Metallurgy, Vol. 60 No. 3-4, 2021.
Original scientific paper
Kinetics of gas emission from aluminosilicates used as a relaxing additive for moulding and core sands
A. Bobrowski
orcid.org/0000-0003-1964-6154
; AGH University of Science and Technology, Krakow, Poland
D. Drożyński
; AGH University of Science and Technology, Krakow, Poland
K. Kaczmarska
; AGH University of Science and Technology, Krakow, Poland
B. Grabowska
; AGH University of Science and Technology, Krakow, Poland
S. Cukrowicz
; AGH University of Science and Technology, Krakow, Poland
Abstract
The article presents the results of gas emissions generated during heating of mineral additives – aluminosilicates (perlite ore and vermiculite). The test on a laboratory stand for a 1 g sample at 1 000 °C was carried out. It has been shown, that there is a correlation between the degree of fragmentation and the amount of gas generated. The finest fraction of perlite ore caused a similar quantitative gas emission as ground vermiculite. The presence of additives in molding sands, regardless of the size of fraction, should not affect the formation of casting defects. The addition of perlite ore and vermiculite does not effect the ecological properties of moulding sand.
Keywords
perlite ore; vermiculite; heating; gas; emission
Hrčak ID:
255991
URI
Publication date:
1.7.2021.
Visits: 1.023 *