آخرین محصولات
Effect of Fluxing Agents on the Quality and
The relative amounts of these phases depend on various parameters such as the gangue content (CaO, MgO, SiO 2, and Al 2 O 3 ) of iron ore, the amount and type of flux added to the pellet mix, the ...
Utilization of Hydrated Lime as Binder and Fluxing …
As one of the most important iron ore agglomeration pro-cesses, pelletizing possesses some irreplaceable advantages, such as low energy consumption and less exhaust gases and harmful dusts emission compared to the sintering.1) More-over, the metallurgical performances and physical strength of iron ore pellets are better than sinter.
Features of the Iron Ore Pellets Structure Depending on the …
This paper summarizes the data of pellet studies conducted by Torex LLC in the period 2014–2022 and partially published in [12–14]. In particular, a comparison was made of the analysis of the pellets structure from magnetite concentrates with a SiO 2 content of 2.5–4.0% (sample 1), 4.5–6.0% (sample 2) and 6.5–8.3% (sample 3) in the …
Utilization of Hydrated Lime as Binder and Fluxing Agent …
In the production process of fluxed pellets, the type of iron ore and the binder have great influence on the pellet-ization process and pellet quality. In the induration process of …
Influence of flux additives on iron ore oxidized pellets
Request PDF | Influence of flux additives on iron ore oxidized pellets | Six additives, i.e., limestone, lime, magnesite, magnesia, dolomite and light-burned-dolomite, were added for investigating ...
Effect of fluxing agents on reduction degradation behaviour of hematite
During induration at a high temperature, a considerable amount of slag/melt phase forms inside the iron ore pellets, comprising SiO2, Al2O3, CaO, MgO and FeO. After cooling, the slag phase solidifies and acts as an important bonding phase in the finished pellets and influences their room temperature as well as high temperature …
Monitor and Control Concept of Metallurgical Properties of Iron Ore …
The value of pellets as metallurgical products is confirmed by steady increase in their share in total amount of produced iron ore raw stuff [1, 2].During competition for expansion of sales market, the leading positions are occupied by companies producing pellets with such properties as high iron content, resistance against loads …
Effect of Adding Limestone on the Metallurgical …
The most common fluxing materials for iron ore pellet production are limestone (CaCO 3), dolomite (Ca,Mg(CO 3) 2) and olivine (Mg 2 SiO 4), but sometimes magnesite (MgCO 3) is also used. Fluxing agents are used not only to enhance slag formation, but also to improve softening and melting properties and to increase the
Utilization of Lime Fines as an Effective Binder as well as Fluxing …
A laboratory study was carried out to characterize the physical, chemical and mechanical properties of lime fluxed (varying basicity 0–2) hematite iron ore pellets. Lime was used as additive as well as fluxing agent for making iron ore pellets. The effect of additives on different properties of pellets was studied. The findings show that on …
Iron Ore Pelletizing Process: An Overview
The iron ore pelletizing process consists of three main steps: 1. Pelletizing feed preparation and mixing: the raw material (iron ore concentrate, additives anthracite, dolomite and binders are prepared in terms of particle size and chemical specifications, dosed, and mixed together to feed the pelletizing process; ...
Abstract: Keywords:- Indurate briquettes, dolomite …
reduction swelling propertyof iron ore pellets .The experimental results show that with increasing the dolomite dosage from 0 to 10.5% the reduction swelling index (RSI) ... effect of different fluxing agents, namely, limestone, dolomite, magnesite and pyroxenite, on melt formation and microstructure during indurations and on
Kinetic Investigation of Iron Ore Pellets Reduction Produced …
The kinetic investigation for iron ore pellets produced using marble waste has not previously been reported. Thus, the aim of this paper is to investigate the E a and the controller mechanism for reducing iron ore pellets produced using marble waste as the fluxing agent under H 2 atmosphere, and to establish the application of these pellets in …
Diffusion and reaction mechanism of limestone and quartz in fluxed iron
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 …
Influence of flux additives on iron ore oxidized pellets
Six additives, i.e., limestone, lime, magnesite, magnesia, dolomite and light-burned-dolomite, were added for investigating their influences on the pellet quality. For …
Porosity of Iron-Ore Pellets at Different Stages of Roasting …
DOI: 10.3103/s096709122370002x Corpus ID: 268630024; Porosity of Iron-Ore Pellets at Different Stages of Roasting and Reduction @article{Bersenev2023PorosityOI, title={Porosity of Iron-Ore Pellets at Different Stages of Roasting and Reduction}, author={I. S. Bersenev and I. S. Vokhmyakova and N. K. Ozornin and S. I. Pokolenko and E. R. …
Effect of adding limestone on the metallurgical properties of …
In order to produce high-quality pellets with good reducibility and superior softening and melting properties, certain additives are important. One of the most …
METALLURGICAL USES FLUXES FOR METALLURGY
The production of iron is accomplished by smelting of ores, pellets, and sinter in blast furnaces with subsequent refining of molten iron and scrap in oxygen-blown processes. The electric furnace is used to make steel, stainless steels, ferroalloys, and special alloys, whereas ferromanganese is often made in blast fur- naces.
