公开(公告)号：US12209041B2

公开(公告)日：2025-01-28

申请号：US17861058

申请日：2022-07-08

Applicant: Graymont Western Canada Inc.

Inventor： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan

IPC: C02F11/145 ,  B09C1/08 ,  C02F1/52 ,  C02F1/66 ,  C10G1/04 ,  B01D21/01 ,  C02F103/10

Abstract: Methods and systems for reducing greenhouse gas emissions from sediments containing organic materials via treatment with lime are disclosed herein. In some embodiments, the method comprises (i) providing sediments comprising a first pH less than 10.0, fermentable organic materials, and microbes configured to produce carbon dioxide and/or methane via degradation of the organic material; (ii) adding a coagulant comprising lime to the sediment to produce a mixture comprising a second pH of at least 11.0 and excess soluble calcium ions; and (iii) after adding the coagulant, forming a buffer comprising soluble sodium and calcium bicarbonates within the mixture by enabling the excess soluble sodium and calcium ions to react with carbon dioxide. Forming the buffer can comprise decreasing the pH of the mixture from the second pH to a third pH of 8.0 or greater.

公开(公告)号：US12091361B2

公开(公告)日：2024-09-17

申请号：US18462334

申请日：2023-09-06

Applicant: Graymont Western Canada Inc.

Inventor： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan ,  Jared Ira Leikam ,  Katherine Hyman ,  Lucas McFarlane ,  Joseph Lewis

IPC: C04B28/12 ,  C04B7/34 ,  C04B7/52 ,  C04B28/18 ,  C04B111/00 ,  C04B111/10

CPC classification number: C04B28/12 ,  C04B7/34 ,  C04B7/52 ,  C04B28/184 ,  C04B2111/00215 ,  C04B2111/00724 ,  C04B2111/10

Abstract: A composition configured to be mixed with cement, and associated systems and methods are disclosed herein. In some embodiments, the composition includes at least 10% by weight lime particles, and at least 35% by weight pozzolan particles. Properties of the composition can include a magnesium oxide concentration of at least 0.5%, and an iron oxide concentration of at least 0.5-2.0%, an aluminum oxide concentration of 2-8%, a silicon dioxide concentration of 20-40%, a potassium oxide concentration of 20,000-30,000 ppm, and a sodium oxide concentration of 10,000-20,000 ppm. In some embodiments, the lime-based cement extender composition, or product, is combined with cement to produce a cement blend for use in the mining industry as mine backfill.

公开(公告)号：US20230416151A1

公开(公告)日：2023-12-28

申请号：US18462334

申请日：2023-09-06

Applicant: Graymont Western Canada Inc.

Inventor： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan ,  Jared Ira Leikam ,  Katherine Hyman ,  Lucas McFarlane ,  Joseph Lewis

IPC: C04B28/12 ,  C04B7/34 ,  C04B7/52 ,  C04B28/18

CPC classification number: C04B28/12 ,  C04B7/34 ,  C04B7/52 ,  C04B28/184 ,  C04B2111/00215

Abstract: A composition configured to be mixed with cement, and associated systems and methods are disclosed herein. In some embodiments, the composition includes at least 10% by weight lime particles, and at least 35% by weight pozzolan particles. Properties of the composition can include a magnesium oxide concentration of at least 0.5%, and an iron oxide concentration of at least 0.5-2.0%, an aluminum oxide concentration of 2-8%, a silicon dioxide concentration of 20-40%, a potassium oxide concentration of 20,000-30,000 ppm, and a sodium oxide concentration of 10,000-20,000 ppm. In some embodiments, the lime-based cement extender composition, or product, is combined with cement to produce a cement blend for use in the mining industry as mine backfill.

公开(公告)号：US11718543B2

公开(公告)日：2023-08-08

申请号：US17124089

申请日：2020-12-16

Applicant: Graymont Western Canada Inc.

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

IPC: 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 classification number: 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

Abstract: 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

Applicant: Graymont Western Canada Inc.

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

IPC: C02F1/52 ,  C02F1/38 ,  C02F1/00

CPC classification number: C02F1/5281 ,  C02F1/004 ,  C02F1/385 ,  C02F1/5245 ,  C02F1/56

Abstract: 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：US20210101807A1

公开(公告)日：2021-04-08

申请号：US17123875

申请日：2020-12-16

Applicant: Graymont Western Canada Inc.

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

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

Abstract: 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：US20240425415A1

公开(公告)日：2024-12-26

申请号：US18828783

申请日：2024-09-09

Applicant: Graymont Western Canada Inc.

