24-11-2010 дата публикации
Номер: CN0101891251A
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The invention discloses a chromium- and aluminum-containing mud alkaline-method recycling process, which comprises: adding water into chromium- and aluminum-containing mud to make slurry, adding sodium hydroxide till the pH value of the slurry is more than or equal to 10.8, adding a reducer into the slurry, and heating the slurry till the slurry boils to obtain a deep green precipitate; filtering the slurry; washing the filter cake with hot water at a temperature above 50 DEG C, adding acid to neutralize the filter cake, washing the filter cake with hot water, filtering the filter cake, and obtaining the filter cake which is Cr(OH)3; and adding an acid into the filtrate for acidification, filtering the filtrate, adding an alkali into the filtrate for neutralization to obtain a white precipitate, washing and drying the white precipitate to obtain a Al(OH)3 PRODUCT. The process adopts normal operation, avoids using a large amount of energy and discharging three wastes, and realizes low labor ...
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