Method for precipitating nickel with alkaline step by step
A technology of alkali precipitation and lye solution, applied in the field of metallurgy, can solve problems such as increasing the water treatment capacity, and achieve the effects of speeding up the reaction speed, improving the utilization rate and high efficiency
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Embodiment 1
[0015] Under stirring, 20% sodium hydroxide was continuously pumped into the nickel-containing solution, the reaction temperature was 10℃, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 5.5; further, under stirring, 10 % Sodium bicarbonate was continuously pumped into the above-mentioned nickel-containing solution with pH adjusted once, the reaction temperature was 30℃, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 6.5; further, under stirring, 10 % Sodium carbonate is continuously pumped into the above-mentioned nickel-containing solution with secondary pH adjustment, the reaction temperature is 30℃, the reaction time is 30 minutes, and the pH of the nickel-containing solution is adjusted to 7.5; finally, under stirring, the 5% The sodium hydroxide of the sodium hydroxide was continuously pumped into the above-mentioned nickel-containing solution whose pH was adjusted three times, t...
Embodiment 2
[0017] Under stirring, 50% potassium hydroxide was continuously pumped into the nickel-containing solution, the reaction temperature was 80°C, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 5.5; further, under stirring, 30 % Potassium bicarbonate was continuously pumped into the above-mentioned nickel-containing solution with pH adjusted once, the reaction temperature was 30℃, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 6.5; further, under stirring, 1 % Potassium carbonate was continuously pumped into the above-mentioned nickel-containing solution with secondary pH adjustment, the reaction temperature was 30℃, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 7.2; finally, under stirring, the continuous pump The pH of the nickel-containing solution is adjusted to 8.2 by adding it into the above-mentioned nickel-containing solution whose ...
Embodiment 3
[0019] Under stirring, 5% ammonium hydroxide was continuously pumped into the nickel-containing solution, the reaction temperature was 30°C, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 6.0; further, under stirring, 1 % Ammonium bicarbonate was continuously pumped into the above-mentioned nickel-containing solution with the pH adjusted once, the reaction temperature was 30°C, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 6.5; further, under stirring, 30 % Ammonium carbonate was continuously pumped into the above-mentioned nickel-containing solution with secondary pH adjustment, the reaction temperature was 40℃, the reaction time was 30 minutes, and the pH of the nickel-containing solution was adjusted to 7.0; finally, under stirring, 10% The ammonium hydroxide was continuously pumped into the above-mentioned nickel-containing solution whose pH was adjusted three times, the reaction...
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