Effect of Alumina on Liquid Phase Formation in Sintering …
Three homogeneous phases of CaFe 2 O 4 (CF), Ca 2 Fe 15.57 O 25.56 (CF 3.9), and Ca 3.18 Fe 15.48 Al 1.34 O 28 (CFA) are prepared to determine the melting …
اقرأ أكثر
A Short Review of the Effect of Iron Ore Selection …
The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering. The silico-ferrite of calcium and aluminum (SFCA) is the main bonding phase found in modern iron ore sinters.
اقرأ أكثر
The influence of ore composition on sinter phase mineralogy …
The levels of Fe, SiO 2, Al 2 O 3, MgO and other elements, together with the nature of the minerals in the fine ore and associated sintering conditions play a major role in …
اقرأ أكثر
Characteristics of combustion zone and evolution of …
phases, and the evolution of the sinter phases are important for the controllable preparation of sinter. Researchers who have previously investigated CZ of sin-tering have focused mainly on numerical modeling and sin-ter pot experiments. The results of numerical simulations of the sintering process have already aroused extensive interest.
اقرأ أكثر
Quantifying the composite microhardness and fracture toughness of iron
Microindentation testing was undertaken on sinter phases in iron ore sinter to determine the range and mean of phase/morphology microhardness.
اقرأ أكثر
Evaluation of the Liquid Phase Fluidity During Iron Ore Sintering
The liquid amount, computed by FactSage, and A after, are shown in Fig. 5.The liquid amount ranges from 39.4 to 98.2%, and A after tends to increase with the liquid amount. Ore E shows a different trend with other iron ores in A after and the liquid amount. Compared to ore F and ore G, the lower A after of ore E is caused by its thicker liquid cake after sintering .
اقرأ أكثر
Fundamentals of Silico-Ferrite of Calcium and Aluminium …
SFCA-I is one of the key bonding phases in iron ore sinter, influencing physical properties such as strength, reducibility, and strength degradation during reduction. The results reported herein ...
اقرأ أكثر
Sinter Quality and Process of Sintering Iron Ores – IspatGuru
It is composed of several mineral phases out of which main phases are hematite, magnetite, iron ore, SFCA, dicalcium silicate and a glassy phase. The mineralogical distribution of different phases determines the microstructure of the sinter which imparts the quality of the sinter such as mechanical strength and its behaviour during reduction in ...
اقرأ أكثر
Characterisation of iron ore sinter products with varying …
Iron ore sinter is one of most extensively utilised ferrous burdens for blast furnace (BF) worldwide. The sinter quality greatly depends on the microstructure and chemical compositions of calcium ferrites which is significantly affected by sinter basicity (mass ratio of CaO to SiO 2).The characterisation of iron ore sinter products with varying binary basicity …
اقرأ أكثر
Prediction of liquid phase generation during iron ore sintering …
The generation of liquid phase in the iron ore sintering is of vital importance to the quality of sinter, including product ratio, tumbler index, etc. Some experimental methods were developed to ...
اقرأ أكثر
Effects of Basicity and Al2O3 Content on the Chemistry of Phases …
Generally, iron ore sinter is composed of hematite, magnetite, silicoferrite of calcium and aluminum (SFCA), dicalcium silicate (C2S), etc. Since Hancart et al.[25] reported that SFCA was the major bonding phase in the iron ore sinter, many researchers[26–28] have explored the composition range of SFCA.
اقرأ أكثر
Effect of BaSO4 on phase composition and sintering process of iron ore
Iron ore containing BaSO4 may have a series of effects on the quality of the sinter and performance of the blast furnace. Thus, the effect mechanism of BaSO4 (0–6.0 mass%) on the compressive strength, mineral composition, and microstructure of the sinter was investigated. The experimental results show that the compressive strength of the sintered samples initially …
اقرأ أكثر
Adaptability analysis of H2-rich gas injection and sintered …
As a source substitution technology that reduces pollutants emission and optimizes sinter properties, H 2-rich gas injection-assisted iron ore sintering holds significant practical …
اقرأ أكثر
Effect of Temperature, Time, and Cooling Rate on the …
properties of sinter, many authors have studied the mineralogy and morphology of iron ore sinter, with a focus on the bonding phase that is formed as a result of the high-temperature reactions. In order to generate a suitable sinter for ironmaking, the bonding phase must be physically strong, permeable to reducing gases in the blast furnace and ...
اقرأ أكثر
Effect of Alumina on Liquid Phase Formation in Sintering Process …
SFCA is the most important bonding phase in iron ore sinter, and its composition, structural type and texture greatly affect its physical properties. Despite its prevalence and importance, the ...
اقرأ أكثر
Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) Iron Ore
The formation of silico-ferrite of calcium and aluminum (SFCA) and SFCA-I iron ore sinter phases during heating and cooling of synthetic iron ore sinter mixtures in the range 298 K to 1623 K (25 ...
