Products

influence of sio 2 and feo contents in charge on sinter

Influence of SiO2 and FeO contents in charge on

Download Citation Influence of SiO2 and FeO contents in charge on sinter strength The influence of composition of charge on sinter strength was studied by means of tumbling test, optical ...

More

Influence of SiO_2 and FeO Contents in Charge on

Influence of SiO_2 and FeO Contents in Charge on Sinter Strength ZHANG Jin-zhu1,DENG Hai-liang1,AO Wan-zhong2,ZHAO Yue-ping1(1.College of Materials Science and Metallurgy Engineering,Guizhou University,Guiyang 550003,Guizhou,China;2.Department of technology,Shuicheng Iron and Steel Group Co.Limited,Shuicheng 553028,Guizhou,China)

More

Microstructure and Minerals Evolution of Iron Ore Sinter ...

of Al 2O3 and SiO 2 affect sintering performance. Still, their influence has not been clearly revealed, and some points were even found to be contradictory. It has been widely regarded that a content of Al 2O3 exceeding 2.5% will deteriorate the sinter quality, while the influence of an Al2O3 content ≤2.5% on

More

Microstructure and Minerals Evolution of Iron Ore

SiO 2 and Al 2 O 3 are two important minerals that can affect the mechanical and metallurgical properties of sinter. This investigation systematically studied the influences of these minerals and revealed their functional mechanisms on sinter quality. Results showed that with an increasing Al 2 O 3 content in sinter, the sintering indexes presented an improvement before the content exceeded 1 ...

More

Effect of FeO Content in Ore on the Properties of

The results show that the content of FeO in sinter of hematite is much lower than magnetite. With the increasing of the FeO content of original ore, the FeO content in sinter increases but the content of calcium ferrite gets low, and the quantity of bonding phase hasn't apparently change.

More

Influence of CaO Addition, FeO/SiO2 , and

However, the melting properties of nickel slag, a typical FeO-SiO 2-MgO-CaO system, were merely reported. Therefore, both FactSage software and hot stage microscope were used to investigate the influence of CaO addition, FeO/SiO 2 (F/S), and MgO/SiO 2 (M/S) on the melting characteristic temperatures of FeO-SiO 2-MgO-CaO system in the current work.

More

Influence of Basicity and FeO Content on Viscosity

The slag viscosity decreases as the CaO/SiO2 mass ratio is increased from 0.8 to 1.2 and also as the FeO content is increased from 8wt% to 20wt%.

More

Influence of FeO/SiO2 and CaO/SiO2 Ratios in Iron ...

The corrosion behavior of MgO in iron‐saturated ZnO‐rich fayalite (ZFS) slags having various FeO/SiO2 ratio and CaO/SiO2 ratio was investigated using MgO crucible tests for 12 h at 1200°C. The FeO/Si...

More

The effects of CaO and FeO on the structure and

In this study, five groups of SiO 2-Al 2 O 3-CaO and SiO 2-Al 2 O 3-FeO slag systems with the SiO 2 /Al 2 O 3 ratio being fixed at 3.5 [29,30] were selected for molecular dynamics simulation.The proportion of each component is shown in Table 2.Each simulated component consists of approximately 10,000 atoms, all atoms are randomly placed in a cube box, the volume of the box is determined by the ...

More

Influence of Al2O3 Content on Liquid Phase Proportion and ...

