low alumina iron ore sinter properties


Effect of Iron Ore Concentrate on Sintering ... - J-STAGE Home

Nov 21, 2014· The size of iron ore affects the sintering properties. An increase in the size of iron ore promotes the productivity of sinter, but can reduce the tumbler strength slightly and save a little coke. The mineralogy of sinter can more easily be predicted from its chemical composition than its physical and chemical properties.

Modeling Sintering Process of Iron Ore

Recent results on pisolitic ore showed that it more readily forms a melt than dense hematite ores.30) Therefore, addition of low alumina pisolitic ore, such as Yandi, to high alumina sinter blends may help to produce more melt and dilute the effect of alumina on sinter quality.

Influence of sinter basicity (CaO/SiO 2 ) on low and high ...

pacts of alumina on the sintering performance of hematite iron ore fines are discussed. 2. Effect of Alumina on Sinter Mineralogy Low temperature fluxed sinter mainly contains un-re-acted hematite nuclei (around 30vol%) in a matrix (about 70vol%) consisting of silicoferrite of calcium and alu-minium (SFCA), secondary hematite (H2), secondary mag-

UNIVERSITY OF PRETORIA DEPARTMENT OF MATERIALS …

rameters. Among raw materials due to its major quantity, the iron ore plays the most significant role in sintering and hence the iron ore should have better metallurgical properties like high reducibility >70%, low degradation index, high softening and melt-down characteristics. Sintering process is extremely complex due to very short time.

Influence of sinter basicity (CaO/SiO2) on low and high ...

Modeling Sintering Process of Iron Ore 25 Fig. 2. Thermal cycle of the materials in the sinter strand. Several attempts have been done to predict the final properties of the sinter product (Water et al. 1989, Kasai et al. 1989, 1991). The most important parameters are reducibility,

Iron ore sintering - ScienceDirect

Jan 01, 2015· Iron ore sinter typically constitutes more than 60% of the blast furnace ferrous burden in modern blast furnaces in East Asia. Granulation and thermal densification are two important steps in iron ore sintering and determine the quality of the resultant sinter and the performance of the sintering …

effect of alumina on sintering performance of iron ores_ ...

Iron ore sintering is an important stage in the production of steel from iron ore. Sinter can constitute more than 60% of ferrous burden in modern blast furnaces in Japan and most blast furnaces in Europe. Iron ore sintering is a high temperature process which converts iron ore fines (<6–8 mm in size, too small for direct feed into the blast ...

Does low grade ore mean low performance? - Process ...

composition and microstructure of iron ore sinter for low-temperature drip of molten iron with high permeability established that the basicity had a dominant influence on the dripping temperature while low alumina content and high MgO leads to low dripping temperature (6).

Does low grade ore mean low performance? - Process ...

Studies have been carried out on low and high alumina iron ore fines to know the influence of sinter basicity and fuel (coke breeze) addition on sinter mineralogy, properties and productivity.

Effect of alumina and its types on sintering performance ...

In addition, the addition of Al2O3 also adversely affects the metallurgical performance of sinter products. However, the effect of various types of alumina present in iron ore fines on sintering performances and metallurgical properties of sinter is different.

Sinter Quality and Process of Sintering Iron Ores – IspatGuru

iron ore concentrate contains a lower alumina. Recently it is more popular to be applied in commercial sinter plants to decrease the alumina content in sinter or combined with a high alumina low grade ore to reduce the production cost of sintering. However the productivity of sinter decreased with a decrease in the size of iron ore.

Does low grade ore mean low ... - Process productivity

Effects of alumina on sintering performance of hematite iron ores. ISIJ International, 47(3), . Webster, N A S, O'Dea, D P, Ellis, B G and Pownceby, M I, 2017. Effects of gibbsite, kaolinite and Al-rich goethite as alumina sources on silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phase formation.

Effect of alumina and its types on sintering performance ...

