Early SAG mills had a diameter of about 32' later increasing to 34 36 38 and 40' At the same time the mill volume also increased Typically a SAG mill has a much larger diameter compared to its length Yet the SAG mill of Newmont's Yanacocha mine in Peru is a single stage mill (no ball mill after the SAG mill

Jan 30 2015The SAG mill is much cheaper than the pulverizer - the latter requiring diamond to build the SAG mill does not Pulverizer also uses a lot more ingots to create Change SAG mill to use something other than flint in recipe? changing the capacitor recipe for the machine frame on the SAG mill may break other machine costs

The SAG mill pinion energy is determined from the SAGDesign™ testwork results as follows W SDT = revs (16 000 + m s)) / (447 3 m s) where W SDT = AG/SAG Specific Pinion Energy from a F 80 of 152 4 mm to a T 80 of 1 7 mm kWh/ton ground revs = Cumulative number of SAG test mill revolutions to 80% passing 1 7mm m s = SAG mill feed sample

SAG milling extends itself to many applications due to the range of mill sizes available They 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 done by a ball mill SAG mills are also an optimum solution for wet grinding since crushing and screening in these

The SAG mill specific energy consumption (E SAG) is calculated using the 1979 Barratt equation and the ball mill specific energy consumption (0 90 = 90% availability) is used to convert t/h to t/d Ball mill Operating strategy when circuit is SAG-limited (note fixed

Amelunxen SGI Model This is a model that estimates the specific energy consumption of a SAG or AG mill plus ball mill circuit using the equation by Amelunxen (2014) for E SAG and the classical Bond work index equation for E ball substituting CF ball in the place of the Rowland efficiency factors The model requires manual calibration factors for both equations (CF SAG and CF ball

Mill speed can be adapted to upstream and downstream processes – avoids overgrinding and optimizes load distribution between SAG and ball mill (Mular Halbe Barratt 2002) Power consumption is influenced by load respectively torque and mill speed This means that further energy can be saved if a mill speed below the rate speed is re-

Generally the discharge from AG/SAG mills consists of one or both of the following components slurry (water and finer particles) and pebbles (20-100 mm) Single stage AG/SAG mills have to handle large amounts of slurry as they are generally in closed circuit with classifiers whose circulating loads reach as high as 400-500%

Introduction This tutorial describes how to set-up and analyze a SAG (Semi-Autogenous Grinding) mill simulation There are 12 short steps that will guide you throughout the tutorial The SAG (Semi-Autogenous Grinding) mill is a machine designed to to grind smaller particles and break larger rocks Particle breakage will not take place during this simulation The main focus is on []

AG/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 A diagram of types of AG/SAG

Difference Between Sag Mill vs Ball Mill mech4study Today we will learn about difference between sag mill vs ball mill A mill is a machine by which solid or hard materials are broken into smaller pieces by means of grinding crushing or cutting This commutation is an essential part of many processes

We assume you are converting between micron and mil You can view more details on each measurement unit MICRONS or MILS The SI base unit for length is the metre 1 metre is equal to 1000000 MICRONS or 39370 078740157 MILS Note that rounding errors may occur so always check the results Use this page to learn how to convert between microns

A SAG mill with a 44' (13 4m) diameter and a power of 35 MW (47 000 HP) has been designed Attrition between grinding balls and ore particles causes grinding of finer particles SAG mills are characterized by their large diameter and short length as compared to ball mills

The mill charge volume has a great impact on grinding efficiency For efficient grinding autogenous (AG) and semi-autogenous (SAG) mills need to be operated with the correct charge in order to maximize their throughput while avoiding overloading The Outotec MillSense sensor system gives a precise indication of the mill charge volume

The SAG mill pinion energy is determined from the SAGDesign™ testwork results as follows W SDT = revs (16 000 + m s)) / (447 3 m s) where W SDT = AG/SAG Specific Pinion Energy from a F 80 of 152 4 mm to a T 80 of 1 7 mm kWh/ton ground revs = Cumulative number of SAG test mill revolutions to 80% passing 1 7mm m s = SAG mill feed sample

