power calculation formula of sag mill

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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.


Mar 08, 2013 · calculation of ball mill grinding efficiency. dear experts . please tell me how to calculate the grinding efficiency of a closed ckt & open ckt ball mill. in literatures it is written that the grinding efficiency of ball mill is very less [less than 10%]. please expalin in a n excel sheet to calcualte the same. thanks. sidhant. reply

Sag in Overhead Transmission Line and Its Calculation

Sep 21, 2016 · Sag in Overhead Transmission Line and Its Calculation Sag in overhead Transmission line conductor refers to the difference in level between the point of support and the lowest point on the conductor. As shown in the figure above, a Transmission line is supported at two points A and B of two different Transmission Towers.

What Is Sag,Tension ? Calculations,Factors In Overhead

The difference in level between points of supports and the lowest point on the conductor is called "sag".When transmission lines run on steep inclines as in the case of hilly areas, we generally come across conductors suspended between supports at unequal levels.The shape of the conductor between the supports may be assumed to be a part of the parabola.

Sag calculation SlideShare

May 23, 2017 · Because, low Sag means a tight wire and high tension, whereas low Tension means a loose wire and increased Sag. 8. CALCULATION OF SAG 1. When Supports are Equal: Let, L = length of the span, w = weight per unit length of the conductor, T = tension in the conductor. 9. CALCULATION OF SAG (Cont..) 2.

Wind Power Engineering ToolBox

Be aware that the density of air decreases with temperature and altitude and that the major factor in wind power generation is wind speed. 20% increase in wind velocity will increase the power generation with 73% The theoretical and rated wind power generation from a typical windmill is indied in the "wind speedpower curve" below.

Sample Calculation of Sag and Tension of Transmission Line

Jan 13, 2018 · This is an example calculation for sag and tension in transmission line. You may opt to review first the fundamental principles and formulas from the previous post.Creep is not considered as a factor in final sag in this calculation.

Orway Mineral Consultants Canada Ltd. Mississauga, ON

The SAG Power Index (SPI) test (Starkey & Dobby, 1996) uses a benchscale SAG mill test to determine the specific energy of an industrial SAG mill. The test is operated in closed circuit and the time required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG

SAG Mill Grinding Circuit Design

With a higher density mill charge. SAG mills have a higher installed power density for a given plant footprint relative to AC mills. With the combination of finer grind and a lower installed power density (based on the lower density of the mill charge), a typical AG mill has a lower throughput, a lower power draw, and produces a finer grind.

SAGMILLING .:. tools

tools . Login Register . tools Home Calculations. Mill Critical Speed Calculation: Estimates the critical speed of a grinding mill of a given diameter given the mill inside diameter and liner thickness. Determines the effective mill inside diameter of a given set of "top hat" lifters for use in mill volume and critical speed calculations.

SAGMILLING .:. Mill Critical Speed Determination

Enter the width of a mill shell liner. Note this is not the width of a lifter! You may use the Mill Liner Effective Width calculation to determine this value. The mill critical speed will be calculated based on the diameter (above) less twice this shell liner width. Mill Actual RPM: Enter the measured mill rotation in revolutions per minute.

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator

Energy and power calculations based on Bonds Work Index (Wi, in order to arrive the gross mill power. For all AG or SAG installations, batch lab tests are mandatory to determine whether this type of grinding is possible at all, as well as establishing the necessary specific power consumption. AMIT 135: Lesson 6 Grinding Circuit

Force, Torque, and Power Kennametal

Calculate Tangential Force, Torque, and Machining Power for Face Milling Appliions. Home / Resources / Engineering Calculators / Face Milling / Force, Torque, and Power. Force, Torque, and Power For Face Milling Appliions with High Shear Cutters F p Feed rate: (IPM) (with productivity formula) mm/min (with productivity formula) Q

power calculation formula of sag mill

a mill power equation for sag mills. LG A mill power equation for SAG mills.ends. c is the specific gravity of the charge sag mill specific energy calculation formula The traditional approach to Contact Supplier Power Calculation Formula Of Sag Mill

A Method to Determine the Ball Filling, in Miduk Copper

autogenous (SAG) Mill via an utilized method. Miduk SAG Mill circuit is shown in Figure 1. Figure 1: Diagram of Miduk Copper Complex SAG Mill Methods The following methods were utilized in this research work for ball filling calculation. To fulfill this aim, three approaches were investigated. Surface load photograph,

Loveday/Barratt SAG model SAGMILLING

Derek Barratt (2002) derived a set of power numbers for industrial machines for use in Loveday''s base formula, where a power number for a particular mill filling and speed are read from a chart and then charge density, including the ball load, are fed into Loveday''s formula to predict SAG mill power draw.

Wind Energy Formula Byjus Formulas

Wind energy formula. Wind energy is a kind of solar energy. Wind energy describes the process by which wind is used to produce electricity. The wind turbines convert the kinetic energy present in the wind to mechanical power. Wind energy is a renewable source of energy that determines the total power

Sag calculation in overhead line Electricalunits

Sag calculation in overhead line Sag in overhead line: The sag in overhead line is a length in between support point of conductor and the lowest point on the conductor of

Optimization of mill performance by using

Mill power Usually, plant operators use mill power readings as an indior of ball filling degree and, often, try to keep it at the maximum level. It is well known that the mill absorbed power depends on operating parameters other than ball level, such as pulp density and liner configuration.

