the same time, it is accepted that usage of iron ore concentrates with iron content more than 66–67% for sinter production results in decreasing of its strength. As a result of the planned modernization of the technological sections of the concentration plant JSC “Stoilensky GOK”, iron content in the concentrate will be increased to 68–70%. It makes it actual to accomplish comprehensive studies of metallurgical properties of the sinter while increasing iron content in the raw material. Results of the study of sinter properties presented, the sinter being obtained with utilization of iron concentrate with iron content 66.6 % (base), 68.0 and 69.2 % (exp. 1 and exp. 2 correspondently). The iron ore mixture for all the stages was the same and consisted of iron ore concentrate – 78.3%, sintering ore – 8.0%, lime – 5.5% and sintering additives (sludge, dust, scale) – 8.2%. The sintering mixtures composition for all the study stages differed only by fluxes and iron ore mixture consumption. 18 test sintering operations at three values of basicity 1.6, 1.8 and 2.0 units were accomplished. It was established that increase of iron content in the concentrate and basicity of the sinter results in improving of the sintering process indices, increase of the vertical sintering rate, sintering machines productivity, recovery and the sinter cold strength. Increase of the sinter basicity and its production with increased content of iron results in improving RDI indices at low temperature reducing. Results of the study of porosity indices and metallurgical properties of the sinter presented, in particular the collapsibility during reducing and temperature interval softening-melting presented. The advisability of concentrate with increased iron content utilization in the iron ore mixture shown.

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.

Study on the Effect on Sintering Mineralization of Iron Ore

2013 ◽  
Vol 652-654 ◽  
pp. 2538-2542 ◽  
Author(s):  
Xiao Hui Fan ◽  
Ying Li ◽  
Xu Ling Chen
Keyword(s):  
Grain Size ◽  
Regression Analysis ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Material ◽  
Sintering Process ◽  
Main Effect ◽  
Relationship Model ◽  
Ore Mineralization ◽  
The Relationship

The main effect on iron ore mineralization performance in the sintering process is the grain size of raw material and chemical composition. The results show that -0.5mm particles can mineralize, but +0.5mm particles remain a nucleus in sinter. This paper analyses the effect of the chemical composition on mineralization characteristics of liquid production. The relationship model is established by using regression analysis between the chemical composition and liquid formation characteristics. The mian factors of mineralization in the chemical composition: SiO2, CaO, MgO and Al2O3.

The Optimal Content of Liquid Glass in the Raw Material Mixtures in the Briquettes Production

2020 ◽  
Vol 989 ◽  
pp. 678-683
Author(s):  
Leonid I. Polyansky ◽  
Nikolai A. Babailov ◽  
Yuri N. Loginov
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Liquid Glass ◽  
Iron Ore ◽  
Mechanical Characteristics ◽  
Raw Material ◽  
Minimum Amount ◽  
Technological Line ◽  
Iron Ore Concentrate

The results of the mechanical characteristics determining the briquettes during the roll briquetting of the raw mixtures are presented. The fine fractions briquetting process of iron ore concentrate and ferrosilicon manganese with the liquid glass as a binder was investigated. The mechanical strength briquettes data for low and high stresses of the mixtures briquetting are obtained. According to the results of the briquettes test for dropping and crushing, the minimum amount values of binder in the mixtures are obtained. They provide a sufficient level of the briquette mechanical properties. The automated technological line for roll briquetting of raw mixtures with a binder is presented.

