Method for recovering rare metal from rare metal-containing glass

摘要

A method for collecting minor metals from minor metal-containing glass, characterized in that the method comprises heating the minor metal-containing glass to a temperature of 900-1100°C and thereby melting the minor metal-containing glass, in a closed system, in the presence of 30-500 parts by mass of a glass fluxing agent per 100 parts by mass of silicon dioxide contained in the minor metal-containing glass and 30-200 parts by mass of a heavy-metal oxide per 100 parts by mass of silicon dioxide contained in the minor metal-containing glass, cooling the resultant melt of the minor metal-containing glass to a temperature of 600-800°C while putting carbon monoxide gas into contact with the melt, and keeping the melt at said temperature so that minor metal-containing deposits settle out, and collecting the minor metal-containing deposits.