Influence of drying temperature and atmosphere on the mechanical strength of iron-ore agglomerates and sodium silicates for application in sintering processes

2015 ◽  
Vol 94 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Flávio de Castro Dutra ◽  
Marcus Emrich ◽  
Geraldo Magela da Costa ◽  
Anderson Dias
Keyword(s):  
Mechanical Strength ◽  
Iron Ore ◽  
Drying Temperature ◽  
Sintering Processes ◽  
Sodium Silicates

scholarly journals Microstructure and Minerals Evolution of Iron Ore Sinter: Influence of SiO2 and Al2O3

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 449 ◽  
Author(s):  
Ji ◽  
Zhao ◽  
Gan ◽  
Fan ◽  
Chen ◽  
...  
Keyword(s):  
Mechanical Strength ◽  
Calcium Silicate ◽  
Iron Ore ◽  
Sio2 Content ◽  
Al2o3 Content ◽  
Sinter Quality ◽  
Iron Ore Sinter ◽  
Research Findings ◽  
Functional Mechanisms ◽  
Sintering Processes

SiO2 and Al2O3 are two important minerals that can affect the mechanical and metallurgical properties of sinter. This investigation systematically studied the influences of these minerals and revealed their functional mechanisms on sinter quality. Results showed that with an increasing Al2O3 content in sinter, the sintering indexes presented an improvement before the content exceeded 1.80%, while the quality decreased obviously after the content exceeded 1.80%. With an increasing SiO2 content, the sinter quality presented a decreasing tendency, especially when the content exceeded 4.80%. Consequently, the optimal content of Al2O3 was ≤1.80% and that of SiO2 was ≤4.80%. The evolution of the microstructure and minerals in sinter showed that enhancing the Al2O3 content increased the proportion of SFCA generated, which improved the sinter’s mechanical strength, while excessive Al2O3 led to the formation of sheet-like SFCA with weak mechanical strength. Increasing the content of SiO2 strained the formation of SFCA and promoted the formation of calcium silicate, the mechanical strength of which is lower than that of SFCA. The research findings will be useful in guiding practical sintering processes.

The Optimal Content of Liquid Glass in the Raw Material Mixtures in the Briquettes Production

2020 ◽  
Vol 989 ◽  
pp. 678-683
Author(s):  
Leonid I. Polyansky ◽  
Nikolai A. Babailov ◽  
Yuri N. Loginov
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Liquid Glass ◽  
Iron Ore ◽  
Mechanical Characteristics ◽  
Raw Material ◽  
Minimum Amount ◽  
Technological Line ◽  
Iron Ore Concentrate

The results of the mechanical characteristics determining the briquettes during the roll briquetting of the raw mixtures are presented. The fine fractions briquetting process of iron ore concentrate and ferrosilicon manganese with the liquid glass as a binder was investigated. The mechanical strength briquettes data for low and high stresses of the mixtures briquetting are obtained. According to the results of the briquettes test for dropping and crushing, the minimum amount values of binder in the mixtures are obtained. They provide a sufficient level of the briquette mechanical properties. The automated technological line for roll briquetting of raw mixtures with a binder is presented.

Formation of Ceramic Crock Structure Made of Technogenic Raw Materials with Vanadium Component

2015 ◽  
Vol 756 ◽  
pp. 250-256 ◽  
Author(s):  
Andrey Stolboushkin ◽  
Alexey Fomin ◽  
Oxana Stolboushkina
Keyword(s):  
Iron Ore ◽  
Raw Materials ◽  
Pore Space ◽  
Ceramic Materials ◽  
New Mineral ◽  
Ceramic Structure ◽  
Porous Texture ◽  
Mineral Phases ◽  
Technogenic Raw Materials ◽  
Sintering Processes

The present study provides chemical, granulometric and mineral compounds of raw materials of ceramic charge. The ceramic materials structure made of slimy part of iron ore wastes with corrective additions has been observed by the SEM, petrographic methods and spectral analysis. The introduction of corrective additions leads to formation of crock with evident glass ceramic structure describable by porous texture. Pore space is completely or partially filled with cryptocrystalline substance. It has been determined vanadium component intensifies sintering processes during the firing and leads to formation of new mineral phases. This increases the strength of ceramics.

scholarly journals Unintentional production of persistent chlorinated and brominated organic pollutants during iron ore sintering processes

2017 ◽  
Vol 331 ◽  
pp. 63-70 ◽  
Author(s):  
Sumei Li ◽  
Guorui Liu ◽  
Minghui Zheng ◽  
Wenbin Liu ◽  
Jinhui Li ◽  
...  
Keyword(s):  
Organic Pollutants ◽  
Iron Ore ◽  
Iron Ore Sintering ◽  
Ore Sintering ◽  
Sintering Processes

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

Metals ◽  
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.

scholarly journals Atmospheric emission of polychlorinated naphthalenes from iron ore sintering processes

Chemosphere ◽  
2012 ◽  
Vol 89 (4) ◽  
pp. 467-472 ◽  
Author(s):  
Guorui Liu ◽  
Minghui Zheng ◽  
Bing Du ◽  
Zhiqiang Nie ◽  
Bing Zhang ◽  
...  
Keyword(s):  
Iron Ore ◽  
Atmospheric Emission ◽  
Polychlorinated Naphthalenes ◽  
Iron Ore Sintering ◽  
Ore Sintering ◽  
Sintering Processes

scholarly journals Study on high temperature sintering processes of selective laser sintered Al2O3/ZrO2/TiC ceramics

2009 ◽  
Vol 41 (1) ◽  
pp. 35-41 ◽  
Author(s):  
P. Bai ◽  
Y. Li
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
High Temperature ◽  
Mechanical Strength ◽  
Relative Density ◽  
Sintering Temperature ◽  
Sintering Time ◽  
Sintering Processes ◽  
Al2o3 Matrix

High temperature sintering processes of selective laser sintered Al2O3/ZrO2/TiC ceramics were studied. The effects of the sintering temperature and the sintering time on the relative density, strength and fracture toughness of Al2O3/ZrO2/TiC ceramics were investigated. The results showed that the sintering temperature and sintering time had a great effect on the relative density and the mechanical properties of Al2O3/ZrO2/TiC ceramics. The mechanical strength increased from 120MPa to 360MPa and KIC increased from 3.7 J/m2 to 6.9 J/m2 when the sintering temperature increased from 1400?C to 1600?C, however, the mechanical strength decreased rapidly from 370MPa to 330MPa and KIC decreased from 6.9 J/m2 to 6.1 J/m2 when the sintering time increased from 30min to 90min. Furthermore, the addition of TiC and ZrO2 in the Al2O3 matrix significantly improved mechanical strength and fracture toughness of the Al2O3 matrix ceramics.

Mechanical strength of iron-ore pellets

Metallurgist ◽  
1975 ◽  
Vol 19 (3) ◽  
pp. 156-159
Author(s):  
I. A. Kopyrin ◽  
I. F. Graur ◽  
F. A. Ryabokon' ◽  
N. M. Solov'ev
Keyword(s):  
Mechanical Strength ◽  
Iron Ore ◽  
Iron Ore Pellets ◽  
Ore Pellets

scholarly journals Effect of Serpentine on Mechanical Strength and Reducibility of Iron Ore Briquettes.

1994 ◽  
Vol 34 (8) ◽  
pp. 631-640 ◽  
Author(s):  
Egberto B. Bedolla ◽  
Guillermo S. Mendoza ◽  
José R. Lemus
Keyword(s):  
Mechanical Strength ◽  
Iron Ore
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