Granulation Effectiveness of Iron Ore Sinter Feeds: Effect of …

Granulation of sinter feeds is an indispensable step in the iron ore sintering process. Through granulating, iron ore fines, fluxes, fuels and recycle materials (e.g., return fines, dust, etc.) are made into granules that possess appropriate moisture, reasonable size distribution and good bed permeability for sintering.The granulation behavior of a particular ore mix determines the …

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Control of the grain size distribution of T the raw …

fraction and the –0.5 mm coke breeze fraction improves the granulation index and permeability of the green sinter bed16. This led to a suppression in the shrinkage of the sinter cake, an increase in sintering rate (and therefore productivity), as well as improved reducibility due to an increase in the number of fine pores.

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OPTIMAL MIXING AND GRANULATION PROCESS FOR …

The typical sinter feed (0.15;-6.3 mm) has become limited and the rapid growing production resulted in more and more fine ore (< 150 μm) availability in the market.

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Reductants in iron ore sintering: A critical review

The granulated ore requires suitable granulometry for furnace reduction, whereas sinter feed and pellet feed, being fine ore fractions, cannot be directly used due to potential furnace clogging and gas transport impediments (Mohammad et al., 2023).

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(PDF) Ore mineralogy and its relevance for selection of concentration

spiraling for fine sinter feed, deslimi ng and flotat ion (column only), products ar e tra nsport ed by 5 km lon g convey or belt syste m to Andaim e train load ing termina l

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Influence of Iron Ore Fines Feed Size on Microstructure, …

Sinter with iron ore mean particle size of 2.59 mm (Classifier fines) yielded better sinter strength with lower fines (–5 mm) and lower RDI. Higher sinter strength is due to effective distribution of …

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A finite difference model of the iron ore sinter process

sensitivities to parameters such as feed void fraction, feed coke percentage, and the fraction of combustion heat transferred to the gas phase. A model validation and improvement study should follow, ensuring sinter test results are free from experimental errors by …

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Segregation Charging Behavior of Ultra-Fine Iron Ore

Abstract The sinter–briquette complex firing process which is an effective technology for utilization of low grade ultra-fine ore is a method for charging sinter feed mixed with briquette made of ultra-fine ore. To uniformly fire briquettes using the excess heat from the lower part of the sinter feed bed, they must be segregated in that region. In this study, the particle …

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Granulation behaviour of specularite fines in ferrous sinter …

Granulation of the sinter feed mix is a key step in the overall sintering process (Litster and Waters, 1988). Therefore, it is important to investigate the granulation behaviour of …

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Study of iron ore sinter when fine ore is replaced with …

The effect of replacing fine iron ore by coarse iron ore in the sinter mixture on sinter properties was studied using an infrared furnace and sinter pot tests. A two-level full factorial design was used for the identification of parameters that ... Study of iron ore sinter when fine ore is replaced with coarse ore, using infrared furnace and ...

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Air classification of blast furnace dust collected in a fabric …

By air classification, a dust can be separated into a coarse fraction and a fine fraction. Some components which are usually unwanted in recycled dust like alkali chlorides and Zn and Pb are often enriched in the fine dust fraction. ... Therefore, blending of the sinter plant feed material must keep the zinc concentration in the sinter feed ...

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Granulation behaviour of a sinter mixture with high …

Sinter is the most widely used iron-bearing material in the majority of world's blast furnaces [1,2] and its production involves two main steps, the granulation (cold agglomeration) and the high-temperature sintering.The performance of the sintering machine is closely related to the granulation step, which aims to produce larger and homogeneous granules from fine raw …

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A finite difference model of the iron ore sinter process

Iron ore fines are agglomerated to produce sinter, which is an important feed material for blast furnaces worldwide. A model of the iron ore sintering process has been developed with the …

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Voidage of Ferrous Sinter Beds: New Measurement …

The technique is reproducible to ±0.005 void fraction. This technique is used to study in detail the factors which determine the voidage of packed beds of granulated ferrous sinter feed. 10 ...

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Understanding Sinter and Sinter Plant Operations

Its granulometric distribution is an important process parameter for sinter quality. The 10-30 mm fraction is sent directly to the blast furnace storage bins, the larger fraction is crushed to obtain smaller sized fractions, and the minus 5 mm fraction (return fines) is recycled to the sinter plant hoppers. ... to obtain a minimum of 90 % of ...

