State of Spent Molding Sands in the Mold Large-Size Cast

• Autorzy: Łucarz M.
• Języki publikacji: EN

Abstrakty

EN

The results of investigations of spent moulding sands taken from the mould at various distances from the surface of the produced casting, are presented in the paper. The casting mould was made with an application of the cooling system of the metal core in order to increase the cooling rate of the ladle casting. As temperature measurements in the mould indicated the heat flow from the metal did not create conditions for the complete burning of a moulding sand. The analysis was performed to find out changes of spent moulding sands caused by degradation and destruction processes of organic binders. Conditions occurring in the casting mould were discussed on the bases of testing: ignition losses, dusts contents, pH reactions and the surface morphology of the moulding sand samples. Factors limiting the effective mould degassing were pointed out. Operations, possible for realisation, which can limit the reasons of a periodical occurrence of increased amounts of casting defects due to changing gas evolution rates being the result of the technological process, were also indicated.

Słowa kluczowe

EN

spent moulding sand; organic binder; thermal destruction; ignition loss; mechanical reclamation; thermal reclamation

PL

masa formierska; spoiwo organiczne; deformacja cieplna; strata prażenia; regeneracja mechaniczna; regeneracja termiczna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2016
• Tom: Vol. 16, iss. 4
• Strony: 69--74
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Łucarz M.

• AGH University of Science and Technology, Faculty of Foundry Engineering, 30-059 Krakow, 23 Reymonta Str., Poland

Bibliografia

• [1] Holtzer, M., Dańko, R., Kmita, A., Żymankowska-Kumon, S., Kubecki, M., Skrzyński, M. (2015). Influence of the addition of the reclaimed sand on the quality of castings and harmfulness of the new generation core and moulding. Kraków: Wydawnictwo Naukowe AKAPIT. (in Polish).
• [2] Łucarz. M. (2016). Analysis of spent moulding sands with binders of various thermal degradations, in an aspect of a apossibility of a directional mould degassing. Archives of Foundry Engineering. 16(2), 21-26.
• [3] Łucarz, M. (2014). The effect of mechanical and thermal reclamation on the matrix of quartz grain state. Kraków: Polska metalurgia w latach 2011–2014: monografia Komitet Metalurgii Polskiej Akademii Nauk, Wydawnictwo Naukowe AKAPIT. (in Polish).
• [4] www.imfbr.com.br/site/Catalogos/19-Mechanical_ Reclamation-PT-ENG-ESP.pdf.
• [5] Dańko, J., Dańko, R., Łucarz, M. (2007). Processes and devices for the reclamation of spent moulding sands. Kraków: Wydawnictwo Naukowe AKAPIT. (in Polish).
• [6] Dańko, R. (2012). Strength model of self-setting moulding sands with synthetic resins In an aspect of the integrated matrix recycling process. Katowice-Gliwice: Archives of Foundry Engineering. (in Polish).
• [7] Łucarz, M., Grabowska, B. & Grabowski, G. (2014). Determination of parameters of the moulding sand reclamation process, on the thermal analysis bases. Archives of Metallurgy and Materials. 59(3), 1023-1027.
• [8] Łucarz, M. (2015). Setting temperature for thermal reclamation of used moulding sands on the basis of thermal analysis. Metalurgija. 54(2), 319-322.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.