Acid gas emissions from structural clay products containing secondary resources: foundry sand dust and Waelz slag

Coronado, María José; Andrés, A.; Cheeseman, Christopher

doi:10.1016/j.jclepro.2015.11.083

Cited by 18 publications

(13 citation statements)

References 25 publications

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“…The maximum mass loss rate of foundry sand for cast iron was −0.153 wt% min −1 , and the corresponding peak temperature was 533 K. The mass loss of foundry sand for cast iron in this thermal decomposition stage contributed about 39 wt% to the total mass loss. In a previous study, foundry sand dust entered an endothermic state after about 473 K in an air atmosphere [26]. This was mainly due to the combustion or oxidation reaction of impurities in the foundry sand dust.…”

Section: Resultsmentioning

confidence: 99%

“…Wang et al investigated the copyrolysis behaviour of Pingshuo coal using a thermogravimetric analyser to find that the addition of biomass facilitates pyrolysis and combustion of the coal [20]. Coronado et al investigated the thermal characteristics of foundry sand dust to find that higher temperature and lower firing rate yield higher acid gas emissions [26]. There has been no study to date on the thermal decomposition behaviours of foundry sand for cast iron; the present study was conducted in an effort to fill this gap.…”

Section: Introductionmentioning

confidence: 96%

“…Coronado et al . investigated the thermal characteristics of foundry sand dust to find that higher temperature and lower firing rate yield higher acid gas emissions [26]. There has been no study to date on the thermal decomposition behaviours of foundry sand for cast iron; the present study was conducted in an effort to fill this gap.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Thermal decomposition characteristics of foundry sand for cast iron in nitrogen atmosphere

Yao

et al. 2018

R. Soc. open sci.

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Sand casting, currently the most popular approach to the casting production, has wide adaptability and low cost. The thermal decomposition characteristics of foundry sand for cast iron were determined for the first time in this study. Thermogravimetry was monitored by simultaneous thermal analyser to find that there was no obvious oxidation or combustion reaction in the foundry sand; the thermal decomposition degree increased as the heating rate increased. There was an obvious endothermic peak at about 846 K due to the transition of quartz from β to α phase. A novel technique was established to calculate the starting temperature of volatile emission in determining the volatile release parameter of foundry sand for cast iron. Foundry sand does not readily evaporate because its volatile content is only about 2.68 wt% and its main components have high-temperature stability. The thermal decomposition kinetics parameters of foundry sand, namely activation energy and pre-exponential factor, were obtained under kinetics theory. The activation energy of foundry sand for cast iron was small, mainly due to the wide temperature range of thermal decomposition in the foundry sand.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Thermal decomposition characteristics of foundry sand for cast iron in nitrogen atmosphere

Yao

et al. 2018

R. Soc. open sci.

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“…Waste additions and processing conditions effect on the physico-chemical, technological and environmental properties of the final product have been extensively studied using classical multivariate statistical techniques [19][20][21][22][23][24][25][26][27]. Otherwise, Artificial Neural Networks (ANN) and Self-Organizing Maps (SOMs) have thus far been used in a more limited way as an alternative to assess the abovementioned relationships.…”

Section: Introductionmentioning

confidence: 99%

Self-Organizing Maps to Assess the Recycling of Waste in Ceramic Construction Materials

et al. 2021

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Circular economy promotes the use of waste materials into new production processes as a key factor for resource efficiency. The construction sector, and specifically the fired clay industry, is able to assimilate large amounts of waste in their processes, without significantly altering the technical properties of products. The introduction of different waste in ceramic products at the laboratory level has been extensively studied in the literature, but most of these studies have not yet been scaled-up to industrial production. Differences in processing with respect to laboratory conditions introduces uncertainty in relation to the expected properties of the final products. This paper uses a Self-Organizing Map (SOM)-based methodology for analysing and assessing the incorporation of industrial waste, Waelz slag (WS) and foundry sand dust (FSD), in ceramic products obtained sequentially at laboratory, semi-industrial and industrial level, over technological properties and metals release. As a result, from the SOM analysis, a clustered map of the samples developed is obtained that highlights the most important parameters affecting the technological and environmental properties to be the type of clay and therefore, the firing temperature; secondly, the Waelz slag content, being independent of the foundry sand addition; and finally, the type and level of processing (laboratory-pressing, semi-industrial extruder, industrial extruder).

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“…In addition, dynamic heat and vapor transport in a typical three-dimensional (3D) building structure, involving different types of environment-friendly concrete mixtures, had been simulated by using finite elements [22]. Coronado studied the thermal behaviour of foundry sand dust and monitored the acid gas emissions [23]; however, no previous researcher has investigated the thermal decomposition characteristics of foundry sand for cast steel. We hope to fill this gap.…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition Behaviour of Foundry Sand for Cast Steel in Nitrogen and Air Atmospheres

Chen

Zhang

et al. 2020

Mathematical Problems in Engineering

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Sand casting is the most widely used casting technique, known for ages, even since ancient times. The main goal of this study was to determine the thermal decomposition behaviour of foundry sand for cast steel. We first tested the basic properties of foundry sand, including its proximate analysis, chemical composition, and particle size characteristics; we next monitored the thermal decomposition behaviour of foundry sand for cast steel via simultaneous thermal analysis. We focused on the mass loss of foundry sand for cast steel at different heating rates in nitrogen and air atmospheres. We adopted a novel method to calculate the volatile release characteristic index of foundry sand. The volatile content of foundry sand for cast steel was very low, so the volatile release characteristic index of the sand could not be strictly calculated according to this concept. We calculated the thermal decomposition kinetics parameters of foundry sand, namely, the activation energy and preexponential factor, under kinetics theory. To thoroughly test the fitting effect, we conducted a single-factor analysis of variance on the source of error. The results showed that the independent variable has a significant influence on the dependent variable and that the fitting equation we selected is feasible and effective.

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Acid gas emissions from structural clay products containing secondary resources: foundry sand dust and Waelz slag

Cited by 18 publications

References 25 publications

Thermal decomposition characteristics of foundry sand for cast iron in nitrogen atmosphere

Thermal decomposition characteristics of foundry sand for cast iron in nitrogen atmosphere

Self-Organizing Maps to Assess the Recycling of Waste in Ceramic Construction Materials

Thermal Decomposition Behaviour of Foundry Sand for Cast Steel in Nitrogen and Air Atmospheres

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