Patents Assigned to Newcrest Mining Limited
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Patent number: 11994028Abstract: A block cave has a draw column height of at least 450 m, a caved volume, a single extraction level and noundercut level, a plurality of drawbells extending upwardly from the extraction level to the caved volume, and a plurality of pillars separating the drawbells and supporting the rock mass above the extraction level. Each drawbell has a drawbell height of at least 25 m. Each drawbell has the following profile when viewed from a direction perpendicular to a drawbell drive in the extraction level: a throat section having opposed parallel side walls extending upwardly from the extraction level, a tapered section above the throat section, and an undercut section above the tapered section.Type: GrantFiled: March 19, 2021Date of Patent: May 28, 2024Assignee: NEWCREST MINING LIMITEDInventors: Geoff Newcombe, Michael Sykes, Pablo Paredes, Luca Popa
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Publication number: 20220176387Abstract: A method of recovering gold and copper from a sulfide ore includes (a) removing valuable fines from a product stream from a comminution circuit, such as a crushing and milling circuit, for run of mine ore and producing a valuable fines concentrate stream and (b) processing the remaining comminution product stream after valuable fines removal and producing a valuable coarse concentrate stream.Type: ApplicationFiled: September 15, 2021Publication date: June 9, 2022Applicant: Newcrest Mining LimitedInventor: Luke Vollert
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Publication number: 20220127695Abstract: A method of recovering gold from gold-containing sulphide minerals in an ore that has a recovery-oxidation curve in a graph of % recovery of gold versus % oxidation of the minerals that has a slope of less than 1:1 in a higher % oxidation part of the curve, includes operating at least one oxidation unit to achieve a target % oxidation for sulphur in the ore that is in a higher oxidation part of the curve and producing an output having liberated gold as a consequence of sulphur oxidation in the oxidation unit and allowing variations of the % oxidation in the oxidation unit during the method.Type: ApplicationFiled: February 5, 2020Publication date: April 28, 2022Applicant: NEWCREST MINING LIMITEDInventor: John O'Callaghan
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Patent number: 11154872Abstract: A method of recovering gold and copper from a sulfide ore includes (a) removing valuable fines from a product stream from a comminution circuit, such as a crushing and milling circuit, for run of mine ore and producing a valuable fines concentrate stream and (b) processing the remaining comminution product stream after valuable fines removal and producing a valuable coarse concentrate stream.Type: GrantFiled: February 1, 2021Date of Patent: October 26, 2021Assignee: Newcrest Mining LimitedInventor: Luke Vollert
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Publication number: 20210293145Abstract: A block cave has a draw column height of at least 450 meters, a caved volume, a single extraction level and no undercut level, a plurality of drawbells extending upwardly from the extraction level to the caved volume, and a plurality of pillars separating the drawbells and supporting the rock mass above the extraction level. Each drawbell has a drawbell height of at least 25 meters. Each drawbell has the following profile when viewed from a direction perpendicular to a drawbell drive in the extraction level: a throat section having opposed parallel side walls extending upwardly from the extraction level, a tapered section above the throat section, and an undercut section above the tapered section.Type: ApplicationFiled: March 18, 2021Publication date: September 23, 2021Applicant: Newcrest Mining LimitedInventors: Michael Sykes, losif-Luca Popa, Pablo Paredes, Geoffrey Newcombe
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Patent number: 11125084Abstract: A block cave has a draw column height of at least 450 meters, a caved volume, a single extraction level and no undercut level, a plurality of drawbells extending upwardly from the extraction level to the caved volume, and a plurality of pillars separating the drawbells and supporting the rock mass above the extraction level. Each drawbell has a drawbell height of at least 25 meters. Each drawbell has the following profile when viewed from a direction perpendicular to a drawbell drive in the extraction level: a throat section having opposed parallel side walls extending upwardly from the extraction level, a tapered section above the throat section, and an undercut section above the tapered section.Type: GrantFiled: March 18, 2021Date of Patent: September 21, 2021Assignee: Newcrest Mining LimitedInventors: Michael Sykes, Iosif-Luca Popa, Pablo Paredes, Geoffrey Newcombe