公开(公告)号：US20240025778A1

公开(公告)日：2024-01-25

申请号：US18339892

申请日：2023-06-22

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/56 ,  C02F1/52 ,  C02F11/12 ,  C02F11/145 ,  C10G1/04 ,  B01D21/30 ,  F26B5/00

CPC分类号： C02F1/56 ,  C02F1/5245 ,  C02F11/12 ,  C02F11/145 ,  C10G1/045 ,  B01D21/30 ,  F26B5/005 ,  C02F2201/002 ,  C02F1/5281 ,  C02F2103/10

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US11613485B2

公开(公告)日：2023-03-28

申请号：US17840297

申请日：2022-06-14

申请人： Graymont Western Canada Inc.

发明人： Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Nikolas Andrei Romaniuk

IPC分类号： C02F11/122 ,  C02F1/52 ,  C02F11/127 ,  C02F11/145 ,  C02F11/121 ,  C02F11/143 ,  C02F103/10

摘要： Methods and systems for treating oil sands tailings streams at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 10-55% solids by total weight, increasing the pH of the tailings stream by combining the tailings stream with lime to produce a lime-tailings mixture having a pH of at least 11.0, and dewatering the lime-tailings mixture to produce a first stream having 10% or less solids by total weight and a second stream having 50% or more solids by total weight. The first stream can correspond to a release water stream, and the second stream can correspond to a cake. The lime slurry can include about 10% lime by total weight, and can comprise lime hydrate, quicklime, or a combination thereof. Dewatering the lime-tailings mixture can include routing the lime-tailings mixture to a centrifuge unit and/or a pressure or vacuum filtration unit.

公开(公告)号：US20210101808A1

公开(公告)日：2021-04-08

申请号：US17124089

申请日：2020-12-16

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/52 ,  C02F11/12 ,  C02F11/145 ,  C10G1/04 ,  B01D21/30 ,  F26B5/00

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US20190135663A1

公开(公告)日：2019-05-09

申请号：US16184689

申请日：2018-11-08

申请人： Graymont Western Canada Inc.

发明人： Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Nikolas Andrei Romaniuk

IPC分类号： C02F1/52 ,  C02F1/56 ,  C02F1/00 ,  C02F1/38

摘要： Methods and systems for treating oil sands tailings streams using multiple dosages of lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 3-40% solids by total weight, combining the tailings stream with a first dosage of lime to produce a first mixture having a pH of less than 12.0, and then combining the first mixture with a polymer to produce a second mixture. In some embodiments, the method can further include combining the second mixture with a second dosage of lime to produce a third mixture having a pH greater than 12.0, and dewatering the third mixture in a centrifuge unit and/or a pressure filtration unit to produce a product stream having 55% or more solids by weight.

公开(公告)号：US11725148B2

公开(公告)日：2023-08-15

申请号：US17560884

申请日：2021-12-23

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Narain Hariharan

IPC分类号： C10G1/04 ,  C04B18/04 ,  C02F11/145 ,  C04B18/12 ,  C02F103/10

CPC分类号： C10G1/045 ,  C02F11/145 ,  C04B18/049 ,  C04B18/12 ,  C02F2103/10 ,  C02F2209/06 ,  C10G2300/1003 ,  C10G2300/80

摘要： Methods and systems for calcining dewatered tailings and/or mine waste are disclosed herein. In some embodiments, the method comprises (i) processing dewatered tailings comprising clay minerals, (ii) calcining the processed tailings to produced calcined tailings, and (iii) altering a composition and/or one or more characteristics of the calcined tailings to produce a cementitious product. Altering the composition can include blending the calcined tailings with one or more additives, such as lime, dolomitic lime, lime kiln dust, argillaceous limestone, limestone, pulverized quicklime, ground calcium carbonate, quicklime, gypsum, natural pozzolans, artificial pozzolans, water, flow aids, or the like.

公开(公告)号：US10894730B2

公开(公告)日：2021-01-19

申请号：US16566578

申请日：2019-09-10

申请人： Graymont Western Canada Inc.

发明人： Jared Ira Leikam ,  Nikolas Andrei Romaniuk ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/52 ,  F26B5/00 ,  C02F11/145 ,  C10G1/04 ,  B01D21/30 ,  C02F11/12 ,  B65G5/00 ,  B09B1/00 ,  B01D21/01 ,  C02F11/148 ,  E21B21/06 ,  E21B43/34 ,  C02F103/10 ,  C02F1/56

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US20200239349A1

公开(公告)日：2020-07-30

申请号：US16840052

申请日：2020-04-03

申请人： Graymont Western Canada Inc.

