Producing high-basicity sinter from low-silica ore

Didevich, A. V.; Khlaponin, N. S.; Vas’kevich, M. Ya.; Zotov, A. V.; Peftiev, E. I.; Левченко, В. И.; Khrapko, N. I.

doi:10.3103/s0967091208070127

Cited by 3 publications

(1 citation statement)

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“…Sinter quality mainly depends on the liquid phase consolidation, which could be affected by various factors. In earlier and recent years, considerable attentions were focused on the MgO content and basicity (CaO/SiO 2 ) of sinter because of their important effect on the quality of the bonding phase, mineral compositions, formation mechanism and various physicochemical properties of product sinter [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Shi

Zhu

Pan

et al. 2019

Ironmaking & Steelmaking

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In this paper, the combined effects of MgO and basicity (CaO/SiO 2 ), varied by changing the ratio of dolomite and burnt lime to sinter mix, on sintering of magnetite concentrates were investigated in pilot scale. Mineralogy of sinter with various MgO and basicity was analyzed by light microscope and scanning electron microscope (SEM). The results show that increasing MgO led to lower sinter strength and higher fuel consumption, while increasing basicity behaved in the opposite way. Regardless of MgO content, minimum sinter strength occurred in basicity 1.2-1.6, which should be avoided in sinter production. Less SFCA (silicoferrites of calcium and aluminum) and more magnetite were observed in sinter with higher MgO content. Aside from hematite and magnetite, the dominant phases in sinter with low (0.8) and high (2.2+) basicity were glass and SFCA respectively. Sinter with basicity 1.6 had highest crack density and this would inevitably reduce its cold strength.

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Section: Introductionmentioning

confidence: 99%

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Shi

Zhu

Pan

et al. 2019

Ironmaking & Steelmaking

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Effect of basicity on sintering behavior of low-titanium vanadium–titanium magnetite

Yang

Zhou

Jiang

et al. 2015

Transactions of Nonferrous Metals Society of China

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Characterisation of iron ore sinter products with varying binary basicity (CaO/SiO₂) from 1.5 to 2.7

Wei,

Yang,

Zhu

et al. 2024

Ironmaking & Steelmaking: Processes, Products and Applicati

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Iron ore sinter is one of most extensively utilised ferrous burdens for blast furnace (BF) worldwide. The sinter quality greatly depends on the microstructure and chemical compositions of calcium ferrites which is significantly affected by sinter basicity (mass ratio of CaO to SiO2). The characterisation of iron ore sinter products with varying binary basicity (CaO/SiO2) from 1.5 to 2.7 was studied by using optical microscopy and scanning electron microscopy-energy spectrometer (SEM-EDS). The results show that the change of sinter basicity changes the microstructure and composition of silico-ferrite of calcium and aluminium (SFCA), and more dendritic shape composite calcium ferrite (SFCA) with Fe-rich/low-Si is generated. Under the optical microscope, statistical results of the sinter reveal that with the increase in basicity, the aspect ratio of calcium ferrite increases from 2.35 to 7.69, indicating a gradual refinement of the crystals. Moreover, the distribution of crystals becomes more uniform, and the size of pores between crystals also decreases gradually, thereby the mechanical properties of the sinter from a microscopic structural perspective being enhanced. SEM-EDS analysis studies have found a certain linear relationship between the aspect ratio of SFCA and its iron content, where higher iron content in SFCA leads to finer and narrower SFCA formations. Additionally, an increase in basicity favours the generation of more composite calcium ferrite (SFCA) with Fe-rich/low-Si characteristics, which significantly improves the reducibility of the sinter. Moreover, what is even more interesting is that the iron content in SFCA shows an inverse relationship with the content of silicon, calcium and aluminium elements, yet it is directly proportional to the quaternary basicity [(CaO + MgO)/(SiO2 + Al2O3)] in SFCA.

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Producing high-basicity sinter from low-silica ore

Cited by 3 publications

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Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Effect of basicity on sintering behavior of low-titanium vanadium–titanium magnetite

Characterisation of iron ore sinter products with varying binary basicity (CaO/SiO₂) from 1.5 to 2.7

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Producing high-basicity sinter from low-silica ore

Cited by 3 publications

References 0 publications

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Combined effect of MgO and basicity varied by different dolomite and burnt lime addition on sintering performance of magnetite concentrates

Effect of basicity on sintering behavior of low-titanium vanadium–titanium magnetite

Characterisation of iron ore sinter products with varying binary basicity (CaO/SiO2) from 1.5 to 2.7

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Characterisation of iron ore sinter products with varying binary basicity (CaO/SiO₂) from 1.5 to 2.7