Foam glass derived from ferrochrome slag and waste container glass: Synthesis and extensive characterizations

Kurtuluş, Cansu; Kurtuluş, Recep; Kavas, Taner

doi:10.1016/j.ceramint.2021.05.228

Cited by 33 publications

(16 citation statements)

References 26 publications

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“…Although pure chemicals were used in this work, these findings may guide or be referred to for future related foam glass manufacturing using recycling glass wastes. For instance, with X-ray fluorescence analyses [ 8 , 24 , 25 ], we can roughly determine whether a glass waste mixture has a stochiometric ratio close to the preferred ratio of pure chemical raw mixtures. Furthermore, systematic approaches for preparing low-cost and high-performance foam glass materials remain scarce, owing to the lack of a fundamental understanding of the structure–property–process relationships at the molecular level, despite decades of efforts.…”

Section: Discussionmentioning

confidence: 99%

“…As compared with conventional condensed hard materials [ 1 , 2 ], the properties of foam glass material include an excellent combination of high mechanical strength [ 3 ], low bulk density [ 4 ], as well as chemical [ 4 ] and thermal [ 5 ] stability by virtue of a number of pores inside the foam glass material, which lead to significant applications in building materials [ 5 , 6 ], thermal storage [ 5 ], and corrosion resistance [ 3 ]. Sheet glass cullet [ 7 ], waste glass [ 8 ], cathode-ray-tube panel [ 9 ], and coal fly ash [ 7 , 10 ] can be recycled to manufacture foam glass materials. The effects of a number of chemical additions, such as chromic oxide, cobaltous oxide, antimonous oxide, manganese dioxide, lead oxide, and antimony trioxide, have been studied to improve the physical and mechanical properties of foam glass materials [ 6 , 11 , 12 , 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

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The Impact of Foaming Effect on the Physical and Mechanical Properties of Foam Glasses with Molecular-Level Insights

Zhai

Zhu

et al. 2022

Molecules

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Foaming effect strongly impacts the physical and mechanical properties of foam glass materials, but an understanding of its mechanism especially at the molecular level is still limited. In this study, the foaming effects of dextrin, a mixture of dextrin and carbon, and different carbon allotropes are investigated with respect to surface morphology as well as physical and mechanical properties, in which 1 wt.% carbon black is identified as an optimal choice for a well-balanced material property. More importantly, the different foaming effects are elucidated by all-atomistic molecular dynamics simulations with molecular-level insights into the structure–property relationships. The results show that smaller pores and more uniform pore structure benefit the mechanical properties of the foam glass samples. The foam glass samples show excellent chemical and thermal stability with 1 wt.% carbon as the foaming agent. Furthermore, the foaming effects of CaSO4 and Na2HPO4 are investigated, which both create more uniform pore structures. This work may inspire more systematic approaches to control foaming effect for customized engineering needs by establishing molecular-level structure–property–process relationships, thereby, leading to efficient production of foam glass materials with desired foaming effects.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Impact of Foaming Effect on the Physical and Mechanical Properties of Foam Glasses with Molecular-Level Insights

Zhai

Zhu

et al. 2022

Molecules

View full text Add to dashboard Cite

show abstract

“…(2) applications in the construction of roads and buildings [3] and as aggregates in concrete [4]; and (3) applications in the treatment of hazardous hexavalent Cr [5], for example, in the removal of hexavalent Cr from jigging water streams. TS is discharged from tundish after the continuous casting of steel.…”

