power calculation formula of sag mill greenrevolution.in

PDF (1044 K) Journal of Mining and Environment (JME) power index (SPI), and a formula for the SAG mill calculation of liner weight and volume at each stage a Starkey mill was used to measure SAG mill power.

A Method of C alculating Autogenous/ Semi-Autogenous

SAG mills mimic the same shortcoming. It follows that in order to obtain the speciﬁ c energy (SE) to achieve a certain transfer size, based on the 80 per cent passing value, an inefﬁ ciency factor must be applied to the SE of single stage ball mills, rod mills or AG/SAG mills when calculating power according to the Bond Third Theory method.

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

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

Methods to Estimate AG/SAG Mill Power Requirements

Methods to Estimate AG/SAG Mill Power Requirements. Previous Next (on SAG ground ore, not from crushed cores) all you need to design circuit & size mills. * No hidden formula, no IP only open technology available i.e. convert the test results (in kWh/t instead of strange or no units) to SAG and Ball Mill pinion energy (in kWh/t

sagdesign

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

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

TECHNICAL NOTES 8 GRINDING R. P. King Mineral Tech

TECHNICAL NOTES 8 GRINDING R. P. King. 8-2 &ROOLVLRQ 5ROOLQJ ZLWK QLSSLQJ complicated in practice and it is not possible to calculate the path taken by a particular particle during station of LG A mill power equation for SAG mills. Minerals and

SAG Mill Grinding Circuit Design

Semi Autogenous Design FactorsSag Mill Operation ExampleProcess Plant DescriptionSag Mill Design and SpecificationOperating Problems Since CommissioningDesign Changes and Future Operating StrategiesThe design of large mills has become increasingly more complicated as the size has increased and there is little doubt that without sophisticated design procedures such as the use of the Finite Element method the required factors of safety would make large mills prohibitively expensive.In the past the design of small mills, up to +/- 2,5 metres diameter, was carried out using empirical formulae with relatively large factors of safety. As the diameter and length of mills increased several crit.

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.

Predicted Motor Input Power Calculator

The SMC Test® is the most widely-used, industrially-proven comminution test comercially available for AG & SAG Mills, HPGRs and crushers. Predicted Motor Input Power Calculator MENU

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.

GROSS POWER CALCULATOR SMC Testing

GROSS POWER CALCULATOR General This model uses the equations from Morrell’s 1993 PhD thesis: “The Prediction of Power Draw in Wet Tumbling Mills”. The model is also described in detail in the book “Mineral Comminution Circuits Their power draw of an AG/SAG mill to drop can be gauged by switching the discharge mechanism choice in

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 ?

CALCULATION OF BALL MILL GRINDING EFFICIENCY Page 1

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 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.

SAGMILLING.COM .:. 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.

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.

O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE

CALCULATION OF THE REQUIRED SEMIAUTOGENOUS MILL POWER BASED ON THE BOND WORK INDEXES O. I. SKARIN, Senior Researcher, Candidate of Engineering Sciences N. O. TIKHONOV, Head of Subdivision Optimization of ore pretreatment and selection of the ap-propriate equipment is one of the main areas of activity of RIVS Science and Production Association.

MODELING THE SPECIFIC GRINDING ENERGY AND BALL

2 MODELLING THE SPECIFIC GRINDING ENERGY AND BALL-MILL SCALEUP Ball-mill 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)

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.

Power-based comminution calculations using Ausgrind

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

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

Published in: Minerals Engineering · 2015Authors: M Silva · Ana CasaliAffiliation: University of Chile

Statistical Power: What it is, How to Calculate it

Calculate power in SAS. Calculate power in PASS. Power Analysis. Power analysis is a method for finding statistical power: the probability of finding an effect, assuming that the effect is actually there. To put it another way, power is the probability of rejecting a null hypothesis when it’s false. Note that power is different from a Type II

Cutting Power for Face Milling MITSUBISHI MATERIALS

What is the cutting power required for milling tool steel at a cutting speed of 80m/min. With depth of cut 2mm, cutting width 80mm, and table feed 280mm/min by Φ250 cutter with 12 inserts. Machine coefficient 80%. （Answer） First, calculate the spindle speed in order to obtain feed per tooth. n=1000vc÷πDC=(1000×80)÷(3.14×250)=101.91min-1

hydroelectricity power and energy calculator free online

Calculation of hydroelectric power and energy Principle. The principle of hydro electricity generation is quite simple. Circuit waterworks provides the necessary pressure of water supplied to the turbine blades, which drives a generator, producing electricity. Formula to calculate hydropower. How to calculate output power of a hydroelectric

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

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.

SAG Calculator Edmund Optics

SAG Calculator. Determine sag of a surface based on radius of curvature and diameter. Calculator can be used to provide simple mechanical parameters that simplify specification of optical components. Commonly used for lenses and mirrors.

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.

Conductor Tension Calculator Transmission & Distribution

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

Sag and Tension Calculations Refinements and

Unlike traditional sag-tension programs that rely on a database to define properties for the selected conductor, these values are calculated by an auxiliary program. Developed by Trimble, this program works with the sag-tension program. The calculated properties associated with the selected conductor are used in analysis calculations and include:

Bucket Elevator Motor Power Calculation bulk-online

Dec 28, 2015· Bucket Elevator Motor Power Calculation If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed.

Module 7 1 Calculate tension in a rope given sag YouTube

May 28, 2014· Top 7 Mistakes Newbies Make Going Solar Avoid These For Effective Power Harvesting From The Sun Duration: 7:14. LDSreliance Recommended for you

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

CALCULATION OF BALL MILL GRINDING EFFICIENCY Page 1

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

Roller Chain Calculation Basics Search Autodesk

The chain power capacity is not reduced usually. using additional factors it participates in calculation of expected chain links service life or link plates fatigue. The longest practical center distance is about 80 times the chain pitch because chain sag and catenary tension become very large.

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,