Influence of sinter grate suction pressure (flame front speed) on microstructure, productivity and quality of iron ore sinter

The work deals with examination of the influence of the ratio between iron ore concentrate and iron ore on quality of produced iron ore sinter. One of the possibilities to increase iron content in sinter is the modification of raw materials ratio, when iron ore materials are added into sintering mixture. If the ratio is in favor of iron ore sinter, iron content in resulting sintering mixture will be lower. If the ratio is in favor of iron ore concentrate and recycled materials, which is more finegrained, a proportion of a fraction under 0.5 mm will increase, charge permeability property will be reduced, sintering band performance will decrease and an occurrence of solid particulate matter in product of sintering process will rise. The sintering mixture permeability can be optimized by increase of fuel content in charge or increase of sinter charge moisture. A change in ratio between concentrate and iron ore has been experimentally studied. An influence of sintering mixture grain size composition, a charge grains shape on quality and phase composition on quality of the produced iron sinter has been studied.

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Quality Estimation for the Iron Ore Sinter Obtained via Separate Blend Preparation

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.844.114 ◽

2020 ◽

Vol 844 ◽

pp. 114-123

Author(s):

Volodymyr Bochka ◽

Artem Sova ◽

Lina Kieush ◽

Oleksandr Hryshyn ◽

Alisa Dvoiehlazova

Keyword(s):

Iron Ore ◽

Mineralogical Composition ◽

Equivalent Diameter ◽

Sintering Process ◽

Iron Ore Sintering ◽

Positive Effects ◽

Iron Ore Sinter ◽

Iron Ore Sintering Process ◽

Ore Sintering

This paper reveals that obtaining high-quality sinter, improved or stabilized by its size and strength, is a challenge to be solved by embracing both the formation of sinter with the strong structure and the optimal mineralogical composition of its bonds during the preparation of the sintering blend. The existing technological schemes of iron ore sintering do not allow producing the sinter where the amounts of fines with 0-0.5 mm of fraction would be less than the typical amounts of 8.1-20.4%. Therefore, the study to establish how the blend preparation with the preliminary made composites affects the parameters of iron ore sintering process and the quality of the resulting sinter has been carried out. It has determined that the use of separate pre-granulation has commonly positive effects on the process of blend preparation, namely it significantly decreases the amount of non-granulated fraction of 0-1 mm and increases the equivalent diameter of the granules, reduces the standard deviation and variation coefficient, indicating the more homogeneous granulometric composition of raw granules.

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Dependence of flame front speed on iron ore sintering conditions

Mineral Processing and Extractive Metallurgy ◽

10.1080/03719553.2016.1166565 ◽

2016 ◽

Vol 125 (3) ◽

pp. 165-171 ◽

Cited By ~ 6

Author(s):

J. Zhao ◽

C. E. Loo

Keyword(s):

Flame Front ◽

Iron Ore ◽

Iron Ore Sintering ◽

Front Speed ◽

Ore Sintering ◽

Sintering Conditions

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Experimental investigation on the flame front resistance of gas channel growth with melt formation in iron ore sinter beds

Proceedings of the Combustion Institute ◽

10.1016/j.proci.2018.09.027 ◽

2019 ◽

Vol 37 (4) ◽

pp. 4607-4615 ◽

Cited By ~ 6

Author(s):

Hao Zhou ◽

Mingxi Zhou ◽

Pengnan Ma ◽

Ming Cheng

Keyword(s):

Experimental Investigation ◽

Flame Front ◽

Iron Ore ◽

Gas Channel ◽

Iron Ore Sinter

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Effect of Cooling Methods on the Strength of Silico-ferrite of Calcium and Aluminum of Iron Ore Sinter during the Cooling Process

Metals ◽

10.3390/met9040402 ◽

2019 ◽

Vol 9 (4) ◽

pp. 402

Author(s):

Xu Zhang ◽

Hao Bai ◽

Xin Lu ◽

Tian He ◽

Jian Zhang ◽

...

Keyword(s):

Mechanical Strength ◽

Iron Ore ◽

Cooling Process ◽

Slow Cooling ◽

Iron Ore Sinter ◽

Mass Fractions ◽

Mechanical Strengths ◽

Biot Numbers ◽

Cooling Methods

In the iron making process, a high mechanical strength is favorable for iron ore sinters in the blast furnace, and the bonding phase is regarded as one of the key components that determines the quality of the iron ore sinter, in which the silico-ferrite of calcium and aluminum (SFCA) is one of the typical phases. In this study, synthesized samples with different SFCA mass fractions were prepared to study the effect of different cooling methods on the strengths of the SFCA samples. The results showed that the strength of a sample could be improved by increasing the SFCA content during a temperature change. Further, the test results for the compressive strength suggested that the SFCA had a positive effect on the strength of the iron ore sinter during cooling, with slow cooling being significantly effective at preventing the generation of thermal stress. Moreover, the Biot number was introduced to normalize all of the cooling methods. The results showed that higher mechanical strengths for iron ore sinters will be obtained with higher SFCA content and lower Biot numbers, which will guide the evaluation of mechanical strength of iron ore sinter after the cooling process in industry.

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Influence of Iron Ore Fines Feed Size on Microstructure, Productivity and Quality of Iron Ore Sinter

ISIJ International ◽

10.2355/isijinternational.51.922 ◽

2011 ◽

Vol 51 (6) ◽

pp. 922-929 ◽

Cited By ~ 23

Author(s):

Tekkalakote Umadevi ◽

Angalakuditi Brahmacharyulu ◽

Ajay Kumar Roy ◽

Pradipta Chandra Mahapatra ◽

Manjunath Prabhu ◽

...

Keyword(s):

Iron Ore ◽

Iron Ore Sinter ◽

Iron Ore Fines

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Predicting iron ore sinter strength through partial least square regression (PLSR) analysis of X-ray diffraction patterns

Powder Diffraction ◽

10.1017/s0885715617001038 ◽

2017 ◽

Vol 32 (S2) ◽

pp. S66-S69

Author(s):

Nathan A.S. Webster ◽

Mark I. Pownceby ◽

Natalie Ware ◽

Rachel Pattel

Keyword(s):

Process Control ◽

Iron Ore ◽

Partial Least Square ◽

Least Square ◽

Process Conditions ◽

X Ray Diffraction ◽

X Ray ◽

Sinter Strength ◽

Iron Ore Sinter

The decrease in quality of Australian iron ore, coupled with the demand for more efficient energy use, means that closer monitoring and optimisation of process conditions for iron ore sinter production is required. Here, the suitability of using partial least-squares regression analysis of powder X-ray diffraction data, collected for iron ore sinter samples, for the prediction of iron ore sinter strength has been further assessed. In addition, a preliminary assessment of the effect of 2θ range on the quality of prediction has been made. For the purposes of process control, the level of correlation between predicted strength and actual sinter strength would inform an operator whether or not the process was operating within the acceptable limits, or whether there was a potential problem requiring further investigation or rapid intervention. Reducing the 2θ range was found to reduce the level of correlation between predicted and actual strength, to a point where the particular analysis may no longer be suitable for process control.

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