(EGL) SAG mill driven by a 24 000 kW gearless drive The SAG mill feeds two ball mills each 26 ft in diameter 40 ft long (EGL) each driven by a 16 400 kW drive The SAG mill is one of the largest volumetric capacity SAG mills in the world and represented the first 40 ft SAG mill in Peru (Garcia Villanueva 2013 [1])

SAG mill and how the vibration response and hence mill operating conditions vary as a function of time including converter The use of this accelerometer enabled a redesign of the housing and led to a module of reduced size and enhanced ruggedness These new accelerometers in conjunction with the redesigned housing proved to be

of the complete SAG mill unit including foundation mill bearing as well as the electric motor The analysis was also exchanged reviewed and discussed with independent specialists Design Of Converter And Control System The basic circuit of the converter is a cyclo-converter in 12 pulse configura tion It has been selected considering low

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach When future tonnage is to be increased the SAG Mill can feed downstream ball milling to boost capacity Fuller-Traylor SAG/AG Mills range in size from 4 3m through 12 2m in diameter with powers as high as 28 000 kW

Sag Mill Example To illustrate the power of fuzzy logic we will next look at its application in controlling a typical sag mill circuit as is shown in Figure 2 Figure 2 Typical Sag Mill Configuration as Defined in KnowledgeScape An example of controlling SAG mill speed will be

Jul 31 2017There are several SAG mill specific design tests available to determine the amenability of an ore to SAG milling and the resultant SAG mill specific energy Recent projects that have failed to achieve design throughput have typically failed to take sufficient heed of the indications of ore competency in the test work data or analysis of the data

Aug 21 2020Converting from milliliters (mL) to grams (g) is more complicated than plugging in a number because it converts a volume unit milliliters to a mass unit grams This means each substance will have a different formula for conversion but they never

Introduction This tutorial describes how to set-up and analyze a SAG (Semi-Autogenous Grinding) mill simulation There are 12 short steps that will guide you throughout the tutorial The SAG (Semi-Autogenous Grinding) mill is a machine designed to to grind smaller particles and break larger rocks Particle breakage will not take place during this simulation The main focus is on []

Control of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell M S van der Westhuizen A P Mainza A N 2009)

how to convert a sag mill to a ball mill 2020-05-16 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 Get Price

The SAG mill appeared to be the bottleneck in the flowsheet as the power in the SAG was consistently high and approaching the full motor power while the ball mills were consistently operating at less than 75% of installed power Figure 8 - SAG Mill Throughput - metric tonnes per hour Figure 9 - SAG Mill power draw 0 200 400 600 800

to convert the AG mills to SAG mills Simulation of the charge trajectory indicated that increasing the liner lifter face angle from 7 to 30 could provide an appropriate charge trajectory in the SAG mode Installation of the new liners and conversion of AG mill No 2 to SAG mill

Aug 25 2004We have an application in a SAG Mill where we have installed an electronic ear in order to listen the noise produced by the balls falling to the bottom of the mill Our idea is to convert the amplitude and frequency of noise to a 4-20mA signal (or something else) in order to determine if the ball is crushing the mineral or the mill lining

A Ball Mill Critical Speed (actually ball rod AG or SAG) is the speed at which the centrifugal forces equal gravitational forces at the mill shell's inside surface and no balls will fall from its position onto the shell The imagery below helps explain what goes on inside a mill as speed varies Use our online formula The mill speed is typically defined as the percent of the Theoretical

SAG mill and how the vibration response and hence mill operating conditions vary as a function of time including converter The use of this accelerometer enabled a redesign of the housing and led to a module of reduced size and enhanced ruggedness These new accelerometers in conjunction with the redesigned housing proved to be

AG/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 A diagram of types of AG/SAG

Determine the sag of a surface based on radius of curvature and diameter Related Product Category Optical Lenses View All Now Was this content useful to you? Thank you for rating this content! Need a Quote? Add a stock number to begin our two-step quote process start now

Feb 01 20123 5 Converting AG to SAG milling and grinding performance An important prerequisite to convert AG to SAG mills was to assure that the mill fillings was above 20% On two occasions the mill was crash stopped and the fillings were found to be 22 and 26% To provide 5% (v/v) balls 21 t balls with sizes and amounts shown in Table 2 were added

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