前言从矿石或精矿中回收金属的湿法冶金方法,总的说来常常需要一个费用高昂的液一固分离步骤,作为整个工艺流程的一部份。通常达一步骤包括过滤,在特定的情况下还包括浓缩或逆流倾析。处理高品位矿石和精矿时,这种固液分离作业的基建和生产费用仅为整个工艺费用的很小一部份,这是因为待 Preface The hydrometallurgical method of recovering metals from ores or concentrates generally requires an expensive liquid-solid separation step as a part of the overall process. Often steps up to filtration include, in particular cases, concentrated or countercurrent decantation. The capital and production costs of such solid-liquid separation operations are only a small part of the overall process cost when processing high-grade ores and concentrates, because