applied to the pilot plant data when selecting the SAG mill shell and motor size. Upon resolution of issues related to the mill motor and lifter design, the project only just managed to achieve the target throughput of 17 Mt/y (Figure 1). The contributing factors to higher than expected SAG mill specific energy (lower throughput) were:

The mill has an unfavourably close liner spacing, with 40 rows of liners in an 18ft mill. The SAG mill drilling would conventionally be 34 rows, and this is too many ( Powell et al, 2006). These ...

pressure on mill sizing has resulted in non-flexibility in new SAG mill circuit designs. In order to defend the mill size selected, the owner's engineers need to be able to quantify the loss in productivity that will occur if the SAG mill is downsized. Power based methods allow this calculation to be executed rapidly with good accuracy.

SAG mill and two ball mills in closed circuit with cyclones. Two pebble crushers treat the SAG mill discharge trommel screen oversize material. The crushed product is combined with the SAG mill feed. Project economics dictated maximum throughput through a single line comminution circuit. Hence the selection of some of the largest

AG/SAG/Ball Mill Sizing Gross Power Draw and Specific Energy Calculator for Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG) and Ball Mills. Exit Mill Calculator. …

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 …

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ABSTRACT. In 2010 Newmont made the decision to purchase a 42 foot (ft) Semi-Autogenous Grinding (SAG) mill from and a 28 Mega-Watt (MW) Gearless Mill …

secondary mill power that permits the range of vari- ability samples to be processed according to whether a "SAG Mill limiting" condition, i.e., harder ore, or a "Ball Mill limiting" condition, i.e., softer ore exists. For example, a ratio of 1:1.5 or up to 1:2 would indicate a trend away from processing harder ore types and

sbm egl definition for sag millGROSS POWER CALCULATOR SMC Testing 2018426&ensp·&enspGROSS POWER CALCULATOR General However,there are cases,usually related to AG SAG mills,where the quoted EGL may refer to the flangetoflange length.If the mill has conical ends then the angle of the cones needs to be …

sag mill egl definition – Crushing Plant | Grinding Mill. With good definition for the design power level …. SAG mill is an investment that can produce …. •Size of SAG mill = 36 ft diameter by 15.0 ft long (EGL).

only installed a 22 MW SA G mill for a feed rate of 60 000 t/ d, equating to a maximum SAG mill specific energy of approxim ately 8 kWh/t. Figure 8 – Comparison of A x b of data adapted from ...

SAG Mill Grinding Circuit Design AG and SAG mills are now the primary unit operation for the majority of large grinding circuits, and form the basis for a variety of circuit configurations. SAG circuits are common …

The larger units can also be matched with the SAG mill in SAB/SABC configuration. Stirred mills (Regrinding). Finer regrinding or ultra-fine grinding is a frequent requirement in pilot plants and ALS has a range of units that can run continuously in pilot applications. The following mills are located at Balcatta: ISAMill tm, Deswik, and ...

EF5BM=[ P80+10.3 1.145×P80] ( 3 ) The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used to calculate the optimal feed size) and because this is a "single-stage ball mill" calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies …

Inventory ID: 6C-MI02. UNUSED OUTOTEC 24' x 17' (7.3m x 5.2m) EGL SAG Mill with 6,300 HP (4,750 kw) Variable Speed Drive

SAG mill A SAG mill is almost always a high-impact application. Hence, it is wise to use tough, impact-resistant materials that are somewhat softer but less brittle to avoid cracking, chipping, or breaking. Rubber/steel composite liners are often a good choice as is the range of more impact-resistant cast alloys. Rod mill As there should be very

(EGL) SAG mill driven by a 24,000 kW gearless drive. The SAG mill feeds two FL ball mills each 26 ft. in diameter × 40 ft. long (EGL), each driven by a 16,400 kW drive. …

The SAG mill will be a single pinion low aspect mill, operating in a closed circuit. The mill has an inside diameter of 3.8m and an effective grinding length (EGL) of 5.0m. The mill receives coarse ore and process water at a variable flowrate to achieve the correct pulp density. Lime and zinc sulphate are also dosed to the SAG mill to condition ...

AG/SAG/Ball Mill Sizing Gross Power Draw and Specific Energy Calculator for Autogenous Grinding (AG), Semi-Autogenous Grinding (SAG) and Ball Mills. Exit Mill Calculator. Shell Sizing Parameters ... Shell Heads Cone Angle: [degrees] Effective Grinding Diameter: [m] Effective Gringing Length (EGL): [m] Operational Speed %Critical: [%] [rpm ...

The discharge of the SAG mill goes to a vibrating screen with the openings of 5 mm. The oversize material is recycled to the SAG mill and the undersize is combined with the ball mill (6.71 × 9.91 m) discharge and is sent to the cyclones. The SAG mill uses two 5500 hp synchronous motors and works with constant 10.5 rpm rotational speed in …

High cost-effectiveness CITIC HIC grinding mills are recognized as China's Manufacturing Industry Single Champion Product. CITIC HIC is responsible for setting the national standards of semi-autogenous mills (SAG mills) and ball mils, supported by powerful database, optimized process technology, cutting-edge design concept, and 60 years of …

Context 1 ... is highly recommended that mills should be designated by inside shell diameter times inside shell length following with the length inside liners (effective grinding chamber length) in...

As a result of this work, S&A recommended the selection of a 24 ft diameter by 14 ft EGL single stage SAG mill (4.6 MW installed power) to produce 3,000 mtpd. The circuit was to be expanded in later mine life through the addition of an 18 ft diameter by 29.5 ft ball mill (also 4.6 MW installed power) in order to double the throughput. KEYWORDS

The first SAG mill to utilize a GMD motor design were the two 32' x 17' (1 5' EGL) - 8,2 00 kW SAG mills sold to Chuquicamata in Chile in 19 86. Until today, a total of 72 GMD SAG mills have ...

As semi-autogenous (SAG) mills become increasingly larger in size, the design of SAG mill liners has been more and more important, and the appropriate liners would enhance mill ... For example, the initial SAG mill liner was installed using Hi-Hi with a 6. o . contact angle. Mill throughput increased by 11% after the face angle had been …

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This paper presents the technical details of the world's first 42 foot diameter 28 MW gearless SAG mill, installed at the Conga copper-gold project in Peru. It explains the challenges and solutions for designing and operating such a large mill, and how it delivers high efficiency and low maintenance costs.

This paper discusses, and is centered on the Appendix of this paper that compiles all Autogenous and Semi-Autogenous mill installations worldwide, through the end of March 2015. Updates have been ...

sbm meaning of ser on sag millsSaje Natural Wellness Essential Oils and All Natural Products to keep you feeling better everyday.Shop natural remedies,skin care and home essentials from Saje Canada. ... To identify the definition and importance of a hydraulic lubrication system.To be familiarized with the lubricant and equipment used in ...