Identification and Quantification of Gases Releasing From Furan No Bake Binder

Acharya, Shailee G.; Vadher, Jeetendra A.; Kanjariya, P. V.

doi:10.1515/afe-2016-0039

Cited by 11 publications

(12 citation statements)

References 1 publication

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“…Currently, the binders based on furfuryl resins constitute the largest group (approx. 55%) of binders used in no-bake moulding sands hardened without heating [Chate et al 2017;Acharya et al 2016].…”

Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

Preliminary Tests of Innovative Eco-Friendly Furfuryl Resins and Foundry Sand Mixtures Based on These Resins

Kamińska¹,

Puzio²,

Angrecki³

et al. 2019

J. Ecol. Eng.

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The foundry industry in Poland and EU member states is growing steadily. The alloys based on ferrous metals (cast steel and cast iron) largely contribute to this upward trend. Currently, foundries are facing the problem of increasing requirements, which enforce the production of castings characterized by high dimensional accuracy and surface smoothness with parallel elimination of casting defects. Castings are mostly made in moulding sand mixtures, which are also subject to more and more stringent requirements to meet the above-mentioned casting acceptance conditions. Additionally, moulding sands should ensure adequate mould stiffness to avoid the risk of dimensional deformations during the pouring of liquid metal to this mould and casting solidification. For these reasons, the production of this type of castings has been dominated by loose self-hardening sands with furfuryl resin, commonly called furan sands. In the group of self-hardening sands with synthetic resins, loose self-hardening sands with furfuryl resin enjoy the greatest popularity. What accounts for this fact is the high level of the reclamability of these sands, the possibility of obtaining castings with high dimensional accuracy, the ability to make intricate moulds and cores, the binding process taking place at ambient temperature, and low content of binder. Unfortunately, this technology also has some disadvantages, which include short lifetime of the sand mixture, harmful gases emitted from the sand, and currently also high cost of the sand mixture. The anticipated tightening of the environmental protection regulations in the EU countries, including limiting the content of free furfuryl alcohol in resins (<25% by mass) and reducing the emission of furfuryl alcohol, formaldehyde and BTEX compounds at workplaces, necessitated the development of a new generation of furfuryl resins friendly to the environment. The article compares the results of testing the strength properties of foundry moulding sands using two types of resins, i.e. the resin of a new generation synthesized by Grupa Azoty JRCh and a commercial resin used in the foundry industry. Additionally, derivatographic studies of the above mentioned sand mixtures were conducted, and the loss on ignition and the amount of gases emitted by the sand mixture were determined. Melting was also carried out to study the impact of the resin used on the surface quality of iron castings.

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Section: Journal Of Ecological Engineeringmentioning

confidence: 99%

Preliminary Tests of Innovative Eco-Friendly Furfuryl Resins and Foundry Sand Mixtures Based on These Resins

Kamińska¹,

Puzio²,

Angrecki³

et al. 2019

J. Ecol. Eng.

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“…Much of the molding process is carried out by hand, which provides an opportunity to shape the gating system closely to the theoretically ideal model. For such single heavy castings, failure is unthinkably costly, so that any additional help to ensure success is always welcome (Ref [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Optimized Gating System for Steel Castings

Dojka

Jezierski

Campbell

2018

J. of Materi Eng and Perform

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Computer modeling using a commercially available software package was used to explore the optimization of filling systems based on the relatively new concepts of avoiding entrainment of air bubbles and oxides by avoiding surface turbulence. The test casting was based on a pattern for a traditional top poured test bar, whose cross section was a tri-lobed clover-like shape. The study illustrates clearly that the detailed design of the filling system has a major influence on the conditions for defect generation during filling. Traditional steel casting systems using the widely popular assembly of preformed refractory tubes were found to behave poorly. Systems were demonstrated which were capable of delivering highly controlled filling behavior. The latest systems to be developed employed (1) a naturally pressurized filling system and (2) the use of filters placed flush on the top of the runner to act as bubble diverters, together with (3) terminal spin traps. These novel filling systems demonstrated excellent performance in simulation, in agreement with practical experience of the capability (of the trident gate in particular) to produce, for the first time in the history of casting, defect-free castings on a routine basis.

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“…Measurement methodology was developed based on literature review and own research [34][35][36][37][38][39][40].…”

Section: Research Results and Their Analysismentioning

confidence: 99%

“…Their effect among others, is thermal destruction of the binder, which causes the emission of gases [1][2][3][4][5][6][7][8][9][10][11][12]. The composition of this gases and its harmfulness depends on many factors, mainly on the binder type (resin, hardener), molding sand composition (amount of binder, reclaim participation), contact time with high temperature to knocking out casting from mold [13,14].…”

Section: Introductionmentioning

confidence: 99%

TG/DTG/DTA, FTIR and GC/MS Studies of Oil Sand for Artistic and Precision Foundry with the Emission of Gases Assessment

Bobrowski

Żymankowska-Kumon

Drożyński

et al. 2017

Archives of Foundry Engineering

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The paper presents the results of thermoanalytical studies by TG/DTG/DTA, FTIR and GC/MS for the oil sand used in art and precision foundry. On the basis of course of DTG and DTA curves the characteristic temperature points for thermal effects accompanying the thermal decomposition reactions were determined. This results were linked with structural changes occurred in sample. It has been shown that the highest weight loss of the sample at temperatures of about 320°C is associated with destruction of C-H bonds (FTIR). In addition, a large volume of gases and high amounts of compounds from the BTEX group are generated when liquid metal interacts with oil sand. The results show, that compared to other molding sands used in foundry, this material is characterized by the highest gaseous emissions and the highest harmfulness, because benzene emissions per kilogram of oil sand are more than 7 times higher than molding sand with furan and phenolic binders and green sand with bentonite and lustrous carbon carrier.

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Identification and Quantification of Gases Releasing From Furan No Bake Binder

Cited by 11 publications

References 1 publication

Preliminary Tests of Innovative Eco-Friendly Furfuryl Resins and Foundry Sand Mixtures Based on These Resins

Preliminary Tests of Innovative Eco-Friendly Furfuryl Resins and Foundry Sand Mixtures Based on These Resins

Optimized Gating System for Steel Castings

TG/DTG/DTA, FTIR and GC/MS Studies of Oil Sand for Artistic and Precision Foundry with the Emission of Gases Assessment

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