<報文>黒鉱精鉱と鉛, 亜鉛を含む銅マットの減圧処理について

概要

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In order to recover lead and zinc from Black Ore concentrate, an attempt has been made under high temperatures and reduced pressures with the addition of calcium oxide and carbon. Recoveries of crude lead and zinc were both more than 96%, though the recovery of zinc was not so high as in the case of lead. Since the copper content of residue was lowered by the addition of reductant, the residue should be separated into matte and slag parts by melting with SiO_2,Na_2O and FeO. In this case, the most of copper could be concentrated into matte and recovered by copper smelting. By the treatments of synthetic and commercial copper mattes under temperatures of 1000〜1200℃ and reduced pressures of 0.1〜10 mmHg, lead and zinc sulfides could be effectively eliminated by volatilization and the volatilized matters were recovered in the form of sulfides.
東北大学の論文
1972-03-25