Online chatWe have over 30 years of experience.

### OUTOTEC GRINDING TECHNOLOGIES

singlestage SAG mills to the largest mill in the world – with a 40foot diameter and 28 MW of motor power. Ball mills Ball milling is the most common appliion for horizontal tumbling mills. Outotec offers a full range of ball mills to suit a wide variety of duties, from a few hundred kW all the way up to 20 MW and beyond. Rod mills

Get price### Estimate Mill Steel OR Rock Charge Volume

This is a 2nd Method for estimation or measuring the steel charge volume inside a mill. If dealing with a full SAG/AG mill, this will give you the rock load%. If you can count liners, you''ll have your answer. The 1st method uses similar parameters.

Get price### calculates the grinding charge of a ball mill Mining

calculates the grinding charge of a ball mill . how to calculate sag mill ball charge – Mining. how to calculate motor kw of ball mill ? Grinding Mill China. Tubular Ball Mills ? Free download as PDF File (.pdf), text file (.txt) or read online for free.

Get price### THE OPTIMAL BALL DIAMETER IN A MILL

The optimal ball diameter in a mill 333 The grinding efficiency of the narrow particle size fractions with ball charge of various diameters has been observed through the constant of milling rate k in the equation of the grinding kinetics law for the first order grinding R=R 0

Get price### SAGMILLING.COM .:. Home

Sagmilling.com is home to a collection of both free and subscriptionbased calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools, including for SAG millball mill circuits, and geometallurgy energy models are available to subscribers.

Get price### O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

to the detailed accounting of ball charge motion. The Introduction gives a description of the proposed approximation of ball charge position in a rotating drum and its dependence on the mill velocity. In what follows, the mathematical apparatus used for the forecasting calculation of capacities of the drum shell and cone is presented.

Get price### Mill (grinding) Wikipedia

SAG is an acronym for semiautogenous 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.

Get price### TECHNICAL NOTES 8 GRINDING R. P. King Mineral Tech

steel balls in a ball mill, or large lumps of ore in an autogenous mill or a mixture in a semiautogenous mill, as well as the slurry that makes up the operating charge. Let Jt be the fraction of the mill volume that is occupied by the total charge, Jb the fraction of the mill volume that is occupied by steel balls and E the voidage of the balls

Get price### Improved Relationships for Discharge in SAG/AG Mills

there has been a shift of emphasis on ball mill optimization to semiautogenous grinding (SAG) mills. In order to optimize this section, the skills to accurately model and understand its underlying mechanisms are required. The literature exposed a clear lack of previous research on the influence and performance

Get price### calculating steel ball level in sag mill

Lets calculate/select/pick a new ball for your SAG mill. Now, lets suppose you have a SAG Mill and Ball Mill that are not drawing full kW Power. The SAG Mill has a "small" circulation load of oversize given be the 3/8″ trommel screen and the 1/2″ x 1 1/4″ discharge grates. The load of 4″ balls in this SAG is "good" but unmeasured.

Get price### Advances in Discrete Element Method Appliion to

Advances in Discrete Element Method Appliion to Grinding Mills 119 to 2D nonspherical to 3D slice to 3D full (Cleary et al. 2003) the prediction of shoulder angle, toe angle, power and vortex center increasingly improved. Obviously, these findings point in the direction of 3D DEM for full scale charge motion plus breakage studies.

Get price### Optimum choice of the makeup ball sizes for maximum

For the same amount of ball charge, the number of balls in the mill decreases as the ball size increases. Thus, the S values are lower for larger balls. However, larger balls are capable of breaking large particles therefore, the size at which the S value becomes maximum, x m, increases as the ball size becomes larger.

Get price### MODELING THE SPECIFIC GRINDING ENERGY AND BALL

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up (Bond''s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)

Get price### The Selection and Design of Mill Liners MillTraj

The Selection and Design of Mill Liners . The second primary function of a liner is to transfer rotary motion of the mill to the grinding media and charge. After all, it is the interface between the mill and the grinding charge. Was generally used for mill liners (AG, SAG and Ball) prior to the movement to higher carbon content steels

Get price### power calculation formula of sag mill

SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42'' (128m) in diameter, powered by a 28 MW (38,000 HP) motor A SAG mill with a 44'' (134m) diameter and a power of 35 MW (47,000 HP) has been designed Attrition between grinding balls and ore particles causes grinding of finer particl SAG mills are characterized by their .

Get price### PAI SAG Mill Training YouTube

Jan 08, 2016 · In this training module, we''ll cover the workings of a semiautogenous grinding mill, or SAG mill, that''s designed to be the first stage of

Get price### Modelling SAG milling power and specific energy

size, ball load, mill speed and % solids will represent the total load. Ball Mill SAG Mill Scw Jb Pc % 6" +1" N/Nc Fresh Feed Water Water Pebble Crusher Screen Cyclones Sump Pump Fig. 1. SABC A/B milling circuit. Scw = solid concentration by weight fraction in the SAG mill feed Jb = balls charge (bulk fraction of the SAG mill volume) N/Nc

Get price### How can one select ball size in ball milling and how much

How can one select ball size in ball milling and how much material should be taken in mill pot? of total ball weight. If the quantity of charge is very less then milling balls will start to

Get price### Ball Mill Critical Speed & Working Principle YouTube

Jun 20, 2015 · Learn about Ball Mill Critical Speed and its effect on inner charge movements. The effect of Ball Mill RPM speed going from subcritical to supercritical helps understand the Ball Mill Working

