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除鋅一般方法的商榷 1.在作为制造盐类时,原料的处理: (1) 如原料为合金形式又含有大量鋅时,用吹炼法使大部鋅成ZnO除去,然后进行盐类制造。 (2) 氧化鎳氧化鋅共同存在时,用木屑或粗淀粉在坩堝爐中还原。控制750℃±50℃的溫度使鎳成金属細末,而氧化鋅不变。然后用稀酸洗去氧化鋅将鎳留下来。用这种方法除鋅,鋅的含量,存在于鎳屑中,能低于1％。 (3) 含很多鋅的盐类虽然能控制一定酸度,用結晶法减少含鋅量,但照(2)法处理除鋅,还是比较可靠。
In addition to the general method of zinc 1. In the manufacture of salt, the raw material processing: (1) If the raw material for the alloy contains a large amount of zinc, the most zinc by blowing method to remove ZnO, and then salts . (2) When nickel oxide zinc oxide coexists, it is reduced with crumb or raw starch in a crucible furnace. Control the temperature of 750 ℃ ± 50 ℃ so that the nickel into fine metal, and zinc oxide unchanged. Then dilute the zinc oxide wash to leave the nickel. In this method of removing zinc, zinc content, in nickel scrap, can be less than 1%. (3) although a lot of zinc salts can control a certain degree of acidity, using the crystallization method to reduce the amount of zinc, but according to (2) method to remove zinc, or more reliable.