Fundamental Research of Sintering Process on Improving the Tumbler Strength of Low SiO2 Sinter

2011 ◽  
Vol 391-392 ◽  
pp. 844-848 ◽  
Author(s):  
Zi Wei Ying ◽  
Man Sheng Chu ◽  
Jing Kun Yu ◽  
Li Xian Xu
Keyword(s):  
Laboratory Condition ◽  
Iron Ore ◽  
Sintering Process ◽  
Degradation Index ◽  
Iron Concentrate ◽  
Fundamental Research ◽  
Series Of Experiments

In the laboratory condition, a series of experiments were carried out in a sintering pot in order to improve the tumbler strength of low SiO2 sinter. The results shows that the content of SiO2 is decreased from 4.4wt% to 3.9wt% when the ratio of serpentine is decreased from 2.2wt% to 1.0wt%, as a result, the tumbler strength and the reduction degradation index of sinter all fall down. When the ratio of serpentine is further decreased, all kinds of sintering indexes fall down rapidly. If the basicity of sinter is increased from 1.75 to 1.85, and 5wt% iron concentrate is added in sintering mixture, the content of SiO2 can be decreased to 3.9wt%~4.0wt%, meanwhile, the tumbler strength of sinter is the same as that of the reference sinter with 4.4wt% SiO2. When Niuman iron ore, Hainan iron ore and Hamosili iron ore are used as the hearth layer instead of sinter, and the basicity of sinter is increased to 1.85, the tumbler strength of sinter with 3.9wt%~4.0wt%SiO2 is the same as that of the reference sinter with 4.4wt% SiO2.

scholarly journals ANALYSIS OF TECHNOL SIS OF TECHNOLOGICAL POSSIBILI OGICAL POSSIBILITIES OF FERRIC TIES OF FERRIC RECOVERY BY NON-CONVEN Y NON-CONVENTIONAL REDUCING A AL REDUCING AGENTS

2019 ◽  
Vol 2019 (2) ◽  
pp. 50-55
Author(s):  
P Khayrullaev ◽  
U Farmanov
Keyword(s):  
Carbon Monoxide ◽  
Iron Ore ◽  
Raw Material ◽  
Gas Recovery ◽  
Complex Process ◽  
The Republic ◽  
Direct Use ◽  
Iron Ore Concentrate ◽  
Secondary Carbon ◽  
The Ideal

The article discusses the results of the analysis of the technological possibilities of iron recovery of iron-containing concentrate by non-traditional restorers. The restoration of iron from its oxide compounds by direct gas recovery of iron-containing pellets with carbon monoxide is presented. The direct use of the secondary carbon monoxide available in the republic is shown in comparison with the application of complex process processes of carbon monoxide processing and production of intermediate products. It has been established that in order to fully recover iron oxides in the source raw material mass the technological cycle should be repeated several times. As a result, alloys of iron with other metals in iron ore concentrate are formed, as hydrogen is the ideal regenerator.

Walnut Shells as a Potential Fuel for Iron Ore Sintering

2021 ◽  
Vol 1045 ◽  
pp. 127-140
Author(s):  
Lina Kieush ◽  
Andrii Koveria ◽  
Maksym Boyko ◽  
Andrii Hrubyak ◽  
Artem Sova ◽  
...  
Keyword(s):  
Iron Ore ◽  
Negative Impact ◽  
Raw Material ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Walnut Shells ◽  
Iron Ore Sintering Process ◽  
Ore Sintering ◽  
Fine Iron ◽  
The Difference

Iron ore sintering is a predominant process for fine iron ore and its concentrate to be applied in the blast furnace process. However, sintering produces a negative impact on the environment. One of the effective ways to reduce greenhouse gas emissions from iron ore sintering is to use CO2-neutral biomaterials for the fuel needs of this technology. Walnut shells (WNS) are a promising raw material for such fuel substitute. Herein, the effect of the raw and the pyrolyzed WNS with a constant fineness of 3-0 mm on the sintering process and the sinter properties were studied. The proportion of WNS in the fuel composition was set to 25 wt.%. It has been established that the use of WNS pyrolyzed up to 873 K is optimal. Additionally, the difference in the reactivity of WNS and coke breeze has provoked the studies on the influence of the pyrolyzed WNS size on the sintering process. WNS size was set to 1-0, 3-0, 5-0, and 7-0 mm. It has been found that the most optimal both for the iron ore sintering process and the sinter quality is the use of WNS with a particle size of 3-0 mm, subjected to preliminary pyrolysis up to 873 K.

