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用反射炉处理铅浮渣时,一般有三种方法:(一)铁屑法;(二)硫化铁或硫化铅法和(三)碳酸钠法。从实际生产中得知:这三种方法都有一定的缺点。前两种方法需要高的反应温度(1300°～1400℃),铅被大量挥发,同时产出的矽酸性炉渣又不允许在低温操作,结果得到含铅高、含铜低的铅冰铜和砷冰铜,铅的回收率是很低的。第三种方法,虽然允许在低温下操作,回收率也较高,但不能适用於各种不同组成的原料。最近,我们根据实际生产的经验,采用了新的方法——Na_2 CO_3～Fo屑法。经过实验室试验和实际生产证明:这一方法不仅允许在低温操作,並且也可以处理任何组成的浮渣,铅的回收率比上述三种方法都高。现将试验过程总结如下,藉供参考。
There are generally three methods for treating lead scum with a reverberatory furnace: (1) iron scrap method; (2) iron sulfide or lead sulfide method and (3) sodium carbonate method. From the actual production that: these three methods have certain shortcomings. The first two methods require a high reaction temperature (1300 ° to 1400 ° C), lead is largely volatilized, and the silicate slag produced is not allowed to operate at low temperatures, resulting in a lead-matte containing copper with a high lead content and a low copper content Arsenic matte, lead recovery rate is very low. The third method, while allowing low temperature operation, also has a high recovery rate, but can not be applied to a wide variety of raw materials of different compositions. Recently, we have adopted a new method based on the experience of actual production - the Na_2 CO_3 ~ Fo method. After laboratory tests and actual production proved: This method not only allows operation at low temperatures, but also can handle scum of any composition, lead recovery rate than the above three methods are high. Now the test process is summarized as follows, for reference.