Choosing a SAG Mill To Achieve Design Performance. John Starkey1, Principal Consulting Engineer Sami Hindstrom2, Manager, Grinding Travis Orser2, Project Manager, Grinding. Starkey & Associates Grinding Design and Process Engineering 336 – 268 Lakeshore Rd. E. Oakville, Ontario L6J 7S4 PH: (905) 465-7512 Fax (905) 844-5297.
Control stabilization for SAG mills. BrainWave is ideally suited to stabilize the operation of SAG mills. Effective grinding in a SAG mill depends largely on how it is loaded. A mill containing too much material does not allow for adequate movement of the ore and balls. A mill that does not contain enough material does not take advantage of the ...
The Los Colorados mill consists of 3 SAG mills, two SAG with two ball mills each and the SAG3 with three ball mills. The Line 1 and Line 2 mill circuits in the Laguna Seca plant consist of one SAG mill and four ball mills. The SAG mill reduces the size of the ore from an average feed size of 10 cm to a product of about 5 cm in size.
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The SAG mill, also known as the Semi-Autogenous Grinding mill, is a key piece of equipment in the mining industry. It plays a crucial role in the comminution …
Semi-autogenous grinding (SAG) mill liner design and development. increasing the mill speed (where possible) to compensate for lowered shell lifter height; increasing mill …
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Product Size: All passing 6 mesh with 80% passing 20 mesh. Net power from pilot plant: 16.5 KWH/ST. Mill, gear and pinion friction multiplier: 1.025. Mill Power required at pinionshaft = (240 x 16.5 x 1.025) ÷ 0.746 = 5440 Hp. Speed reducer efficiency: 98%. 5440 Hp ÷ 0.98 = 5550 HP (required minimum motor output power).
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The repairs to ndida's Laguna Seca SAG mill were successfully completed in August 2009, however the repairs impacted production in the quarter. ndida's production in …
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Polysius supplies for the new grinding plant comprise an SAG mill of 6.1 m diameter x 2.7 m length with a 1,400 kW COMBIFLEX® drive and a ball mill of [...] 4.6 m diameter x 8.84 m length with a 2,950 kW COMBIFLEX® drive.
ommodated in the liner design and changed when and if necessary.For large mills, using 125 to 140 mm (5 to 5-1/2 in.) feed ball size, conventional new lifter-liner dimensions are around 300 to 350 mm (12 to 14 in.) overall height above the shell, with around 10. mm (4 in.) plate thickness and around 150 mm (6 in.) top.
Understand the key process drivers affecting the SAG mill performance by assessing the SAG mill performance using comminution models. The objective is to identify the key …
Based on experience, mill-liner designs have moved toward more open-shell lifter spacing, increased pulp lifter volumetric capacity, and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. As a guideline, mill throughput is maximized with shell lifters between ratios of 2.5:1 and 5.0:1.
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Purchase this Article for $25.00. "SAG mill liners are designed for protecting the mill shell and providing lifting power for ore charge and grinding media. Due to the impacts from the charge and the grinding media, the liner experiences dimple, plastic deformation, strain hardening, fatigue, peening and final failure.
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Translate Laguna seca. See Spanish-English translations with audio pronunciations, examples, and word-by-word explanations.
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1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.
Figure 3 shows a typical semi-autogenous (SAG) circuit with feed coming directly from a primary crusher, and the semi-autogenous mill product going to the separation process. Many similar semiautogenous …
Paper held at SAG Conference 2011 - By S. Gaulocher (ABB), K.S. Stadler (ABB), Th. von Hoff (ABB), R. Veldsman (ABB), A. Fuerst (ABB) and J. Koponen (ABB): Gearless mill drives (GMDs) are the workhorse in the mineral processing industries, more specifically when it comes to grinding crushed ore and cement (in various production stages) in …
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If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere. Underground mines are an example: the hoisting capacity of the mine shaft is the rate-limiting step in the process, and the SAG mill must adapt to ...
Greatly accelerated liner wear due to high-energy impacts on the liner. For a 5m diameter mill these will be in excess of 8m.s-1, for a 10m diameter mill these exceed 12m.s-1. This causes high chrome liners to spall and crack and they may even fracture. This can reduce liner life from a year to less than a few months.
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Some protection functions have tripped in the gearless mill drives operating at Minera ndida and have been reviewed subsequently. This paper describes improvements …
Consequences of SAG mill feed chute leakage (a sample case study): 400 tph gold operation with ore grade of 0.1 oz / ton. Leaking feed chute contaminates main bearings and lubrication unit. Cleaning/flushing main bearing oil results in 24 to 48 hours of downtime. 400 tph x 0.1 oz / ton = 40 oz of lost gold production/ hr.