玻利维亚文托(Vinto)炼锡厂用感应加热蒸馏法从铁砷渣生产粗黑砷(99%)即属此例。
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Empresa Metalurgica Vinto 玻利维亚文托冶金公司
Today, even the mines that have survived are operating at maybe half their potential, and the giant Vinto smelting plant at a third.
ECONOMIST: Bolivia
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