effect of high alumina in iron ore

Effect of alumina occurrence on sintering performance of iron

2021.5.1 This could be because high-alumina iron ores always contain several occurrence states of alumina and the effect of the major alumina occurrence on sintering performance is apt to be disturbed by that of other minor alumina forms.

Effects of Alumina on Sintering Performance of Hematite Iron

This paper attempts to clarify the role of different types of alumina present in iron ore fines and their effects on melt formation, sinter structure and sinter quality, as well as the

A Study on High-Grade Iron ore Beneficiation to Reduce Alumina

2020.5.21 Abstract. Iron ore pellets are largely characterized by inherent physical and chemical properties of the ore. Alumina and silica play important roles in determining the

Improving High-Alumina Iron Ores Processing via the

2020.9.11 Aiming at the effective utilization of the abundant high-alumina iron ores with low iron grade, the influence of alumina concentration and type on high-temperature

An investigation into aluminum occurrence impact on

2020.9.1 Then, the effects of iron ore type, aluminum occurrence (free alumina, gibbsite, diaspore, alumogoethite and kaolinite) and alumina content on formation

New Insights into Alumina Types in Iron Ore and Their

Optical microscopy and SEM EPMA investigations found that for the higher alumina cases the extra fuel and higher sintering temperatures led to more replacement of hematite by

Effect of alumina and silica content in the calcium ...

2021.1.1 Correlation between the mechanical properties of iron ore sinter and the chemical composition of the calcium aluminosilicoferrite Ca 2 (Ca,Fe,Mg) 6 (Fe,Si,Al) 6 O

Effect of alumina occurrence on sintering performance of iron

2021.3.21 As the increasing utilization of Australia iron ore with high Al2O3 in BF in iron and steel factory, 1) the content of Al2O3 in sinter increased and brought up several

Effect of Alumina on Liquid Phase Formation in Sintering Process

2019.5.20 As an important component of gangue in iron ore, alumina affects the amount of liquid phase by influencing the formation of calcium ferrites-bonding phase. In

(PDF) Improving High-Alumina Iron Ores

2020.9.11 The iron-bearing minerals of African iron ore G and Indian iron ore H ar e mainly hematite and trace goethite while the gangue minerals are di ﬀ erent, which includes quartz, gibbsite and ...

Characteristics and Sintering Mechanisms of Iron Ores with a High ...

2023.4.27 The ore is a typical limonite, which could help to reduce the prodn. cost of hot metal. The assimilation and fluidity properties of the new kind of high alumina iron ore were investigated, comparing with other kinds of limonite and magnetite iron ores. The effect of addn. of the iron ore on sintering process was also performed in a sintering ...

Effect of alumina and silica content in the calcium ...

2021.1.1 Correlation between the mechanical properties of iron ore sinter and the chemical composition of the calcium aluminosilicoferrite Ca 2 (Ca,Fe,Mg) 6 (Fe,Si,Al) 6 O 20 (SFCA) sinter bonding phase was examined. Sintering experiments with iron-rich, high-alumina and high-silica sintering blends were performed.

A Study on High-Grade Iron ore Beneficiation to Reduce Alumina

2020.5.21 In iron making, the adverse effect of alumina on reducibility, coke rate, productivity and blast furnace operation is well established and with the characteristic high alumina present in Indian iron ores as lateritic and/or clay gangue has always been a problem to bring down the alumina content preferably below 2.0% in the fines and slimes.

Effect of Limestone and Dolomite Flux on the Quality of

2020.10.23 The high-grade iron ore fines contain 64% Fe, 2.25% LOI, and Blaine number 2975 cm²/g, whereas iron ore slimes contain 52.45% Fe, 5.60% LOI, and Blaine number 7046 cm²/g. Pellets were produced ...

Alumina and its Role in Iron and Steelmaking – IspatGuru

2017.9.8 High alumina in the iron ore raises the levels of alumina in blast furnace slag. To operate a blast furnace with high alumina slag is quite difficult and need a different type of skill from the blast furnace operators since with the increase in the Al2O3 content of the slag, the blast furnace operation has problems such as excess accumulation ...

New Insights into Alumina Types in Iron Ore and Their

New Insights into Alumina Typesin Iron Ore and theirEffectonSintering 3 (BM-1) and blend of crushed PQ core fines (BM-3) were prepared to ensure size distributions that weresimilar to

Degradation mechanism of high alumina refractory bricks by

2022.5.1 The effect of disintegrated iron-ore pellet dust on deposit formation in a pilot-scale pulverized coal combustion furnace. Part I: characterization of process gas particles and deposits ... An accurate correlation between high-temperature performance and cement content of the high-alumina refractory castables. Ceramics International, Volume 48 ...

