
power based sag mill design calculations
power based sag mill design calculations. O. I. SKARIN N. O. TIKHONOV CALCULATION OF . EURASIAN MINING • 1. 2015Technology and technics of ore preparation processes 7 feed for the rod mill, i.e. 10000 μm in accordance with Table. The value of P80 is accepted based on the required grainsize characteristics of the.
SAGMILLING.COM .:. Home
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. The online library of technical articles contain several papers on metallurgical topics including comminution modelling, mass balance calculations
AG Autogenous & SAG SemiAutogenous Mill Design
Table of ContentsSAG Mill ChargeSAG Mill Horsepower — Drive PowerOre Testing for AG & SAG Grinding Mill Design Mill Sizing: After laboratory and pilot plant testing confirm the feasibility of autogenous or semiautogenous grinding, it can be used to establish the exact grinding circuit and mill size. In the pilot plant tests, the tare power of the pilot plant mills should be determined
SAG mill optimisation using powerbased simulations
Grinding mill trajectory model to determine safe operating speed ranges based on liner/lifter design; In this paper, a case study is presented benchmarking actual plant data against Ausgrind model predictions, validating the calculation improvements.
Optimization of the Design of SAG Mill Internals Using
calculations can be used to predict wear on all wear surfaces as well as breakage of particles on a size by size basis and ball/liner breakage Figure 1. Example of HFS modeling of ball and particle motion in a slice of SAG mill using DEM simulation. The CFD simulations used are based on the application of the Navier Stokes equation (with
O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE REQUIRED
Decisionmaking on selection of SAG mills increasingly uses based on the calculation of the overall potential and kinetic energy of the ball charge during its motion inside the rotating mill. design and optimization of crushing and grinding circuits [6].
Powerbased comminution calculations using Ausgrind
predictions for different SAG and ball millbased circuit configurations. Existing powerbased calculations for comminution circuits Most modern grinding circuits consist of a primary SAG mill and
SAGMILLING.COM .:. tools
Mill Filling Calculation Estimates the charge volume of a grinding mill based on the number of exposed lifters. By counting the number of lifters showing (during a mill shutdown) and comparing to the total number of lifters (including those buried in the charge) the fraction of the mill under the charge is
GROSS POWER CALCULATOR SMC Testing
AG/SAG mills in the data calculations by the user. If the mill has cone ends the model automatically calculates the volume of the Ball Mill AG/SAG Mill min max min max DESIGN DATA diameter inside shell (m) 0.9 7.9 1.8 12.2 belly length inside liners (m)
power based sag mill design calculations
SAG mill optimisation using powerbased simulations Author Dr Rajiv Chandramohan Robert Braun Grinding mill trajectory model to determine safe operating speed ranges based on liner lifter design validating the calculation improvements Comparisons of actual and predicted data show improved response of the program for variable
SAG mill optimisation using powerbased simulations
Grinding mill trajectory model to determine safe operating speed ranges based on liner/lifter design; In this paper, a case study is presented benchmarking actual plant data against Ausgrind model predictions, validating the calculation improvements.
Powerbased comminution calculations using Ausgrind
predictions for different SAG and ball millbased circuit configurations. Existing powerbased calculations for comminution circuits Most modern grinding circuits consist of a primary SAG mill and
SAGMILLING.COM .:. tools
Mill Filling Calculation Estimates the charge volume of a grinding mill based on the number of exposed lifters. By counting the number of lifters showing (during a mill shutdown) and comparing to the total number of lifters (including those buried in the charge) the fraction of the mill under the charge is
Orway Mineral Consultants Canada Ltd. Mississauga, ON
total circuit specific energy is the sum of the SAG mill and ball mill specific energies. W SAG = R.(Ms+16000)/(Ms.447.3) (4) W T = K a.K b.W SAG.[10.BWi.(T 800.517000.5).EF5] + W BM.K BM (5) Where: W SAG = SAG mill specific energy from F 80 152 mm to T 80 1.7 mm (kWh/t) R = SAGDesign test mill revolutions (revs)
SINGLE STAGE SAG/AG MILLING DESIGN Metallurgy
based on grind size follows: xCoarse Grind coarser than 80% passing 106 µm. If determined to be reasonably powerefficient, single stage SAG milling is likely to be a comparatively profitable grinding circuit design. xMedium Grind 80% passing size between 106 and 75 µm. To mill in single stage SAG configuration, the
SAG mill wear optimization using DEM simulation
13032018· Stopping mill equipment is not a desirable alternative, so the best way to resolve SAG mill challenges is to use simulation technology for equipment design alterations. Replacing the SAG’s wornout liner can occur every six to nine months and cost between $30,000 U.S. and $200,000 U.S. per hour, and each repair takes between 40 hours and 120 hours.
A comparative
Based on the proposed daily mill throughput, DJB assumes that at least 75% of the samples are above the nominal mill throughput. Considering a mill runtime of 94% and a final P80 size of 180 micrometers, the proposed circuit consists of a SAG mill 40 feet in diameter and 25 feet in length
Semiautogenous grinding (SAG) mill liner design and
SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computerbased modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e.,
A Mechatronic Solution Design and Experience with Large
only small mill tubes were manufactured and also the magnetic forces were less compared to today’s large high power mills. Mechanical design calculations were based on static load cases in terms of forces and acceleration loads. The simulation models were very coarse due to the rudimentary computer capacities which were available at this time.