Inventor： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan ,  Jared Ira Leikam ,  Katherine Hyman ,  Lucas McFarlane ,  Joseph Lewis

IPC: C04B28/12 ,  C04B7/34 ,  C04B7/52 ,  C04B28/18 ,  C04B111/00 ,  C04B111/10

Abstract: A composition configured to be mixed with cement, and associated systems and methods are disclosed herein. In some embodiments, the composition includes at least 10% by weight lime particles, and at least 35% by weight pozzolan particles. Properties of the composition can include a magnesium oxide concentration of at least 0.5%, and an iron oxide concentration of at least 0.5-2.0%, an aluminum oxide concentration of 2-8%, a silicon dioxide concentration of 20-40%, a potassium oxide concentration of 20,000-30,000 ppm, and a sodium oxide concentration of 10,000-20,000 ppm. In some embodiments, the lime-based cement extender composition, or product, is combined with cement to produce a cement blend for use in the mining industry as mine backfill.

公开(公告)号：US12122722B2

公开(公告)日：2024-10-22

申请号：US18390399

申请日：2023-12-20

Applicant: GRAYMONT WESTERN CANADA INC.

Inventor： Narain Hariharan ,  Michael John Tate ,  Nikolas Andrei Romaniuk

IPC: C04B14/14 ,  C04B14/28 ,  C04B18/08 ,  C04B18/14 ,  C04B28/10 ,  C04B28/12 ,  C04B40/02 ,  C09K17/10 ,  C04B111/00

CPC classification number: C04B28/12 ,  C04B14/14 ,  C04B14/28 ,  C04B18/08 ,  C04B18/141 ,  C04B28/10 ,  C04B40/0231 ,  C09K17/10 ,  C04B2111/00017 ,  C04B2111/00732 ,  C04B2201/50 ,  Y02P40/18

Abstract: Methods and systems for storing and mineralizing carbon dioxide in soil are disclosed herein. In some embodiments, the method comprises adding lime and carbon dioxide to a soil column including soil to form treated soil. After adding the lime and carbon dioxide, the method also includes strengthening the treated soil in the soil column by mineralizing the lime and carbon dioxide in the soil column. The method can further include adding a binder to the soil column and mixing the binder with the soil, lime, and carbon dioxide. The binder can include, for example, pozzolan, cement, cementitious material, and/or a manufactured calcium carbonate product.

公开(公告)号：US20240199493A1

公开(公告)日：2024-06-20

申请号：US18390399

申请日：2023-12-20

Applicant: GRAYMONT WESTERN CANADA INC.

Inventor： Narain Hariharan ,  Michael John Tate ,  Nikolas Andrei Romaniuk

IPC: C04B28/12 ,  C04B14/14 ,  C04B14/28 ,  C04B40/02 ,  C09K17/10

CPC classification number: C04B28/12 ,  C04B14/14 ,  C04B14/28 ,  C04B40/0231 ,  C09K17/10 ,  C04B2111/00732 ,  C04B2201/50

Abstract: Methods and systems for storing and mineralizing carbon dioxide in soil are disclosed herein. In some embodiments, the method comprises adding lime and carbon dioxide to a soil column including soil to form treated soil. After adding the lime and carbon dioxide, the method also includes strengthening the treated soil in the soil column by mineralizing the lime and carbon dioxide in the soil column. The method can further include adding a binder to the soil column and mixing the binder with the soil, lime, and carbon dioxide. The binder can include, for example, pozzolan, cement, cementitious material, and/or a manufactured calcium carbonate product.

公开(公告)号：US20230202925A1

公开(公告)日：2023-06-29

申请号：US18087728

申请日：2022-12-22

Applicant: Graymont Western Canada Inc.

Inventor： Nikolas Andrei Romaniuk ,  Michael John Tate ,  Narain Hariharan ,  Jared Ira Leikam ,  Katherine Hyman ,  Lucas McFarlane ,  Joseph Lewis

IPC: C04B28/12 ,  C04B28/18 ,  C04B7/52 ,  C04B7/34

CPC classification number: C04B28/12 ,  C04B28/184 ,  C04B7/52 ,  C04B7/34 ,  C04B2111/00215

Abstract: A lime-based cement extender composition, and associated systems and methods are disclosed herein. In some embodiments, the lime-based cement extender composition includes 5-20% by weight lime particles, 40-50% by weight limestone particles, and 40-50% by weight pozzolan particles. Additionally or alternatively, the lime-based cement extender composition can comprise a calcium oxide concentration of 45-65%, a magnesium oxide concentration of 0.5-2%, an iron oxide concentration of 0.5-2.0%, an aluminum oxide concentration of 2-8%, a silicon dioxide concentration of 20-40%, a potassium oxide concentration of 20,000-30,000 ppm, and a sodium oxide concentration of 10,000-20,000 ppm. In some embodiments, the lime-based cement extender composition, or product, is combined with cement to produce a cement blend for use in the mining industry as mine backfill.