GAS CAPACITY OF SAND-LIQUID GLASS FORMING ROD MIXTURES
Processy litʹâ, 2021, Tom 145, №3 p. 44-52
DOI:
https://doi.org/10.15407/plit2021.03.044Keywords:
water, sand, liquid glass, mixture, gas content, microwave radiation, steam-microwave environmentAbstract
Received 14.06.2021
UDK 621.74
The paper presents the results of determining the gas content of quartz sand clad with sodium water glass and structured in a steam-microwave environment, depending on the mass of water glass used for cladding, the method of drying the clad sand, and the conditions for its processing in a steam-microwave environment. Gas content was determined by calculation based on the results of experimental determination by weighing the water content in structured mixtures. It was found that with an increase in the mass of liquid glass used for cladding quartz sand, the gas content of such a structured mixture increases. The gas content of the mixture decreases with an increase in the duration of drying the clad sand with microwave radiation and with an increase in the structuring time in a steam-microwave environment. For the manufacture of sand-liquid glass molds and rods by the structuring method in a steam-microwave environment with a gas content of not more than 5.0 cm3 / g, it is recommended to use quartz sand clad with less than 2% liquid glass (by weight), which, after drying in air to constant weight, should be treated with microwave radiation for 5 minutes and structured in an appropriate model-rod equipment with microwave radiation for at least 5 minutes.
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