engleski

Monitoring of leaching process in foundry sand and mould mixture-H2O system

Over 90 % of iron alloy castings are made in disposable moulds i.e. in raw synthetic moulds. Raw mould mixture is applied in all production process types. Mould mixture is composed of sand as the basic component, binding material, water and additives. Sand particles take up 70 to 95 % of the total mould material in the mixture. The most frequently used sands include quartz sand, chromite sand and olivine sand. Preliminary study of leaching behaviour in foundry sand and mould mixture-H2O system has been studied through electrical conductivity measurements, complemented by measurements of the leaching concentrations of Cr3+, Al3+, Si4+, Ca2+, Mg2+, Fe3 and pH value in eluates after the leaching process.

foundry sand; mould mixture; leaching

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