sizes of sag mills

What s the difference of Ball mill SAG mill AG mill

Attrition mill is a type of grinding mill by kinds of media to crush lump to powder like substances 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.

Different types of grinding millsStrikingly

SAG mill SAG is the short form of semi autogenous grinding The difference between autogenous and SAG mills is it uses balls to grind like ball grinding mill SAG mills have built in lifting plates inside the drum When the drum rotates the lifting plates lift the materials and the balls to the top and release them back to the surface.

Semi autogenous grinding SAG mill liner design and

Semi autogenous grinding mills SAG mills are tumbling mills that most commonly have a shell diameter to length ratio of around two With this high aspect ratio SAG mills generate both thrown and cascading ball milling actions with shell linings shaped to lift and to throw alloy steel grinding balls of up to 150 mm 6 in in diameter These

AMIT 135 Lesson 6 Grinding CircuitMining Mill

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

A comparison of SAG mill power models

varying it as the mill water addition rate changes Loveday/Barratt Model Brian Loveday published a simple SAG mill model Loveday 1978 of the form in Equation 2 The equation uses mill dimensions inside the liners the density of the mill charge and an empirical power number that encapsulates the mill speed and volumetric filling.

TOWARDS HIGH FIDELITY SIMULATION OF SAG MILLS

SAG mill design and optimizationdecouples contributions of ore and grinding environmentdescribes each breakage mechanism in AG and SAG mills over a wide range of sizes and collision energiesdescribes mechanistically the effect of mill design and operating variables.

SAGMILLING Mill Critical Speed Determination

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 100 critical speed Result #2 This mill s

Modelling Transfer size limitsSAGMILLING

The model assumes all SAG mills are variable speed if a fixed speed mill encounters this condition it will completely grind out and operators will probably be forced to stop the SAG mill Pick your mills sizes to avoid secondary mill limited conditions This transfer size is NOT a prediction

PDF LARGE DIAMETER SAG MILLS NEED LARGE

In the case of autogenous AG and semi autogenous SAG mills this has provided a significant challenge to modellers due in part to the interaction between feed characteristics and mill

AG millsMetso Outotec

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.

Semi Autogenous Grinding SAG Mill Liner SupplierEB

The general advantages in Semi Autogenous Grinding SAG Mill Liner are as follows In the recent 20 years our liners have been widely used in large medium and small ball mills in Chinese power generation mining cement chemical engineering and metallurgical industries and super fine

SAG millsMetso Outotec

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

Optimization of a SAG Mill Energy System Integrating

An optimization is carried out to minimize the yearly cost of energy for the operation of the SAG mill This cost includes the energy consumption cost in /kWh and the capital cost for the PV BESS infrastructure prorated over the life of the battery system accounting for the discount rate through an annuity factor Pamparana et al 2019a b .The energy requirements are defined by the SAG

SAGMILLING Mill Critical Speed Determination

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 100 critical speed Result #2 This mill s

Optimizing your SAG mill operationInternational Mining

Similar to the impeller design affecting pump capacity the pulp lifter design affects the discharge capacity or mill throughput of AG and SAG grinding mills 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 .

CONGA THE WORLD S FIRST 42 FOOT DIAMETER 28

sizes The results of these studies showed that a single line 40 ft SAG mill circuit gave the best project economics Further work was followed up to optimize the 40 ft SAG mill size with the results showing that a slightly more expensive 42 ft SAG mill with equivalent power to the 40 ft SAG mill enhanced the project economics After assessing

O I SKARIN N O TIKHONOV CALCULATION OF THE

Decision making on selection of SAG mills increasingly uses the methods of sizing the milling power based on laboratory tests on grindability of minerals This article considers one of such methods allowing determination of mill characteristics based on the Bond work indexes of crushing rod milling and ball milling.

Modelling of the Performance of AG/SAG Mills

This device is able to accomodate particles in the size range 10 100mm ie covering the range of sizes typically found in the grinding media of ag and sag mills It is used to measure the product sizes from breaking rocks in this size range at a range of specific energies.

