前言采矿工业存在的许多问题,需要选矿不断地发展。由于当前对环境问题的关注,使得矿石采掘、加工、都受极为严格的限制,因此必须发展减少污染的工艺方法。目前选矿产品的价格,相对地保持不变,而矿石的品位趋于下降,建设费用也有所增高,因此也需要提高金属回收率,改善最终产品的质量,同时也要降低生产费用。某些超越熔炼炉和鼓风炉而消除污染的新方法,已经用于从矿石中回收金属。其中某些方法在经济上是有吸引力的。从烟气中回收二氧化硫的结果,将能生产大量的硫 Preface Many of the problems that exist in the mining industry require the continuous development of beneficiation. Due to the current concern about environmental issues, making the mining of ore, processing, are subject to very strict restrictions, it is necessary to develop pollution reduction process. At present, the price of beneficiation products remains relatively unchanged while the grade of ore tends to decline and the construction cost also increases. Therefore, it is also necessary to increase the metal recovery, improve the quality of the final product and at the same time reduce the production cost. Some new methods of eliminating pollution beyond smelting furnaces and blast furnaces have been used to recover metals from ores. Some of these methods are economically attractive. As a result of the recovery of sulfur dioxide from the flue gas, a large amount of sulfur will be produced