Gas Evolution of GEOPOL® W Sand Mixture and Comparison with Organic Binders

• Autorzy: Vykoukal M. , Burian A. , Přerovská M. , Bajer T. , Beňo J.

Identyfikatory

DOI

10.24425/afe.2019.127115

• Języki publikacji: EN

Abstrakty

EN

The article deals with the gas development of the geopolymer binder system hardened by heat and provides the comparison with organic binder systems. The GEOPOL® W technology is completely inorganic binder system, based on water. This fact allow that the gas generated during pouring is based on water vapour only. No dangerous emissions, fumes or unpleasant odours are developed. The calculated amount of water vapour generated from GEOPOL® W sand mixture is 1.9 cm3/g. The measured volume of gas for GEOPOL® W is 4.3 cm3/g. The measurement of gas evolution proves that the inorganic binder system GEOPOL® W generates very low volume of gas (water vapour) in comparison with PUR cold box amine and Croning. The amount of gas is several times lower than PUR cold box amine (3.7x) and Croning (4.2x). The experiment results are consistent with the literature sources. The difference between the calculated and the measured gas volume is justified by the reverse moisture absorption from the air after dehydration during storing and preparing the sand samples. Minimal generated volumes of gas/water vapour brings, mainly as was stated no dangerous emissions, also the following advantages: minimal risk of bubble defects creation, the good castings without defects, reduced costs for exhaust air treatment, no condensates on dies, reduced costs for cleaning.

Słowa kluczowe

EN

geopolymer binder; GEOPOL®; gas evolution; core; gas; environment; safe of environment

PL

spoiwo geopolimerowe; GEOPOL®; bezpieczne środowisko

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2019
• Tom: iss. 2
• Strony: 49--54
• Opis fizyczny: Bibliogr. 17 poz., rys., tab., wykr.

Twórcy

autor

Vykoukal M.

• SAND TEAM, spol. s r.o., Holubice, Czech Republic
• VŠB – Technical University of Ostrava, Faculty of Materials Science and Technology, Ostrava – Poruba, Czech Republic

autor

Burian A.

• SAND TEAM, spol. s r.o., Holubice, Czech Republic

autor

Přerovská M.

• SAND TEAM, spol. s r.o., Holubice, Czech Republic

autor

Bajer T.

• SAND TEAM, spol. s r.o., Holubice, Czech Republic

autor

Beňo J.

• SAND TEAM, spol. s r.o., Holubice, Czech Republic
• VŠB – Technical University of Ostrava, Faculty of Materials Science and Technology, Ostrava – Poruba, Czech Republic

Bibliografia

• [1] Davidovits, J. (2015). Geopolymer Chemistry and Application. (Vols. 4th edition), Saint-Quentin: Institut Géopolymère.
• [2] Gluchovskij, V. (1959). Soil – Silicate Concrete (Gruntosilikáty). Kyjev: State publisher of building and architectural literature. (Russian).
• [3] Vykoukal, M., Burian, A. & Přerovská, M. (2017). Inorganic binder systems in the past, at present and in the future. Slévárenství. Issue no. 11-12, LXV, 361-374. (in Czech).
• [4] Davidovits, J. (2005). The poly(sialate) terminology: a very useful and simple model for the promotion and understanding of green-chemistry. Geopolymer chemistry and sustainable development solutions. Proceedings of the World Congress Geopolymer 2005, 29-30 June and 1 July 2005 (pp. 9-16), ISBN 2-9524820-0-0, Saint-Quentin: Institut Géopolymère.
• [5] Davidovits, J. (2006). The Pyramids: An Enigma Solved (Nové dějiny pyramid). Olomouc: Fontána. (in Czech).
• [6] Barbosa, V.F., MacKenzie, K.J. & Thaumaturgo, C. (2000). Synthesis and characterisation of materials based on inorganic polymers of alumina and silica: sodium polysialate polymers. International Journal of Inorganic Materials. 2, 309-317. DOI: 10.1016/S1466-6049(00)00041-6.
• [7] Rowles, M., Hanna, J., Pike, K., Smith, M. & O’Connor, B. (2007). 29Si, 27Al, 1H and 23Na MAS NMR study of the bonding character in aluminosilicate inorganic polymers. Applied Magnetic Resonance. 32, 663-689. DOI: 10.1007/s00723-007-0043-y.
• [8] Vykoukal, M., Burian, A., Přerovská, M. & Kubeš, P. (2016). Cores hardened by heat – operational experiences with trial of binder system GEOPOL® W in the foundry BENEŠ a LÁT, a.s. Slévárenství. Issue no. 7-8, LXIV, 236-239. (in Czech).
• [9] Holtzer, M., Kmita, A. & Dańko, R. (2015). The gases generation during thermal decomposition od moulding sands - comparison of inorganic and organic binders. Slévárenství. 7-8, LXIII, 240-247. (in Czech).
• [10] Internal documentation, research and development results and manufacturing procedures of the company SAND TEAM, spol. s r.o., Holubice. (2019). (in Czech).
• [11] Inorganic binder system GEOPOL®. (2016). Catalouge. SAND TEAM, spol. s r.o. v1/14.10.2016. (in Czech and English).
• [12] INOTEC® New Inorganic Binder for Foundry Serial Production. Nuovo legante inorganico per la produzione di Anime. In Congresso Assofond, 20 October 2012 (29 p.), Vicenza, Italy: Congresso Assofond.
• [13] Steinhäuser, T. (2006). AWB – an environment friendly core production technology. In World Foundry Congress, 5-7 June 2006 (pp. 422-429), Harrogate, United Kingdom: Casting the future.
• [14] Steinhäuser, T. (2017). Inorganic binders – benefits – state of the art – actual use. In South African Metal Casting Conference, 13-17 March 2017 (26 p.), Johannesburg, South Africa: World Cast in Africa – Innovative for Sustainability.
• [15] Steinhäuser, T. (2006). Environmentally Friendly Procedure of Core Production. Slévárenství. 1, 10-13. (in Czech).
• [16] Löchte, K. & Boehm, R. (2006). Inorganic binders: Properties and experience. In World Foundry Congress, 5-7 June 2006 (pp. 422-429), Harrogate, United Kingdom: Casting the future.
• [17] Löchte, K., Boehm, R., Lubojacký, M. & Ivanov, S. (2009). CORDIS – Organic binder system. Slévárenství. 1-2, LVII, 36-39. (in Czech).

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).