Discrete Wavelet Transfer Based BPNN for Calculating Carbon Efficiency of Sintering Process

2016 ◽  
Vol 20 (7) ◽  
pp. 1070-1076 ◽  
Author(s):  
Xiaoxia Chen ◽  
◽  
Jinhua She ◽  
Xin Chen ◽  
Min Wu ◽  
...  
Keyword(s):  
Predictive Model ◽  
Iron Ore ◽  
Back Propagation ◽  
Raw Material ◽  
Discrete Wavelet ◽  
Sintering Process ◽  
Iron Ore Sintering ◽  
Carbon Efficiency ◽  
Iron Ore Sintering Process ◽  
Ore Sintering

Iron ore sintering process is the secondary most energy consuming procedure in steel making industry. In this study, a discrete wavelet transfer based back-propagation neural network (BPNN) model is built to predict the carbon efficiency of an iron ore sintering process. The raw-material variables and manipulated variables are chosen to be the inputs of the predictive model. First, the input variables are decomposed into 5 components. Then, BPNN models of each component are built. Finally, the prediction results are obtained by adding the output from each wave series. Actual run data are collected to verify the validity of the predictive model. The results show the validity of the proposed method with a MSE of 0.7708, a MAPE of 0.0125, and a <span class="bold">R</span>2 of 0.7016.

ELECTRON MICROSCOPIC STUDY МAGNETITE IRON CONCENTRATE EXPOSED TO HIGH COMPACTION PRESSURE

2016 ◽  
Vol 1 (12) ◽  
pp. 174-182 ◽  
Author(s):  
Матюхин ◽  
Pavel Matyukhin
Keyword(s):  
High Pressure ◽  
Microscopic Study ◽  
Electron Microscopic Study ◽  
Iron Ore ◽  
Compaction Pressure ◽  
Aluminum Matrix ◽  
Electron Microscopic ◽  
Iron Concentrate ◽  
Surface Modified ◽  
Iron Ore Concentrate

This article presents the results of electron–microscopic study of samples surface–modified finely divided magnetite iron ore concentrate subjected to high pressure molding. Magnetite used as a filler in the development and design of new types of radiation protective materials, including materials based on aluminum matrix.

Complete Processing of the High-Iron Content Red Mud

2019 ◽  
Vol 946 ◽  
pp. 569-574 ◽  
Author(s):  
Irina V. Loginova ◽  
Aleksei V. Kyrchikov
Keyword(s):  
Cast Iron ◽  
Red Mud ◽  
Iron Content ◽  
Weak Acid ◽  
Raw Material ◽  
High Iron Content ◽  
Titanium Slag ◽  
High Iron ◽  
Iron Concentrate ◽  
Complete Processing

When bauxites from the Middle Timan and Severouralsk deposits are processed into alumina by the low-temperature sintered process the high-iron content red mud can be obtained. The red mud contain up to 58 % of iron and are a potential raw material for ferrous metallurgy. Rare earth elements (REEs) such as Sc, Y and La are converted from bauxites to red mud in the form of hydroxides during processing and are easily leached by weak acid solutions. In this work, the red mud is treated with a solution of sulfuric acid (pH = 2.5–5), the REEs pass into solution, and then the solution is neutralized to obtain a precipitate, i.e. a concentrate of rare elements. The recovery of REEs is about 75–90 % (Sc, Y, La). The high-iron content red mud is converted to the naturally-doped cast iron and titanium slag (up to 50 wt.% TiO2). As a result of processing bauxite, alumina (Al2O3), the naturally-doped cast iron, concentrate of REEs (Sc, Y, La, etc.) and titanium slag (TiO2) are obtained. The flowsheet of the proposed complete processing of the high-iron content red mud is given.

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