Influence of Al 2O 3 Content on Liquid Phase Proportion and Fluidity of Primary Slag and ... liquid phase proportion and fluidity in the CaO–MgO–SiO2–Al2O3–FeO quinary ... TFe CaO MgO SiO 2 Al 2O 3 FeO P S LOI Sinter 70 57.43 9.41 1.66 4.98 1.76 8.24 0.06 0.01 — 1.89

More

Minerals Free Full-Text Microstructure and

SiO 2 and Al 2 O 3 are two important minerals that can affect the mechanical and metallurgical properties of sinter. This investigation systematically studied the influences of these minerals and revealed their functional mechanisms on sinter quality. Results showed that with an increasing Al 2 O 3 content in sinter, the sintering indexes presented an improvement before the content

More

Chemical, Mineralogical and Metallurgical Characterization of Goethite Rich Iron Ore Sinter

overcome by increasing the basicity (CaO/SiO 2). It leads to increase in slag volume, consumption of more coke and decrease in productivity. FeO Content: The main source of FeO in sinter is iron ore fines, mill scales. The FeO content of the raw materials have a significant impact on the burn through point and tumbler index.

More

The effect of foamy slag in electric arc furnaces on electric energy

ternary system of FeO, CaO+MgO+MnO, Al2O3+SiO2+P2O5 groups and the content of second phase particles were estimated using the ternary diagrams of FeO-CaO-SiO 2 . at 1550 °C Three correlations, suggested by Roscoe, Brinkman, Happel in equations 8 to 10, were substituted in

More

THE INFLUENCE OF THE SILICATE SLAG COMPOSITION ON COPPER LOSSES DURING SMELTING OF THE SULFIDE CONCENTRATES

Besides, increased SiO 2 content is extensively banding FeO, thus forming fayalite and interrupting silicon net structure, which leads to decrease in the viscosity of the slag. Such conditions improve coalescence of the dispersed copper matte drops in the slag which decrease mechanical copper losses. 3.2. The influence of the FeO content in the ...

More

Application of on-line Observation Device of FeO

It's important to keep FeO content stable in order to improve the quality of sinter.No.2 sinter machine in Shougang Jingtang company employed observation system for FeO content-Permagnag,made by IRM group in Belgium,which could control FeO content in sinter more accurately through tracking the change of FeO content and controlling the quantity of carbon

More

Influence of High Temperature Interaction between Sinter and

significant influence on the blast furnace operation. While, the high temperature properties of blast furnace slags play an important role on the softening and melting behavior of raw materials in blast furnace.1,2) Many researchers have found that the chemical composition, such as CaO/SiO2, Al2O3 and MgO content, have great influence on the ...

More

N. A. El-Hussiny, F. M. Mohamed, and M. E. H. Shalabi*) Central

The sinter charge basicity (CaO of the iron ore, mill scale, coke breeze and limestone / SiO2 of the iron ore, mill scale, coke breeze and limestone) = 1, was kept constant throughout all experiments of the influence of the replaced mill scale instead of iron ore . The green charge was loaded over the sinter bed layer (0.5 Kg sinter + 10 mm). The

More

Use of DRI in EAF’s

Depending on the charge weight of DRI or HBI, SiO 2 gangue content, aim tap phosphorous levels and slag FeO percentage, the total lime addition to the EAF may range from 25 to 70 kg/tap ton. Slag of sufficient volume to cover the arc during foaming needs to be available in the EAF. Foaming slag has a specific gravity 1/3 that of normal slag.

More

Effect of Al2O3, MgO, and CaO/SiO2 on Viscosity

The effects of Al 2 O 3, MgO, and binary basicity on the viscosity of high alumina blast furnace slag are studied systematically at the temperatures of 1773 K and below using the orthogonal experimental design method.The results show that, at fixed binary basicity (CaO/SiO 2) between 1.1 and 1.2, higher Al 2 O 3 content increase the slag viscosity due to the polymerization of

More

OPTIMIZATION OF TIN RECOVERY FROM CONCENTRATES

2 content, possibly due to characteristics of Brazilian ores and reconcentration in the mineral processing circuit. In order to simplify the problem, thus allowing an initial study on the ideal composition of final slags, only the influence of CaO, FeO, SiO 2 and ZrO 2 on the melting temperature of final slags were analyzed. The CaO-FeO x-SiO 2

