Treatment method for zinc oxygen pressure leaching solution
A treatment method and solution technology are applied in the treatment field of zinc-oxygen pressure leaching solution, which can solve the problems of difficulty in ensuring that zinc oxide does not bring fluorine chloride ions, zinc loss, etc., and achieves the effect of reducing the amount of lime and solving the enrichment and recovery.
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Embodiment 1
[0036] In this embodiment, the treatment method of the zinc oxygen pressure leaching solution is: take 1L of the neutralized zinc oxygen pressure leaching solution (Zn 2+ : 160g / L), washing water 3.5L (Zn 2+ : 40g / L, H 2 SO 4 : 4g / L), add lime 0.36kg (CaO90%), control the reaction temperature 60 ℃, the reaction time 2h, the end point pH = 8, the output of 2.45L of neutralized precipitate, 2.45L of neutralized precipitate, added to 24L Zinc oxygen pressure leaching solution (Zn 2+ : 160g / L, H 2 SO 4 : 10g / L), controlled reaction temperature 80℃, reaction time 3.5h, end point pH=4, obtained qualified neutralized solution (Zn 2+ : 160g / L), the output of gypsum slag is 0.56kg (Zn content is 0.3wt%).
Embodiment 2
[0038] In this embodiment, the treatment method of the zinc oxygen pressure leaching solution is: take 1L of the neutralized zinc oxygen pressure leaching solution (Zn 2+ : 160g / L), washing water 3.5L (Zn 2+ : 40g / L, H 2 SO 4 : 4g / L), add lime 0.4kg (CaO90%), control the reaction temperature at 50°C, the reaction time is 1.5h, the end point pH=7, the output of 2.4L of neutralized precipitate, 2.4L of neutralized precipitate, added to 24L zinc oxygen pressure leaching solution (Zn 2+ : 160g / L, H 2 SO 4 : 10g / L), the reaction temperature was controlled at 70°C, the reaction time was 3h, and the end point pH=5 to obtain a qualified neutralized solution (Zn 2+ : 160g / L), the output of gypsum slag is 0.6kg (Zn content is 0.4wt%).
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