The SAG mill had a 68% ball charge and the power consumption was 8 kWh/t, which agreed well with the expected value. 9.6. Problems. 9.1. In an SAG mill the dimensions of the mill were 9.75 m 215; 3.5 m and the specific gravities of the mineral and that of the balls charged were 4.1 and 7.9, respectively.

Live Chat750 HP. In the four decades since Taggart, ball mill diameters have increased to about 18ft8 I U 8 andmore recently to 21ft29 and 5000HP, and autogenous mill diameters to 36ft and 10,000HP. Unfortunately, complete data are not readily available. A suggested questionnaire is provided for the systematic collection ofpower related data for detailed

Live ChatLARGE DIAMETER SAG MILLS NEED LARGE DIAMETER BALL MILLS WHAT ARE THE ISSUES? same mill dimensions and operating conditions. This contrasts with crusher ball mill ag/sag mill ball mill.

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Live ChatAn updated data set for sag mill power model calibration This paper expands the SAG mill survey database published by the Author at Procemin 2013. The new database includes 49 published SAG/AG mill surveys and includes mills from all over the world.

Live ChatThe Effect of Grain Size on Ball Mill Work Index The Bond ball mill work index is the most commonly used comminution testwork procedure in the Millpower 2000 database, with more than double the number of results of the second most common (the combined drop weight test methods). The ball mill work index is defined as the kW hr per ton to

Live ChatPictures of the insides of an AG mill and a SAG mill which have been crash stopped are shown in Figures 5 and 6 respectively. Accurate measurements of the ball filling can only be made after the mill is ground out. In this case the mill is operated with the feed turned off until all of the ore has exited the mill.

Live ChatAG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill/ball mill circuit.

Live ChatJun 22, 20040183;32;The ball mill also provides representative samples of ore suitable for further testing e.g. studies of leaching and concentration of the ore. The ball mill of the present invention will be referred to herein as a semi autogenous grinding (SAG) mill, to distinguish over ball mills known in the art. BACKGROUND TO THE INVENTION

Live ChatLARGE DIAMETER SAG MILLS NEED LARGE DIAMETER BALL MILLS WHAT ARE THE ISSUES? From 2.1mm to the final grind size the ball mill work index should be . the same

Live ChatAG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill ball

Live ChatBall Mill Recirculating Load 27 SAG Mill Load Control 28 Mill Power Indication 28 the required dimensions of the grinding chamber, is shorter overall. This in turns allows for smaller, 10 MW shell supported mill consumes the same foundation space as a 5 MW mill supported on

Live ChatAn updated data set for sag mill power model calibration This paper expands the SAG mill survey database published by the Author at Procemin 2013. The new database includes 49 published SAG/AG mill surveys and includes mills from all over the world.

Live ChatFeb 26, 20130183;32;AG/SAG mills can accomplish the same size Often the product can be finished size or ready for final grinding in a ball mill or pebble mill . They can grind

Live ChatComparison of DEM and experiment for a scale model SAG mill. Fig. 1 shows the cross section of the numerical model of the mill having the same dimensions and lifters as the experiments. The particles are chosen to have the size distribution described above. R.K Rajamani, B.K MishraDynamics of ball and rock charge in SAG mills. Proc. SAG

Live ChatDESIGN OF AG/SAG MILL CIRCUITS USING THE SMC TEST. have approximately the same energy efficiency. The fact that this (SAG) and ball mill circuits are used to show that Bond's equation does

Live Chatcan be used in a relative manner to compare the expected behaviour of different ores in AG/SAG milling in exactly the same way as the Bond laboratory ball mill work index can be used to compare the relative grindability of different ores in ball milling (Bond, 1961 and Rowland and Kjos, 1980)

Live Chatsag mill for copper . Ok Tedi Mine . The mill operates two ball mills and one sag mill. Copper concentrate is produced as slurry and piped 137 km (85 mi) along the Kiunga Tabubil Highway to Kiunga, the main port of the district, where it is shipped via river barge along the Fly River.

Live ChatSep 23, 20140183;32;Most of our work since 2000 has been in developing grinding mill foundations to avoid vibration and unacceptable deflections. On a recent project for a plant in Peru, the client was told by the mill vendor that there was no need to do a systems (dynamic) analysis on the mill foundations because the mills on that project were gear driven rather than being driven by ring motors (gearless drives).

