公开(公告)号：US20230312360A1

公开(公告)日：2023-10-05

申请号：US17848530

申请日：2022-06-24

申请人： TONGJI UNIVERSITY

发明人： Fengting Li ,  Ying Wang ,  Yifan Gu ,  Tao Kong ,  Zekun Li

IPC分类号： C01F7/57

CPC分类号： C01F7/57

摘要： Disclosed is a method for continuously producing polyaluminum chloride from aluminum slag, comprising: blending the aluminum slag with water into a slurry in a mixing tank; pumping the slurry and a sodium hydroxide solution into a first mixing reactor; introducing the mixture obtained in the first mixing reactor into a second mixing reactor and pumping hydrochloric acid into the second mixing reactor; and filtering the resulting mixture and allowing filtrate for ripening, polymerization and sedimentation to obtain liquid polyaluminum chloride; wherein each of the reactors is pipeline-shaped, arranged horizontally and provided with a spiral conveyor shaft inside which is arranged horizontally and configured to stir and convey the mixture in a pipeline. This method realizes a continuous treatment of aluminum slag together with a continuous recovery of ammonia nitrogen and produces PAC, thereby achieving resourceful utilization and improved operability.