2021-3-15 · The SAG mill agreement has come about as First Majestic ordered a complete new SAG mill package, which, Condor says, is now superfluous to its requirements. The SAG mill has a mill diameter of 24 ft (7.3 m) and an effective grinding length of 18.5 ft and a structural charge mass of 315 t, Condor Gold said.

2016-6-6 · The ratio of the trunnion thickness to trunnion diameter in a mill of 2,134 m diameter is almost twice that of a mill of 5,8 m diameter, i.e. a ratio (T/D) of 0,116 to 0,069 for the large mill. However the design stress levels at the trunnion/head transition in the case of the large mill are almost 250% of those in the small mill.

2018-4-17 · Mill Sizing: After laboratory and pilot plant testing confirm the feasibility of autogenous or semi-autogenous grinding, it can be used to establish the exact grinding circuit and mill size the pilot plant tests, the tare power of the pilot plant mills should be determined before and after each test run. The tare power should be for the empty mill.

SAG mill throughput as a function of grate open area As shown in Figure 2 the grate open area has a strong effect on Sossego SAG mill throughput. The nominal capacity of the circuit should be achieved with a combination of 13.5% ball charge and 10.8% open area with 3 and 3…

The mills were selected on the basis of two milling trains, each comprising the largest SAG and ball mills currently proven at other operations, at the time of design. On that basis, a 28 MW SAG mill (internal diameter of 12.19 m (40 ft)) and a 22 MW ball mill (8.53 m internal diameter (28 ft)) were selected for each milling train.

The "Critical Speed" for a grinding mill is defined as the rotational speed where centrifugal forces equal gravitational forces at the mill shell''s inside surface. This is the rotational speed where balls will not fall away from the mill''s shell. Result #1: This mill would need to spin at RPM to be at critical speed. Result #2: This mill''s ...

2013-12-22 · SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING ... The diameter of the trommel for the 34-foot mill is 13.5 feet and the screen surface length is almost 13 feet. This gives us about 550 square feet of screen area, for roughly 30,000 tons a day or 1,300 tons an hour. These trommels were

2020-11-25 · The primary ball/SAG mill discharge is one of the most severe duties in mineral processing. The suction wearplate ... (3.2 mm) in diameter. A wide range of natural and synthetic elastomers is available to handle ... FEET 10 FLOW – M3/h 0 5 15 10 25 20 30 35 45 40 50 55

2014-12-18 · Mill Pulp Trommel Free Flow by Free SAG Plant Diameter, feet Diameter, feet Long, feet Flow, m 3/h Area, m 2 Area, m 2 Area, m 3/m 2/h C.M.D.I. Collahuasi 32 14,4 13,6 935 57,0 15,4 61 Minera Los Pelambres 36 15,9 16,4 2.063 75,9 19,7 105

2016-6-6 · Traditionally, the number of shell lifters used in a SAG mill is equal to twice the number of the feet in the mill shell diameter (e.g., a 34-ft-diameter mill shell would have 68 shell lifters). This is also called a 2-D shell lining. Eliminating some shell lifters increases the volume of charge between the lifters

2009-7-30 · 8-3 Centrifugal force outward Fc mp& 2 Dm 2 (8.1) & is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill inside the liners. Gravitational force Fg mpg (8.2) The particle will remain against the wall if these two forces are in balance ie.

2007-3-15 · The basic design of the SAG mill is an adaptation of the operating mill at Escondida in Chile. At 38 feet in diameter and 20 feet in length with installed power of 18 megawatts, the Lumwana SAG mill is designed to process 2,450 tonnes of ore per hour with an annual rate of 20 million tonnes per annum. Grinding media will be 200 tonnes of 100mm ...

Cycloconverter For Sag Mill Feet sag mill motor complete statorpermoera concrete requirement for a sag mill foundation 2 CONGA THE WORLD S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL ABSTRACT In 2010 Newmont made the decision to purchase a 42 foot ft Semi Autogenous Grinding SAG sag mill motor complete statorsuperspareco Chat Online . …

2021-7-21 · The SAG Mill has a mill diameter of 24 feet and an Effective Grinding Length ("EGL) of 18.5 feet and a structural charge mass of 315 metric tonnes. The structural design ball charge is 11% with a structural design load volume of 35%. Specific gravity of the material is 2.55. The structural steel liner mass is 240 metric tonnes; however, with ...

