Limestone fluxed iron ore pellets are reduced in CO-rich atmosphere generally accompanied by swelling behavior. If the reduction swelling index (RSI) exceeds the normal range (≥20%), it will ...
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With rapid development of the pellet production under the background of …
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Optimized use of limestone–dolomite (1:1) improved the physical and metallurgical properties of the fluxed pellets. Abstract Owing to the depletion of high-grade iron ore quality, many steel plants over the world are now using pellets after beneficiation of low grade ores as blast furnace feed.
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The RDI of the dolomite fluxed pellet (D) is reduced as compared to limestone fluxed pellet (L) since increased MgO content in the fluxed pellet (D) causes less strain in the pellet microstructure during reduction [26]. Download: Download high-res image (163KB) Download: Download full-size image; Fig. 11. Reduction degradation …
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In ironmaking, limestone and dolomite are used in the production of sinter, pellets, and directly in blast furnace as fluxing materials. In case of steelmaking limestone and dolomite are used as lime or calcined dolomite both in the primary steelmaking (basic oxygen furnace, electric arc furnace), and in the secondary steel making processes ...
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The basicity is 1.15 and SiO 2 content is 2.0% in the pellet. The low-silica self-fluxed pellets were used in three large blast furnaces with 5500 m 3 in Shougang Jingtang. The proportion of pellets in burden increased from 28 to 55%, slag rate of blast furnace decreased from 280 to 215 kg/tHM, and the fuel rate decreased from 500 to 480 …
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Guo, Y. et al. Effect of basicity on the reduction swelling behavior and mechanism of limestone fluxed iron ore pellets. Powder Technol. 393, 291–300 (2021).
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Limestone fluxed iron ore pellets are reduced in CO-rich atmosphere generally accompanied by swelling behavior.If the reduction swelling index (RSI) exceeds the normal range (≥20%), it will seriously hinder the stable and anterograde production of iron making. To better guide the industrial production, the effect of binary basicity …
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The cohesive zone is a region of low permeability in a blast furnace. This study shows the impact of the chemical composition of pellets on the metallurgical processes occurring in this region during the iron ore reduction process. Sixteen pellets containing varying contents of MgO, CaO, and SiO2 were investigated. The results …
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Improved pellet quality could be attributed to the formation of sufficient amount of silicate melt in basic pellets and high melting point slag in MgO pellets. Limestone fluxed pellets at 0.8 ...
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Limestone fluxed pellets are highly porous and therefore very reducible …
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Basic Fluxed Pellets P.F. Nogueira and R.J. Fruehan Carnegie Mellon University This paper was presented at the ISS 61st Ironmaking Conference Proceedings in March 2002 in Nashville, Tenn. In predicting the softening and melting behavior of blast fur-nace burden material, several local equilibria, rather than the bulk concentration of its com-
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With rapid development of the pellet production under the background of green development, high-quality iron concentrates were gradually exhausted; thus, using high-silica iron concentrates was expected to be a promising way to relieve resource pressure for pellet production. However, increasing the proportion of high-silica acid …
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Effect of Basicity on Metallurgical Properties of Fluxed Pellets with High MgO Content Zichao YANG, 1,3,4) ... Limestone 0.00 0.00 42.01 3.28 0.82 8.36 0.00 0.26 0.00 0.00 0.00 45.53.
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The increase to the proportion of fluxed pellets in the blast furnace burden is a useful way to reduce the carbon emissions in the ironmaking process. In this study, the interaction between calcium carbonate and iron ore powder and the mineralization mechanism of fluxed iron ore pellet in the roasting process were investigated through …
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pellets in rotary kiln Zongheng Guo, Tielei Tian* & Yuzhu Zhang ... PMC mine Yanshan mine Miaogou mine Dolomite Limestone 0.6 16.93 35.35 42.16 4.87 1.63 0.8 16.92 35.35 40.27 4.80 3.57
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Optimized use of limestone–dolomite (1:1) improved the physical and …
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mances were better than the fired pellets in which bentonite and limestone were used as binder and fluxing agent, respectively. The optical microscopy, SEM/EDS and thermodynamic calculation were employed to clarify the difference between limestone fluxed pellets and hydrated lime fluxed pellets. The
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Fluxed Pellets were made from the mix of pretreated iron fine ores, binder and limestone in a disc pelletier of 0.8z m in diameter and 0.2 m rim depth, rotational speed at 38 rpm and inclined at ...
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Both test pellets were produced in a laboratory-scale pelletizing drum and fired in sample baskets set in the middle of the sintering belt on the same production line as commercial blast furnace pellets. One set of pellets was fluxed slightly with limestone (CaCO 3) and was labelled "non-fluxed", while the other one was highly limestone ...
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When operational in early 2024, Vulcan's plant will be the second such iron …
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To enhance the proportion of domestically manufactured Chinese pellets in the furnace, it is crucial to investigate the impact of calcium flux on the metallurgical characteristics of pellets and analyze the phase evolution behavior during the reduction process of medium‐silica fluxed pellets. This study examines the metallurgical …
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Fluxed pellets containing 10% and 20% limestone were produced in a laboratory balling drum. It was found that the pelletization kinetics were sensitive to the water content of the pellets. The moisture content of iron ore fluxed pellets was calculated proportionally according to the amount of water required by pure iron ore and pure …
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In limestone-fluxed pellets with bentonite as a binder, although formation of calcium ferrite was noted at the basicity of 0.8, its formation in appreciable quantities was delayed until the basicity of 1.6. For the pellets produced with a combination of dolomite and limestone, even at the basicity of 1.6, only minor ...
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Changes in the properties of the initial raw materials and the addition of fluxes lead to changes in the structure and metallurgical properties of pellets: reducibility, reduction strength, and softening and melting temperatures. Porosity, the nature of which determines both the mechanical properties and the rate of reduction in the blast furnace …
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Limestone fluxed pellets were prepared at varying. Indian iron ore fines with high alumina content (~2.5% Al2O3) resulted in poor quality pellets and a study was under taken to establish suitable pellet chemistry through proper fluxing agents. Limestone fluxed pellets were prepared at varying
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The basicity (CaO/SiO 2) has an important influence on the metallurgical properties of fluxed pellet with high MgO content.This paper studied the effect and function of basicity on metallurgical properties of fluxed pellet, such as compressive strength, reduction disintegration, reduction swelling and the softening-melting behaviour systematically with …
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Six additives, i.e., limestone, lime, magnesite, magnesia, dolomite and light-burned-dolomite, were added for investigating their influences on the pellet quality. For green balls, adding lime and light-burned-dolomite makes the wet drop strength decrease firstly, and then increase with further increase of additive dosage. Ca(OH)2 affects the …
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The optical microscopy, SEM/EDS and thermodynamic calculation were employed to clarify the difference between limestone fluxed pellets and hydrated lime fluxed pellets. The effect of basicity on ...
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DOI: 10.1016/j.powtec.2020.10.063 Corpus ID: 226333476; Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore @article{Prusti2020EffectOL, title={Effect of limestone and dolomite flux on the quality of pellets using high LOI iron ore}, author={Pallishree Prusti and Kashinath Barik and Nilima Dash and S. K. Biswal and B. …
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