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戴维脱银法在小型试验之后。于1976～1977年应用于思瓦耶尔—戈达尔特(N-G)铅精炼厂。该法是在一口锅内分两段进行操作,利用水冷钢盘冷却铅液表面,并在控制速度下进行搅拌,使二段渣壳在锅中形成硬盖,从而彻底消除捞二段渣壳和随后冷却降温阶段清理锅帮粘结渣的体力劳动。新方法的主要优点是减少劳动力,除此之外,吊运量、锌的消耗,总的作业时间和锅的维护费用都有所减少;由于清除了返渣,精炼车间变得比较干净;最终产品含银也有所降低,燃料消耗可能稍有增加。并且需要两台额外的设备——冷却盘和能调速的搅拌机。在N—G精炼厂已经用这个方法精炼了50多万吨铅。该法已有美国专利进行介绍,并在其它国家得到应用。
David off silver method after a small test. In 1976 ~ 1977 applied to the Sivaier - Godault (N-G) lead refinery. The method is divided into two sections in a pot operation, the use of water-cooled steel cooling liquid lead surface, and stirring speed control, so that the second paragraph of the skull in the pot to form a hard cover, which completely eliminate the second fishing skull And then cool the cooling stage to help clean the pot to help cement the manual labor. The main advantage of the new method is the reduction of the workforce, in addition to which the handling capacity, the consumption of zinc, the total work time and the pot maintenance costs are reduced; the refinery becomes cleaner due to the removal of the slag return; Product silver is also reduced, fuel consumption may increase slightly. And two additional units are needed - the cooling plate and the speed-adjustable mixer. More than 500,000 tons of lead have been refined by this method at the N-G refinery. The law has been introduced in the United States patent, and in other countries have been applied.