Method for removing impurities from ardealite through alkali liquor rotational flow

• Main Authors: HE JIANCHAO, CHEN HAO, LI CHUNLIN, YUE HAIRONG, MA PEIGEN, LEI TING, WANG YAN
• Format: Patent
• Language: Chinese; English
• Published: 22.11.2022
• Subjects: CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY

The invention belongs to the technical field of solid waste resource utilization, and particularly relates to a method for removing impurities from ardealite waste residues. The method specifically comprises the following steps: preparing slurry from phosphogypsum and alkali liquor, carrying out cyclone separation, screening an underflow port product, feeding the screened underflow port product into a next-stage cyclone, and taking an underflow port product of a second-stage cyclone as a gypsum product. The ardealite solid waste is treated in a hydraulic cyclone mode, compared with a neutralization method and a calcination method, the problems of high energy consumption and secondary pollution do not exist, the used equipment is simple, the occupied area is small, and the operation cost is low; the alkali liquor can effectively remove silicon oxide in the ardealite, so that the purity of calcium sulfate in the gypsum product is remarkably improved; products obtained after primary cyclone is screened are subje