公开(公告)号：US20200299145A1

公开(公告)日：2020-09-24

申请号：US16820982

申请日：2020-03-17

Applicant: Kunming University of Science and Technology

Inventor： Ping NING ,  Senlin TIAN ,  Jianhong HUANG ,  Yunjian CHEN ,  Xuewei HU ,  Yingjie LI

IPC: C01F7/06 ,  C01G49/06 ,  B01D53/50 ,  B01D53/80 ,  C22B3/06 ,  C22B3/22 ,  C22B21/00

Abstract: The present invention discloses a method for aluminum-enhanced dealkalization of red mud and separation and recovery of aluminum and iron. The method includes: dissolving red mud in water, introducing excessive SO2, introducing O2 for aeration, and refluxing part of alkaline leachate after filtering; when pH of a red mud mixture decreases to below 3, washing and filtering the red mud mixture, adding NaOH to acidic leachate to adjust its pH to a strongly alkaline level, aging and filtering the leachate, treating filter residue to recover Fe2O3, and refluxing part of alkaline leachate after filtering to the red mud mixture; and adjusting pH of the remaining alkaline leachate after filtering to a weakly acidic level, and conducting filtering to recover aluminum.

公开(公告)号：US20230321596A1

公开(公告)日：2023-10-12

申请号：US18052366

申请日：2022-11-03

Applicant: Kunming University of Science and Technology

Inventor： Yingjie LI ,  Huaying LIU ,  Senlin TIAN ,  Jingyan CHEN ,  Zimeng NIE ,  Ziyue LI ,  Qun ZHAO ,  Ping NING ,  Xuewei HU ,  Jianhong HUANG

IPC: B01D53/50 ,  B01D53/84 ,  C22B3/18

CPC classification number: B01D53/507 ,  B01D53/84 ,  B01D2257/302 ,  B01D2258/0283 ,  C22B3/18

Abstract: The present disclosure provides a method for wet removal of sulfur dioxide by silicate bacteria-enhanced pulp. The method includes: treatment of ore waste residue, activation and domestication of silicate bacteria, preparation of pulp, removal of sulfur dioxide, and resource utilization of a desulfurization product. The present disclosure combines flue gas desulfurization with resource utilization of the ore waste residue, and improves a desulfurization efficiency of the method by the pulp and a utilization rate of ore waste residue resources through silicate bacteria. The present disclosure has a high desulfurization efficiency, simple production process, and low cost, and realizes the recycling of resources such as the ore waste residue, the sulfur dioxide, and silicon. The present disclosure has obvious economic and environmental benefits and broad prospects for use.

公开(公告)号：US20200299207A1

公开(公告)日：2020-09-24

申请号：US16821043

申请日：2020-03-17

Applicant: Kunming University of Science and Technology

Inventor： Ping NING ,  Senlin TIAN ,  Jianhong HUANG ,  Qin ZHANG ,  Xuewei HU ,  Bin LI

IPC: C05G3/80 ,  C09K17/08 ,  C05F5/00 ,  C05F3/00 ,  C05C9/00 ,  C05G1/00 ,  B01D53/50 ,  B01D53/80 ,  A01C21/00 ,  A01C23/00

Abstract: The present invention discloses a method for ammonium-enhanced flue gas desulfurization (FGD) by using red mud slurry. The method specifically includes: crushing red mud, sieving the crushed red mud, slurrying the red mud, conducting aeration treatment, adding an ammonium salt and/or ammonia, and conducting natural sedimentation to obtain pretreated red mud slurry and pretreated red mud liquor; adding an ammonium salt and/or ammonia to the slurry, adding water and conducting uniform mixing, conducting pre-FGD, conducting deep desulfurization on treated flue gas by using the pretreated red mud liquor, and directly discharging desulfurized flue gas; and charging the pretreated red mud slurry and the pretreated red mud liquor obtained after the treatment to a replacement tank below, adding lime milk to the replacement tank, conducting stirring and natural sedimentation, conducting soilization on subnatant thick red mud slurry, and refluxing the supernatant to a red mud aeration tank.