More

Influence of High Temperature Interaction

As for sinter, the initial phase of the primary-slags should also contain fayalite (2FeOSiO 2) and the content of fayalite was limited as the SiO 2 content of sinter was quite lower, but other phases such as wollastonite (β-(Ca,Fe)OSiO 2) and olivine (2(Fe,Ca)OSiO 2) would be formed based on the phase diagram of CaO–FeO–SiO 2. 8,22) However, with the decrease of FeO content

More

Chemical, Mineralogical and Metallurgical Characterization ...

overcome by increasing the basicity (CaO/SiO 2). It leads to increase in slag volume, consumption of more coke and decrease in productivity. FeO Content: The main source of FeO in sinter is iron ore fines, mill scales. The FeO content of the raw materials have a significant impact on the burn through point and tumbler index.

More

OPTIMALIZATION SLAG COMPOSITION IN LADLE FURNACE ...

4 TiO 2 4.71 5 SiO 2 3.4 6 Cr 2O3 2.79 7 FeO 2.47 8 Temperature 2.15 9 MgO 0.09 Fig.4 Histogram of incoming sulphur content in the ladle furnace The first step to solve this problem is selection of steel scrap according to lowest spread of sulphur content. In the mass production of steel it is probably most difficult practically

More

OPTIMIZATION OF TIN RECOVERY FROM CONCENTRATES

2 content, possibly due to characteristics of Brazilian ores and reconcentration in the mineral processing circuit. In order to simplify the problem, thus allowing an initial study on the ideal composition of final slags, only the influence of CaO, FeO, SiO 2 and ZrO 2 on the melting temperature of final slags were analyzed. The CaO-FeO x-SiO 2

More

Improving reducibility of iron ore pellets by optimization ...

enhances to form hercynite (FeO Al 2 O 3) which is crystallized out between the grains of wustite. Therefore, dissolved FeO with SiO 2 and Al 2 O 3 are hardly reduced. Baldwin et al.[ 4] reported that fayalite formation in iron oxide pellet is prevented by lime. At the basicity (CaO/SiO 2 ratio) below 0.4, lime, silica and ferrous oxide become ...

More

Slag Evaluation to Reduce Energy Consumption and EAF ...

Figure 2: Shapes of sine waves, without foamy slag (a) and with foamy slag (b)2. Figure 3: Relationship between the FeO content in slag and energy consumption7. Figure 4: Relationship between basicity and energy consumption 7. charge has a controlled chemical composition because it is used to produce a critical steel quality. Thus, the dispersion

More

The effects of MgO and Al2O3 behaviours on

When sinter melts, the viscosity of the slag generated from sinter containing high MgO and Al 2 O 3 content is low, which could result in low pressure drop. As MgO and Al 2 O 3 content increase, the main minerals of residual slag change from 2CaO•SiO 2 to merwinte and melilite. The changes of the minerals in slag phase can well explain the ...

More

EFFECT OF CAO/SIO RATIO ON MELTING PROPERTY AND

2 content (in form of 40 %V-Ti ore addition and 13 %V-Ti ore addition), which will influence the viscosity of the liquid phases. The difference between A and B in TiO 2 content may be the reason causing the difference in melting tempera-ture at the same CaO/SiO 2 ratio. Due to the TiO 2 region is too small (TiO 2 1,0 ~ 2,3 %) and the other ...

More

Reduction of Iron Ore Pellets, Sinter, and Lump

This research work focuses on the reduction behavior of iron ore pellets, sinter, and lump ore in simulated BF shaft conditions where H 2 and H 2 O are present in typical CO CO 2 N 2 atmospheres. 2 Experimental Section. Sinter, lump ore, and iron ore pellets were used in experiments. The composition for all three materials is shown in Table 1.

More

Sinter Quality and Process of Sintering Iron Ores

Fig 1 Schematics of sinter mix and product sinter Sintering process is a generic term that is used to describe the process of agglomeration of a green mix of iron ores, fluxes and coke and plant solid wastes having a particle size of -10 mm so as to produce sinter which can withstand operating pressure and temperature conditions existing in a BF.

