Thermal Reclamation of Foundry Sands Using Repurposed Sand Dryer Equipment

• Autorzy: Sappinen T. , Orkas J. , Kronqvist T.

Identyfikatory

DOI

10.24425/afe.2018.125176

• Języki publikacji: EN

Abstrakty

EN

One of the biggest problems for sand casting foundries must be the waste produced from disposable molds. Stricter environmental regulations make it harder to dispose of waste sand, so a truly competitive foundry does no longer only make great products, but also concentrates on a sustainable casting process. While methods for repurposing waste foundry sand are still limited, the internal circulation of such sands proves significant possibilities. This paper will focus on thermal reclamation of foundry sands in a special rotating drum furnace in a central facility to serve several foundries. Thermal reclamation is a process for handling foundry sands in elevated temperatures to combust unwanted substances from reusable base sand. The introduction focuses on background of the Finnish foundry business, the most common sand systems in Finland and their reclaim properties. The experimental part features presentation of the new reclamation plant process and the conducted test runs. The samples collected from each test run have been laboratory tested to assure proper sand quality. The results of this work showed that the reclamation of alkaline phenolic no-bake sands was excellent. Reclamation of green sands did not provide satisfactory results as expected and the reclamation of furan no-bake sands provided mixed results, as the raw material was imperfect to begin with. The most important result of this work is still the successful initiation of a centralized thermal reclamation plant, with the ability to reclaim sands of several foundries. With this all of industrial symbiosis, circular economy and sustainability advanced in Finland, and the future development of this plant provides even further opportunities and a possibility to spread the ideas on a global scale.

Słowa kluczowe

EN

environment protection; innovative foundry technology; spent foundry sand; thermal reclamation; industrial symbiosis

PL

ochrona środowiska; innowacyjna technologia odlewnicza; zużyta masa formierska; regeneracja termiczna; symbioza przemysłowa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 4
• Strony: 99--102
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Sappinen T.

• Aalto University, Otakaari 4, 02150 Espoo, Finland

autor

Orkas J.

• Aalto University, Otakaari 4, 02150 Espoo, Finland

autor

Kronqvist T.

• Timexcon Oy, Seppäsentie 8, 90450 Kempele, Finland

Bibliografia

• [1] Lucarz, M. (2015). Thermal reclamation of the used moulding sands. Metalurgija. 54(1), 109-112.
• [2] Lucarz, 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.
• [3] Dańko, J., Holtzer, M. & Dańko, R. (2010). Criteria of an advanced assessment of the reclamation process products. Archives of Foundry Engineering. 10(3), 25-28.
• [4] Granlund, M. & Silsby, D.V. (2008). Thermal-pneumatic reclamation of molding sands for reuse in core work. Transactions of the American Foundry Society. 116, 309-328.
• [5] Carey, P.R. & Lott, M. (1995). Sand binder systems part V – Furan no-bake. Foundry management & technology. 103(7), 26-30.
• [6] Busby, A.D. (2015). Patent nr. 0246386 A1. US. Reclamation of ester-cured phenolic resin bonded foundry sands.
• [7] American Foundry Society. (2015). Mold & Core test handbook. Schaumburg, IL: American Foundry Society.
• [8] Verein Deutscher Giessereifachleute. (1992). VDG - Merkblatt R 93. Regenerierte Sande als Formgrundstoff. Anforderungen, Beurteilungskriterien. Düsseldorf: VDG.

Uwagi

PL

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