reducibility of magnetite iron ore
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Features of the Reducibility of Titanomagnetite Iron Ore ...
2020-3-1 The reducibility of titanomagnetite iron ore materials (agglomerate, pellets) with various TiO 2 contents are studied. The mineralogical features of agglomerate and pellets before and after...
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Improvement of Sinter Strength and Reducibility through ...
blending ratio of magnetite ore in sinter mixture, Fe2+ in the iron ore sinter increases, which results in lower reduc-ibility.1) Therefore, in the sintering process, promoting magnetite oxidation to hematite is important for high reduc-ibility. In addition to the above-mentioned effects, oxidation promotion means increase of heat generation, which can cause high sinter strength. Therefore, promoting oxidation of magnetite ore
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Improvement of sinter strength and reducibility through ...
Through magnetite concentration deteriorates reducibility because of high FeO content in sinter product. Such situation makes it to promote oxidation of magnetite iron ore during sintering process for improving sinter reducibility. In addition, promoting oxidation of magnetite possibly increases sinter strength with using oxidation heat is ...
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Fluidization behavior and reducibility of iron ore fines ...
2020-10-1 A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines. Hydrogen was chosen as a reducing agent across a temperature range of 873–1073 K. The magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron formation.
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Improvement of Sinter Strength and Reducibility through ...
2021-5-12 Through magnetite concentration deteriorates reducibility because of high FeO content in sinter product. Such situation makes it to promote oxidation of magnetite iron ore during sintering process for improving sinter reducibility. In addition, promoting oxidation of magnetite possibly increases sinter strength with using oxidation heat.
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REDUCIBILITY TEST OF IRON ORE LUMPS - J-STAGE
The reduction degree was based on the total weight of oxygen which combined with the iron in ore, and measured by means of the loss-in-weight method. It was found that the reduction velocity became higher in the sequence of magnetiterarr;hematiterarr;limonite, and that the higher the porocity of each kind of ores the higher the reduction velocity.
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Fluidization behavior and reducibility of iron ore fines ...
A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines. Hydrogen was chosen as a reducing agent across a temperature range of 873–1073 K. The magnetite ore used exhibited strong sticking behavior after the initiation of metallic iron
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(PDF) Improving reducibility of iron ore pellets by ...
The reducibility of iron ore pellets of a specific chemistry can be improved by the optimization of physical parameters such as induration temperature, improving size distribution of
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Improving reducibility of iron ore pellets by optimization ...
2016-12-29 Reducibility of iron bearing material is one of the important parameter along with the other properties. It is defined as the percentage reduction of iron oxide materials in solid condition in gaseous atmosphere (800-1000 °C).
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Reduction of Iron Oxides with Hydrogen—A Review ...
A typical example is the reduction of iron ore pellets, which consist of small particles. The particles at the outer surface of the pellet get reduced to metallic iron, and the iron
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The influence of prior-oxidation on the reducibility and ...
2020-9-2 The influence of prior-oxidation on the reducibility and fluidization performance of magnetite iron ore. Previous Next. The influence of prior-oxidation on the reducibility and fluidization performance of magnetite iron ore. Heng Zheng. Advisors: Univ.-Prof. Dipl.-Ing. Dr.techn. Johannes Schenk. MeT 2020-08-16T12:27:12+02:00.
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Features of the Reducibility of Titanomagnetite Iron Ore ...
The reducibility of titanomagnetite iron ore materials (agglomerate, pellets) with various TiO2 contents are studied. The mineralogical features of agglomerate and pellets before and after reduction are investigated. Calculations of technical and economic indicators of blast furnace smelting using iron ore materials with different TiO2 contents are carried out.
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Improvement of sinter strength and reducibility through ...
Depletion of high grade iron ore deposits is moving us to use concentrates in sintering process. Through magnetite concentration deteriorates reducibility because of high FeO content in sinter product. Such situation makes it to promote oxidation of magnetite iron ore during sintering process for improving sinter reducibility.
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Reducibility of iron ore pellets and effect of additions ...
1973-12-1 Lime additions (with or without silica) lower the reducibility of sintered hematite and magnetite ore pellets. When silica alone is added, the reducibility of the pellet is not much affected. In the reduction of pellets made from a high-grade iron ore with no lime addition, there is initially rapid internal reduction of hematite to wustite ...
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Improving reducibility of iron ore pellets by optimization ...
2016-12-29 improving reducibility of iron ore by adding metallic Ni containing materials wherein, the catalytic effect for the reduction was generated by the addition of metallic Ni. Presence of Cr 3+ also increases the reducibility of iron oxide by CO due to catalytic effect
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Reducibility of iron ore pellets and effect of additions ...
AbstractThe effect of lime and silica addition on the reducibility, of sintered iron ore and synthetic hematite pellets was investigated. The addition of lime and/or silica (up to about 10% total) to sintered synthetic hematite pellets has little effect on the reducibility at 900°C. Lime additions (with or without silica) lower the reducibility of sintered hematite and magnetite ore pellets.