发明人： Michael John Tate ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Nikolas Andrei Romaniuk

IPC分类号： C02F11/14 ,  C02F11/121 ,  C02F11/145 ,  C02F11/127 ,  C02F11/122 ,  C02F1/52

摘要： Methods and systems for treating oil sands tailings streams at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 10-55% solids by total weight, increasing the pH of the tailings stream by combining the tailings stream with lime to produce a lime-tailings mixture having a pH of at least 11.0, and dewatering the lime-tailings mixture to produce a first stream having 10% or less solids by total weight and a second stream having 50% or more solids by total weight. The first stream can correspond to a release water stream, and the second stream can correspond to a cake. The lime slurry can include about 10% lime by total weight, and can comprise lime hydrate, quicklime, or a combination thereof. Dewatering the lime-tailings mixture can include routing the lime-tailings mixture to a centrifuge unit and/or a pressure or vacuum filtration unit.

公开(公告)号：US20200079664A1

公开(公告)日：2020-03-12

申请号：US16566578

申请日：2019-09-10

申请人： Graymont Western Canada Inc.

发明人： Jared Ira Leikam ,  Nikolas Andrei Romaniuk ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/52 ,  C02F11/12

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US11718543B2

公开(公告)日：2023-08-08

申请号：US17124089

申请日：2020-12-16

申请人： Graymont Western Canada Inc.

发明人： Nikolas Andrei Romaniuk ,  Jared Ira Leikam ,  Jesse Wayne Fox ,  Michael John Tate ,  Narain Hariharan

IPC分类号： C02F1/56 ,  B01D21/30 ,  C02F1/52 ,  C02F11/12 ,  C02F11/145 ,  C10G1/04 ,  F26B5/00 ,  B09B1/00 ,  B65G5/00 ,  C02F11/148 ,  C02F103/10 ,  E21B21/06 ,  E21B43/34 ,  B01D21/01

CPC分类号： C02F1/56 ,  B01D21/30 ,  C02F1/5245 ,  C02F11/12 ,  C02F11/145 ,  C10G1/045 ,  F26B5/005 ,  B01D21/01 ,  B09B1/00 ,  B65G5/00 ,  C02F1/5281 ,  C02F11/148 ,  C02F2103/10 ,  C02F2201/002 ,  E21B21/068 ,  E21B43/34

摘要： Methods and systems for treating tailings at an elevated pH using lime are disclosed herein. In some embodiments, the method comprises (i) providing a tailings stream comprising bicarbonates and a pH less than 9.0, (ii) adding a coagulant comprising calcium hydroxide to the tailings stream to form a mixture having a pH of at least 11.5 and a soluble calcium level no more than 800 mg/L, and (iii) dewatering the mixture to produce a product having a solids content of at least 40% by weight. In some embodiments, the pH and soluble calcium level of the mixture cause chemical modification of clay materials of the mixture via pozzolanic reactions. In some embodiments, the undrained shear strength of the product increases over a period of time of at least two days.

公开(公告)号：US20230219832A1

公开(公告)日：2023-07-13

申请号：US18173394

申请日：2023-02-23

申请人： Graymont Western Canada Inc.

发明人： Jesse Wayne Fox ,  Michael John Tate ,  Jared Ira Leikam ,  Nikolas Andrei Romaniuk

IPC分类号： C02F1/52 ,  C02F1/38 ,  C02F1/00

CPC分类号： C02F1/5281 ,  C02F1/004 ,  C02F1/385 ,  C02F1/5245 ,  C02F1/56

摘要： Methods and systems for treating oil sands tailings streams using multiple dosages of lime are disclosed herein. In some embodiments, the method comprises providing a tailings stream including 3-40% solids by total weight, combining the tailings stream with a first dosage of lime to produce a first mixture having a pH of less than 12.0, and then combining the first mixture with a polymer to produce a second mixture. In some embodiments, the method can further include combining the second mixture with a second dosage of lime to produce a third mixture having a pH greater than 12.0, and dewatering the third mixture in a centrifuge unit and/or a pressure filtration unit to produce a product stream having 55% or more solids by weight.