Live Chatability to adequately clamp the liner to the mill shell. Consequences can be the same as for a too loose bolt. Loose bolts will also allow ground material to work between the liner and the mill head (or shell) and make it impossible to properly re tighten the bolts. If this happens, the liner must be removed, mill and

Live ChatFor AG/SAG mills pebble porting allows the critical size rocks to be withdrawn from the mill and crushed using in circuit recycle crushers or crushed and re routed to the ball mills if there is

Live ChatAG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill. All because of the range of mill sizes available, AG/SAG milling extends itself to many applications.

Live Chatball mill larger or smaller balls spirosurveycoza. ball mill larger or smaller balls Ball mill , the free encyclopedia A ball mill is a type of grinder used to grind materials into extremely fine powder for use in mineral dressing processes, paints, pyrotechnics, ceramics and Chat; Ball Mill eBay. Get price

Live ChatDec 06, 20150183;32;The impact can be rock on rock such as in an Autogenous Grinding (AG) mill, rock and a small ball charge (~10%), used in Semi Autogenous Grinding (SAG) mills, balls of various sizes in Ball Mills and less commonly these days, steel rods in Rod Mills.

Live ChatPictures of the insides of an AG mill and a SAG mill which have been crash stopped are shown in Figures 5 and 6 respectively. Accurate measurements of the ball filling can only be made after the mill is ground out. In this case the mill is operated with the feed turned off until all of the ore has exited the mill.

Live Chatperhaps three or four, have the capability of three dimensional grinding mill simulation, yet it is available only to specialist who can handle the complex tasks to run the codes. As a result the 3D codes are not prevalent in the hands of mill managers, metallurgists, mill design teams, and operators.

Live ChatTECHNICAL NOTES 8 GRINDING R. P. King. 8 2 amp;ROOLVLRQ This energy is required to cause grinding of the material in the mill. The shape and dimensions of the lifters control the tumbling action of the media. The liner profile and the stickiness of the pulp in the mill can have a significant effect on the actual critical velocity.

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Live ChatKeep your business rolling Mill Lining Solutions Mill linings, mill trommels and trunnion linings. 2 Different lining types can be combined in the same mill to achieve optimal performance. Rubber mill linings involve precise dimensions and close tole rances, so that every mill lining from

Live ChatSAG is an acronym for semi autogenous grinding. SAG mills are autogenous mills that also use grinding balls like a ball mill. A SAG mill is usually a primary or first stage grinder. SAG mills use a ball charge of 8 to 21%. The largest SAG mill is 42' (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor.

Live ChatSAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.

Live Chatis composed of individual poles mounted on the mill flange. The number of poles is based on the required speed of the mill. Thus, the SAG mill motor has 72 poles and the ball mill motors have 56 poles. Excitation transformer and excitation converter with full wave control. The excitation transformer is

Live ChatThe SAG mill had a 68% ball charge and the power consumption was 8 kWh/t, which agreed well with the expected value. 9.6. Problems. 9.1. In an SAG mill the dimensions of the mill were 9.75 m 215; 3.5 m and the specific gravities of the mineral and that of the balls charged were 4.1 and 7.9, respectively.

Live ChatBall Mill Recirculating Load 27 SAG Mill Load Control 28 Mill Power Indication 28 the required dimensions of the grinding chamber, is shorter overall. This in turns allows for smaller, 10 MW shell supported mill consumes the same foundation space as a 5 MW mill supported on

Live Chatof the SAG mill down, insert in circuit crushers, and complete the comminution process with large ball mills where total ball mill power can be up to double the SAG mill power. Scandinavian and southern hemisphere SAG mill designers have built grinding plants using low aspect (1/1) ratio SAG mills to produce a finished grind in a single stage.

Live ChatThe ball mill gear/pinion efficiency is the same as for a SAG mill. For a gear driven ball mill, use the following Total Ball Mill Motor Power = (Ebm 215; tonnes/hour) 247; 0.985 247; 0.94 ( 10 ) The largest motor sizes currently on the market with pinion and gear drives are in the 10 MW range (these would be a twin motor arrangement with one motor

Live ChatKeep your business rolling Mill Lining Solutions Mill linings, mill trommels and trunnion linings. 2 Different lining types can be combined in the same mill to achieve optimal performance. Rubber mill linings involve precise dimensions and close tole rances, so that every mill lining from

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