FactSage Studies to Identify the Optimum Slag Regime for

2021.1.6 Decreasing the slag rate can lead to a lower fuel rate and higher productivity in the blast furnace (BF). Indian iron ore is known to have adverse alumina–silica ratio. Therefore, to reduce the slag rate there is a need to either remove alumina from the iron ore or to add more silica to dilute the effect of alumina in slag. The latter would increase the

高钙赤铁矿烧结的矿物特性、冶金性能及相结构演变 - USTB

2017.5.29 文章亮点. (1) 全面地研究了高钙型赤铁矿的矿物学特性。. (2) 研究并分析了高钙赤铁矿与国产磁铁精粉混合烧结行为及其在烧结过程的作用机理。. (3) 基于烧结指标和烧结矿冶金性能的综合表现计算并分析了不同高钙赤铁矿配比的优劣。. 为了研究高钙赤铁矿的 ...

High-Temperature Physicochemical Properties of High Alumina

2022.8.19 The use of high alumina iron ore may cause the type of blast furnace slag to gradually transition from the present silicate system to the aluminosilicate system. ... The effect of alumina on the surface tension of molten glass. Journal of the American Ceramic Society, 20(1–12), 224–230. Google Scholar Fenzke, H.-W. (1969). Surface tension ...

Effect of alumina occurrence form on metallurgical

2023.9.13 2.1 Iron ore pellets. One type of Chinese magnetite concentrate M and one type of Brazilian hematite concentrate H were used as raw materials. The chemical compositions of the iron ore concentrates and alumina-containing additives are shown in Tables 1 and 2, respectively.The alumina content of hematite and magnetite pellets was

Physicochemical Properties of High Alumina Blast

2018.1.18 Leone ore [1]. If the high Al 2O 3 ore is extensively used in a blast furnace (BF), great deviation will form from the usual slag system to the new slag with Al 2O 3 content as high as 30 mass%. In addition, recent process changes in the BF including the increase of pulverized coal injection (PCI) also increased the con-centration of Al 2O 3 ...

Free Full-Text Effect of Silica Content on Iron Ore

2023.5.23 During the iron ore sintering process, its SiO2 content considerably affects the sinter quality. In this study, the effect of SiO2 content on iron ore sintering indexes was studied, with mineral

(PDF) Iron Ore Sintering: Quality Indices - ResearchGate

2017.5.2 the effect of chlorine and alkalis on sinter properties during. reduction (Lectard et al. 2003). The presence of alkalis favors ... and lower pore phase than high alumina iron ore sinter (Umadevi ...

Effect of MgO on Highly Basic Sinters with High Al2O3

2021.7.4 The increase of the proportion of high Al 2 O 3 content iron ore fine in iron and steel enterprises has brought about a series of problems such as the increase of the viscosity of blast furnace slag and the difficulty of the separation of slag and iron. In order to solve this problem, the effect of increasing MgO content on the technical and economic

Removal of Silica and Alumina as Impurities from Low-Grade Iron Ore ...

The effect of magnetic density on iron recovery and gangue removal was investigated at constant pulp flow using the expand metal as ... Sah, R. and Mahapatra, P.C. (2014) Influence of Sinter Basicity (CaO/SiO2) on Low and High Alumina Iron Ore Sinter Quality. Mineral Processing and Extractive Metallurgy, Transactions of the Institutions of ...

The Revolution of High Alumina Slag in Blast Furnace Process

2022.8.19 The alumina content can reach 15–17 wt% in the blast furnace slag if the high alumina iron ore is partially used. At present, the alumina content in the blast furnace slag in most Chinese steel plants is in this range. It is recommended that the lower limit of the (MgO wt%)/ (Al 2 O 3 wt%) ratio be 0.3.

Microstructure Analysis of Alumina Effect on Compressive

2022.4.5 In the present work, Gua Indian iron ore has been chosen for aluminous effect for physical properties such as cold compressive strength and tumbler index. The effect of alumina is expressed with the help of microstructure analysis and phase grains density of silicate, hematite, and magnetite, and pore phases present in the structure of

Physicochemical Properties of High Alumina Blast Furnace Slag

2018.1.19 As a result of the consumption and the rising cost of raw materials for ironmaking, steel producers have increased their utilization of low-cost, low-grade raw materials such as high alumina iron ore. The effect of Al 2 O 3 and the Al 2 O 3 /SiO 2 ratio on the viscosity, surface tension and sulfide capacity of the CaO–SiO 2 –Al 2 O 3 –MgO ...

Usage of High-LOI Iron Ore Fines in Pellet Making - Springer

2019.6.8 High-LOI iron ore fines are required for detailed laboratory pelletization studies and are used in pellet making. The received iron ore is martite–goethitic and hematite–goethitic form of ore with high LOI content. The iron ore consists of 57.7% Fe, 6.19% SiO2, 2.69% Al2O3, 8.80% moisture and 8.85% LOI. From thermo-gravimetric