| 摘要 |
<p>Antimony values are separated from a material containing a sulfo-antimony compound of copper, e.g. tetrahedrite ore concentrate, by a process involving establishing a pool of molten lead, adding a metallic alkali metal, adding the tetrahedrite ore concentrate to the molten lead, and mixing together the alkali metal, molten lead, and tetrahedrite ore concentrate. The alkali metal and sulfo-antimony compound of copper are reacted together in the presence of the molten lead for a period which is sufficient to reduce the antimony of the sulfo-antimonyd compound of copper to metallic antimony and to form one or more sulfo-alkali metal compounds of copper, and a matte phase which separates from the molten lead. The reduced, metallic antimony passes into the molten lead pool, and the sulfo-alkali metal compound or compounds of copper report in the matte phase on the surface of the molten lead pool. The matte phase is, separated from the molten lead. The metallic antimony is then recovered from the lead.</p><p>The process herein is a relatively low temperature process employing temperatures of the molten lead pool above the melting point of lead but ordinarily not in excess of 650 °C. Further, the instant process does not require a smelting fu nace but is ordinarily carried out in a kettle.</p> |
