PRODUCTION OF MINERAL FIBRES

摘要

Man made vitreous fibres are made by a process comprising forming moulded briquettes of particulate mineral material that includes contaminated foundry sand, forming a melt by melting in a furnace a charge comprising the briquettes and forming fibres from the melt, and the melt and the fibres have a content, measured as oxides, that includes Al2O3 in an amount of not more than 4 % by weight.