Viscosities Behavior of CaO-SiO2-MgO-Al2O3 Slag With Low Mass Ratio of CaO to SiO2 and Wide Range of A12O3 Content

Tang, Xin; Zhang, Zuotai; Guo, Min; Zhang, Mei; Wang, Xi-dong

doi:10.1016/s1006-706x(11)60015-0

Cited by 82 publications

(41 citation statements)

References 18 publications

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“…Dados experimentais [3][4][5][6][7][8][9][10][11] obtidos na literatura foram comparados com valores calculados pelo software. Todos os dados foram medidos utilizando viscosímetro rotativo ou vibratório na amostra fundida de escória e abrangem uma ampla faixa de composições no sistema CaO-SiO2-Al2O3-MgO.…”

Section: Metodologiaunclassified

“…Forsbacka et al [3] focaram em escórias da produção de ferro-cromo. Kim et al [5] , Nakamoto et al [8] e Tang et al [10] deram ênfase nas escórias de alto-forno e, por fim, Jönsson et al [4], Yakushev et al [11] e Song et al [9] em escórias de refino secundário de aços. A tabela 1 mostra a variação da composição das escórias utilizadas no trabalho de Machin et al [6,7].…”

Section: Metodologiaunclassified

“…Song et al [9] Machin et al [6] Machin et al [7] Kim et al [5] Forsback a et al [3] Nakamot o et al [8] Tang et al [10] δ [3] , conforme já visto na figura 1. Os dados de Machin et al [6,7] forneceram as maiores variações.…”

Section: Metodologiaunclassified

“…Estas encontram-se principalmente na faixa de valores mais altos, compostas por um ternário, SiO2-CaO-Al2O3, com alta quantidade de sílica, muitas vezes sem a presença de alumina. Cálculos para escórias de alto-forno mostraram uma variação média alta, aproximadamente 36,7%, apesar do valor obtido com os dados de Tang et al [10] ser adequado. Um maior estudo deste tipo de escórias é necessário para aprimorar o software para esta aplicação.…”

Section: Metodologiaunclassified

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CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

Silva¹,

Bielefeldt²,

Vilela³

2018

ABM Proceedings

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ResumoEste estudo foca na análise do comportamento do módulo para cálculo da viscosidade de escórias fundidas do software FactSage 6.4. Foram utilizados dados da literatura e calculada a viscosidade de 972 escórias, no sistema CaO-SiO2-Al2O3-MgO, variando composição dentro da faixa de 2-58% de CaO, 7,4-70% de SiO2, 0-40% de Al2O3 e 0-38% de MgO, e temperatura na faixa de 1050-1750ºC. Foi encontrada uma tendência do software de produzir resultados com valores de viscosidades menores que os encontrados na literatura. O desvio médio entre os valores da literatura e calculados foi de 32,06%, segundo estudos da literatura é considerado adequado para viscosidades de escórias siderúrgicas fundidas. Palavras-chave: Escória; Viscosidade; Termodinâmica computacional. CaO-SiO 2 -Al 2 O 3 -MgO SLAG VISCOSITY CALCULATION USING FACTSAGE 6.4 SOFTWARE AbstractThis study focused on the behavior analysis of the viscosity module of the FactSage 6.4 software. A total of 972 slags were calculated using literature data from the CaOSiO2-Al2O3-MgO system, varying the composition on the range between 2-58% CaO, 0.4-70% SiO2, 0-40% of Al2O3 and 0-38% MgO. The temperature range was from 1050ºC to 1760ºC. The software showed a tendency to produce lower values than the ones on the literature data. The average deviation between the calculated and literature values was 32,06%, which according to literature studies is considered suitable for steelmaking molten slags viscosity.

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Section: Metodologiaunclassified

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CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

Silva¹,

Bielefeldt²,

Vilela³

2018

ABM Proceedings

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“…In the present study, the integral activation energy can be expressed as The parameters of B 1 , B 2 and B 3 were \optimized based on the oxide contribution ranges. 99 The experiment measurements confirmed that CaO and MgO negatively contributed to the activation energies, which represent the network breaking and reduce the slag viscosity. In contrast, the Al 2 O 3 and SiO 2 positively contributed to the activation energy, which represents the network-forming effect and improve the slag viscosity.…”

Section: Expressions Of Activation Energymentioning

confidence: 63%

Viscosity Studies of High-Temperature Metallurgical Slags Relevant to Ironmaking Process

