Efficiency of additives of the polysaccharide type on physical properties of bentonite mixtures

• Autorzy: Beňo J. , Jelínek P. , Špirutová N. , Mikšovský F.
• Języki publikacji: EN

Abstrakty

EN

The addition of polysaccharide additives generally aims at improving some important physical properties of bentonite mixtures, above all the stability of moulds against the water loss and prevention of surface defects of castings. Polysaccharide products of inland and foreign production were checked in mixtures of two bentonites of the Czech provenance with the same montmorillonite content. The attention was paid in particular to the abrasion resistance of mixtures during storing them under constant climatic conditions. Conclusions have shown the substantial influence of: the amount of the added additive, the kind and structural composition of the additive (pH of the water extract, electric conductance).

Słowa kluczowe

EN

product development; green sand system; dextrin; additives

PL

rozwój produktu; piasek odlewniczy; dekstryna

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 1
• Strony: 5--8
• Opis fizyczny: Bibliogr. 18 poz., rys., tab., wykr.,

Twórcy

autor

Beňo J.

autor

Jelínek P.

autor

Špirutová N.

autor

Mikšovský F.

• Department of Foundry, Technical University Ostrava, Tr. 17. listopadu, 708 33 Ostrava - Poruba, Czech Republic,

Bibliografia

• [1] Neudert, A. Trends of green sand systems Slévárenství, 2006, Vol. 54, No. 10/11, pp. 10 - 11(in Czech).
• [2] Jelínek, P. Pojivové soustavy slévárenských formovacích směsí. 2004, Ostrava (in Czech).
• [3] Gilson, D. M. et. al. Sand Additives - Past, Present and Future, AFS Transactions, 95-39, pp. 295 - 303.
• [4] Chang, Y, The flowability of bentonite bonded green molding sand. J Mat Proces Tech, 2001, 113, pp. 238-244.
• [5] Brümmer, G. Die Vorteile von Einheitsgemischen aus Bentonit, Glanzkohlenstoffbildner und anderen Zusätzen. Slévárenství, 2000, Vol. 48, No. 2/3, pp. 102 - 109 (in Czech).
• [6] Zhou, X. et. al. The high temperature resistant mechanism of a-starch composite binder for foundry. J. Mat. Proc. Tech., 2009, 209,pp. 5394-5398.
• [7] Zhou, X. et. al. Adheisve bonding and Self-Curing Characteristics of a-Starch based composite binder for green sand mould/Core. J Mat Sci Tech, 2004, Vol. 20, pp. 617-621.
• [8] Zhou, X. et. al. Study on synthesis and properites of modified starch binder for foundry, Journal of Materials Processing Technology, 2007, 183, pp. 407-411.
• [9] Yu, W. et. al. Preparation and experiments for a novel kind of foundry core binder made from modified potato starch. Materials and Design, 2009, 30, pp. 210-213.
• [10] Makino, H. et. al. Molding simulation and experiments of new coremaking system with polysacharide-based binder. AFS Transaction, 2005, paper 05-039(04), pp. 1-8.
• [11] Effler, L. et.al. Slévárenství, 1964, Vol 12, pp. 481-483 (in Czech).
• [12] Fosum, J., Vácha, L. Slévárenství, 1984, Vol. 32, No. 7, pp. 267-269 (in Czech).
• [13] Brümmer, G. Organische Leime als sinnvolle ergänzung zum Formstoffbinder Bentonit, Giesserei, 2000, No. 3, pp. 62 - 68.
• [14] Kodíček, M. Biochemické pojmy - výkladový slovník. 1. VŠCHT Praha, 2004, 171 s. (in Czech).
• [15] Vodrážka, Zdeněk. Biochemie. 2. Praha : Academia, 2002. 191 s. (in Czech).
• [16] White, D. R. et. al. Dextrin characterization by high-performance anion-exchange chromatography-pulsed amperometric detection and size-exclusion chromatography-multi-angle light scattering-refractive index detection. Journal of Chromatography A, 2003, 997, pp. 79 -85.
• [17] Ciesielski, W, Tomasik, P. Thermal properties of complexes of amaranthus starch with selected metal salts. Thermochimca Acta, 2003, 403, pp. 161-171.
• [18] Valdivieso, A. L. et. al. Dextrin as a non-toxic depressant for pyrite in flotation with xanthates as collector. Minerals engineering, 2004, Vol. 17, pp. 1001-1006.
• [19] Holtzer, M. et.al. Methods pf the montmorillonite content determination in foundry bentonites. AFE, 2009, Vol. 9, No. 4, pp. 69-72.