More

Thermodynamic Modelling of Iron Ore

Figure 10a illustrates that the contents of SiO 2 and CaO in the melt formed at 1573 K and oxygen partial pressure of 10 −8 atm decreases, and FeO x increases with increasing basicity. Figure 10b shows that the increase of the replacement of SiO 2 and CaO with FeO x causes the viscosity of the melt decreases considerably.

More

Study of sinter reactions when fine iron ore is replaced ...

Table of contents Abstract ... III.3.2.1.4. The CaO-Fe 2O3-SiO 2-FeO system ... due to its abundance in iron ore sinter and its significant influence on sinter quality, sintering reactions have specifically been studied with regard to the control of the

More

IMPORTANCE AND EFFECT OF FOAMING SLAG ON ENERGY ... -

The slag used was a ternary system of FeO, CaO+MgO+MnO, Al. 2. O. 3 +SiO. 2 +P. 2. O. 5. group at 1550°C. Sima and Hossein have used basicity, FeO contents, and height of slag. In 2011, Veena [11] and others started how to enhance the foaming process. They used different

More

Use of DRI in EAF’s

Depending on the charge weight of DRI or HBI, SiO 2 gangue content, aim tap phosphorous levels and slag FeO percentage, the total lime addition to the EAF may range from 25 to 70 kg/tap ton. Slag of sufficient volume to cover the arc during foaming needs to be available in the EAF. Foaming slag has a specific gravity 1/3 that of normal slag.

More

Slag Evaluation to Reduce Energy Consumption and EAF ...

Figure 2: Shapes of sine waves, without foamy slag (a) and with foamy slag (b)2. Figure 3: Relationship between the FeO content in slag and energy consumption7. Figure 4: Relationship between basicity and energy consumption 7. charge has a controlled chemical composition because it is used to produce a critical steel quality. Thus, the dispersion

More

Thermodynamics of the MnO-containing slags and equilibrium ...

SiO 2-CaO-Al 2O 3-MgO liquid slags. Application of the modified quasi-chemical model14 with a given set of published parameters leads to inaccurate description of the thermodynamic properties in the low MnO domain of liquid MnO-SiO 2-CaO-Al 2O 3 slags. By extensive examination of measured thermochemical properties and phase equilibrium data ...

More

Sinter Quality and Process of Sintering Iron Ores –

Fig 1 Schematics of sinter mix and product sinter Sintering process is a generic term that is used to describe the process of agglomeration of a green mix of iron ores, fluxes and coke and plant solid wastes having a particle size of -10 mm so as to produce sinter which can withstand operating pressure and temperature conditions existing in a BF.

More

Evidence for the charge disproportionation of iron

Abstract. Bridgmanite, MgSiO 3 with perovskite structure, is considered the most abundant mineral on Earth. On the lower mantle, it contains Fe and Al that strongly influence its behavior. Experimentalists have debated whether iron may exist in a mixed valence state, coexistence of Fe 2+ and Fe 3+ in bridgmanite, through charge disproportionation. Here, we report the discovery of Fe-rich ...

More

Steelmaking Slag Beneficiation by Magnetic Separator and ...

of introducing 1 kg of metallic iron into the charge is 0.2 - 0.3 kg. When BOF slag is introduced into the sintering charge, the contents of magnesium and manganese oxides rises. This helps to improve slag conditions in the blast smelting and reduce the sulfur content in the pig iron.

More

Modeling Sintering Process of Iron Ore - IntechOpen

2 Modeling Sintering Process of Iron Ore Jose Adilson de Castro Graduate Program on Metallurgical Engineering -Federal Fluminense University Brazil 1. Introduction In this chapter, a methodology for simulating th e sintering process of iron ore is presented. In order to study the process parameters and inner phenomena, a mathematical model

More