effects of basicity and feo content on the softening and

(PDF) Effect of Basicity on Sintering Behavior and ...

Apr 27, 2020· Considering the adverse effect of basicity on softening-melting properties, the best recommended value is 2.3. SEM image and EDS mapping of HCVTM sinters (basicity = 2.3). ... the FeO content…

Impact of Sinter Basicity and Alumina on Softening Melting ...

Nov 26, 2019· Softening–melting (SM) experiments have been carried out by using sinter basicity (CaO/SiO2) 1.74 to 2.09 and alumina content 2.90 to 3.39%. The objective of the work is to find the relation between sinter basicity and alumina on SM temperature range, so that we can improve the furnace performance. The increase in basicity of sinter from 1.74 to 2.09 at alumina 2.90 decreases softening …

Effects of B2O3 on Melting Characteristics and Temperature ...

Mar 08, 2020· Thus, high-basicity CaO–SiO 2 –FeO x –MgO slag with B 2 O 3 content from 0% to 15% was designed, and its melting characteristics and viscosity were investigated. The influence of B 2 O 3 content on the phase diagram of the slag system was calculated using FactSage 7.3, and the break temperature was determined from the curves of ...

Influence of basicity and FeO content on viscosity of ...

The viscosities of CaO-SiO2-Al2O3-MgO-FeO slags were measured under conditions of C/S=1.15-1.6, 10-13 mass% Al2O3, 5-10 mass% MgO and 0-20 mass% FeO. Slag viscosity decreased with increasing FeO content at a fixed basicity (CaO/SiO2) of slag. Slag viscosity at low FeO ( 1.3 would be increased with increasing the chemical potential of primary solid phase e.g. dicalcium silicate.

Thermodynamic Modeling of Phase Equilibria in the FeO-MgO ...

Thermodynamic modeling of coordinates of phase diagrams' liquidus lines of the FeO–MgO, FeO–Al2O3, MgO–Al2O3 systems and coordinates of phase diagram's liquidus surface of the FeO–MgO–Al2O3 system has been carried out. In the course of work, a thermodynamic model which describes activity of oxide melt had been selected for each of the systems; energy parameters of the model have ...

Inﬂuence of Basicity and FeO Content on Viscosity of Blast ...

crease from about 2.5 to 10dPa·s as FeO content decreases from 10 to 5mass%. The slag viscosity increases with in-creasing basicity from 1.4 to 1.6 at a ﬁxed MgO and FeO content. As shown in Fig. 5, the typical bosh slags contain-ing FeO content less than 7.5mass% exhibit relatively high viscosity, because the effect of basicity and MgO on the

Effect of Basicity, Al2O3 and MgO content on the softening ...

The effect of basicity, MgO and Al2 O3 content on characteristic temperature are also studied. FactSage 6.4 data base is used to calculate liquidus temperature of the above quaternary slags and compared with the experimental and regression results.

CiNii - Effects of Basicity and FeO Content on the ...

Effects of Basicity and FeO Content on the Softening and Melting Temperatures of the CaO-SiO_2-MaO-Al_2O_3 Slag System Chuang Hsin-Chien, Hwang Weng-Sing, Liu Shih-Hsien Materials transactions 50(6), 1448-1456,

(PDF) Effects of Basicity and FeO Content on the Softening ...

The effects of basicity (the ratio between CaO and SiO2) and FeO content on softening and melting temperatures of direct reduced iron (DRI) residual, otherwise known as slag, were investigated.

Effect of basicity on metallurgical properties of ...

Sep 10, 2019· Zhu et al. studied the effect of basicity and MgO content on the metallurgical properties of Brazil iron ore pellets. Previous studies illustrated that the basicity has more significant effects on the liquid phase and properties of magnesium fluxed pellets than SiO 2 and MgO contents [7–11, 13,14,15,16,17,18,19,20,21].

(PDF) Impact of Sinter Basicity and Alumina on Softening ...

