波利顿公司隆斯卡尔冶炼厂于四十年代中叶开始从铅精矿中生产铅,在头十年中,铅精矿先在多膛炉内焙烧,焙砂在功率5,000千伏安的电炉中熔炼。每天平均产铅量为70吨。为提高能力和改善环保条件,在四十年代中期兴建了一个烧结车间。电炉功率提高到6000千伏安,铅日产量提高到125吨。 The Polynesian Longscar Smelter began producing lead from lead concentrates in the mid-1940s. During the first decade, lead concentrate was roasted in a multi-hearth furnace with calcined 5,000 kilovolt-amperes In smelting. The average daily lead production is 70 tons. A sintering plant was built in the mid-1940s to enhance capacity and improve environmental conditions. Electric furnace power increased to 6,000 KVA, lead daily production increased to 125 tons.