| 1. | Gold is still a valuable metal but is often found in the mountain streams
金子仍然是一种贵重金属，但是常常能在山里的溪流中找到。 |
| 2. | Copper occurs in nature mixed with other minerals and valuable metals in ore , and the proportion of copper in the ore can vary considerably
铜在自然中与其他矿物和有价值的金属混合存在于矿石中，而且矿石中铜的比例可能有很大差别。 |
| 3. | But there is good news to the looming metals crisis . we could treat landfills as though they were mines ? and dig up the valuable metals buried in them
虽然金属短缺危机不断逼近，但还是有好消息。我们可以视垃圾掩埋场为矿脉，并开采埋藏其中的贵重金属。 |
| 4. | Whether the fluid of coarse liquid zinc is steady or not is one of the most important factors that effect the life of distillation column and the output and quality of product meanwhile , it also much affects the recovery rate of valuable metals
粗锌液流量稳定与否，是影响精馏塔寿命以及锌产品产量和质量的最重要因素之一；同时，它对有价金属的回收率也将产生很大的影响。 |
| 5. | This paper analyzed the mechanism of precipitation floatation , discussed the technology of selective precipitation floatation , the method of sulfide precipitation floatation can treat wastewater containing heavy metal ion and reclaim valuable metals
摘要对沉淀浮选机理进行了分析，讨论了选择性沉淀浮选技术，论述了硫化沉淀浮选法不仅能处理矿山含重金属离子废水，同时还能回收其中的有用金属。 |
| 6. | Abstract : in order to comprehensively recover the valuable metals , it ' s necessary to use the method of removal of impurity of sodium sulphide in ammonium molybdate production with high tungsten and low potasium molybdenum concentrate . the process of comprehensive utilization of this slag was related
文摘:使用高钨低钾钼精矿生产合格的钼酸铵时，仍需要采用硫化钠除杂的方式，以达到综合回收有价金属的目的，本文详述了该渣的综合利用过程。 |