The quality of iron ore presently being used calls for extensive investigations to produce low basicity sinter with high alumina iron ore. Studies have been carried out on low and high alumina iron ore fines to know the influence of sinter basicity and fuel (coke breeze) addition on sinter mineralogy, properties …

XVIII Analyst & Investor Tour

Studies have been carried out on low and high alumina iron ore fines to know the influence of sinter basicity and fuel (coke breeze) addition on sinter mineralogy, properties and productivity.

Review Effects of Alumina on Sintering ... - jstage.jst.go.jp

Recent results on pisolitic ore showed that it more readily forms a melt than dense hematite ores.30) Therefore, addition of low alumina pisolitic ore, such as Yandi, to high alumina sinter blends may help to produce more melt and dilute the effect of alumina on sinter quality.

effect of alumina on sintering performance of iron ores_ ...

Effects of alumina on sintering performance of hematite iron ores. ISIJ International, 47(3), . Webster, N A S, O'Dea, D P, Ellis, B G and Pownceby, M I, 2017. Effects of gibbsite, kaolinite and Al-rich goethite as alumina sources on silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phase formation.

Influence of sinter basicity (CaO/SiO 2 ) on low and high ...

The low Al 2 O 3 (<2.0 wt%), medium MgO (2.0–2.5 wt%) and high basicity (>3.0) sinter showed higher low temperature degradation index (LTD) due to the presence of silico ferrites of calcium and aluminium (SFCA), and magnetite phase, and lower pore phase as compared to low basicity iron ore sinter.

Influence of sinter basicity (CaO/SiO2) on low and high ...

All LKAB fines for sintering are to be regarded as high iron and low silica content fines. Addition of these ores will lead to an increased possibility of using fines of lower quality, while maintaining iron content in sinter. In Table 3, the chemical composition of sinter blends can be seen.

Mineralogy of Iron Ores of Different Alumina Levels from ...

domestic iron ore concentrates, which helps to produce sinter with lower impurity levels. However, an excessively low SiO2 content would lead to insufficient generation of SFCA (Quaternary compound of calcium ferrite containing silicate and alumina) under the same basicity (mass ratio of CaO to SiO2 in sinter).

Sinter Quality and Process of Sintering Iron Ores – IspatGuru

Nov 21, 2014· The size of iron ore affects the sintering properties. An increase in the size of iron ore promotes the productivity of sinter, but can reduce the tumbler strength slightly and save a little coke. The mineralogy of sinter can more easily be predicted from its chemical composition than its physical and chemical properties.

Investigation into how the magnesia, silica, and alumina ...

domestic iron ore concentrates, which helps to produce sinter with lower impurity levels. However, an excessively low SiO2 content would lead to insufficient generation of SFCA (Quaternary compound of calcium ferrite containing silicate and alumina) under the same basicity (mass ratio of CaO to SiO2 in sinter).

Influence of Coating Granulation Process on Iron Ore ...

Effects of alumina on sintering performance of hematite iron ores. ISIJ International, 47(3), . Webster, N A S, O'Dea, D P, Ellis, B G and Pownceby, M I, 2017. Effects of gibbsite, kaolinite and Al-rich goethite as alumina sources on silico-ferrite of calcium and aluminium (SFCA) and SFCA-I iron ore sinter bonding phase formation.

UTILIZATION OF IRON VALUES OF RED MUD • AN OVERVIEW

The quality of iron ore presently being used calls for extensive investigations to produce low basicity sinter with high alumina iron ore. Studies have been carried out on low and high alumina iron ore fines to know the influence of sinter basicity and fuel (coke breeze) addition on sinter mineralogy, properties …

Effect of Alumina and Magnesia on Microstructure and ...

machined iron properties and steel are enormous. In order to use Agbaja iron ore, it is 5 imperative to blend the ore with Itakpe iron ore with a reserve of about million metric tonnes having low phosphorus (0.03%) and high silica to take care of the high phosphorus in Agbaja iron ore and also to provide large source of iron ore for sinter

Minerals | Special Issue : Mineralogy of Iron Ore Sinters

In addition, the addition of Al2O3 also adversely affects the metallurgical performance of sinter products. However, the effect of various types of alumina present in iron ore fines on sintering performances and metallurgical properties of sinter is different.

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