Keywords: steam-microwave solidification, steam-microwave environment, sodium silicate solute, gas-generating ability, ultimate strength, crushability


Purpose – to investigate the properties of sand-sodium-silicate mixtures structured in steam-microwave environment (SMS-process).
Methods. In these studies, to compare the properties, rods have been made by CO2 process and by steam-microwave solidification method. Mixtures have been made from 1K3O3016 quartz sand and sodium silicate solute with specific density of 1440 kg/m3 and silicate modulus MSiO2 = 2.93. Obtained samples compressive strength has been determined in accordance to GOST 23409.7-78, samples crushability – in accordance to GOST 23409.9 and gas-generating ability – in accordance to GOST 23409.12-78.
Results. Molds and rods manufactured by the method of steam-microwave solidification (SMS-process) immediately after structuring are suitable for use because they have high strength, practically contain no moisture and, accordingly, practically non-gas-generating, i.e. do not require subsequent drying. SMS method is suitable for making castings from steel, cast iron and non-ferrous alloys due to possibility of casting molds and rods producing from mixtures with SSS content from 0.5 to 1.5 %. In this way it is possible to make rods and molds of any complexity, and their limitations in weight and size will be due only to used microwave (ultrahigh-frequency) radiation chamber load capacity and working space size.
Originality. For the first time the properties of sand-sodium-silicate mixtures, which have been structured in steam-microwave environment (by SMS-process), using 1 ... 3 % (by weight) of dried dispersed sodium silicate solute in quartz sand, and quartz sand cladded with 2...6 % sodium silicate solute and dried to quicksand condition have been discovered.
Practical implications. Structuring by SMS-process can be used for manufacturing of sand-sodium-silicate molds and rods, weighing up to 6 kg, in single, small and small-scale castings production from ferrous and non-ferrous alloys


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How to Cite
Solonenko , L., Repyah , S., & Uzlov , K. (2021). MOLD AND ROD MIXTURES STRUCTURING BY STEAM-MICROWAVE SOLIDIFICATION METHOD. Metallurgical and Ore Mining Industry, (2), 23-31.