共查询到18条相似文献,搜索用时 62 毫秒
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为了适应饰品加工市场对高光亮镀铑添加剂国产替代进口的需要,在传统镀铑液配方及工艺的基础上,依据电化学原理,设计了全光亮镀铑添加剂的配方组合及工艺流程,并通过正交试验法对所获镀层的表观进行了评定,初步获得了一种新型全光亮镀铑添加剂.阐述了镀铑添加剂的作用机理,探索了最佳工艺用量.结果表明,采用本添加剂所得工艺配方简单,成本适中,操作方便,无毒无害,便于维护.在一定温度和电流密度条件下,所得镀铑层平整光亮,酷似白金,可作为仿白金装饰性镀层的理想工艺. 相似文献
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失效催化剂已成为贵金属循环再生的重要原料。介绍了从废催化剂中回收贵金属的主要方法,包括载体分离、活性成分分离和整体处理法,根据其优缺点比较,阐述了工业化应用发展方向。 相似文献
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云南某铜尾矿主要金属矿物有黄铜矿、黄铁矿、磁黄铁矿等,黄铜矿以原生硫化铜为主,金以裸露金和黄铜矿包裹金为主。为综合回收其中有价铜、金,进行了选矿试验。试样在磨矿细度为-200目占85%的情况下采用两次粗选、第二次粗选后扫选、两次精选、第二次精选后扫选、混精矿再磨至-325目占85%、粗选后扫选精矿再磨至-325目占85%、中矿循序返回流程处理。最终获得铜品位15.51%、回收率68.34%、产率1.41%的铜金精矿,其中的金品位19.93 g/t、回收率54.04%,银品位231.72 g/t、回收率41.89%。 相似文献
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阐述了银的冶炼工艺流程及铜在银冶炼过程中的分布情况,分析了铜在各阶段的行为,提出了控制铜含量的措施,并介绍了银冶炼过程中钯的综合回收工艺。 相似文献
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Aimed at high content of valuable metals, complicated composition, difficult to separation of precious metals six component alloy wastes, the present paper proposed a new technology of high efficient separation and purification. Using fragmentation technology realizes fast dissolution of palladium, silver, copper and zinc in the wastes, and high efficient and complete separation of them from gold and platinum; using evaporation thermal decomposition technology of mixed solution produced by nitric acid dissolving palladium, silver, copper and zinc, complete and high efficient separation of silver from palladium was realized; by control of solution acidity, using hydrazine reduction method, high efficient and complete separation of gold from platinum was realized. Using this new technology, the recovery rates of palladium and silver are above 99%, and gold and platinum above 98%, the grade of pure metals are above 99.95%. 相似文献
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The recovery of precious metals from the secondary resources by microwave technology has emerged in recent years. Microwave technology as a new method for the recovery of precious metals has shown significant advantages against the conventional recovery procedures. This paper presents a review of the advances in microwave technology applied to the recovery of precious metals from the secondary resources. Many different applications are considered, including microwave-assisted leaching, microwave augmented ashing and microwave pyrolysis. In general, microwave enhanced recovery of precious metals from secondary resources. 相似文献
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