Section: Introductionmentioning

confidence: 99%

Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag

et al. 2022

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Ferrochrome slag (FS) and tundish slag (TS) are two typical slags containing high contents of Cr2O3 (3.88 wt.%) and MnO (18.69 wt.%), respectively. In this study, batches of ceramics were prepared from FS and TS, and their Cr/Mn leaching behaviors, mechanical properties and microstructures were investigated. Results showed that ceramics with 80 wt.% FS or 85 wt.% TS had acceptable properties. By controlling its composition and sintering temperature, pyroxene or spinel phases could become the main crystalline phases of the fired ceramics containing either of the two slags. For both slag series, pyroxene phases contributed to higher bending strengths, whereas spinel phases led to lower Cr/Mn leaching rates. Both ceramic containing 20 wt.% FS and ceramic containing 85 wt.% TS had the main crystals of pyroxene phases and possessed the highest bending strengths (FS20: 114.52 MPa and TS85: 124.61 MPa). However, both ceramic containing 80 wt.% FS and ceramic containing 25 wt.% TS with main crystals from the spinel phases had the lowest Cr/Mn leaching rates (FS80: Cr 0.05% and TS25: Mn 0.43%). Therefore, optimum designs for the compositions of ceramics from different slags were achieved by changing the proportions of pyroxene and spinel phases to obtain a balance between the high strengths of materials and the stable retention of heavy metal ions. This study provides an important basis for long-term research on the large-scale reuse of heavy metal-containing slags in the ceramic industry.

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“…Another type of porous silicate glasses are materials based on liquid glass [21]. Liquid glass is an aqueous solution of alkaline silicates characterized by chemical activity, controlled density, astringent properties, and high sensitivity to thermal effects [22]. When heated to 120-500 • C, liquid glass is capable of forming solid foam with a density of 50-150 kg/m 3 .…”

Section: Introductionmentioning

confidence: 99%

“…Liquid glass is a multifunctional component of the raw mixture: at the stage of molding it facilitates binding of the powder mass; during heat treatment, it reduces the softening temperature of the molten glass and ensures the formation of porosity. During the chemical interaction of liquid glass and glass powder, silicates are formed containing bound water, which serves as a source of the gas phase for foaming the glass mass [22].…”

Section: Introductionmentioning

confidence: 99%

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

2021

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The article is devoted to the development of resource-saving technology of porous granular materials for energy-efficient construction. The relevance of the work for international research is to emphasize expanding the raw material base of porous lightweight concrete aggregates at the expense of technogenic and substandard materials. The work aims to study the processes of porization of glass crystalline granules from polymineral raw materials mixtures. The novelty of the work lies in the establishment of regularities of thermal foaming of glass crystalline granules when using waste of magnetic separation of skarn-magnetite (WMS) ores and lignite clay. Studies of liquid glass mixtures with various mineral fillers revealed the possibility of the formation of a porous structure with the participation of opoka, WMS and lignite clay. This is due to the presence in the materials of substances that exhibit thermal activity with the release of a gas phase. The foaming efficiency of the investigated materials increases when combined with glass breakage. The addition of WMS and lignite clay to the glass mixture increases the pore size in comparison with foam glass. The influence of the composition of raw mixtures on the molding and stability of granules is determined. The addition of sodium carbonate helps to strengthen the raw granules and reduce the softening temperature of the mass. The composition of the molding mixture of glass breakage, liquid glass and a multicomponent additive is developed, which provides an improvement in the molding properties of the glass mass, foaming of granules at a temperature of 750 °C. Foam glass crystalline granules have polymodal porosity, characterized by a density of 330–350 kg/m3, a compressive strength of 3.2–3.7 MPa, and a thermal conductivity of 0.057–0.061 W/(m·°C). Accordingly, the developed granules have a high potential use in structural and heat-insulating concretes.

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Foam glass derived from ferrochrome slag and waste container glass: Synthesis and extensive characterizations

Cited by 33 publications

References 26 publications

The Impact of Foaming Effect on the Physical and Mechanical Properties of Foam Glasses with Molecular-Level Insights

The Impact of Foaming Effect on the Physical and Mechanical Properties of Foam Glasses with Molecular-Level Insights

Effect of Phase Composition on Leaching Behavior and Mechanical Properties of Ceramics from Ferrochrome Slag and Tundish Slag

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

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