Recycling of Waste Moulding Sands with New Binders

Izdebska-Szanda, I.; Angrecki, M.; Palma, A.

doi:10.2478/afe-2013-0034

Cited by 7 publications

(12 citation statements)

References 2 publications

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“…According to the Federal Classification Catalog of Waste 2017, abrasive waste from waterjet cutting of ferrous and non-ferrous metals is virtually unhazardous [12]. The economic use of the waste is the most effective waste elimination method to minimize hazards [12][13][14]. Thus, by adding abrasive waste from waterjet cutting into the sand casting composition, the expenditure on sand casting raw material can be reduced which is economically and efficiently advantageous while still maintaining the casting quality [15].…”

Section: Introductionmentioning

confidence: 99%

Green strength properties of waterjet abrasive waste as potential composition in green mould by Taguchi and ANOVA approach

ANUAR

Khusairi

Saad

et al. 2021

JMES

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The sand casting process still continues today due to the cost-effectiveness of materials and processes. There is a wide variety of castings related to composition and size, but silica sand is widely available from coastal line mining and has a negative impact on the environment. Moreover, waste from waterjet cutting of non-ferrous and ferrous metals is practically unhazardous and may potentially be used in sand casting mould. The aim of this paper is to optimize the proportion of coal dust, water and bentonite added to the silica sand mixture and the waterjet cutting abrasive waste as a new way of handling waste with the potential to be used in sand casting manufacturing. The method used was L9 orthogonal array optimization and the composition was qualitatively measured using a green compression strength test and a green shear strength test. Factors were evaluated using the analysis of variance (ANOVA) to find the the critical factors while confirmation test was conducted for the optimal material proportion. The study concluded that the ideal ratio for silica sand mixture with waterjet abrasive waste is bentonite-12%, coal dust-5%, and water-7% for green compression strength while bentonite-12%, coal dust-6%, water-7% for green shear strength. With proper selection, the incorporation of waterjet abrasive waste into the green sand mixture is promising to potentially be used in green sand mould casting without undermine the quality of mould.

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Section: Introductionmentioning

confidence: 99%

Green strength properties of waterjet abrasive waste as potential composition in green mould by Taguchi and ANOVA approach

ANUAR

Khusairi

Saad

et al. 2021

JMES

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“…In the casting industry a number of moulding sands are used, but for the production of large steel casting components the most frequently applied are the ones based on chromite sand. This sand is characterized by high refractoriness -above 1750°C, high thermal shock resistance, compressive strength and thermal conductivity [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…There are two important sources of chromite sands characterized by lower thermo-mechanical properties. The first ones are reclaimed sands [4][5][6][7]. Despite the fact that the currently used technologies of thermal and mechanical reclamation of moulding sands allow obtaining chromite sand reclaims whose parameters are similar to those of fresh sands, foundries also use reclaimed sands of low thermo-mechanical quality [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The first ones are reclaimed sands [4][5][6][7]. Despite the fact that the currently used technologies of thermal and mechanical reclamation of moulding sands allow obtaining chromite sand reclaims whose parameters are similar to those of fresh sands, foundries also use reclaimed sands of low thermo-mechanical quality [5][6][7][8][9][10]. The second source of chromite sand supplies is raw material after the milling process.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Chromite Sands Suitability for Use in Moulding Sands

Stec

Podwórny

Psiuk

et al. 2017

Archives of Foundry Engineering

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Using the available analytical methods, including the determination of chemical composition using wavelength-dispersive X-ray fluorescent spectroscopy technique and phase composition determined using X-ray diffraction, microstructural observations in a highresolution scanning microscope equipped with an X-ray microanalysis system as well as determination of characteristic softening and sintering temperatures using high-temperature microscope, the properties of particular chromite sands were defined. For the study has been typed reference sand with chemical properties, physical and thermal, treated as standard, and the sands of the regeneration process and the grinding process. Using these kinds of sand in foundries resulted in the occurrence of the phenomenon of the molding mass sintering. Impurities were identified and causes of sintering of a moulding sand based on chromite sand were characterized. Next, research methods enabling a quick evaluation of chromite sand suitability for use in the preparation of moulding sands were selected.

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“…The most often they are either subjected to a mechanical reclamation process or, less often, to a thermal reclamation, or they are used in other industrial sectors. In extreme situations spent moulding sands are transported to damping grounds, which from economical as well as ecological reasons is very wrong [1]. The problem of the spent moulding sands management is specially important for companies producing high-dimensional castings since amounts of used moulding sands are very large.…”

Section: Introductionmentioning

confidence: 99%

Influence of the reclamation method of spent moulding sands on the possibility of creating favourable conditions for gases flow in a mould

Łucarz

Drożyński

2017

Archives of Metallurgy and Materials

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The results of investigations concerning the influence of the applied sand matrix (fresh sand, reclaim) on the properties of moulding sands used for production of large dimensional castings (ingot moulds, ladles), are presented in the hereby paper. The performed investigations were aimed at determining the influence of various reclamation methods of spent moulding sands on the quality of the obtained reclaimed material. Moulding sands were prepared on the fresh quartz matrix as well as on sand matrices obtained after various reclamation methods. The selected moulding sand parameters were tested (strength, permeability, grindability, ignition losses, pH reactions). It can be stated, on the basis of the performed investigations, that the kind of the applied moulding sand matrix is of an essential meaning from the point of view of creating conditions minimising formation of large amounts of gases and their directional migration in a casting mould.

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Recycling of Waste Moulding Sands with New Binders

Cited by 7 publications

References 2 publications

Green strength properties of waterjet abrasive waste as potential composition in green mould by Taguchi and ANOVA approach

Green strength properties of waterjet abrasive waste as potential composition in green mould by Taguchi and ANOVA approach

Determination of Chromite Sands Suitability for Use in Moulding Sands

Influence of the reclamation method of spent moulding sands on the possibility of creating favourable conditions for gases flow in a mould

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