sag mill design calculations

sag mill design calculations

AG - Autogenous SAG Semi-Autogenous Mill Design Calculations

Apr 17, 2018  Obviously, the SAG mill is consuming more and the ball mill less power than was predicted by the empirical method, but the overall total is 99.5% of the predicted total. Examples. The Hemlo gold project of Teck-Corona (1000 mtpd) provides an example of mill sizing using the empirical calculation

More

SAGMILLING.COM .:. Home

Internet-based calculations and energy models for mineral comminution. Sagmilling is home to a collection of both free and subscription-based calculation tools to aid metallurgical process engineers perform comminution calculations. Grinding circuit design tools, including for SAG mill-ball mill circuits, and geometallurgy energy models are ...

More

SAGMILLING.COM .:. tools

SAGMILLING.COM .:. tools. Mill Critical Speed Calculation. Estimates the critical speed of a grinding mill of a given diameter given the mill inside diameter and liner thickness. If given a measured mill rotation (RPM), then the mill`s fraction of the critical speed is given. Internet Slide Rule.

More

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

tions at early design stages. The article is composed of sections successively informing on the existing techniques of sizing SAG mill power, Bond work in-dexes and their applicability to calculating autogenous/semiau-togenous mills. Finally, the authors give a comparative analysis of the results obtained using the described method and in the

More

Optimization of the Design of SAG Mill Internals Using ...

of SAG mill performance through 1. Changes in liner/lifter design to maximize throughput while maintaining acceptable wear levels. 2. Changes in ball size to maximize particle breakage without producing exceptionally high impact forces. 3. Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput.

More

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

tions at early design stages. The article is composed of sections successively informing on the existing techniques of sizing SAG mill power, Bond work in-dexes and their applicability to calculating autogenous/semiau-togenous mills. Finally, the authors give a comparative analysis of the results obtained using the described method and in the

More

SAGMILLING.COM .:. tools

SAGMILLING.COM .:. tools. Mill Critical Speed Calculation. Estimates the critical speed of a grinding mill of a given diameter given the mill inside diameter and liner thickness. If given a measured mill rotation (RPM), then the mill`s fraction of the critical speed is given. Internet Slide Rule.

More

A Method of C alculating Autogenous/ Semi-Autogenous ...

SAG mill can operate at a reasonable ef ciency if the fi nal fi ... The fi nal DB Consulting (DBC) AG/SAG SE calculation is based on an AG/SAG circuit without a pebble crusher. ... an ineffi ciency value in the region of 1.25 because the design 80 per cent passing value is not achieved. The ball mill

More

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ...

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

More

GROSS POWER CALCULATOR - SMC Testing

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 ... power draw of an AG/SAG mill to drop can be gauged by switching the discharge mechanism choice in

More

Simine Mill Design and Experience Mill Drives

response spectrum calculations. The first steps to a overall 3D system model were done to examine dynamic seismic response of the complete SAG mill unit including foundation, mill bearing as well as the electric motor. The analysis was also exchanged, reviewed and discussed with independent specialists. Design Of Converter And Control System

More

SAG mill wear optimization using DEM simulation - Rocky DEM

Mar 13, 2018  Video 1: Mill Showing Surface Wear Modification Case scenario. Consider a large SAG mill with a diameter of 10.97 m, as shown in Figure 1a. The mill has a high-definition line design with alternating lines of high and low elevators (Figure 1b). The mill processes rocks from 200 mm to 300 mm, using 350 mm steel balls as the grinding medium.

More

Starkey Associates Inc. - Leaders in Comminution Design

John Starkey, P. Eng. has worked in SAG mill hardness testing since 1964 where he worked as pilot plant engineer for A. MacPherson’s projects. He invented the SPI and SAGDesign tests. The latter is now acknowledged by our clients to be a world-class method for grinding circuit design, and is accepted by our peers as a standard for ore ...

More

Power-based comminution calculations using Ausgrind

predictions for different SAG and ball mill-based circuit configurations. Existing power-based calculations for comminution circuits Most modern grinding circuits consist of a primary SAG mill and ...

More

Modelling SAG milling power and specific energy ...

Jan 01, 2015  The appropriateness of the transfer size in AG and SAG Mill Circuit Design. SAG 2011, Vancouver, Canada (2011), pp. 1-12. Paper 153. View Record in Scopus Google Scholar. Moys, 1993. M.H. Moys. A model of mill power as affected by mill speed, load volume and liner design.

