The conceptual design targets a grind size P 80 of 65μm, utilizing a SAG size of 6.7 m diameter by 2.8 m (EGL) long and a ball mill size of 4.5 m by 7m (EGL) long. The SAG mill is closed-in with ...
Gearless mill drive (GMD) technology has further expanded the use of large AG milling allowing Outotec to produce the world's largest SAG mill of 42' in diameter drawing power at 28 MW. Today, Outotec is the world leading supplier of gearless AG mills operating globally.
Details of the complete SAG Mill package. 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 plus ½" mill product was crushed in a cone crusher and returned to the mill feed along with the minus ½" plus 4 or 6 mesh fraction. Tests were run with a short mill, inside length of 26-3/8″, or diameter-to-length ratio of 2.50 to 1. The same mill was then lengthened to 48-3/8″, diameter-to-length ratio of 1.36 to 1. Test Conditions
the ratio of mill diameter to mill length EGL is important as it affects selection of the rated speed. The progress of moving to larger diameter SAG mills with decreasing D:L ratios is illustrated in Figure 1. As indicated, these progressive delays in the use of larger diameter mills (please see in the next paragraph) have coincided with a
Tumbling mills for size reduction with either steel rods (rod mills) or balls (ball mills), or sized ore (AG & SAG mills) as the grinding media used depending upon the size and energy considerations.
A 9.75m ø x 4.88m EGL SAG mill is proposed for the primary grinding duty. The SAG mill will operate with a ball charge of 5% for first 24 months on soft ore and then 5-10% thereafter (70 to 105 mm for first 24 months and then 105 and 125 mm balls thereafter). Total charge will be 22- 30%, with an expected pinion power draw of 6.8 MW.
SAG mill. SAG 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.
egl definition for sag mill. The Science of Comminution- egl definition for sag, Ball Mills 11, surface This means that the principal stress range,, grinding, Electrolytic coating lines. Live Chat. Difference between electrolytic AC and DC marking.
SAG mill was installed with a fixed speed motor, however the possibility to retrofit a variable speed drive with limited speed adjustment, if found to be necessary, was allowed. The final process flowsheet is shown in Figure 2. OMC ARM FDW TABLE 6 SAG Mill No. of 1 1 1 Final Mill selection. Diameter m 9.75 10.37 10.37 Length m 4.27 4.87 4.42 ...
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 ...
Details of the complete SAG Mill package. 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 Bond rod mill grindability test is performed similarly to the ball mill test. The feed sample is stage-crushed to ½" (12.5mm) and the test is run under a circulating load. The test can also be closed with various sieve sizes, but for AG/SAG mill analyses the standard 14-mesh (1.18mm) sieve is typically used. The rod mill work index is
TON will design and supply the world's largest SAG Mill. It is situated near the Newmont Yanacocha gold mine, where TON installed what was then the world's largest single-stage SAG mill, a 32 ft x 32 ft (9.75m x 9.75m) EGL mill, driven by a 16.5 MW ABB gearless motor, in 2008.
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A ball mill is a type of grinding mill, purposed similarly to the sag mill or other mining crushers. These machines are used to grind or mix metals or raw materials for further processing. Various materials are placed into the mill drum and rotated with the …
working of ball mill and sag mill – SRM Mining Machines …. How Does A Sag Mill Work | Crusher Mills, Cone Crusher, Jaw …. Bond Ball Mill Work Index, kWh/t SAG kWh/t from 152mm to T80 1.7mm Up to 2007 2008 Data ….
Morila capital expenditure ($43mn) – including SAG mill refurbishment, plant expansion, infrastructure upgrades, mobile equipment, critical spares and TSF lift and capacity expansion; Morila resource definition and regional exploration ($14mn) – including following up high-grade intersections outside the pit design, as well as geophysics on ...
Morila capital expenditure ($43 million) including SAG mill refurbishment, plant improvement, infrastructure upgrades, mobile equipment, critical …
The SAG mills will be fed by one of three coarse ore reclaim conveyors. Process water will be added at the mill feed in order to produce a SAG mill discharge slurry density of about 75% solids by weight. Each mill will be 12.8 m diameter with an 8.8 m effective grinding length (EGL) and will have a 28 MW variable speed gearless drive ring motor.
SAG mill inefficiency factor 1.35 15 B Circulating load % 400 5 A Sag Mill Type Morgardshammar 8 C Mill shell length flange to flange m 6.8 8 B Mill shell length (EGL) m 6.2 8 B Mill diameter (ISL) m 5.04 8 B Calculated pinion …
Ore is crushed in-pit, in three semi-mobile gyratory crushers. Overland conveyors feed two secondary crushers, and two mill trains each consisting of a 40 foot diameter 28 megawatt SAG mill twinned with a 44 foot length 22 megawatt Ball mill. The grinding mills are amongst the largest of their type currently operating in the world.
This is then added to the downstream EGL value in column 23 to find the upstream EGL elevation (column 24): The manhole rim elevation of 4,505.0 feet is above the EGL of 4,503.6 feet, so this reach is acceptable. Step 8. In a new row, enter stations "2" and "4" in columns 1 and 2. Enter data in columns 1 through 9.
AG/SAG mill based circuits and this has impacted on the ability of companies to obtain funding. Bailey et al. (2009) published guidelines on the use of typical SAG mill-based circuit design methods, with particular focus on the use (and misuse) of JKSimMet. A follow up paper by Lane et …
Egl Definition For Sag Mill. Egl definition for sag mill -china coal mining processing plant in nigeria this coal mining project is an open pit mine located in nigeria, announced by mining company western goldfields that it has discovered 62,400,000 tonnes of. Chat Online; Simple Modulators For Solid
However, there are cases, usually related to AG/SAG mills, where the quoted EGL may refer to the flange-to-flange length. If the mill has conical ends then the angle of the cones needs to be input. If there are no cone-ends then zero degrees for the cone angle should be input. Note that the model assumes that both ends of the mill are the same.
The order comprises a 22-foot diameter by 8-foot effective grinding length (egl) SAG mill and 14.5-foot diameter by 19.5-foot effective grinding length ball mill. Both mills will be driven by 2000 KW, low speed synchronous motors at 78% critical speed. The mills will be supported on 90-inch diameter hydrodynamic trunnion bearings which will be ...
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 ...
Optimization of mill performance by using online ball and pulp measurements Soon after a stop, a mill is a dangerous place to enter for the personnel tasked with taking measurements or
Blank spreadsheet that is pre-populated with the field names needed to import laboratory test results into the SAGMILLING circuit model testwork database (subscription required). Enter your test results, one per row, arranged into the columns indicated. To import into your testwork database, copy the block of cells starting with the top row ...
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