Validation speed SAG mill measuring 28 feet in diameter by 11 ft long. The mill 5. Implementation motors are rated at 5,500 HP. At the discharge of each SAG mill is a pair of vibrating screens. The screen oversize material from both SAG mills is conveyed to a shared pebble crushing circuit consisting of two SCOPING Omnicone crushers.

2013-4-12 · ROUND Diameter x Diameter x 2.6729 = Lbs. Per Foot FLAT Thickness x Width x 3.4032 = Lbs. Per Foot SQUARE Diameter x Diameter x 3.4032 = Lbs. Per Foot HEXAGON *Diameter x Diameter x 2.9437 = Lbs. Per Foot OCTAGON *Diameter x Diameter x 2.8193 = Lbs. Per Foot PIPE Actual O.D. - Wall x Wall x 10.68 = Lbs. Per Foot

2018-2-20 · 3) worn 66 lifter set worn with about 45 degree face angle 4) new 66 lifter set, same as example 1, except beginning with rounded particles The mill configuration, in Figure 7, represents a typical 10.4m diameter (34-foot) SAG mill. The image is taken after a representative amount of ore is broken to illustrate key behaviors. Ore breakage rates,

2014-7-17 · the mill builder can provide the gear designer with input power and output speed. The next step is the interface dimen-sions. Since the gear needs to turn the mill, it needs to have a bore larger than the mill outside diameter. The mill out-side diameter is a function of the grind-ing process selected. Autogenous mills are the largest in ...

foot diameter SAG mill was designed to treat 2065tph of monzonite ore at a ball charge of 8% volume, total charge of 25% volume and an operating mill speed of 74% of critical.

The design of the 40-foot diameter SAG mill installed at the Cadia Gold Mine, New South Wales Australia, followed after two years of extensive laboratory and pilot plant testwork. This showed the Cadia ores to be hard and competent necessitating the use of both a variable speed mill drive

2019-11-26 · The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 ~ 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill''s ...

2014-9-10 · Conga: the world''s first 42 foot diameter 28 mw gearless sag mill. In Proceedings of the SAG 2011 Conference, Vancouver, Canada. [10] Meimaris, C. and Lai, W. K. K. L., Fatigue design of mills. Minerals Engineering, 30 (2012). [11] Recent discussions with Siemens. Powered by Pinboard Theme ...

AG - Autogenous & SAG Semi-Autogenous Mill Design Calculatio…

2021-1-10 · Research ORTECH then proposed to run a series of SAG pilot plant tests in the new 3 ft. diameter Starkey-PRO* pilot SAG mill to test the responses to the proposed plant changes. *Patent applied for. The new SAG mill was created by replacing the shell on a 3 ft. diameter by 2-½ ft. ball mill with a new spool piece.

2021-2-17 · 1 CONGA: THE WORLD''S FIRST 42 FOOT DIAMETER 28 MW GEARLESS SAG MILL T. Orser1, V. Svalbonas 2 and *M. Van de Vijfeijken 3 1Newmont Mining Corporation 10101 East Dry Creek Road Englewood, CO 80112, USA 2 Corp. 2715 Pleasant Valley Rd.

2021-1-11 · by volume load. Recent studies in the three-foot diameter SAG mill are instructive. The following graph shows the relevant facts as Figure 2. Figure 2: Pilot Plant kg/hr Vs Charge % by Volume This data is indicative of trends that were happening in the 3-ft. diameter SAG pilot mill. They have not been proven in large commercial scale mills.

When size really does matter. world''s largest ball mills with 14 megawatts of installed power. To put its size into perspective, the ball mill will span a width of 7.3 …

2021-9-14 · of the SAG mill is transferred onto a vibrating screen. The oversize material is crushed in a pebble crusher, and the undersize is combined with the ball mill (6.71 × 9.91 m) discharge and sent to the cyclones. The SAG mill in phase 1 uses two 4100 kW synchronous motors and works with a constant 10.5 rpm rotational speed in two

2020-3-22 · ball mill model. This ball mill and rod mill power draw model is based on a torque model and empirical measurements made by the Equipment Company for use by its sales representatives to size grinding mills. Slight differences in the equations used allow rod mills, dry ball mills and wet overflow and grate ball mills to be sized.