公开(公告)号：US20220081332A1

公开(公告)日：2022-03-17

申请号：US17419903

申请日：2020-01-25

申请人： Dow Global Technologies LLC

发明人： Lizbeth Rostro ,  Wu Chen ,  Paul A. Gillis ,  Michael K. Poindexter

IPC分类号： C02F1/56 ,  C02F11/127 ,  C02F11/147 ,  B01F23/53 ,  B01F27/115 ,  B01F35/71

摘要： Embodiments relate continuous process for treating tailings that includes providing tailings for treatment having at least 20 wt % solids, providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding flocculants, an outlet for a mixture of the tailings and flocculants, and a rotating disk, the first inlet being separate from the second inlet, the second inlet being above the rotating disk, and the rotating disk having a tip speed at least 2 m/s, continuously introducing into the mixing apparatus the tailings through the first inlet and the flocculants through the second inlet, allowing the tailings and the flocculants to mix on the rotating disk to form the mixture of the tailings and flocculants, continuously removing the mixture of the tailings and flocculants through the outlet to form a treated mixture, and flowing the treated mixture from the mixing apparatus for further treatment or to a disposal area.

公开(公告)号：US20230242432A1

公开(公告)日：2023-08-03

申请号：US18004792

申请日：2021-07-08

申请人： Dow Global Technologies LLC

发明人： Lizbeth Rostro ,  Wu Chen ,  Paul A. Gillis ,  Michael K. Poindexter

IPC分类号： C02F11/147 ,  C02F11/127

CPC分类号： C02F11/147 ,  C02F11/127 ,  C02F2103/10

摘要： Embodiments relate to a continuous process for treating tailings that includes providing tailings for treatment having at least 10 wt % solids, providing a mixing apparatus having a first inlet for feeding the tailings, a second inlet for feeding a non-dispersion liquid flocculant that includes a polyethylene glycol having a weight average molecular weight from 100 g/mol to 2,000 g/mol, and an outlet for a mixture of the tailings and the non-dispersion liquid flocculant, continuously introducing into the mixing apparatus the tailings through the first inlet and the non-dispersion liquid flocculant through the second inlet, and allowing the tailings and the non-dispersion liquid flocculant to mix to from the mixture of the tailings and the non-dispersion liquid flocculant.

公开(公告)号：US20200318013A1

公开(公告)日：2020-10-08

申请号：US16753529

申请日：2018-10-12

申请人： Dow Global Technologies LLC

发明人： Lizbeth Rostro ,  Wu Chen ,  Paul A. Gillis ,  Michael K. Poindexter ,  Jason A. Tubbs ,  Cole A. Witham

IPC分类号： C10G1/04 ,  C10G33/04 ,  C02F11/14 ,  C02F1/56 ,  C08L71/02

摘要： The present invention relates to a method for transporting, flocculating, and dewatering an aqueous tailings stream. Said method comprises adding a flocculant composition comprising a poly(ethylene oxide) (co)polymer with the aqueous tailings stream wherein the aqueous tailings stream has 15 wt % or less solids. Said method is particularly useful for the treatment of suspensions of particulate material, especially waste mineral slurries, especially for the treatment of tailings and other waste material resulting from mineral processing, in particular, the processing of oil sands tailings.