3.1.2 Effect of Basicity on Softening–Me ... the associated increase in fuel rate during sintering raises the FeO content. The effects of increasing FeO and lowering MgO on the softening melting ...

CiNii - Effects of Basicity and FeO Content on the ...

Effects of Basicity and FeO Content on the Softening and Melting Temperatures of the CaO-SiO2-MgO-Al2O3 Slag System Chuang Hsin-Chien, Hwang Weng-Sing, Liu Shih-Hsien MATERIALS TRANSACTIONS 50(6), 1448-1456, 2009

Change and mechanism analysis of the softening-melting ...

May 21, 2020· Effects of basicity and FeO content on the softening and melting temperatures of the CaO-SiO 2-MgO-Al 2 O 3 slag system Mater Trans, 50 ( 2009 ), pp. 1448 - …

Effect of lime addition on the mineral structure and ...

Oct 01, 2020· Effect of basicity on the compressive strength of roasted pellets As is known to us all that solid phase consolidation and liquid phase bonding are the bonding mechanisms of magnetite pellets during the roasting process, which could improve the compressive strength of …

Effects of Basicity and FeO Content on the Softening and ...

Effects of Basicity and FeO Content on the Softening and Melting Temperatures of the CaO-SiO 2-MgO-Al 2 O 3 Slag System Hsin-Chien Chuang 1), Weng-Sing Hwang 1), Shih-Hsien Liu 2) 1) Department of Materials Science and Engineering, National Cheng Kung University 2) Iron Making Process Development Section, Steel & Aluminum Research ...

Softening Behaviors of Acid and Olivine Fluxed Iron Ore ...

experiments. Variables such as the RD, basicity, gangue content, slag viscosity etc. have an effect on the softening and melting properties. The occurrence of many simultane-ous phenomena during the softening and melting makes the clarification of these effects difficult.1,5–9) This research work focuses on the softening behavior of iron ore ...

Effects of Basicity and FeO Content on the Softening and ...

Jun 01, 2009· Effects of Basicity and FeO Content on the Softening and Melting Temperatures of the CaO-SiO_2-MaO-Al_2O_3 Slag System データ Japan Institute of Metals

Effect Of CaO, FeO, MgO, SiO2 and Al2O3 Content of Slag on ...

Mar 04, 2019· Effect of FeO FeO is necessary slag constituents for the dephosphorization of steel. It is very important to maintain FeO content in the slag as it increases the oxidizing power of slag. Dephosphorization is enhanced by a decrease in temperature and increase in FeO content and basicity of the slag. The P partition ratio initially increases with ...

Effect of Fluxing Agents on the Quality and Microstructure ...

Jun 01, 2017· content in the basicity range of 0 to 0.8 for Indian hematite ore. In the present study, limestone fluxed pellets were prepared at varying CaO and basicity (0 to 0.8) and pyroxenite fluxed pellets at varying MgO contents (0 to 3%) to study their effect on the metallurgical properties. All the

Corrosion mechanism and protection of BOF refractory for ...

May 01, 2020· Effects of basicity and FeO content on the softening and melting temperatures of the CaO-SiO 2-MgO-Al 2 O 3 slag system Mater Trans B, 50 ( 2009 ), pp. 1448 - 1456 View Record in Scopus Google Scholar

STUDY ON BASICITY IN DIRECT REDUCED IRON SMELTING | Saleh ...

Effects of basicity and feo content on the soften- ing and melting temperatures of the CaO-SiO2- MgO-Al2O3 slag system, Materials Transactions, The Japan Institute of Metals, Vol. 50, No. 6, p. 1448 – …

Influence of atmosphere and basicity on softening and ...

In this study, we analyze the softening and melting behaviors of the CaO-FeO-SiO 2-Al 2 O 3-MgO system for improving gas permeability in a blast furnace.The temperature of the oxide is increased to 1 723 or 1 773 K in a CO/CO 2 mixture; the softening and melting temperatures and the temperature of penetration into the coke bed are measured. Because the CO/CO 2 ratio in the atmosphere ...