Get price### How To Calculate Charge Volume In Ball Or Rod Mill

Calculating Steel Charge In Mill Bauxite Benifiion Sysstem. Mar 19 2017 We can calculate the steel charge volume of a ball or rod mill and express it as the of Calculate and Select Ball Mill Ball Size for Optimum Grinding In Grinding selecting calculate the correct or optimum ball size that allows for the best and optimumideal or target grind size to be achieved by your ball mill is an

Get price### AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator

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

Get price### THE OPTIMAL BALL DIAMETER IN A MILL

The optimal ball diameter in a mill 333 The grinding efficiency of the narrow particle size fractions with ball charge of various diameters has been observed through the constant of milling rate k in the equation of the grinding kinetics law for the first order grinding R=R 0

Get price### Cement mill ball charge calculation

Difference Between Sag Mill Vs Ball Mill Mech4stud. Oct 12, 2017 The ball charge of a SAG mill is about 29% to 30% By friction and influence of tumbling balls inside rotating cylinder grinds the raw material to the required fineness The internal machinery of ball mill grinds the raw material into the powderlike material, And if extreme fineness and refinery are required then

Get price### DEM Simulation of Mill Charge in 3D via GPU Computing

Discrete Element Method simulation of charge motion in ball, SAG and autogenous mills has become a standard for lifter design, power draft evaluation, etc. Both twodimensional and threedimensional codes are being used. The twodimensional code dominates the user market since the code completes a simulation in one or two hours.

Get price### Ball Mill Design/Power Calculation LinkedIn

Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ¼ inch (6350 microns).

Get price### Orway Mineral Consultants Canada Ltd. Mississauga, ON

and ball mills, have almost become obsolete in the move to higher milling rates required to process lower metal grades. Grinding circuits with fully autogenous (AG) or semiautogenous (SAG) mills, often combined with ball mills are now the standard to meet the high capacity requirement for processing ores with lower metal grades.

Get price### MODELING THE SPECIFIC GRINDING ENERGY AND BALL

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALLMILL SCALEUP Ballmill scale up (Bond''s Law)Data: zBond work index w i zFeed D f and product d size (both 80% cumulative passing) Result: The specific grinding energy w Mill power draw P = wT, where T the mill capacity Mill dimensions (from Tables or charts)

Get price### Appliions GSI Lucchini JSW Steel Italy

Optimal Ball Size and Balanced Ball Charge calculation. Grinding ball performance simulations. Basic design parameters for new or expansion projects. POST SALES: Regular onsite technical customer support. Control of ball performance. Design and assistance to execution of Marked Ball Wear Test (MBWT) and Industrial Test in order to precisely

Get price### LOCKED CHARGE STARTS AND YOUR GRINDING MILL Jeff

LOCKED CHARGE STARTS AND YOUR GRINDING MILL Authors: Jeff Belke & Mitch Bertrand Damaged radial bearing. Output SEAP September 2012 / 2 CAUSES SAG and ball mills with grate discharge are not prone to locked charge events because of the high amount of rocks and balls compared throwing ball charge Most mills are designed with a

Get price### Improved Relationships for Discharge in SAG/AG Mills

there has been a shift of emphasis on ball mill optimization to semiautogenous grinding (SAG) mills. In order to optimize this section, the skills to accurately model and understand its underlying mechanisms are required. The literature exposed a clear lack of previous research on the influence and performance

Get price### The influence of mill speed and pulp density on the

The pilot mill is also equipped with a sensor measuring the ''ball and pulp toe and shoulder angles'' (see Figure 3). These data are then used to calculate the total pulp and ball charge angle (see Graph 5). Graph 5 clearly illustrates how the ball charge stays quite compact till about 73% solids as the total media angle does not change.

Get price### how to calculate sag mill ball charge BINQ Mining

Mill (grinding) – Wikipedia, the free encyclopedia. To calculate the needed grinding work against the grain size changing three halfempirical models are used. SAG mills use a ball charge

Get price### BALL MILL BALL CHARGE Crusher Mills, Cone Crusher, Jaw

Ball Charge Design – #2fishygirl on Scribd Scribd. Grinding Course. Ball Charge Design Methods Ball Charge Design Methods Polysius for Finish Mills A formula that covers the entire mill as though it is a single

Get price### effect of balls charge on sag mill performance

the grain comminution by ball impact, as well as on the basis of the The ball size in a mill has a significant influence on the mill throughput, power where: db max is the maximum ball diameter in a charge, d is the characteristic top limit. >> Get Price startling effect of ball ss removal on sag mill

Get price### The Selection and Design of Mill Liners MillTraj

The Selection and Design of Mill Liners . The second primary function of a liner is to transfer rotary motion of the mill to the grinding media and charge. After all, it is the interface between the mill and the grinding charge. Was generally used for mill liners (AG, SAG and Ball) prior to the movement to higher carbon content steels

Get price### ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION

@article{osti_895022, title = {ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION}, author = {Raj Rajamani and Jose Delgadillo and Vishal Duriseti}, abstractNote = {The grinding efficiency of semi autogenous milling or ball milling depends on the tumbling motion of the total charge within the mill. Utilization of this tumbling motion for

Get price### youtube balanced ball charge in grinding mill Minevik

Home > Products > youtube balanced ball charge in grinding mill. Mobile Crushing Plant. Stationary Crushing Plant. Grinding Mill. Washing & Screening. Three in One Mobile Crusher. Mobile VSI Crusher MTWSeries European Tech. Grinding Mill. LUMSeries Ultra Fine Vertical Grinding Mill. Trapezium Mill. Micro Powder Mill. Raymond Mill. VM

Get price

Previous：batu bara penawaanNext：cement production in europe