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J.R. Manuel, in Iron Ore, 2015. 4.2.2 Sinter. Low-temperature (< 1300 °C) iron ore sinter is an agglomerate of unmelted and partially melted nuclei particles (+ 1 mm) and a matrix bonding phase produced from the melting of fine ore (− 1 mm) and flux particles, with the majority of melt formation occurring in the granule adhering fines layer ...
In reality, alumina differentials can also be assessed by observing non-mainstream low-alumina iron ore brands such as CSN'S IOC 6, Trafigura's Sudeste and SNIM's TZFC fines. BRBF's vastly different characteristics, origin and customer base can lead to price divergences with the MNP products.
hot metal. The present day specifications of iron ore are . Physical Close sized lumps mostly (-40mm +10mm) {However, fines (-10mm) are also used after sintering}. Chemical High in Fe (65% Fe) content and low in alumina (preferably less than 2.5%) Higher the iron content in the ore higher is the blast furnace productivity (as per the operating
and phases present in iron ore sinter are hematite (Fe 3), magnetite (Fe 4), Investigation into how the magnesia, silica, and alumina contents of iron ore sinter influence its mineralogy and properties by M.K. Kalenga* and A.M. Garbers-Craig† Synopsis The influence of varying amounts of magnesia, silica, and alumina in
The roles of A1 2 O 3 and MgO on the evolution of phases in iron ore sinters have been investigated by simulated sintering in the laboratory using natural ores, commercial grade limestone and analytical grade A1 2 O 3 and MgO. A1 2 O 3 may not be necessary for the formation of SFCA in sinters if the sintering temperature is below 1300°C and the sintering time is short.
May 14, 2018· Effects of alumina on sintering performance of hematite iron ores. ISIJ International, 47(3), 349-358. 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.
Table 3 shows the sintering properties varied with iron ore type. The productivity of the sinter ranged from 29.89 to 40.45 t/m2.24h; the RDI ranged from 24.85 to 36.02 %; the proper moisture of raw mix, 5.5-8.9 mass % (Table 3). The sinters made from the low alumina commercial iron ores (S3, S1, S5) presented the lower coke rate (75.38-77.45 kg/t
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.
If the slime or any other iron ore which having the high Alumina percentage is feed into the blast furnace means it will affect total system, the below context gives the effect of alumina presence in the blast furnace feed. The alumina content in iron ore fines used in sinter …
an iron ore sintering plant revealed that the addi-tion of blue dust with red mud to the iron ore sin-ter mixture charge would overcome the problems arising from the RM addition to the sinter charge, like dilution of the sinter iron content, sinter qual-ity, strength and productivity [26]. Trushko et al.
Considering the gradual depletion of high-grade ore reserve, it is essential to avoid the loss of valuables in the form of fines and slimes and to exploit low-grade resources.Further, reduction degradation behavior of the sinter=pellet can be improved considerably by lowering its alumina and silica content and enhancing its iron content.
Abstract. The influence of varying amounts of magnesia, silica, and alumina in iron ore sinter on its mineralogy, reducibility index (RI), reduction disintegration index (RDI), physical breakdown (AI and TI), and production properties (coke breeze rate) were examined.
【Abstract】 <>Worldwide demand for iron ore has increased drastically,driven by the massive growth of steel production in China.Hence, many steel mills in the Asia-Pacific region,where sinter usually constitutes a significant proportion of the blast furnace feed,will have to use low-cost iron ores containing high alumina content in their sinter blends for either economic reasons,or due ...
Goethite Rich Iron Ore Sinter Dr. Kalpataru Rout Sr. Manager, Quality Control Laboratory, NINL, Duburi, Jajpur, Odisha 755026, India. [email protected] Abstract: In this paper the influence of structural water present in goethite rich ore fines on sinter properties like mean size, RI, RDI, TI, AI and microstructure were studied.
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.
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.
However, the high utilization of imported iron ores has also given rise to some problems. Iron ores containing a high content of Al 2 O 3 make up relatively higher proportions of those imported, though these have been verified to have adverse effects on the quality and metallurgical properties of sinter [3,4].Moreover, the SiO 2 content in imported iron ores is relatively lower than that of ...
This research investigated the sintering characteristics of sinter blends produced from. Agbaja iron ore concentrate of high phosphorus (P2O5 = 1.50 – 2.14%) and low silica. content and Itakpe iron ore concentrate of low phosphorus (P = 0.03%) and high silica in. order to produce fluxed sinters suitable for pig iron production.
Apr 15, 2005· The sinters made from the dense low alumina iron ores presented the higher tumbler strength and the lower coke rate, but the RDI was not simply related to the alumina level of iron ore. A high alumina ore may produce the sinter with a very low or very high RDI. The sintering properties of blending ores, including productivity, TI, RI, suitable ...
Chapter4 Agglomeratesin Iron-MakingProcesses 79 4.1 Preamble 79 4.2 Agglomeratesin Iron-MakingProcesses 80 4.2.1 IronOrePellets inDirectReduction(DR) 80 4.2.2 IronOrePellets inBFIronMaking 80 4.2.3 IronOre Sinter in BFIron Making 83 4.3 Properties ofAgglomerates 84 4.3.1 ColdStrength 84 4.3.2 ReductionDegradationIndex(RDI) 84 4.3.3 Reducibility 85
Jan 27, 2006· The sinters made from the dense low alumina iron ores presented the higher tumbler strength and the lower coke rate, but the RDI was not simply related to the alumina level of iron ore. A high alumina ore may produce the sinter with a very low or very high RDI. The sintering properties of blending ores, including productivity, TI, RI, suitable ...
Key words: iron ore sinter, properties, chemical composition, grain size distribution, product standardization. Abstract. The article systematizes the definition of sintering products and describes the classification of products produced and standardization of iron ore sinter according to the characteristics of chemical composition.
Low Al fines Sinter Feed Low Alumina (SFLA) is another premium ... Phosphorous (P) worsens steel mechanical properties, ... Hot metal P content(%) Iron ore sintering P content (%) 0.010 0.020 0.030 0.040 0.050 0.060 0.070 0.080 0.090 Costs vs. P content Single basic oxygen furnace
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).
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.
Iron ore sinter is a complex composite material of ~40–70 wt% iron oxides (hematite, Fe 2 O 3, and magnetite, Fe 3 O 4), 20–50 wt% Ca-rich ferrite phases, up to 10 wt% glasses, and up to 10 wt% calcium silicates of which larnite, Ca 2 SiO 4, is the most common (Patrick and Lovel, Reference Patrick and Lovel 2001). Most of the Ca-rich ...
Earlier work with iron ore and iron ore fine/slime indi-cates that beneficiation of iron ore and fine/slime containing very low iron and high alumina and silica is quite difficult. Also, it is equally difficult to know the characteristic proper-ties of the particles where most of the population is below 50 micron.
Usually limonitic and goethite ore are associated with higher alumina and LOI. The conventional sintering process is one of the well established processes for high quality hematite ore. It does not fully respond to the low grade iron ore associated with goethite and limonite. This has led to deterioration in sinter properties and productivity.