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镍在目前是我国生产较少,而需要较迫切的金属之一,因此铜电解工厂回收镍盐的问题,对於有色金属工业来讲,具有非常重大的意义。回收镍盐的方法有结晶法和直火回收法两种。镍一般是做为整个溶液净化过程中的副产品而回收的,由於镍在电解液中相对的溶解度较大,用结晶法回收镍盐的最大提取率仅为57％,提取镍盐不够徹底;同时由於蒸汽加热的效率不高,生产上需要较多的浓缩设备和冷却结晶设备。根据上述缺点,我们回收镍盐时,就由最初的结晶法,改为直火法。根据初步试验结果,证明使用直火法,不仅解决了溶液中过多杂质的问题,使电铜品位提高(当然还
Nickel is currently one of the more urgent metals in our country to produce less, so the problem of recovering nickel salts at the copper electrolysis plant is of great significance to the non-ferrous metals industry. Recycling of nickel salts are the crystallization method and direct fire recovery method two. Nickel is generally recovered as a by-product of the entire solution purification process. Since the relative solubility of nickel in the electrolyte is relatively high, the maximum recovery rate of nickel salts recovered by crystallization is only 57%, and the extraction of nickel salts is not complete. At the same time, As the efficiency of steam heating is not high, the production needs more concentrated equipment and cooling crystallization equipment. According to the above shortcomings, when we recover the nickel salt, we change from the initial crystallization method to the direct flame method. According to the preliminary test results, it is proved that using the direct fire method not only solves the problem of excessive impurities in the solution but also improves the grade of the electro-copper (of course