Study of Heat Effect on the Composition of Dunes Sand of Ouargla (Algeria) Using XRD and FTIR

Mechri, Mohammed Laïd; Chihi, Smail; Mahdadi, Naouia; Beddiaf, Samiha

doi:10.1007/s12633-015-9368-6

Cited by 19 publications

(8 citation statements)

References 13 publications

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“…The later was around 720 [16] in casting sand waste sand originating from automotive cast. This also conforms the effect of temperature on the crystallographic polymorph structure, appearing within samples heated above 800 0 C as previously stated by Mechri et al (2017) [27]. Lastly, the diffraction pattern decomposition showed the existence of elemental metallic traces associated to the main ingredient of the cast alloy.…”

Section: Discussionsupporting

confidence: 89%

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Nyembwe¹,

Makhatha²,

Mageza³

2017

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Abstract. The metal casting industry discharges huge volumes of waste foundry sand yearly. It was estimated to be 250 thousand tons of spent silica foundry sand for the existing 200 casting facilities in South Africa. Even though, establish documents exist in regards to the foundry sand composition, few well documented theories are available in regards to changes or mutations taking place after casting process. Four waste silica casting sands were qualitatively analyzed for they mineralogical phases composition using the X-ray diffraction (XRD). The investigation was conducted on various waste casting sand alloy including aluminum, cast iron, high chrome and steel. The result revealed a significant compositional difference related to the molding binder and casting temperature. Different silica phase's polymorph, related to the various alloy casting temperature, were observed in waste sand samples. Theses phases included alpha quartz, tridymite, and alpha cristobelite. The molding binder favored the crystalisation of bentonite related mineral such as periclase, microcline and wustite, within the greensand system. The chemically bonded sand exposed the presence of anorthite as the only existing mineralized phase in the resin sand. The mineralogical content of the waste foundry sand provides information on the molding binder used. In addition to that, silica polymorph it informs about the pouring temperature related to the cast alloy.

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Section: Discussionsupporting

confidence: 89%

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Nyembwe¹,

Makhatha²,

Mageza³

2017

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“…It also support the presence of christobalite as earlier identified by Monosi et al (2010) [16] in casting sand waste sand originating from automotive cast. This also conforms the effect of temperature on the crystallographic polymorph structure, appearing within samples heated above 800 0 C as previously stated by Mechri et al (2017) [27]. Lastly, the diffraction pattern decomposition showed the existence of elemental metallic traces associated to the main ingredient of the cast alloy.…”

Section: Discussionsupporting

confidence: 89%

Untitled

2017

View full text Add to dashboard Cite

The metal casting industry discharges huge volumes of waste foundry sand yearly. It was estimated to be 250 thousand tons of spent silica foundry sand for the existing 200 casting facilities in South Africa. Even though, establish documents exist in regards to the foundry sand composition, few well documented theories are available in regards to changes or mutations taking place after casting process. Four waste silica casting sands were qualitatively analyzed for they mineralogical phases composition using the X-ray diffraction (XRD). The investigation was conducted on various waste casting sand alloy including aluminum, cast iron, high chrome and steel. The result revealed a significant compositional difference related to the molding binder and casting temperature. Different silica phase's polymorph, related to the various alloy casting temperature, were observed in waste sand samples. Theses phases included alpha quartz, tridymite, and alpha cristobelite. The molding binder favored the crystalisation of bentonite related mineral such as periclase, microcline and wustite, within the greensand system. The chemically bonded sand exposed the presence of anorthite as the only existing mineralized phase in the resin sand. The mineralogical content of the waste foundry sand provides information on the molding binder used. In addition to that, silica polymorph it informs about the pouring temperature related to the cast alloy.

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“…The peak at 1.66 Å (hkl 211) is attributed to the rutile. From this figure, we concluded also that there are no observed diffractions at 2θ: 11.69°, 23.45°and 29.19°due to gypsum (CaSO 4 •2H 2 O), contrary to Mechri et al [21] results, who found gypsum in their sand sample.…”

Section: Grain Size Distribution Analysis and Specific Gravitycontrasting

confidence: 50%

Chemical and physical analysis of sandstone and relationship with weathering damage of Madâin Sâlih monuments

Medini

Mgaidi

2018

Journal of Taibah University for Science

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The present work aims to study the effect of weathering-produced sands across the area in the weathering damage of sandstones in Madâin Sâlih (Saudi Arabia). Our approach is to investigate some chemical and physical properties of sand samples from the study area. The weathered point in this arid area is Qsar al Bint or Place of the daughter monument in which five different samples have been collected. The analysis of scanning electron microscope images reveals that sand surfaces have different roughness and some surface areas were broken except for the rock samples. According to energy dispersive spectroscopy analysis, the rock samples reveal the presence of Ca, Mg, Na, K, Al and Fe at the surface. Mineralogy study using X-ray diffraction revealed that sandstones are clay-cemented sandstone. Fourier Transform Infrared spectroscopy analysis confirmed that the inorganic binding agent of silica grains is essentially Kaolonite (Al 2 Si 2 O 5 (OH) 4).

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Study of Heat Effect on the Composition of Dunes Sand of Ouargla (Algeria) Using XRD and FTIR

Cited by 19 publications

References 13 publications

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

Waste Foundry sand Mineralogical Characterisation: The Impact of Cast Alloy, Casting Temperature and Molding Additive on the Nature Waste Foundry Sand

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Chemical and physical analysis of sandstone and relationship with weathering damage of Madâin Sâlih monuments

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