The Science of Comminution

Standard Sizes 20Pebble Mills 2122 CHAPTER 7 FULLY AND SEMI AUTOGENOUS AG AND SAG MILLS 22High Aspect vs Low Aspect Mills 22Mill Sizing Consideration 23Breakage Rate/Population Balance Model 23Power Model 23Application information 24ABC and SABC 24

SAG vs Ball MillsCOMESA

The accumulation of material inside the mill elevates the filling level and consequently produces an increase in motor energy The final outcome is that the overall energy available for each ton of processed material remains constant without affecting the distribution of product sizes Disadvantages of SAG Mills

PDF Influence of feed size on AG SAG mill performance

When the feed size of a SAG mill becomes coarser These samples were ground with hammer mill having different screen aperture sizes 1.5 1.2 and 0.7 mm and feed rates 18 14 10 kgh 1 at

Pearlite Alloy Steel Casting For Large SAG Mill DF074

SAG Mill Material Steel Dimensions As Per Drawings Hardness HRC33 42 HB310 390 Microstructure Predominantly Pearlite Dimensional Checking Gauging 100 Check Material Grade AS 2074 L/2B Surface Finish Visual Inspection After Shot Blasting

Autogenous and Semi Autogenous Mills FL

Rely on our proven track record of SAG and AG Mill superiority Since the early 1980s we have been designing and manufacturing Semi Autogenous SAG and Autogenous AG Grinding Mills under the Fuller Traylor brand Semi autogenous grinding uses a minimal ball charge in the range of 6 15 while autogenous grinding uses ore only SAG

SAGDesign Test Starkey and Associates Inc.

The SAG mill pinion energy W SDT kWh/t and SAG discharge Bond ball mill work index S d BWI kWh/t are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.

AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

5 Low ball charge SAG mill high mill speed 4 ball charge 90 Nc A cross between AG and SAG for competent abrasive ores As typically operated in RSA 6 SAG mill configurations 3 and 5 with recycle crusher Competent ores better suited to coarse grind sizes as circulating loads can be high 7 SAG mills treating partially or fully

INFERENTIAL MEASUREMENT OF SAG MILL

semiautogenous grinding SAG mills and is the last in a five part series on Inferential Measurement of SAG Mill Parameters Inferential measurements of SAG mill discharge and feed streams and mill rock and ball charge levels detailed earlier in the series are utilised in a simulation environment.

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Wet millSAGMetso Corporationhorizontal

Versatile applications 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

Mills Products CEMTECCement and Mining Technology

AG and SAG mills can be designed for dry or wet grinding The bearings are hydrostatic slide or slide shoe bearings Usually AG and SAG mills have a gear rim/pinion or direct drive Our p rodu ct portfolio includes sizes from a laboratory scale to a diameter of 10 meters or more For transport reasons these mills consist of several flanged parts.

sag mill estimation hogg amp fuerstenau model

Problems 9.1 In an SAG mill the dimensions of the mill were 9.75 m 3.5 m and the specific gravities of the mineral and Get Price AN UPDATED DATA SET FOR SAG MILL POWER MODEL The SAG mill model by proposed by Leonard Austin 1990 was largely based on modifications of earlier tumbling mill models by Hogg Fuerstenau and F Bond.

AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

Other sites include Leinster Nickel Operations initially with an AG mill then SAG 9.6 m dia x 5.64 m EGL 8 MW The Cannington lead zinc mine SS SAG 8.5 m dia by 4.5 m EGL 5.8 MW The Kambalda Nickel Concentrator 7.93 m dia x 4.93 m EGL AG Mill 3.5 MW with recycle crusher.

What s the Difference Between SAG Mill and Ball Mill

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.

Sag Mills And Ball Mills PdfFact Jeugd Noord

That is the sag mill produces about 10 more than the ball mill in the final producthe average consumed energy at sag and ball mills to produce one ton of final product was 23 kwht and 36 kwht respectivelyhus the ball mill consumes 12 kwht more energy than the sag mill in producing the final product 1 X Fls Sag Mill Exclotordrive