Characterization and thermal behavior of granite waste during heating

Qiu, Boxin; Wang, Fen; Luo, Hongjie; Holé, Clément; Zhu, Jianfeng; Ren, Zhao; Sciau, Philippe

doi:10.1016/j.ceramint.2023.02.066

Cited by 3 publications

(5 citation statements)

References 27 publications

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“…20 The quartz, kaolinite, and illite minerals are responsible for the red firing behavior as they promote vitrification and hematite crystallization at elevated temperatures around 950°C. 21 The SEM micrographs revealing particle morphology of the studied clay are shown in Figure 2. The images indicate loosely held plate-like pseudohexagonal particles characteristic of kaolinite.…”

Section: Resultsmentioning

confidence: 99%

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Characterization and properties of Chinese red clay for use as ceramic and construction materials

Gu,

Ling

2024

Science Progress

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This study involves the characterization and analysis of a Chinese red clay obtained from Hunan province to determine its suitability for manufacturing ceramic products. X-ray fluorescence analysis showed the clay has high silica (63.25 weight percent) and alumina (21.38 weight percent) content along with iron oxide, alkalis, and calcium acting as fluxes. X-ray diffraction (XRD) confirmed the presence of quartz, kaolinite, illite, and hematite as the major mineralogical phases. Scanning electron microscopy revealed loosely stacked, plate-shaped kaolinite particles exhibiting pseudohexagonal morphology. Particle size distribution shows a d50 of 12.7 μm and specific surface area is 21.3 m2/g. Differential thermal analysis-thermogravimetric analysis showed mass losses between 450–600°C and 950–1050°C corresponding to dehydroxylation and formation of a liquid phase, respectively. Dilatometry traced the onset of viscous flow sintering around 1000°C. Test bars produced from the clay were fired at 800°C, 900°C, 950°C, 1000°C, and 1050°C. The firing shrinkage increased from 2.5% at 800°C to 12.8% at 1050°C. Strength improved from 11.2 megapascals at 800°C to 42.3 megapascals at 1050°C due to densification and mullite formation. Hematite content caused the color to change from orange-red at 950°C to dark red at 1050°C. XRD analysis of fired specimens confirmed the presence of hematite and newly formed mullite and cristobalite phases. The results indicate the suitability of the clay for manufacturing bricks, roof tiles, and wall tiles using appropriate firing temperatures and cycles.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Characterization and properties of Chinese red clay for use as ceramic and construction materials

Gu,

Ling

2024

Science Progress

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“…The main components include SiO 2 , Al 2 O 3 , CaO, Na 2 O, and K 2 O, which are closely related to feldspar minerals. Owing to the high Fe 2 O 3 content in the granite powder, the disproportionation reaction of Fe 2 O 3 occurs spontaneously at elevated temperatures, causing the self‐foaming of sintered glass‐ceramics 20 . Besides, the colored minerals containing iron and titanium render the black‐colored appearance of sintered glass‐ceramics, which destroys its decorativeness.…”

Section: Resultsmentioning

confidence: 99%

“…Owing to the high Fe 2 O 3 content in the granite powder, the disproportionation reaction of Fe 2 O 3 occurs spontaneously at elevated temperatures, causing the selffoaming of sintered glass-ceramics. 20 Besides, the colored minerals containing iron and titanium render the blackcolored appearance of sintered glass-ceramics, which destroys its decorativeness. Thus, they should be removed from the granite powder for practical utilizations.…”

Section: Characterization Of the Granite Powdermentioning

confidence: 99%

Recycling of granite sludge for the preparation of high‐strength glazed glass‐ceramics using stepwise sintering

Lu,

Liu,

Zhou

2024

Int J Applied Ceramic Tech

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The reutilization of granite sludge generated in granite cutting and processing possesses economic and ecological benefits. In this study, high‐strength glazed glass‐ceramics were prepared entirely from granite powder using dense sintering and instantaneous glaze firing. The densification and glaze formation are clarified in terms of phase evolution to study their effects on the flexural strength and surface glossiness of the glass‐ceramics. The milling process promotes particle refinement and the removal of colored minerals, thus increasing the powder whiteness and sinterability. After dense sintering at 1100°C, instantaneous glaze firing at high temperatures decreases the flexural strength while greatly increases the surface glossiness of the glass‐ceramics due to the dissolution of quartz and feldspars in the liquid phase. After the acid‐leached powder was densely sintered and fired with a rapid heating of 50°C/min to 1300°C, the pinhole‐free glazed glass‐ceramic has a flexural strength of 112.5 MPa and a surface glossiness of 54.7 GU (glossiness unit), meeting the quality requirements of the bright glazed tiles in the market. The stepwise sintering process provides a simple processing route for recycling granite sludge into decorative construction tiles and high‐temperature glazes, promising the scalable and value‐added utilization of granite sludge.

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“…The crystals obtained at 1120℃ are densely distributed, and the crystal forms are relatively complete but very small. This is because at 1120℃, the nucleation rate of crystals is greater than the crystal growth rate [8], and crystal growth is slow due to low temperature and large viscosity of glaze melt. With the increase of the holding temperature, the individual crystals gradually become larger and grow in clusters, and there is no obvious vitreous body on the enamel surface, but when the temperature reaches 1180℃, the individual crystals are larger and intact, but the entire glaze layer crystals become dispersed and sparse.…”

Section: Effect Of Crystallization Temperature On Quality and Crystal...mentioning

confidence: 99%

Study on the Preparation of Crystalline Glaze from Granite Waste

Zhao

2024

J. Phys.: Conf. Ser.

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In this paper, the common gabbro granite (black) waste in the stone market is used as the main raw material to successfully prepare ceramic crystalline glaze. The best preparation process of crystalline glaze is: the ratio of material, ball and water is 1:2:0.8, the grinding time is 24h, that is, D97=34.68 μm, and the glaze layer thickness is 1.2 mm-1.68 mm, and good quality glaze can be obtained. According to XRD, differential thermal analysis and theoretical calculation of granite, the best sintering system for the glaze with granite as the main raw material is formulated as follows: the sintering temperature is 1220°C-1300°C, the crystallization holding temperature is 1140°C-1160°C, and the holding time is 1h-2h.

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Characterization and thermal behavior of granite waste during heating

Cited by 3 publications

References 27 publications

Characterization and properties of Chinese red clay for use as ceramic and construction materials

Characterization and properties of Chinese red clay for use as ceramic and construction materials

Recycling of granite sludge for the preparation of high‐strength glazed glass‐ceramics using stepwise sintering

Study on the Preparation of Crystalline Glaze from Granite Waste

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