Effect of Basicity on Metallurgical Properties of Fluxed ...

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 simulating BF conditions.

Effect of pellet basicity and MgO content on the quality ...

May 08, 2011· In the present study, effect of pellet basicity and MgO content on the melt formation and microstructure during the induration was examined. Fired pellets with varying basicity (0 to 0.8) and MgO (0 and 1.5%) content were tested for cold strength, reduction degradation index, reducibility, swelling and softening–melting characteristics.

Effect of binary basicity and ferric oxide content on the ...

Effect of basicity on f-CaO content in slag samples. Figure 6 illustrates the effect of the Fe 2 O 3 content on the f-CaO content. ... [FeO 6] possesses an octahedral structure larger than the tetrahedral structure of [FeO 4], while Fe–O bonds are relatively long and weak and are thus easy to …

STUDY ON BASICITY IN DIRECT REDUCED IRON SMELTING

the raw materials, gangue content, and flux pro-portion and their subsequent treatment to produce pellets. Pellet with basicity 0.33 showed good physical as well metallurgical properties due to bonding phases present in the pellets. Whereas, Dwarapudi et al. 2011, studied effect of pellet basicity and MgO content on the melt formation

Effect of Fluxing Agents on the Quality and Microstructure ...

Jun 01, 2017· 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 study their effect on the metallurgical properties.

Materials | Free Full-Text | Effects of B2O3 on Melting ...

Thus, high-basicity CaO–SiO 2 –FeO x –MgO slag with B 2 O 3 content from 0% to 15% was designed, and its melting characteristics and viscosity were investigated. The influence of B 2 O 3 content on the phase diagram of the slag system was calculated using FactSage 7.3, and the break temperature was determined from the curves of ...

Effect of FeO Content in Ore on the Properties of Sinter ...

The content and stability of FeO in sinter are the important comprehensive indicators to assessing the sintering production. They not only reflect the quality and energy consumption of agglomerates, but also influence the smelting results of blast furnace. The effects of the FeO content of original ores on the FeO content in sinter and the creating ability of calcium ferrite are discussed in ...

Effect of Basicity on Metallurgical Properties of Fluxed ...

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 simulating BF conditions. From the results, with increasing basicity …

Effect of basicity on the reduction swelling behavior and ...

Jul 23, 2021· 1. Introduction. Fluxed pellets have long been a research hotspot in the fields of ironmaking, which can be attributed to their better reducibility, swelling, softening–melting properties than acid pellets and less environmental pollution than sinters [1,2].Reduction swelling plays a major role in increasing the usage of pellets among the metallurgical characteristics mentioned above.

Theory and Practice of Sintering of Iron ore – IspatGuru

Nov 25, 2018· Another study done for finding the effect of the FeO content in sinter (sinter type A 10 % and sinter type B 12 %) on softening and melting, and its impact on the BF working. The sinter with more FeO caused early softening of the burden, a phenomenon which is undesirable in the BF.

Co-injection of Basic Fluxes or BF Flue Dust

residual content of FeO in the pellet core, a higher degree of disintegration and swelling during reduction, and an increased width of the softening and melting-temperature interval. In order to achieve even better blast furnace performance, a new type of self-fluxed pellet with low gangue content …

UDC 622 . 785 . 5 : 669 . 162 . 26 . 012 . 4 Quality ...

content increased when the basicity was high. On the other hand, the Td tended to fall as the MgO content increased, and this tendency was more conspicuous when the basicity was high. The liquidus line temperature of CaO-SiO 2-Al 2 O 3-FeO slag be-comes higher in a basicity range of 1.0 or more, and the ratio of the 1. Introduction

THE INFLUENCE OF MODIFICATION LIMONITE ORE BASICITY …

Effect of basicity of the softening temperature sinter Watching the tested sample sinters on Figure 2. can be concluded that the interval softening point changes depending on the changes basicity. For sinter temperature with smaller basicity beginning and end of of melting are quite high, and the of softening interval is wide which is not good.

effects of basicity and feo content on the softening and

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