Utilization of Hydrated Lime as Binder and Fluxing Agent for …
Reduction degradation of red iron ore pellets usually occurs at low temperatures (500 ° C–550 ° C) and has an adverse impact on the operation of blast furnace when a
Effect of Adding Limestone on the Metallurgical Properties of Iron Ore
The Tumbler Index and reducibility of the pellets are reported to increase with the increase in pellet basicity [12, 13]. RDI of iron ore pellets are reported to initially decrease and then ...
Effect of adding limestone on the metallurgical properties of iron ore
The most common fluxing materials for iron ore pellet production are limestone (CaCO 3), dolomite (Ca,Mg(CO 3) 2) and olivine (Mg 2 SiO 4), but sometimes magnesite (MgCO 3) is also used. Fluxing agents are used not only to enhance slag formation, but also to improve softening and melting properties and to increase the …
Effect of Limestone and Dolomite Flux on the Quality of …
The present work illustrates the effect of limestone and dolomite as flux material in pelletization of an Indian goethetic-hematite iron ore with 59.75% Fe, 4.52% …
Effect of fluxing agents on reduction degradation behaviour of hematite
Abstract. During induration at a high temperature, a considerable amount of slag/melt phase forms inside the iron ore pellets, comprising SiO 2, Al 2 O 3, CaO, MgO and FeO.After cooling, the slag phase solidifies and acts as an important bonding phase in the finished pellets and influences their room temperature as well as high temperature …
Effect of Adding Limestone on the Metallurgical …
Introduction. In general, the main types of pellets for the purposes of making iron are acid, basic and fluxed. order to produce high-quality pellets, certain additives are important. …
Influence of the Iron Ore Pellets Macrostructure on Their …
Abstract The quality of iron ore pellets significantly affects the efficiency of pig iron and HBI production. The purpose of the work is to assess the potential for increasing the strength of iron ore pellets based on their macrostructure control. As a result of the study, it is found that the compressive strength of the pellets decreases …
Utilization of Lime Fines as an Effective Binder as well as Fluxing …
The effect of lime addition in hematite iron ore pellets on its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with varying basicity i.e. 0-2.0.Increasing addition lime produced more calcium-alumino-silicate phases (slag) as evidenced by SEMEDAX analysis.
Effect of limestone and dolomite flux on the quality of …
A combination of limestone and dolomite is recommended as a suitable fluxing agent for the preparation of iron ore fluxed pellets. Thermogravimetric studies …
Flux for Metallurgy
Selection of flux is related to the metals to be extracted and the composition of ore. Steel-making usually uses CaO-Al 2 O 3-SiO 2 slag, while the ashes in iron ore and coke are mostly acidic oxides (SiO 2), so alkaline flux (limestone or dolomite) is usually used.Smelting of nonferrous metals usually uses FeO-SiO 2, FeO-CaO-SiO 2, FeO-Al 2 …
Characterization of Fluxed Iron Ore Pellets as Compared to …
The effect of lime addition in hematite iron ore pellets on its physico-chemical as well as mechanical properties with respect to blast furnace requirement was studied in a laboratory scale with ...
Effect of fluxing agents on the swelling behavior of hematite pellets …
The following materials were used for preparing the green pellets: iron ore fines, bentonite, anthracite coal, limestone, pyroxenite and magnesite. ... the addition of fluxing agents to achieve good mechanical strength and metallurgical properties of the fired hematite pellets [9–14]. Fluxing agents are the main source of basic oxides in the ...
CO 2 -Free Flux for Sustainable Iron Ore Pelletizing
The iron and steel manufacturing sector directly accounts for 7–9% of global CO2 emissions. Raw material preparation, such as iron ore sintering, pelletizing, and cock making, is the major CO2 emitter. As climate change becomes a bigger concern, steel manufacturers need to lower CO2 emissions without hindering efficiency or increasing …
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