EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG

Xie, Chunshai

doi:10.13168/cs.2016.0022

Cited by 8 publications

(3 citation statements)

References 7 publications

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“…The diopside-based glass-ceramic in the CaO-MgO-Al 2 O 3 -SiO 2 (CMAS) system is one of the most widely applied glass-ceramics due to its high strength, high corrosion and high wear resistance [23][24][25]. The main components of blast furnace slag are CaO, MgO, Al 2 O 3 and SiO 2 , which favor diopside formation by adjusting the CaO/SiO 2 ratio in the glass network [26]. The main components of fluorite tailing are SiO 2 and CaF 2 , which have been proven to be effective in crystallization by reducing the viscosity of the crystallizing glass [27,28].…”

Section: Introductionmentioning

confidence: 99%

Recycling of Blast Furnace Slag and Fluorite Tailings into Diopside-Based Glass-Ceramics with Various Nucleating Agents’ Addition

et al. 2021

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Diopside-based glass-ceramics are successfully produced by recycling blast furnace slag and fluorite tailing with the addition of supplementary elements such as TiO2, Fe2O3 and Cr2O3 as nucleation agents, using a conventional melting method. The effects of various nucleating agents on the phase components and structure of the prepared glass-ceramics were evaluated by a differential scanning calorimeter, X-ray diffraction and scanning electron microscope–energy disperse spectrometer methods to determine the optimal dosage of nucleating agents. The results show that, in the preparation of diopside-based glass-ceramics, the suitable percentages of blast furnace and fluorite tailing are 55% and 45%, and the recommended composite nucleating agents consist of 1.5% Cr2O3, 2% TiO2 and 3% Fe2O3. Heat treatment was conducted at a nucleation temperature of 720 °C and a crystallization temperature of 920 °C, and the nucleation and crystallization durations were 1.0 h and 1.5 h, respectively. Under the abovementioned parameters, the obtained diopside-based glass-ceramics displayed a Vickers hardness of 7.12 GPa, density of 2.95 g·cm−3, water absorption of 0.02%, acid resistance of 0.23% and alkali resistance of 0.02%.

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Section: Introductionmentioning

confidence: 99%

Recycling of Blast Furnace Slag and Fluorite Tailings into Diopside-Based Glass-Ceramics with Various Nucleating Agents’ Addition

et al. 2021

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“…Gui et al prepared glass ceramics derived from molten BF slag, and investigated the effects of CaO/SiO 2 on the microstructure of glass ceramics. 10 Due to the fact that the content of CaO in blast furnace slag is always higher than other oxides, these studies related to CaO/SiO 2 provided valuable suggestions for improving the utilization efficiency of blast furnace slag. [10][11][12] In our previous study, the mechanism of crystallization, structure and properties of BF slag glass ceramics with different CaO/SiO 2 or Na/Al were also revealed.…”

Section: Introductionmentioning

confidence: 99%

“…10 Due to the fact that the content of CaO in blast furnace slag is always higher than other oxides, these studies related to CaO/SiO 2 provided valuable suggestions for improving the utilization efficiency of blast furnace slag. [10][11][12] In our previous study, the mechanism of crystallization, structure and properties of BF slag glass ceramics with different CaO/SiO 2 or Na/Al were also revealed. 13,14 Research works that focused on the optimum heat treatment schedule, nucleation agent, and physical properties of glass ceramics have revealed some critical information about slag glass ceramics, and provided theoretical instruction for future studies on BF slag glass ceramics.…”

Section: Introductionmentioning

confidence: 99%

Structure, viscosity, and crystallization of glass melt from molten blast furnace slag

Zhang

Xiao

et al. 2020

Int J of Appl Glass Sci

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Molten blast furnace slag (BF slag) was modified using liquid‐liquid mixing method for glass ceramics preparation, and the structure and viscosity of glass melt after modification were investigated. The BF slag proportion increased from 52.72 wt. % to 67.05 wt. %, and CaO/(SiO2 + Al2O3) also varied from 0.33 to 0.47. The structure of BF slag melt after modification was investigated using 29Si and 27Al MAS NMR spectra. With increasing CaO/(SiO2 + Al2O3), the amount of Q1 remarkably increased while that of Q2 decreased significantly. Specifically, when CaO/(SiO2 + Al2O3) was more than 0.38, Q3 disappeared in glass melt. The viscosity of glass melt with CaO/(SiO2 + Al2O3) of 0.47 exhibited a steep change at 1169°C, which was mainly caused by the sufficient crystallization of gehlenite confirmed by DTA cooling analysis, XRD, and FE‐SEM‐EDS analysis.

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Crystallization behaviors and properties of Ti-bearing blast furnace slag-based glass ceramics with varying CaO/SiO2 mass ratio

Feng

Lai

et al. 2022

J Aust Ceram Soc

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EFFECT OF CaO/SiO₂ AND HEAT TREATMENT ON THE MICROSTRUCTURE OF GLASS-CERAMICS FROM BLAST FURNACE SLAG

Abstract: Glass-ceramics, with molten blast furnace (BF) slag as the major raw material

Cited by 8 publications

References 7 publications

Recycling of Blast Furnace Slag and Fluorite Tailings into Diopside-Based Glass-Ceramics with Various Nucleating Agents’ Addition

Recycling of Blast Furnace Slag and Fluorite Tailings into Diopside-Based Glass-Ceramics with Various Nucleating Agents’ Addition

Structure, viscosity, and crystallization of glass melt from molten blast furnace slag

Crystallization behaviors and properties of Ti-bearing blast furnace slag-based glass ceramics with varying CaO/SiO2 mass ratio

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