Grinding Circuit Design for Adanac Moly SGS
SAG grinding) and Bond Ball mill work index, BWi (for ball mill grinding). A further measure, the Minnovex crusher index, Ci was also measured for use in the CEET program to determine SAG mill feed size (Kosick and Bennett, 2001). The SPI values varied from 13.5 to 107 minutes with an average of 53 minutes. This variability, although apparently
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
O. I. SKARIN N. O. TIKHONOV CALCULATION OF THE REQUIRED
Decisionmaking on selection of SAG mills increasingly uses based on the calculation of the overall potential and kinetic energy of the ball charge during its motion inside the rotating mill. design and optimization of crushing and grinding circuits [6].
Modelling SAG milling power and specific energy
01012015· Accordingly, this will generate the possibility of increasing the SAG mill throughput, without affecting the product particle size going to the secondary ball mills. For SAG mill design, this model could help by generating a correction factor over the power (kW) calculated in the usual way by multiplying the specific energy in kW h/t (determined from experimental testing)
Powerbased comminution calculations using Ausgrind
predictions for different SAG and ball millbased circuit configurations. Existing powerbased calculations for comminution circuits Most modern grinding circuits consist of a primary SAG mill
SINGLE STAGE SAG/AG MILLING DESIGN
A guide based on grind size follows: xCoarse Grind coarser than 80% passing 106 µm. If determined to be reasonably powerefficient, single stage SAG milling is likely to be a comparatively profitable grinding circuit design. xMedium Grind
Calculation of Sag & Tension in Transmission Line for
Calculation of Sag and Tension at an unequal level supports. In hilly areas or sloping grounds, the supports are not usual at the same level. For the calculation of sag and tension at unequal supports level consider a conductor AOB. The portion of OA and OB may be treated as catenaries of half span x and lx respectively shown in the figure
Sample Calculation of Sag and Tension in Transmission
16022018· In the previous post, we calculated the sag and tension of a transmission line given that the conductors supports are at the same elevation.In 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. Also, loading of the conductors are based on the
Powerbased grinding models for design and geometallurgy
13102013· ball mill CF factors, geometallurgy and sampling an orebody. Alex D. 10:3011:00 Coffee break AM 11:0012:30 Mill power draw models for ball mills and SAG mills. Alex D. 12:3013:30 Lunch 13:3015:00 (tutorial) Example calculation in the SAGMILLING.COM software; use a preloaded set of test results to run a mill sizing exercise using the
A comparative
above the nominal mill throughput. Considering a mill runtime of 94% and a final P80 size of 180 micrometers, the proposed circuit consists of a SAG mill 40 feet in diameter and 25 feet in length (EGL), with an installed gearless motor of 30 MW and two 28 feet diameter by 44.5 feet in length ball mills equipped with 22 MW gearless motors.
Sample Calculation of Sag and Tension of Transmission
13012018· 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. Also, loading of the conductors are based on the National Electrical Safety Code 2017. Problem:
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
Multicomponent AG/SAG mill model ScienceDirect
01042013· The model calculates the specific comminution energy (Ecs) for each size fraction in the mill load using the highest energy reference level ( E1 ), which is related to the average size of the coarsest 20% of the rock charge by mass ( S20 ), and the relationship proposed by Austin et al. (1984) in Eq. (8).
(PDF) Sagtension Calculations A Tutorial Developed for
Sagtension Calculations A Tutorial Developed for the IEEE TP&C Line Design Subcommittee Based on a CIGRE WG B2.12 Technical Brochure under Development Dale Douglass June,,Vol. PAS89, No. 3, pp. 380386, March 1970 • Rawlins, C.B., “Some Effects of Mill Practice on the StressStrain Behaviour of ACSR”, IEEE WPM 1998, Tampa
SAG MILL GRINDING DESIGN VERSUS GEOMETALLURGY
SAG MILL GRINDING DESIGN Signiﬁ cant differences between macro and micro grindability relationships, and the true magnitude of SAG hardness variability have been discovered for SAG mill and ball mill design measurements. 1. Principal Consulting Engineer, Starkey & Associates Inc, 212151 Randall Street, Oakville ON L6J 1P5, Canada.
Sample Calculation of Sag and Tension in Transmission
16022018· In the previous post, we calculated the sag and tension of a transmission line given that the conductors supports are at the same elevation.In 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. Also, loading of the conductors are based on the
Sample Calculation of Sag and Tension of Transmission
13012018· Calculate the sag and tension at: No load conditions (no wind/ice load) Heavy loading district: Ice thickness = 12.5 mm, Wind load = 190 Pa, t = 20 °C; Maximum Conductor Temperature: t max = 90, no wind, no ice
Powerbased grinding models for design and geometallurgy
13102013· ball mill CF factors, geometallurgy and sampling an orebody. Alex D. 10:3011:00 Coffee break AM 11:0012:30 Mill power draw models for ball mills and SAG mills. Alex D. 12:3013:30 Lunch 13:3015:00 (tutorial) Example calculation in the SAGMILLING.COM software; use a preloaded set of test results to run a mill sizing exercise using the
The Selection and Design of Mill Liners MillTraj
mills in the older plants that had many mills in parallel. In fact this is generally still the case in the multistream plants, where mill liner design and selection is only tackled on a cost consumables basis. However, the gains to be had through good liner design and selection are just as great as on the large SAG mills.
Mechanics and Machine Design, Equations and
Mechanics and Machine Design, Equations and Calculators, Design of Load Carrying Shaft With One Pulley & Supported by two Bearings, Flywheel Effect or Polar Moment of Inertia, Lifting Boom, Davits Application and Design Equations, Large and Small Diameter Lifting Pulley / Drums, Two Lifting Lifting Pulley's Mechanical Advantage, Multiple Pulley's Lifting Mechanical