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Sintered Iron-Ore Manufacturing Capabilities when Using …

Abstract In order to create thermal conditions that form the same time-temperature conditions throughout the height of the sinter-feed mixture after (1) blending, (2) source material pelletizing, (3) laying on the fire grate, (4) initial layer heating under the ignition hood, and (5) ignition of the solid charge fuel, a natural gas-air mixture with an air flow coefficient > 3.5 is …

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Effect of Metallic Iron Sinter Feed on Sinter Mineralogy and Quality

Effects of Metallic Content on Sinter Cooling Rates. Figure 2 shows the temperature readings registered by thermocouples during sintering and cooling at low vacuum (4-in. Hg or 13.5 kPa) and high vacuum (6-in. Hg or 20.1 kPa) condition. It can be seen that high metallic iron feed (HI) sintering test had lower peak temperature at upper part of bed and …

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Characterization and Beneficiation of Dry Iron Ore …

results in generation of coarser fraction known as sized ore hav-ing size from 10 to 40 mm and used in blast furnace while soft goethite-rich mineral tends to generate fine fraction known as fine ore having size below 8 –10 mm. Dry processing of iron ore is popular for treating hard massive hematitic ores; however,

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(PDF) Iron ore sintering. Part 1. Theory and practice of the sintering

Sintering is a process by which a mixture of iron ores, fl uxes and coke is agglomerated in a sinter plant to manufacture a sinter product of a suitable composition, quality and granulometry to be ...

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OPTIMAL MIXING AND GRANULATION PROCESS FOR …

degradation. The typical sinter feed (0.15;-6.3 mm) has become limited and the rapid growing production resulted in more and more fine ore (< 150 μm) availability in the market. The sinter plant operators are facing several new challenges since the mixing and granulation- and the sintering behavior of the fines containing mixtures often ...

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Control of the grain size distribution of T the raw …

During agglom-eration through sintering, the raw material mixture first goes through a granulation process. In this process the iron ore fines, coke breeze, limestone and return sinter are mixed …

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Iron Ore Sinter

Automated optical image analysis of natural and sintered iron ore. E. Donskoi, ... 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 …

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Modeling Sintering Process of Iron Ore

24 Sintering Methods and Products selected operational parameters and raw materials the quality of the sinter produced can vary widely and can strongly effects the subsequent blast furnace process operation.

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Kinetics of iron ore sinter feed granulation

The kinetics of iron ore sinter feed granalation were shown to have a major impact on granule size distribution. At laboratory scale, it was shown that granule growth continued until a maximum stable size distribution was achieved. ... Nagano et al. [6] reported that the volume fraction of very fine particles (< 0.125 mm) must be low in order ...

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Evaluation of Iron Ore Concentrate and Micropellets as …

The use of iron ore concentrate has become of interest as the demand for higher grade sinter feed is increasing. The fine nature of the concentrate however raises concerns as it can affect permeability ... Figure 2: Relationship between bed void fraction and particle size distribution, V l

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Iron Ore Fines Granulation in a New High Speed Mixing Granulator …

Rankin WJ, Roller PW (1985) The measurement of void fraction in beds of granulated iron ore sinter feed. Trans Iron Steel Inst Jpn 25(10):1016–1020. Article CAS Google Scholar Cores A, Muñiz M, Ferreira S, Robla JI, Mochón J (2012) Relationship between sinter properties and iron ore granulation index.

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Potential of Air Classification for Zinc Management in …

11) The off-gas from the sinter plant is usually de-dusted by an electrostatic precipitator (ESP). The ESP dust is usually recycled in the sinter plant. In this case all Zn contained in the feed material of the sinter plant is finally contained in the sinter produced. In some sinter plants the dust collected in the last electrical field of the ESP

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(PDF) Influence of Iron Ore Fines Feed Size on …

In the sinter mix, compared to other raw materials the iron ore proportion is at higher side and its size fraction is more important. Several sinter plants are using smaller than 10 mm size as sinter feed with maximum 15% –0.150 mm size fines.

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Eff ects of Fine Iron Ore on Sinter Resistance and Permeability

Since iron ore proportion is at higher side in the sinter mix, its size fraction is very important. JSW Steel sinter plant receives iron ore fines of-10 mm size from Bellary-Hospet region which consist of 3 to 9% bigger than 10 mm and 30 to 35% smaller than 0.15 mm size fraction. ... In order to maintain iron content and gangue levels of sinter ...

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Granulation Effectiveness of Iron Ore Sinter Feeds: Effect …

This paper developed a quantitative understanding of the effect of ore properties on granulation effectiveness for different iron ore types based on the mechanistic model proposed by J.D. Litster ...

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