Treatment method of hazardous pickling sludge by reusing as glass–ceramics nucleation agent

Rare Metals ◽  
2015 ◽  
Vol 35 (3) ◽  
pp. 269-274 ◽  
Author(s):  
Jian Yang ◽  
Shen-Gen Zhang ◽  
De-An Pan ◽  
Bo Liu ◽  
Chun-Li Wu ◽  
...  
Keyword(s):  
Glass Ceramics ◽  
Treatment Method ◽  
Nucleation Agent ◽  
Pickling Sludge

scholarly journals Preparation and Properties of Blast Furnace Slag Glass Ceramics Containing Cr2O3

2019 ◽  
Vol 38 (2019) ◽  
pp. 726-732 ◽  
Author(s):  
Yi-ci Wang ◽  
Wen-bin Xin ◽  
Xiao-geng Huo ◽  
Guo-ping Luo ◽  
Fang Zhang
Keyword(s):  
Blast Furnace ◽  
Blast Furnace Slag ◽  
Bending Strength ◽  
Glass Ceramics ◽  
Scientific Basis ◽  
Raw Material ◽  
Nucleation Agent ◽  
Parent Glass ◽  
Factsage Software ◽  
Furnace Slag

AbstractIn this study, the blast furnace slag of the Baotou Steel and Iron Company was used as the main raw material to prepare glass ceramics with diopside as the main crystal phase. The composition of the parent glass was designed by thermodynamic calculations with FactSage software. Small amounts of the nucleation agent Cr2O3 were then added to the parent glass to induce crystallization. Differential thermal analysis was used to determine the nucleation and crystallization temperatures of the glasses, and scanning electron microscopy and X-ray diffraction were adopted to determine the microstructures and phase compositions of the glasses after heat treatment, respectively. The results showed that glass ceramics of the diopside phase can be prepared with up to 73 wt% blast furnace slag when 1.44–1.91 wt% Cr2O3 is added, and the ceramics have uniform compact grains and a high bending strength of about 84.6–101.7 MPa. In addition, the mechanical properties are better than those of natural marble and granite. These results provide basic information and a scientific basis for industrial production of diopside glass ceramics using molten blast furnace slag as the main raw material.

Nucleation and Crystallization of Glass-Ceramics from Coal Fly Ash

2007 ◽  
Vol 280-283 ◽  
pp. 1651-1654 ◽  
Author(s):  
Fei Peng ◽  
Kai Ming Liang ◽  
Hua Shao ◽  
An Min Hu ◽  
Feng Zhou
Keyword(s):  
Activation Energy ◽  
Fly Ash ◽  
Coal Fly Ash ◽  
Glass Ceramics ◽  
Treatment Schedule ◽  
Nucleation Agent ◽  
Optimum Heat ◽  
Heat Treatment Schedule ◽  
Kinetics Of ◽  
Optimum Heat Treatment

The nucleation and crystallization kinetics of glass obtained by melting coal fly ash with additives at 1550°C have been investigated. The optimum heat treatment schedule for the glass was nucleation at 825°C for 60min before crystallization at 962°C for 4h. The activation energy for crystallization of the glass-ceramics, obtained by the DDTA result, was 280.03 kJ/mol, lower than that of glass-ceramics obtained from pure reagents. The low activation energy is caused by impurities in fly ash, serving as nucleation agent. The results of XRD and SEM show that glass-ceramics developed nano-sized spherical wollastonite.

Li2O-Al2O3-SiO2 Glass-Ceramics Used As Anodic Bonding Materials

2008 ◽  
Vol 368-372 ◽  
pp. 1436-1438 ◽  
Author(s):  
Hong Li ◽  
Yun Du ◽  
Jin Shu Cheng ◽  
Tian He Wang
Keyword(s):  
Heat Treatment ◽  
Thermal Expansion ◽  
Coefficient Of Thermal Expansion ◽  
Glass Ceramics ◽  
Treatment Method ◽  
Substrate Material ◽  
Anodic Bonding ◽  
Treatment Schedule ◽  
Crystal Phases ◽  
Step Heat Treatment

The glass-ceramics, whose coefficient of thermal expansion approximately matched to that of silicon, were studied to replace conventional heat-resistant glass as substrate material for anodic bonding. The basic glasses of the Li2O-Al2O3-SiO2 system with TiO2 and ZrO2 as nucleation agents were prepared by melting technology, and the temperatures of nucleation and crystallization were determined. The glass-ceramics were obtained by two-step heat-treatment method. The oriented crystallization of glasses in gradient temperature field was studied. The crystal phases and microstructures of glass- ceramics were analyzed. Effect of heat-treatment schedule on the coefficient of thermal expansion was discussed. The results showed that the most of the main crystal phases of the samples were β-spodumene. The coefficient of thermal expansion of sample was about 32.5×10-7/°C, which was approach to that of silicon.

Study on glass-ceramics made from MSWI fly ash, pickling sludge and waste glass by one-step process

2020 ◽  
Vol 271 ◽  
pp. 122674 ◽  
Author(s):  
Shizhen Zhao ◽  
Bo Liu ◽  
Yunji Ding ◽  
Junjie Zhang ◽  
Quan Wen ◽  
...  
Keyword(s):  
Fly Ash ◽  
Glass Ceramics ◽  
Waste Glass ◽  
Mswi Fly Ash ◽  
Step Process ◽  
Pickling Sludge ◽  
One Step
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