Assessment of sand reclamation techniques and sand quality in thermal reclamation

Rayjadhav, Suyog B.; Mhamane, Digvijay A.; Shinde, Vasudev D.

doi:10.1504/ijpqm.2020.108354

Cited by 9 publications

(9 citation statements)

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“…This method has the advantage of only affecting the sand grains (resin and clay included) and not the surrounding equipment. Most importantly, greenhouse gas emission are eliminated [4].…”

Section: Figure 12: Fine Particle Generation In Thermal and Mechanica...mentioning

confidence: 99%

“…Electricity-powered thermal reclaimers have certain distinct advantages over gas-fired systems. The units do not require a lot of air to support combustion and, because no fuel is used in the reclaimer, there is no risk of contamination of the sand with combustion products [4].…”

Section: Figure 12: Fine Particle Generation In Thermal and Mechanica...mentioning

confidence: 99%

“…At very low temperatures, the envelope of sand binder covering the sand grains becomes brittle, reducing the strength of the binding agent, thus making the reclamation process easier. Figure 3 illustrates the workings of this reclamation technique [4].…”

Section: Introductionmentioning

confidence: 99%

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Sustainability Assessment of Thermal and Mechanical Reclamation of Foundry Chromite Sand

Nyembwe

Kabasele

2022

SAJIE

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After usage, foundry chromite sand is recycled to reduce production costs and comply with environmental regulations. Thermal and mechanical reclamation are the most prominent methods of sand recycling. The sand reclamation techniques used in the foundry sector are typically not evaluated through the green alternative or environmental sustainability concept’s lenses. When contrasting mechanical and thermal reclamation, operational costs are the main factor to be taken into account. Therefore, this study compares mechanical and thermal reclamation of chromite sand by replicating the industrial processes in simulated laboratory tests. The methodology is designed to quantify the production of fine particles during reclamation, which has an array of negative effects on the environment, human health, the economy, and society. The findings show that, in general, mechanical reclamation produced more fine particles than thermal reclamation. The disparity in terms of fine percentage between the two processes could occasionally be as high as 15%. Therefore, mechanical reclamation was a less effective procedure than thermal reclamation when considering environmental sustainability, especially the impact on human health, which goes against conventional wisdom in the foundry sector. Keywords sand recycling; chromite sand; environmental sustainability; green process

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“…This method has the advantage of only affecting the sand grains (resin and clay included) and not the surrounding equipment. Most importantly, greenhouse gas emission are eliminated [4].…”

Section: Figure 12: Fine Particle Generation In Thermal and Mechanica...mentioning

confidence: 99%

Section: Figure 12: Fine Particle Generation In Thermal and Mechanica...mentioning

confidence: 99%

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Sustainability Assessment of Thermal and Mechanical Reclamation of Foundry Chromite Sand

Nyembwe

Kabasele

2022

SAJIE

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“…The mechanical reclamation of used grain matrix was addressed in [ 32 , 33 , 34 ]. Issues that are related to thermal reclamation (the thermal destruction of organic binders on the grain matrix) are presented in [ 35 , 36 , 37 , 38 , 39 , 40 , 41 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Reclamation of Spent Moulding Sand on Chromite Sand Matrix; Removal of Alkali-Phenolic Binder

et al. 2023

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The foundry industry generates large amounts of waste when casting metal into sand moulds. An important issue is the activities that are related to the re-recovery of the grain matrix (the main component of the moulding sand) for realising subsequent technological cycles. This process is particularly important in the case of the expensive chromite matrix that is necessary for use in manganese steel casting. The effects of the reclamation treatments of spent alkali-phenolic binder sand were evaluated by scanning electron microscopy with EDS, analysing the chemical composition in micro areas and proving the loss of binder on the surfaces of the matrix grains. Tests were also performed using the main criteria for evaluating a reclaimed organic binder: sieve analysis and ignition loss. A thermogravimetric analysis study was performed to assess the change in the chromite character of the grain matrix under the influence of temperature. The effects of the reclamation measures were verified by making moulding compounds on a matrix of reclaimed sand and a mixture of reclaimed and fresh sand. The tests and analyses that were carried out indicated the direction of an effective method for reclaiming used alkali-phenolic binder masses and the extent of the proportion of the regenerate in moulding sand in order to maintain the relevant technological parameters of the moulding sand.

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“…it is assumed that the thermal regeneration process has effectively cleaned the grain matrix of the binder if the roasting losses are below 0.1% [5]. Thermal regeneration issues, thermal degradation, or destruction of organic binders on the grain matrix are presented in [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Influence of the Amount of Resin in the Spent Furfuryl Mass on the Thermal Regeneration Process

Łucarz,

Brzezińsk

2023

Archives of Metallurgy and Materials

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Influence of the Amount of ResIn In the spent fuRfuRyl mAss on the theRmAl RegeneRAtIon pRocessThe aim of the study was to determine the influence of the amount of a commonly used binder in foundry work, furfuryl resin -on the course of the thermal regeneration of used moulding sand. The thermal regeneration procedure was carried out at a temperature of 525°c, the required temperature determined according to a specific procedure, and a lower and less effective temperature of 400°c. On the basis of the ignition losses, the influence of the regeneration temperature on the effects of the procedures carried out was compared. it was found that 400°c was too low to effectively clean the binder matrix, but that the more resin in the spent sand, the more intense the cleaning effect. When the required regeneration temperature for furfuryl resin of 523°c was used, higher binder degradation kinetics were observed due to the additional energy supplied to the process from the combustion of a large amount of organic material in the moulding sand.

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Assessment of sand reclamation techniques and sand quality in thermal reclamation

Cited by 9 publications

References 0 publications

Sustainability Assessment of Thermal and Mechanical Reclamation of Foundry Chromite Sand

Sustainability Assessment of Thermal and Mechanical Reclamation of Foundry Chromite Sand

Mechanical Reclamation of Spent Moulding Sand on Chromite Sand Matrix; Removal of Alkali-Phenolic Binder

Influence of the Amount of Resin in the Spent Furfuryl Mass on the Thermal Regeneration Process

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