A resource recovery method for metal ions in pickling waste liquid, products made therefrom and uses thereof
A technology of pickling waste liquid and metal ions, which is applied in the field of resource utilization of pickling waste liquid, and can solve the problems such as no method for precipitation and regeneration of pickling waste liquid.
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Embodiment 1
[0073] (1) After the pickling waste liquid of the galvanizing plant is settled to remove slag, add ferrous sulfate until its quality is 5% of the quality of the pickling waste liquid after slag removal, and then add alkaline lime as a precipitant until its quality is 5% of that of slag removal 10% of the quality of the pickling waste liquid, adjust the pH of the pickling waste liquid to 12, the metal ions are completely precipitated, and settle for 24 hours to obtain the pickling waste residue;
[0074] (2) in the pickling waste residue of step (1), adding the calcium oxide that quality is 10% of pickling waste residue quality carries out ball milling;
[0075] (3) adding quality to the product of step (2) is 5% montmorillonite, 3% glass fiber and 2% cotton of the pickling waste quality respectively, and mixes in a mixer;
[0076] (4) Adding quality to the product of step (3) is 25% water and 3% stearic acid of the pickling residue quality, kneading in a kneader, and filtering...
Embodiment 2
[0082] (1) After the pickling waste liquid of the galvanizing plant is settled to remove slag, add zinc nitrate until its quality is 5% of the quality of the pickling waste liquid after slag removal, and then add calcium carbide slag as a precipitant until its quality is 5% of that of the pickling waste liquid after slag removal. 10% of the quality of the waste pickling liquid, adjust the pH of the pickling waste liquid to 11, the metal ions are completely precipitated, and settle for 24 hours to obtain the pickling waste residue;
[0083] (2) in the pickling waste residue of step (1), add the calcium oxide that quality is 5% and the sodium carbonate of 5% of pickling waste residue quality and carry out ball milling;
[0084] (3) in the product of step (2), add the kaolin that quality is 5% of pickling waste quality, the glass fiber of 3% and the cotton of 5% respectively in the product of step (2), carry out mixing in mixer;
[0085] (4) adding quality to the product of step ...
Embodiment 3
[0089] (1) After the pickling waste liquid of the galvanizing plant is settled to remove the slag, add respectively 2% zinc nitrate and 5% ferrous sulfate of the quality of the pickling waste liquid after the slag removal, and then add calcium carbide slag as a precipitating agent to The mass is 10% of the mass of the pickling waste liquid after slag removal, the pH of the pickling waste liquid is adjusted to 12, the metal ions are completely precipitated, and the pickling waste residue is obtained after settling for 24 hours;
[0090] (2) in the pickling waste residue of step (1), add the zinc oxide that quality is 5% of pickling waste residue quality and the sodium carbonate of 10% carry out ball milling;
[0091] (3) in the product of step (2), add the kaolin that quality is 5% of pickling waste quality, the glass fiber of 3% and the cotton of 1% respectively in the product of step (2), carry out mixing in mixer;
[0092] (4) Adding 25% water, 1% oleic acid and 2% stearic a...
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Abstract
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