The Formation of Gaseous Atmosphere in a Molten Cast Iron/MouldingSand Contact System

• Autorzy: Mocek J.

Identyfikatory

DOI

10.2478/afe-2014-0019

• Języki publikacji: EN

Abstrakty

EN

Drops of molten cast iron were placed on moulding sand substrates. The composition of the forming gaseous atmosphere was examined. It was found that as a result of the cast iron contact with water vapour released from the sand, a significant amount of hydrogen was evolved. In all the examined moulding sands, including sands without carbon, a large amount of CO was formed. The source of carbon monoxide was carbon present in cast iron. In the case of bentonite moulding sand with sea coal and sand bonded with furan resin, in the composition of the gases, the trace amounts of hydrocarbons, i.e. benzene, toluene, styrene and naphthalene (BTX), appeared. As the formed studies indicate much higher content of BTX at lower temperature it was concluded that the hydrocarbons are unstable in contact with molten iron.

Słowa kluczowe

EN

moulding sand; cast iron melt; gas in metal; mould atmosphere

PL

masa formierska; żeliwo

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 1
• Strony: 79--84
• Opis fizyczny: Bibliogr. 14 poz., fot., tab., wykr.

Twórcy

autor

Mocek J.

• AGH University of Science and Technology, Faculty of Foundry Engineering, Reymonta23, 30-059 Kraków, Poland

Bibliografia

• [1] Holtzer, M. & Bobrowski, A. (2010). Assesement of harmfulness of green sand with addition of dust from dry dedusting. Archives of Foundry Engineering. 10(3), 193-198.
• [2] Thiel, G., Giese, S. R., Lossaco, V., Darlington, J.& van Leirsbury, (2005). Effect of using lignite as a seacoal replacement of mold gas emission. AFS Transaction. 113, 471-484.
• [3] Schifo, J. F., Crandell, G., Sheya, S. & LaFay V. S. (2008). Carbon monoxide and carbon dioxide emission variability in metalcasting, pouring, cooling and shake-out operations. Trans. AFS. 116. 908-916.
• [4] Schifo, J. F., Radia, J., Crandell, G. & Mosher G. (2003). Iron foundry hazardous air pollution. What we know and what we don’t. Trans. AFS. 114, 1173-1189.
• [5] LaFay, V. S., Crandell, G. R. & Głowacki, C. R. (2005). Significant reduction in the emission characteristics of the green sand process. Trans. AFS. 113, 997-1006.
• [6] Campbel, J. (2004). Castings, second edition. Elsevier Butterworth Heinemann.
• [7] Taulbee, D. N., LaFay V., Dempsey, T. & Neltner, S. (1997). A method to measure benzene produchon during pyrolysis. results from testing of carbonaceous additives in foundry sands. Division of Fuel Chemistry, American Chemical Society. Preprints of Papers- American Chemical Society Division Fuel Chemistry. 42(1), 354-358.
• [8] Kubecki, M., Holtzer, M., Bobrowski, A., Dańko, R., Grabowska, B. & Żymankowska-Kumon, S. (2012). Analysis of the Compounds from the BTEX Group, Emitted During Thermal Decomposition of Alkyd Resin. Archives of Foundry Engineering. 12(3), 69-74.
• [9] Kubecki, M., Holtzer, M., Grabowska, B. & Bobrowski, A. (2011). Development of method for identification of compounds emitted during thermal degradation of binders used in foundry. Archives of Foundry Engineering. 11(3), 125-130.
• [10] Chojecki, A., Sobczak, N., Mocek, J., Nowak, R. & Siewiorek, A. (2013). Gas evolution from heatedbentonite bonded moulding sand. International Journal of Cast Metals Research. 26(1), 58-63. ISSN 1364-0461.
• [11] Siewiorek, A., Nowak, R., Chojecki, A. & Mocek, J. (2011). Gas evolution rate from heated moulding sands bonded with organic binders. Archives of Foundry Engineering. 11(1), 87-92. ISSN 1897-3310.
• [12] Chojecki, A. & Mocek, J. (2011). Gas pressure in sand mould poured with cast iron. Archives of Foundry Engineering. 11(1), 9-14. ISSN 1897-3310.
• [13] Mocek, J. & Chojecki, A. (2012). Studies of gas atmosphere near the metal-mould interface during casting and solidification of ductile iron. Archives of Foundry Engineering. 12(4), 166-170. ISSN 1897-3310.
• [14] Chojecki, A. & Mocek, J. (2009). Thermochemical study of the gas atmosphere in sand mould. Archives of Foundry Engineering. 9, 135-140.