DOI: 10.1016/J.JMRT.2021.03.054 Corpus ID: 233667049; Effect of alumina occurrence on sintering performance of iron ores and its action mechanism @article{Xue2021EffectOA, title={Effect of alumina occurrence on sintering performance of iron ores and its action mechanism}, author={Yu-xiao Xue and Jian Pan and De‐qing Zhu and Zheng-qi Guo …
WhatsApp: +86 18221755073Kaolinite is a common gangue mineral in iron ore and sodium silicate has been used widely as a dispersant of silicate gangue minerals including kaolinite in various iron-ore flotation methods over a wide range of pH. Its actual dispersive effect on kaolinite under iron-ore flotation conditions has received very limited attention, however. The …
WhatsApp: +86 18221755073With the intensified depletion of high-grade iron ores, the increased aluminum content in iron ore concentrates has become unavoidable, which is detrimental to the pelletization process. Therefore, the effect mechanism of aluminum on pellet quality must be identified. In this study, the influence of aluminum occurrence and content on …
WhatsApp: +86 18221755073Indian low grade iron ores mostly contain quartz, gibbsite, and clay as the major impurities.Depending upon the ore characteristics, in many instances froth flotation has to be used to recover the hematite and other iron oxides from the ground ores. In this context, the difference in silica and alumina content in low grade iron ores is brought to …
WhatsApp: +86 18221755073The 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 …
WhatsApp: +86 18221755073The 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 …
WhatsApp: +86 18221755073The inclusion of elements such as alumina, silica, and phosphorous in small amounts may have serious effects on the steel quality. The phosphorous content in iron ore is very important; its increased levels in produced steel give cold shortness, which leads to brittleness and poor toughness.
WhatsApp: +86 18221755073Facing the consumption of high-grade iron ore, high-alumina iron ore emerges as a potential alternative for steel companies aiming to cut costs and address resource shortages. This study systematically investigated the impact of increasing the proportion of high-alumina iron ore on sintering performance through sinter pot tests.
WhatsApp: +86 18221755073Similarly results on a variety of iron ores show that high silica content as quartz in the ore causes less hindrance in the flotation of iron ore, whereas the presence of silica as clay inhibits ...
WhatsApp: +86 18221755073Iron ore pellets are largely characterized by inherent physical and chemical properties of the ore. Alumina and silica play important roles in determining the productivity of a Blast Furnace. On average, one percent increase in iron content improves productivity by 2% and reduces coke consumption by 1%. Therefore higher iron ore …
WhatsApp: +86 18221755073Al 2 O 3 content up to 2.53% proves beneficial for improving sinter reduction index. The major phases found in all resultant sinters by X-ray diffraction are hematite, …
WhatsApp: +86 18221755073In order to achieve better understanding about the effect of alumina on sintered iron ore, three kinds of powdered iron ores were investigated under similar condition of identical alumina source ...
WhatsApp: +86 18221755073As higher-grade ores become depleted, there will be a greater focus on developing suitable beneficiation strategies to treat low-grade hematite-goethite ores …
WhatsApp: +86 18221755073Accordingly, they ar are classified as preferred, tolerable and not amenable fo for processing. Based on this, necessary caution is ex exercised while procuring the iron ore fines for their benef neficiation plant. A 3.0 Mtpa beneficiation plant is in opera eration with the primary objective of reducing alumina and silica in iron ore fines.
WhatsApp: +86 18221755073The 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.
WhatsApp: +86 18221755073Hence, in search of an alternative source of iron ores, the steel industries are forced to use low-grade ores. The large amount of iron ore slimes accumulated in slime ponds at mine sites also poses a challenge for the environment. Iron ore slimes typically consist of iron, alumina, and silica at a wide range of sizes and densities.
WhatsApp: +86 18221755073Effects of basicity, B (CaO:SiO2 ratio) on the thermal range, concentration, and formation mechanisms of silico-ferrite of calcium and aluminum (SFCA) and SFCA-I iron ore sinter bonding phases have been investigated using an in situ synchrotron X-ray diffraction-based methodology with subsequent Rietveld refinement-based quantitative …
WhatsApp: +86 18221755073ore also contains silica and alumina of 31.10 mass% and 7.65 mass% respective-ly. Mineralogical analysis was done using RINT Rigaku X-ray diffractometer as ... The effect of feed pulp density on ...
WhatsApp: +86 18221755073Baivumebo iron ore is special magnetite containing fluorine, kalium and sodium elements, and the main raw material for ironmaking of Baotou Iron and Steel (Group) Co. The effects of basicity and ratio of Al2O3 to SiO2 (A/S) on the formation of silico-ferrite of calcium and aluminium (SFCA) in Baivumebo low silica sinters were …
WhatsApp: +86 18221755073The quality of sinter is judged by its chemical, physical and metallurgical properties, which are required for blast furnace. When maximum alumina content in the iron ore fines is 1·5%, alumina to silica ratio of <1·0 is considered to be ideal for blast furnace operation (Rao et al., 2009).Higher alumina to silica ratio, >1·0, is detrimental …
WhatsApp: +86 18221755073This study was carried out to determine the possibility of reducing the iron oxide ratio in silica sand from Ardhumah, an area, (18) km west of Rutba, a city in Al-Anbar Governorate, to obtain ...
WhatsApp: +86 18221755073During 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 composition and microstructure analyses. It was shown that the strength and reducibility of sintering products improved when SiO2 content increased. …
WhatsApp: +86 18221755073Aluminosilicate refractories are manufactured using refractory clays, sillimanite minerals, bauxite, and mixtures of alumina and silica sand. They will refer, somewhat arbitrarily, to common crystalline compounds with melting temperatures of at least 1500 °C [2].The major categories of traditional refractories are fire clays, high …
WhatsApp: +86 18221755073Iron ores always contain several forms of alumina, which may have different effect on sintering performance. In this paper, sinter pot tests were systematically conducted with various alumina ...
WhatsApp: +86 18221755073Alumina affects the sintering of iron ore. The most harmful effect of alumina is to worsen the RDI (reduction degradation index) value of sinter. RDI value increases as the alumina content rises. ... Alumina refractories are the part of alumina- silica (SiO2) group of refractories and belong to the Al2O3-SiO2 phase equilibrium system. They ...
WhatsApp: +86 18221755073In this study, the effect of SiO 2 content on iron ore sintering indexes was studied, with mineral composition and microstructure analyses. It was shown that the …
WhatsApp: +86 18221755073The 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 °C to 1350 °C) and at oxygen partial pressure of 5 × 10−3 atm has been characterized using in situ synchrotron X-ray diffraction. SFCA and SFCA …
WhatsApp: +86 18221755073Semantic Scholar extracted view of "Effect of alumina and silica content in the calcium aluminosilicoferrite Ca2(Ca,Fe,Mg)6(Fe,Si,Al)6O20 bonding phase on the strength of iron ore sinter" by R. Mežibrický et al.
WhatsApp: +86 18221755073With increasing alumina content in sinter of both the conventional and selective granulation process, the fractions of hematite and of silico-ferrites of calcium …
WhatsApp: +86 18221755073This 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 …
WhatsApp: +86 18221755073