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Fluidization behavior and reducibility of iron ore fines during ...
2020-1-10 A laboratory fluidized bed reactor was used to investigate the fluidization behavior and reducibility of various iron ore fines. Hydrogen was chosen as a reducing agent across a temperature range of 873–1073 K. The magnetite ore used exhibited strong ...
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Investigation on the Reducibility of Agbaja Iron Ore Lumps
2020-5-14 Investigation on the Reducibility of Agbaja Iron Ore Lumps Ocheri C 1*, Njoku RE 2, Urama NA and Mbah CN 1Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka 2Department of Metallurgical and Materials Engineering, Enugu State University of Science and Technology, Nigeria Introduction Table 1: Chemical composition and estimated reserve of some Nigerian iron ore.
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Reducibility and reduction swelling behaviour of some
2014-6-16 Metallurgical Tests for iron ore pellets. 17.06.2014. Cold Crushing Strength, CCS, ISO 4700 (handling, charging, screening) Low-temperature disintegration, LTD, ISO 13930 (disintegration as hematite reduces to magnetite at the top of the shaft) Advanced Reduction under Load, ARUL (temperature and reduction degree in the cohesive zone) Reducibility
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(PDF) Reducibility of nickeliferous limonitic laterite ore ...
Reducibility of nickeliferous limonitic laterite ore from Central Anatolia. Canadian Metallurgical Quarterly, 2014. Ender Keskinkilic
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The influence of prior-oxidation on the reducibility and ...
2020-9-2 The influence of prior-oxidation on the reducibility and fluidization performance of magnetite iron ore. Previous Next. The influence of prior-oxidation on the reducibility and fluidization performance of magnetite iron ore. Heng Zheng. Advisors: Univ.-Prof. Dipl.-Ing. Dr.techn. Johannes Schenk. MeT 2020-08-16T12:27:12+02:00.
Read More
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Reducibility of iron ore pellets and effect of additions ...
1973-12-1 Lime additions (with or without silica) lower the reducibility of sintered hematite and magnetite ore pellets. When silica alone is added, the reducibility of the pellet is not much affected. In the reduction of pellets made from a high-grade iron ore with no lime addition, there is initially rapid internal reduction of hematite to wustite ...
Read More
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Improvement of Sinter Strength and Reducibility through ...
2021-5-12 Through magnetite concentration deteriorates reducibility because of high FeO content in sinter product. Such situation makes it to promote oxidation of magnetite iron ore during sintering process for improving sinter reducibility. In addition, promoting oxidation of magnetite possibly increases sinter strength with using oxidation heat.
Read More
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Reducibility of iron ore pellets and effect of additions ...
AbstractThe effect of lime and silica addition on the reducibility, of sintered iron ore and synthetic hematite pellets was investigated. The addition of lime and/or silica (up to about 10% total) to sintered synthetic hematite pellets has little effect on the reducibility at 900°C. Lime additions (with or without silica) lower the reducibility of sintered hematite and magnetite ore pellets.
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Study the effect of catalyst (THERMACT-BF) on reduction ...
2021-3-19 high quantities of hematite or magnetite (greater than ~60% iron) are known as "natural ore" or "direct shipping ore", meaning they can be fed directly into iron-making blast furnaces. Iron ore is the raw material used to make pig iron, which is one of the main raw materials to make steel. 98% of the mined iron ore is used to make steel [1].
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Investigation on the Reducibility of Agbaja Iron Ore Lumps
2020-5-14 Investigation on the Reducibility of Agbaja Iron Ore Lumps Ocheri C 1*, Njoku RE 2, Urama NA and Mbah CN 1Department of Metallurgical and Materials Engineering, University of Nigeria, Nsukka 2Department of Metallurgical and Materials Engineering, Enugu State University of Science and Technology, Nigeria Introduction Table 1: Chemical composition and estimated reserve of some Nigerian iron ore.
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Evaluation of Reducibility of Iron ore Fines by Reduction ...
【Abstract】 Direct reduction or smelting reduction technologies as an alternative to the traditional blast furnace process have been developed in recent years which can use iron ore fines directly without prior benefication processes.In order to investigate the reducibility behavior and morphology,iron oxide phases as well as globally traded iron ore fines were tested under various ...
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Reducibility and reduction swelling behaviour of some
2014-6-16 Metallurgical Tests for iron ore pellets. 17.06.2014. Cold Crushing Strength, CCS, ISO 4700 (handling, charging, screening) Low-temperature disintegration, LTD, ISO 13930 (disintegration as hematite reduces to magnetite at the top of the shaft) Advanced Reduction under Load, ARUL (temperature and reduction degree in the cohesive zone) Reducibility
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Factors Affecting the Upgrading of a Nickeliferous ...
2021-3-10 The reducibility was based on the degree of reduction of the oxides of iron, nickel and cobalt to their metallic forms. The nickel reduction degree varied from 19% to 70%, and the reduction process was concluded after 40 min. The reducibility of nickel oxide increased with increasing temperature and the iron content of the ore.
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