Method for preparing building material by purifying and classifying low-quality hardened phosphogypsum

The invention discloses a method for preparing a building material by purifying and classifying low-quality hardened ardealite. The method comprises the following steps: 1) feeding the low-quality hardened ardealite into a ceramic ball mill, and grinding to obtain ardealite slurry; 2) feeding the ar...

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Bibliographische Detailangaben
Hauptverfasser: DU LINGPAN, XU SHUAI, LI HAIBING, FAN PEIQIANG, GUO YONGJIE, CHEN CIYUN, LI JIANGLI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention discloses a method for preparing a building material by purifying and classifying low-quality hardened ardealite. The method comprises the following steps: 1) feeding the low-quality hardened ardealite into a ceramic ball mill, and grinding to obtain ardealite slurry; 2) feeding the ardealite slurry into an ultrasonic cleaning machine for ultrasonic oscillation cleaning; (3) the obtained foam product is high-silicon tailings, and the obtained underflow product is high-purity phosphogypsum slurry; 4) feeding the high-silicon tailings into a filter for filtering, and doping fly ash and an alkali activator into the filtered high-silicon tailings to obtain a phosphogypsum-based polymer; 5) filtering the high-purity ardealite slurry through a filter, drying the high-purity ardealite slurry through a drying oven, and finally roasting the high-purity ardealite slurry through a roasting furnace to prepare high-quality beta semi-hydrated gypsum powder; the method provided by the invention is simple and f