Effect of Bentonite Clay Addition on the Thermal and Mechanical Properties of Conventional Moulding Sands

• Autorzy: Kamińska J. , Puzio S. , Angrecki M.

Identyfikatory

DOI

10.24425/afe.2020.131291

• Języki publikacji: EN

Abstrakty

EN

Bentonites and clays are included in the group of drilling fluids materials. The raw materials are mainly clay minerals, which are divided into several groups, like montmorillonite, kaolinite, illite, biotite, muscovite, nontronite, anorthoclase, microcline, sanidine or rutile, differing in chemical composition and crystal lattice structure. Clay minerals have a layered structure forming sheet units. The layers merge into sheets that build up to form the structure of the mineral. The aim of the studies carried out in the ŁUKASIEWICZ Research Network - Foundry Research Institute is to explore the possibility of using minerals coming from Polish deposits. The article outlines the basic properties of hybrid bentonites, which are a mixture of bentonite clay called beidellite, originating from overburden deposits of the Turoszów Mine, and foundry bentonite from one of the Slovak deposits. As part of the physico-chemical tests of minerals, measurements included in the PN-85/H-11003 standard, i.e. montmorillonite content, water content and swelling index, were carried out. Additionally, the loss on ignition and pH chemical reaction were determined. Based on the thermal analysis of raw materials, carried out in the temperature range from 0 to 1000⁰C, changes occurring in these materials during heating, i.e. thermal stability in contact with liquid metal, were determined. Examinations of the sand mixture based on pure clay and bentonite and of the sand mixture based on hybrid bentonites enabled tracing changes in permeability, compressive strength and tensile strength in the transformation zone as well as compactability referred to the clay content in sand mixture. Selected technological and strength parameters of synthetic sands are crucial for the foundry, because they significantly affect the quality of the finished casting. Based on the analysis of the results, the optimal composition of hybrid bentonite was selected.

Słowa kluczowe

EN

bentonite; bentonite clay; moulding sand; montmorillonite; strength properties

PL

bentonit; glinka bentonitowa; piasek formierski; montmorylonit; właściwości wytrzymałościowe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2020
• Tom: Vol. 20, iss. 1
• Strony: 111--116
• Opis fizyczny: Bibliogr. 15 poz., tab., wykr.

Twórcy

autor

Kamińska J.

• ŁUKASIEWICZ Research Network - Foundry Research Institute, Cracow, Poland

autor

Puzio S.

• ŁUKASIEWICZ Research Network - Foundry Research Institute, Cracow, Poland

autor

Angrecki M.

• ŁUKASIEWICZ Research Network - Foundry Research Institute, Cracow, Poland

Bibliografia

• [1] Grabowska, B., Holtzer, M., Kot, I., Kwaśniewska-Królikowska, D. (2011). Spectrophotometry application for the montmorillonite content determination in moulding sands with bentonite. Metallurgy and Foundry Engineering. 37(1), 73-79.
• [2] Beňo, J., Lichý, P., Kroupová, I. & Radovský, F. (2016). Influencing of foundry bentonite mixtures by binder activation. Metalurgija. 55(1), 7-10.
• [3] Lee, T., Benson, C.H. & Eykholt, G.R. (2004). Waste green sands as reactive media for groundwater contaminated with trichloroethylene (TCE). Journal of Hazardous Materials. B109, 25-36. DOI: 10.1016/j.jhazmat.2003.10.007.
• [4] Aramide, F.O., Aribo, S., Folorunso, D.O. (2011). Optimizing the moulding properties of recycled ilaro silica sand. Leonardo Journal of Sciences. 19, 93-102.
• [5] Lewandowski, J.L. (1997). Materials for foundry molds. Kraków: Wydawnictwo Akapit. (in Polish).
• [6] Lewandowski J.L. (2013). Bonding materials and other molding materials. In Sobczak J.J. (Eds.), Poradnik Odlewnika. Tom 1 Materiały (pp. 995-1004). Kraków: Wydawnictwo STOP. (in Polish).
• [7] de Koff, J.P., Lee, B.D., Dungan, R.S. (2008). Amelioration of physical strength in waste foundry green sands for reuse as a soil amendment. Journal of Environmental Quality. 37, 2332-2338. DOI:10.2134/jeq2007.0397.
• [8] Radhakrishna, L. & Gopikrishna, N. (2016). Impact of bentonite coating over silica sand during addition of water. International Journal for Research & Development In Technology. 6(5), 132-135.
• [9] Bast, J. (2013). A new method for the measurement of flowability of green moulding sand. Archives of Metallurgy and Materials. 58(3), 943-952. DOI: 10.2478/amm-2013-0107.
• [10] Brzeziński, D. (2018). Polish mineral resources. Bentonites and bentonite clays. Retrieved April 2018, from http://geoportal.pgi.gov.pl/surowce/skalne/bentonity/2018.
• [11] Burkowicz, A. (2014). Bentonites and related raw materials. In Smakowski T., Neya R., Golasa K. (Eds.), Balance of mineral resources management in Poland and the world 2012. (pp. 119-126). Warszawa: Wydawnictwo Państwowego Instytutu Geologicznego. (in Polish).
• [12] Wyszomirski, P. & Lewicka, E. (2005). Bentonites as a universal raw material for many industries. Gospodarka Surowcami Mineralnymi. 21(3), 5-19. (in Polish).
• [13] Standard PN-85/H-11003: Foundry molding materials. Foundry bentonite.
• [14] Dzwonnik, I. (2000). Derivographic studies of phenomena in mixtures of bentonite and coal dust. Archiwum Technologii Maszyn i Automatyzacji. 20(1), 19-26. (in Polish).
• [15] Paź, S., Drożyński, D., Górny, M. & Cukrowicz, S. (2019). Properties of bentonites and bentonite mixtures used in casting processes. Archives of Foundry Engineering. 19(2), 35-40. DOI: 10.24425/afe.2019.127113.

Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).