| abstract |
The invention discloses a kind of processing method of tin removal waste liquor and stream treatment lines, it is convenient for the tin in tin removal waste liquor, iron, copper etc. carries out oxidation processes, generate solution of metal sulfates, then ammonium hydroxide addition and solid-liquid separation step are carried out, wherein, when ammonium hydroxide being added for the first time, pH value is adjusted between 0.6~0.8, convenient for stannic hydroxide precipitating and reduce the precipitatings of other metal hydroxides to the greatest extent, to obtain the first tin mud of higher quality after separation of solid and liquid, when second of addition ammonium hydroxide, pH value is adjusted between 1.0~1.2, to obtain the second tin mud of time high-quality after separation of solid and liquid, third time is additionally added calcium salt and PAM solution when ammonium hydroxide is added, convenient for the precipitating of iron hydroxideï¼›In addition, this case, which carries out ion exchange to third mixed liquor by ion exchange system, obtains more pure ammonium nitrate solution in order to remove the copper ion and other metal ions in third mixed liquor. |