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Collahuasi Sag Mill Failure

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Literature Review: Gearless Motor Failures – A Mill,

10/09/2014· The Collahuasi motor was for a 40 ft SAG mill. The Antamina 38 ft SAG mill was also driven by an ABB motor and the hanger plates had not failed on that machine after several years of operation. Similarly, the Sossego motor for the 38 ft SAG mill had not failed. It too had an ABB motor and it had operated longer than the Collahuasi motor. Inspections of the Sossego motor indicated that the,Insurability of Large Gearless Mill Drives (GMDs),28/09/2014· Let us hope not because the original Collahuasi and Antamina SAG mill stators most likely would still be operating had they been wound with the type of VPI parallel windings used by Siemens. In this post, we review the new 24 h repair criterion proposed in [5] and how it applies to winding design. The key items in an engineering risk assessment presented in the last section of [5] are also be,Engineering and Project Management History,Collahuasi Mine Component Failure Analysis Ball mill repair support Collahuasi Mine Mill Support Mill support services including inspection of damage to ball mills and provision of independent assessment report Copperchem Limited Great Australia Operations Preparation of schematics and specifications for the design and construction of grinding mill trunnion lubrication system Cullen Mining,

SAG MILLS OPTIMIZATION: IMPLEMENTATION AND EVALUATION

Mill Capacity Open SAG Plant Diameter, feet Diameter, feet Long, feet Screen tph Wide, mm Long, mm Area, % C.M.D.I. Collahuasi 32 14,4 13,6 No 1.320 15 30 27,0 Minera Los Pelambres 36 15,9 16,4 No 2.912 17 38 26,0 Minera Escondida 38 20,3 11,2 Si 5.170 25 60 29,0 Minera Antamina 38 15,9 16,4 No 5.472 15 38 23,0 C.M.D.I. Collahuasi 40 16,5 16,9 No 4.480 25 50 22,8 Minera Esperanza 40 15,4Insurability of Large Gearless Mill Drives (GMDs),28/09/2014· Let us hope not because the original Collahuasi and Antamina SAG mill stators most likely would still be operating had they been wound with the type of VPI parallel windings used by Siemens. In this post, we review the new 24 h repair criterion proposed in [5] and how it applies to winding design. The key items in an engineering risk assessment presented in the last section of [5] are also be,Engineering and Project Management History,Collahuasi Mine Component Failure Analysis Ball mill repair support Collahuasi Mine Mill Support Mill support services including inspection of damage to ball mills and provision of independent assessment report Copperchem Limited Great Australia Operations Preparation of schematics and specifications for the design and construction of grinding mill trunnion lubrication system Cullen Mining,

SAG MILLS OPTIMIZATION: IMPLEMENTATION AND EVALUATION IN,

Mill Capacity Open SAG Plant Diameter, feet Diameter, feet Long, feet Screen tph Wide, mm Long, mm Area, % C.M.D.I. Collahuasi 32 14,4 13,6 No 1.320 15 30 27,0 Minera Los Pelambres 36 15,9 16,4 No 2.912 17 38 26,0 Minera Escondida 38 20,3 11,2 Si 5.170 25 60 29,0 Minera Antamina 38 15,9 16,4 No 5.472 15 38 23,0 C.M.D.I. Collahuasi 40 16,5 16,9 No 4.480 25 50 22,8 Minera Esperanza 40 15,4UPDATE 1-Escondida declares force majeure on some,The shutdown of the SAG, or semi autogenous grinding mill, could cut up to 10 percent of total copper output from the mine in northern Chile, a spokesman at Escondida's majority owner, BHP,Business News: Mining - Chile - Collahuasi expansions,,30/11/2008· The mine will carry out a US$64mn concentrator debottlenecking project to iron out kinks related to a SAG mill failure this year and in the process add 30,000t/y to output, Fernández said. Afterwards, Collahuasi aims to propose to its owners in the first quarter of 2009 a US$750mn expansion to up output to 650,000t/y in 2010, she added. At a later stage the company has said it also intends to,

A novel approach to the geometallurgical modelling of the,

01/10/2009· The SAG mill is currently the largest of its kind in the world. The SAG mill trommel oversize product (pebbles) is sent to the pebble crushing plant, consisting of two pebble crushers in parallel. Crushed pebbles are returned to the coarse ore stockpile. The ball mills work in a reverse classification circuit, in which the hydrocyclone underflow feeds into the ball mills and the hydrocyclone,Major Mines & Projects | Collahuasi Mine,Collahuasi Open Pit Mine is located 174 km SE from Iquique, Chile. Data Access Keep me signed in.,SAG mill: 3: Ball mill: 4: Processing. Sulfuric acid (reagent) Flotation; Heap leach ; Solvent Extraction & Electrowinning; Flow Sheet: Summary: Oxide and mixed ores are treated by heap-leaching, solvent-extraction and electro-winning (SX-EW). Sulphide ore is crushed, ground and treated by,SAG Mills Archives | Mineral Processing & Metallurgy,To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered. Each of these topics has had a considerable amount of research, Read more. SAG Mill Grinding Circuit,

