公开(公告)号：US20200231504A1

公开(公告)日：2020-07-23

申请号：US16749105

申请日：2020-01-22

Applicant: KUNMING UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： PING NING ,  YU LIU ,  BIN LI ,  YINGJIE ZHANG ,  PENG DONG ,  JIANG QI

IPC: C04B28/14 ,  C04B18/04 ,  C04B24/26 ,  C04B24/18 ,  C04B24/12 ,  C04B14/08 ,  C04B14/04

Abstract: The present invention discloses a method for synergistic stabilization/solidification of red mud and phosphogypsum. The method includes: grinding and mixing red mud and phosphogypsum, adding deionized water, uniformly stirring the mixture to prepare slurry, adjusting a pH value of the slurry to 7.5-8.5, adding a conditioner and conducting stirring, adding a stabilizer and an anti-permeability agent, uniformly stirring the mixture to obtain a gel product, and conducting solidification for 12-24 h to solidify the red mud and phosphogypsum, to obtain a red mud-phosphogypsum solidified material. In the present invention, the neutralization reaction between acidic ions in phosphogypsum and basic ions in red mud is adopted to reduce a pH value of the red mud and a transfer capability of pollutants in waste residues; synergistic solidification processing is conducted on two types of solid wastes: red mud produced in the aluminum smelting industry and phosphogypsum produced in the phosphorus chemical industry.