More

What's the Difference Between SAG Mill and Ball Mill ...

Nov 26, 2019  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. The calculation shows that the crushing ratio can reach 3000 ~ 4000, while the ball mill’s ...

More

SAG mill optimisation using power-based simulations Ausenco

Ausgrind program improvements include: Mill liner wear and life prediction for any liner/lifter design. SAG mill slurry pooling model to predict the onset and effect of slurry pooling for varying operating conditions. Grinding mill trajectory model to determine safe operating speed ranges based on liner/lifter design. In this paper, a case ...

More

SAG Mill Optimization using Model Predictive Control

Control of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., Mainza, A.N. 2009).

More

Hydrocyclone Design Calculation

ball mill circuit design calculation - Quarry Crusher ... THE SIZING AND SELECTION OF HYDROCYCLONES - FL. design, ... Table 5.1 Summary of AG/SAG mill circuit process design

More

SAG Mill Optimization using Model Predictive Control

Control of -SemiAutogenous Grinding(SAG) mill weight is an example of an important process that exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., Mainza, A.N. 2009).

More

CMD Consulting uses Rocky DEM power calculations to ...

SAG mill design CDM Consulting used to test Rocky DEM power draw Empirical Model Rocky DEM Model Figure 1 - Morrell C-model for mill power draw Rocky calculations for power draw were shown to accurately replicate Morrell’s C-model for power draw, an increasingly critical component in mill design

More

Grinding Mill Computer Model

3.3 Ball Mill Design The ball mill designs also follow the Bond/Rowlings method with comparison with other methods. Again the method of use is the same 3.4 SAG/BM Combined design This is the combined model of the SAG and BM models. The difference is that a provision in the BM model allows for the fact that finished product is in the BM feed.

More

(PDF) Sag-tension Calculations A Tutorial Developed for ...

Sag-tension Calculations A Tutorial Developed for the IEEE TPC Line Design Subcommittee ... Sag-tension Calculations A Tutorial Developed for the IEEE TPC Line Design Subcommittee. S. U . N. Rio Darputra. Download PDF. Download Full PDF Package. This paper. A short summary of this paper. 28 Full PDFs related to this paper.

More

Modelling SAG milling power and specific energy ...

mill diameter, mill length, grates openings, and pebble ports size; the power equation is also function of all the operational variables selected for this study. The applied force is a function of the mass inside the mill and it is composed of balls, ore and water. The ball charge is a function of the bulk fraction of the SAG mill volume (Jb)

More

Engineering Starkey and Associates Inc.

Includes testwork to finalize recommended mill sizes and compares this with vendor bids. Potential throughput in mills bid by vendors and any possible issues can also be evaluated. Grinding Mill / Circuit Design. Using patented SAGDesign technology ensures availability of design calculations for review. Activities include:

More

Grinding Circuit Design for Adanac Moly - SGS

design of a plant for Adanac Moly Corp. to include SAG and Ball milling. The hardness of each sample was measured in terms of SAG power index, SPI (for 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

More

Autogenous and Semi-Autogenous Mills FLSmidth

Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

More

TECHNICAL NOTES 8 GRINDING R. P. King

8-3 Centrifugal force outward Fc mp 2 Dm 2 (8.1) is the angular velocity, mp is the mass of any particle (media or charge) in the mill and Dm is the diameter of the mill inside the liners. Gravitational force Fg mpg (8.2) The particle will remain against the wall if these two forces are in balance ie.

More

Mill (grinding) - Wikipedia

SAG mill. SAG is an acronym for semi-autogenous 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

More

The Siemens 42ft gearless mill drive, still an ...

This document summarizes the current design criteria and the due diligence approach from Siemens in designing the next size Gearless Mill Drive, i.e. a 42ft mill. It is a dual design approach considering, on the one hand, the experi-ences Siemens made with Gearless Mill Drive (GMD) instal-lations over the past 40 years and, on the other hand, using

More

Difference Between Sag Mill vs Ball Mill - mech4study

Oct 12, 2017  1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.

More

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

More

ME FIT System Optimized Mill Liner and Grinding Media ...

DEM (Discrete Element Method) simulations have become an essential tool in the design and optimization of equipment used in grinding and crushing applications. ... Calculation of deformation in a grinding mill / Calculation of stress in a SAG mill grate / Calculation of deformation in a SAG mill

More