Machinery Failure - Gilmore Engineers Pty Ltd

Failure Analysis of a SAG Mill. Towards the end of its service life, a 34ft diameter SAG mill developed cracks in the corner weld. Our engineer inspected the mill. Finite Element Analysis (FEA) was conducted on the shell to determine the reduction in stress intensity at the repaired site. Recommendations were provided for its continuing use and potential replacement. Our engineer performed a,The Siemens 42ft gearless mill drive, still an,,tural failure. The gap between the model and the real sys-tem is usually closed by prototype testing, however this is not an option for a 42ft Gearless Mill Drive. The ring motor is not self-supported and needs the mill to fix the rotor poles to and it needs the mill foundation to support the stator. Finally you would need a few thousand tons of ore and possibly even an earthquake would be,Engineering and Project Management History,Collahuasi Mine Component Failure Analysis Ball mill repair support Collahuasi Mine Mill Support Mill support services including inspection of damage to ball mills and provision of independent assessment report Copperchem Limited Great Australia Operations Preparation of schematics and specifications for the design and construction of grinding mill trunnion lubrication system Cullen Mining,

critical analysis of sag mill collahuasi

This review serves to highlight these problems and how they can be tackled in a SAG mill at speeds in excess of 70% of critical because of impact on the shell. Collahuasi: “The original SAG mill liner design Hi-Hi with a 6 degree contact. Escondida Copper Gold and Silver Mine Atacama Desert Grinding mills in the Escondida concentrator. In this report we look at the 30 big tech themes for,UPDATE 1-Escondida declares force majeure on some,The shutdown of the SAG, or semi autogenous grinding mill, could cut up to 10 percent of total copper output from the mine in northern Chile, a spokesman at Escondida's majority owner, BHP,Business News: Mining - Chile - Collahuasi expansions,,30/11/2008· The mine will carry out a US$64mn concentrator debottlenecking project to iron out kinks related to a SAG mill failure this year and in the process add 30,000t/y to output, Fernández said. Afterwards, Collahuasi aims to propose to its owners in the first quarter of 2009 a US$750mn expansion to up output to 650,000t/y in 2010, she added. At a later stage the company has said it also intends to,

Collahuasi, Chile - SMC Testing

The ore body is classified into six so-called UGM units and the SMC Test is used extensively in describing the SAG mill hardness variability in each of these units within a time horizon of up to 5 years. The approach adopted by the Collahuasi engineers was to develop relationships between grinding circuit throughput and ore hardness and final grind size (flotation feed size). To do this they,Major Mines & Projects | Collahuasi Mine,Collahuasi Open Pit Mine is located 174 km SE from Iquique, Chile. Data Access Keep me signed in.,SAG mill: 3: Ball mill: 4: Processing. Sulfuric acid (reagent) Flotation; Heap leach ; Solvent Extraction & Electrowinning; Flow Sheet: Summary: Oxide and mixed ores are treated by heap-leaching, solvent-extraction and electro-winning (SX-EW). Sulphide ore is crushed, ground and treated by,Industrial Solutions Project Brief,ABB also provided Collahuasi with drives and ring motors for one SAG mill and two ball mills. Powerful ABB gearless drives, rated at 15.5 mega-watts each, drive two eight-meter (26 feet) diameter ball mills that grind small pieces of ore at eleven revolutions per minute. However, the plant’s showpiece is the world’s largest gearless mill drive. The 21 megawatt ABB drives system powers the,

Analyst & Investor Presentation November 2018

• Collahuasi is located in the Region of Tarapaca in Northern Chile • The operation is located in the high Andes between 3,000 and 5,000 metres above sea level just 10km from the border with Bolivia • Our port facilities are located at Punta Patache which is close to 200km from the minesite and 70km to the south of the city of Iquique 5-1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000,SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING,SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony Moon, RTZ What I’d like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use vibrating screens or trommel screens? What many of you probably don’t realize is that at Kennecott’s Copperton concentrator, which we started up,SAG Mills Archives | Mineral Processing & Metallurgy,To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered. Each of these topics has had a considerable amount of research, Read more. SAG Mill Grinding Circuit,