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 basicity (0 to 0.8) and pyroxenite fluxed pellets at varying MgO contents (0 to 3%) to study their effect on the …

In dolomitized pellets, MgO is reported to be concentrated in magnetite and calcium ferrite during reduction that forms higher melting solid solution 'magnesiowüstite.' Thus, dolomite was considered to be an excellent fluxing material for non-indurated pellets to improve high-temperature reduction properties of iron ore pellets by ...

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% SiO2, 3.84% Al2O3, and 4.85% LOI.

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 …

Iron and Steel Company, and the Dolomite ore from gebel Ataqa Suez, . The chemical composition of iron ore [9] and Do-lomite ore are shown in Table 1 from which it is clear that the mean compounds ...

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 …

The Iron Ore Concentrate produced is mixed with additives viz., Lime, Dolomite, Coke and Bentonite in suitable proportions to meet the required physical and chemical characteristics of the product produced. The mixed material is subjected to the green balling and further to the Indurating Grate, Kiln-Cooler process where the drying, pre-heating ...

Iron ore pelletizing, a crucial step in steel production, utilizes three predominant systems worldwide: the Shaft Furnace system, the Straight Grate system, and the Grate Kiln system. ... These agents encompass binders such as Bentonite or organic binders, fluxing agents like limestone or dolomite, and for Hematite ore, an internal …

The limesone, dolomite, quartz sand and anthracite were finely ground separately in laboratory ball grinder to get suitable fineness for pelletizing and their size distributions are listed in Table 2.The dolomite mainly comprising of CaMg(CO 3) 2 was used to provide MgO and part of CaO for the pellets, and the MgO content in the fired pellets was …

Definition of the Iron Ore Pellets The iron ore pellets for this study were chosen based on a previous study20 that reported the physical properties of nine iron ore pellets with varying amounts of marble waste, bentonite, and fixed coal. Promising results, such as a drop number of 3.5 drops/pellet, tumble strength of 0.56 wt.%,

The results show that the self-fluxing pellet and porous lump ore with high aluminium content caused the Al2O3 content of comprehensive burden to raise 0.26% compared to acid pellet and dense lump ...

The addition of dolomite to iron ore pellets improves high temperature reduction properties, primarily by increasing their softening point and reducibility. This study was made to ascertain the compositional ranges within which dolomite fluxed magnetite pellets show such an improvement over good acid pellets. A variety of compositions with MgO …

M. E. H. Shalabi. ... Min et al [4] illustrated that the six additives, limestone, lime, magnesite, magnesia, dolomite and light-burned-dolomite to iron ore for investigating their influences on ...

Fluxing agents are commonly charged into BF via iron ore agglomerates of sinter or pellet, and they can also be charged directly or together with injected pulverized coal via tuyeres[5]. Sintering is the most widely used and economic agglomeration process to prepare iron ore fines for BF utilization.

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 …

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 properties, especially reduction degradation. Fluxing agents play an important role in

Effect of Fluxing Agents on the Quality and Microstructure of Hematite Pellets. S. Dwarapudi Chandra Sekhar +4 authors B. K. Das. ... The addition of dolomite to iron ore pellets improves high temperature reduction properties, primarily by increasing their softening point and reducibility.

Deposit formation in the coal-fired rotary kiln is frequently found in the production of fluxed iron ore pellets by the grate-kiln process and affects normal production. In this paper, the effects of pellet basicity (CaO/SiO2 mass ratio) on the simulated deposit formation were investigated. The results show that the porosity of deposits samples increases from 30.8 …

Moreover, the pellet production of high basicity from concentrates of the Mikhailovsky iron ore deposit is associated with high costs due to the increased heat treatment, specific fuel consumption and decreased strength of fired pellets . An increase in basicity due to carbonate (limestone, dolomite) fluxing leads to an increase in porosity ...

The three main pellet types for iron making purposes are: acid pellets (B2 < 0.5); basic or fluxed pellets (0.9 < B2 < 1.3), which use limestone (CaCO 3 ) or dolomite (Ca,Mg(CO 3 ) 2 ) as an ...

Raw materials like iron ore fines (Pellet plant feed), dolomite, coke breeze, and bentonite were used for the laboratory pelletization studies. Dolomite alone was used as a fluxing agent to maintain both pellet basicity and MgO. Chemical analysis and size analysis of the raw materials are shown in Tables 1 2, respectively.

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 increasing the addition of lime, more of calcium-aluminosilicate phases were produced as confirmed by SEMEDAX analysis. These phases have low melting points, which ...

The present work investigates the manufacture of high basicity (CaO/SiO2 = 1.45) magnesium containing fluxed pellets with hydrated lime used as binder and fluxing agent. The fired pellets and lump ...

the iron-ore pellets. In addition, particle sizes of the lime sludge, dolomite, and iron ore were analyzed using laser diffraction (CILAS 1064) with water as liquid. 2.2. Production of iron-ore ...

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 ...

Abstract. Indian iron ore fines with high alumina content (~2.5% Al 2 O 3) 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 basicity (0 to 0.8) and pyroxenite fluxed pellets at varying MgO contents (0 to 3%) to …

Iron Ore Pellets are formed from beneficiated or run of mine iron fines. The iron is usually ground to a very fine level and mixed with limestone or dolomite as a fluxing agent and bentonite or organic binders as a binding agent. View Complete Details. Get Latest Price Request a quote. Global Traders. Hospet, Ballari, Karnataka.

of pellets produced from magnetite concentrate of fer-ruginous quartzites of the Mikhailovsky iron ore deposit. Laboratory research results [4, 15, 16] showed that the use of magnesia flux (dolomite) can improve the compressive strength of oxidized pellets. This article is devoted to the study of the process of pellet formation

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. Fluxes are used in all of these processes, and either limestone or lime is the major flux component with some dolomite, dolomitic

Evolution of Structure and Metallurgical Properties of Iron Ore Pellets When Fluxing with Dolomite, JSC Mikhailovsky GOK Named after A.V. Varichev November 2020 Steel in Translation 50(11):788-794