اقرأ أكثر
Fundamentals of Silico-Ferrite of Calcium and Aluminium …
The phase evolution during heating of two Al2O3-free mixtures designed to form the SFC iron ore sinter bonding phase was investigated using in-situ X-ray diffraction over the temperature range 293 ...
اقرأ أكثر
Ore Assimilation and Secondary Phases by …
The main phases are the iron oxides magnetite and hematite in an unreacted primary form or as secondary phases formed by reactions or precipitation from the melt. As typical secondary compounds in lime-fluxed …
اقرأ أكثر
EFFECT OF MgO AND BASICITY ON MICROSTRUCTURE …
Sintering is one of the most economic and widely used agglomeration process for preparing iron ore fines for blast furnace use. Many reactions may take place during the sintering process. Macroscopically iron sinter has a non-uniform structure with large irregular pores. Microscopically it consists of bonding phases, relict ore particles,
اقرأ أكثر
In situ X-ray diffraction analysis of iron ore sinter phases
In this process, a mixture of iron ore fines, flux, and coal particles is heated to about 1300 °C–1480 °C in a sinter bed. The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering. The silico-ferrite of calcium and aluminum (SFCA) is the main bonding phase found in modern iron ore sinters.
اقرأ أكثر
A Short Review of the Effect of Iron Ore Selection on Mineral Phases …
The sintering process is a thermal agglomeration process, and it is accompanied by chemical reactions. In this process, a mixture of iron ore fines, flux, and coal particles is heated to about 1300 °C–1480 °C in a sinter bed. The strength and reducibility properties of iron ore sinter are obtained by liquid phase sintering. The silico-ferrite of calcium and aluminum …
اقرأ أكثر
Effect of Variation of Alumina on the Microhardness of Iron Ore Sinter
Iron ore sinter is a major feedstock material of blast furnaces, utilised extensively worldwide in the production of steel from iron ore. In the iron ore sintering process, iron ore fines (the <6. ...
اقرأ أكثر
Effect of Hydrogen Concentration in Reducing Gas on …
higher reducibility of iron ore burden at lower temperature is required under higher hydrogen condition. Iron ore sinter, pellet, and lump ore are typical iron burdens of BF, and especially sinter is major one in East Asian countries. It is well known that main mineral phases of sinter are hematite, magnetite, calcium ferrite, and slag.
اقرأ أكثر
Fundamentals of Silico-Ferrite of Calcium and Aluminum …
The effect of MgO on the stability, concentrations and formation mechanisms of silico-ferrite of calcium and aluminum (SFCA and SFCA-I) iron ore sinter bonding phases during heating in synthetic mixtures was investigated using in situ x-ray diffraction. The novelty of this study is in the intricate detail in which the formation mechanisms of the SFCA-I and SFCA …
اقرأ أكثر
Changes of Mineral Phases during the Sintering of Iron Ore …
In order to elucidate the fundamental aspects of the sintering processes of self-fluxing sinters, the mineral formation processes of mixtures of iron ore and lime stone with or without coke were studied. After heating between 1200° and 1350°C the sinters were examined by microscopy, X-ray diffraction and EPMA.The results indicated that the mineral formation processes of the …
اقرأ أكثر
Influencing mechanism of Al2O3 on sintered liquid phase of iron ore
Influencing mechanism of Al 2 O 3 on sintered liquid phase of iron ore fines based on thermal and kinetic analysis Yi-fan Chai School of Materials and Metallurgy, Inner Mongolia University of Science and Technology, Baotou, People's Republic of China;School of Metallurgical and Ecological Engineering, University of Science and Technology ...
اقرأ أكثر
Phase relations in the Fe-rich part of the system Fe 2 O 3
The reaction sequences involved in the formation of iron ore sinter phases were determined using in situ synchrotron-based X-ray diffraction. Experiments were carried out using a synthetic sinter ...
اقرأ أكثر
Influencing mechanism of Al2O3 on sintered liquid phase of iron ore
Influencing mechanism of Al 2 O 3 on sintered liquid phase of iron ore fines based on thermal and kinetic analysis. Yi-fan Chai [email protected], ... Umadevi T, Deodar AV, Mahapatra PCet al. Influence of alumina on iron ore sinter properties and productivity in the conventional and selective granulation sintering process.
اقرأ أكثر
Effects of Ilmenite Ore on Phase Development of Hematite Ore Sinter
The effects of adding 5 to 25 wt pct of ilmenite ore to hematite ore sinter were investigated employing a horizontal tube furnace to clarify the phase development. The temperature was raised nonisothermally at 10 °C/min to 1150 °C in an Ar atmosphere. When the target temperature was reached, 1 L/min of air was injected to allow combustion of the carbon …
اقرأ أكثر