chromic sodium alum
铬钠矾
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重铬酸钠红矾钠 sodium dichromate
该工艺采用焙烧法将污泥中的金属组分同类分离，并结合黄钠铁矾沉淀法去除杂质铁等工艺对铜、镍、铬进行了回收利用。
Different metals are separated from the electroplating sludge by roasting and copper, nickel and chromium were recovered with suitable methods such as removing iron by sodium jarosite precipitation.
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