Choosing a SAG Mill to Achieve Design Performance

the correct power required to grind ore in a SAG mill, by developing ore hardness variability functions for the ore body to be mined. This paper describes the next step in the SAG design process, which is choosing a SAG mill to accomplish the required specified design performance.

Simple Calculations for Cable Pulling EC&M

Sample power feeder installation. Suppose you''re involved in a design/build project for a paper mill and your client needs a 400A, 15kV feeder to run as shown in Fig. 1 (right). The client has required all feeders on the site to be pullinpullout type in galvanized rigid steel (GRS) conduit.

power calculation formula of ball mill

power calculation formula of sag mill 201868 · Power Calculation Formula Of Sag Mill . calculates the grinding charge of a ball mill how to calculate sag mill ball charge formula to calculate ball mill volume loading » Learn More motor calculation of ball mill design « coal crusher The SAG mill cost 12 2 Get Price

Predicted Motor Input Power Calculator SMC Testing

The SMC Test® is the most widelyused, industriallyproven comminution test comercially available for AG & SAG Mills, HPGRs and crushers. Predicted Motor Input Power Calculator MENU

Sag in Overhead Conductor Electrical4U

Apr 17, 2018 · So, having calculated the value of x 1 and x 2, we can easily find out the value of sag S 1 and sag S 2. The above formula are used to calculate sag when the conductor is in still air and ambient temperature is normal. Hence the weight of the conductor is its own weight.

Conductor Tension Calculator T&D World

It is critical that utility personnel apply the appropriate tension to overhead conductors. Too little tension and the sag of the line can be excessive. Too much tension and the conductor can snap in cold weather. Once initially set, the tension of the conductor is determined by creep and by line temperature.

Drilling formulas and definitions

To know how to calculate drilling speeds and feeds is critical for successful drilling. In this section you find the drilling formulas and definitions needed for your drilling operations, such as cutting speed, feed per revolution and specific cutting force.

ball mill power calculation how do i calculate purchase

ball mill power calculation how do i calculate purchase . 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 optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do.


Sagmilling 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.

Modelling SAG milling power and specific energy

Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles M. Silva, A. Casali⇑ Mining Engineering Department, Universidad de Chile, Beauchef 850, Santiago 8370448, Chile

Ball Mill Critical Speed Mineral Processing & Metallurgy

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

A Method for the SagTension Calculation in Electrical

A method for the sagtension calculation in electrical overhead lines I. Albizu 1, A.J. Mazon 1, E. Fernandez 1 Abstract – The sag and tension values of overhead conductors are influenced by

SagTension Spreadsheet Free Calculator (Even Elevation

Aug 01, 2018 · As promised, you can download for free my sagtension spreadsheet calculator. Take note that because of the complexity of the creep in a conductor, it is not a factor in these calculations. Also, this calculator is only for even supports. You can use this spreadsheet to verify the results in my sample computation in the previous post.

Sugar Mill Settings

Mill and Trash Plate Setting. The Sugar Engineers can offer an effective and rapid mill setting service for your factory. In order to get a sense of what we can offer you can do mill setting calculations online for your mill now.. Setting a mill includes the calculation of the openings between the various mill rolls and well as the shape and position of the trashplate.


mill is the energy consumption. The power supplied to the mill is used primarily to lift the load (medium and charge). Additional power is required to keep the mill rotating. 8.1.3 Power drawn by ball, semiautogenous and autogenous mills A simplified picture of the mill load is shown in Figure 8.3 Ad this can be used to establish the essential

Sample Calculation of Sag and Tension in Transmission Line

In the previous post, we calculated the sag and tension of a transmission line given that the conductors supports are at the same elevation this example we will calculate the sag and tension if the conductor supports are at different elevation. Creep is not considered as a factor in final sag in this calculation.

Powerbased comminution calculations using Ausgrind

The SAG and ball mills power draw is calculated using semiempirical equations, as a function of mill geometry, speed and load. • The SAG Power Index (SPI) test was developed by Starkey and

Ball Mill Power Calculations Mineral Processing & Metallurgy

The user interface offers Metric OR Imperial measurements for sizing SAG/AG and Ball Mills of overflow or grate type discharges. Skip to content. Laboratory Testing. Consulting & Engineering. Process Equipment. Contact Us. Buy Process Equipment. Ball Mill Power Calculations. Previous Next

Milling formulas and definitions

Here you find a collection of good to have milling formulas and definitions that are used when it comes to the milling process, milling cutters, milling techniques and more. Knowing how to calculate correct cutting speed, feed per tooth or metal removal rate is crucial for good results in any milling operation.

Ball Mill Design/Power Calculation

The basic parameters used in ball mill design (power calculations), rod mill or any tumbling mill sizing are material to be ground, characteristics, Bond Work Index, bulk density, specific density, desired mill tonnage capacity DTPH, operating % solids or pulp density, feed size as F80 and maximum ''chunk size'', product size as P80 and maximum and finally the type of circuit open/closed

Calculation of Sag & Tension in Transmission Line for

Calculation of Sag & Tension Calculation of sag and tension in transmission line depend on the span of the conductor. Span having equal level supports is called level span, whereas when the level of the supports is not at an equal level is known as unequal level span.

calculates the grinding charge of a ball mill Mining

optimizing sag mill product size in sag mill _ ball mill grinding circuits How Can i calculate the wear rate of grinding media in ball How Can i calculate the wear rate of grinding media in ball mills without having to go inside the mills and do the physical how to calculate the mill charge ?