METHOD OF DIGESTING METAL CONTAINING MATERIAL AT ELEVATED TEMPERATURE IN THE PRESENCE OF SULPHUR OXIDE COMPOUND SOURCE SUCH AS H2S04

摘要

According to the present invention there is provided a method of digesting metal containing material comprising the steps of providing the metal containing material; and reacting the metal containing material with a source of at least one sulphur oxide compound at a furnace temperature above 340 DEG C to form at least one metal containing sulphate. The reaction product of said method may also be leached with a suitable solvent to separate certain metal values from other material in a metal containing compound.