Chen¹

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Abstract:Slags are molten oxides presenting in a number of high-temperature processes. In ironmaking process, the metallurgical properties of blast furnace slags are determined largely by its viscosity. Understanding and controlling the behavior of the slag phase is crucial in improving the operational and economical efficiencies. However, high-temperature viscosity measurement is practically difficult, time-and cost-consuming. There is a necessity to develop a reliable mathematical model for the viscosity prediction through the review of experimental data and fundamental theory.As foundation work, abundant viscosity measurements and models have been examined and evaluated, including over 3000 viscosity data in the CaO-MgO-Al 2 O 3 -SiO 2 system and 16 viscosity models. Over the past 10 years, there has been increasing attentions on wide composition range of slag viscosity due to the continuous consumption of complex iron ores.In addition, the impacts of eight minor elements (including F, Ti, B, Fe, Mn, Na, K, and S) on slag viscosity have been studied for practical purpose.Slag viscosity is determined by its structure, which is the theoretical base of the mathematical model. The structures of the quenched silicate slags were quantitatively investigated utilizing Raman spectroscopy. It is accepted that the application of Raman spectroscopy can disclosure the vibration units of molten slag, which can be interpreted the structural of silicate melts (amorphous glass phase).In the blast furnace operations, some solid phases such as oxide precipitates, coke or Ti(CN) can be present in the slag. In addition, the precipitation of solid particles was commonly observed in iron, steel, copper and other pyrometallurgy process. These solids can significantly increase the viscosity of the slag causing operating difficulty. There is a research gap that the solid impact on suspension was limited investigated under high-temperature condition due to uncertainty.Referring to the research gap of viscosity study of blast furnace slag, the following goals have been achieved by the Ph.D. candidate: Declaration by authorThis thesis is composed of my original work, and contains no material previously published or written by another person except where due reference has been made in the text. I have clearly stated the contribution by others to jointly-authored works that I have included in my thesis.

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Influence of Fe₂O₃‐FeS on the structure of iron‐containing clusters in aluminosilicate melts

Jiao

Mao

Zhang

et al. 2023

Asia-Pacific J Chem Eng

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Iron compounds addition on the melt is a more complex issue. Uncertainties in industrial applications are caused by crystallization and depolymerization phenomena. Most of the current studies have discussed FeO and Fe2O3, ignoring the influence of FeS in the glass structure. This study designed and simulated artificial ash close to coal ash to interact with the glass melt at high temperatures. Coulomb titration, X‐ray diffraction (XRD), and Raman analyses were carried out to determine the percentage and composition of crystalline and noncrystalline materials in the glass. Samples of FeS‐Fe2O3 were subjected to the enumeration of the glass structure and quantitative calculations of the degree of polymerization. The results showed that 15‐wt% Fe2O3 promoted crystallization in the system and accelerates the depolymerization of FeS. The introduction of FeS increases the amorphous materials, and the obtained amorphous materials are Si dominated network structures and [SiO4]‐[FeO4]‐[SiO4] clusters. The network tends to change from [FeOn] and [AlO4] to [SiO4]. In addition, aluminosilicate may enter FeS particles and unreacted FeS may deposit on the aluminosilicate surface.

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Viscosities Behavior of CaO-SiO2-MgO-Al2O3 Slag With Low Mass Ratio of CaO to SiO2 and Wide Range of A12O3 Content

Cited by 82 publications

References 18 publications

CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

Viscosity Studies of High-Temperature Metallurgical Slags Relevant to Ironmaking Process

Influence of Fe₂O₃‐FeS on the structure of iron‐containing clusters in aluminosilicate melts

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Viscosities Behavior of CaO-SiO2-MgO-Al2O3 Slag With Low Mass Ratio of CaO to SiO2 and Wide Range of A12O3 Content

Cited by 82 publications

References 18 publications

CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

CÁLCULO DA VISCOSIDADE DE ESCÓRIAS DO SISTEMA CaO-SiO2-Al2O3-MgO UTILIZANDO O SOFTWARE FACTSAGE 6.4

Viscosity Studies of High-Temperature Metallurgical Slags Relevant to Ironmaking Process

Influence of Fe2O3‐FeS on the structure of iron‐containing clusters in aluminosilicate melts

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Influence of Fe₂O₃‐FeS on the structure of iron‐containing clusters in aluminosilicate melts