SAG mill optimization insights by measuring inside the mill *P. Shelley, I. Molina, D. Patsikatheodorou. Presented at Procemin GEOMET 2019 . ABSTRACT. The paper shows how measurements from inside an operating SAG mill are now a reality. The paper discusses how the measurements might affect and enhance energy efficient mill optimisation.
ادامه مطلب
optimization study of the circuit performance was conducted to improve the product fineness through circuit surveys, experimental lab work and simulations. In three full scale sampling campaigns, size distributions and solids contents of the samples were ... 4.2.1 SAG Mill Feed ...
ادامه مطلب
(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 of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from
ادامه مطلب
A cone crusher reduces the SAG's discharge screen's oversize material. A 14 foot diameter ball mill ensures final grinding before the flotation stage.Many control strategies were used at the SAG over the past few years. Fuzzy Logic was first used in …
ادامه مطلب
Based on experience, mill-liner designs have moved toward more open-shell lifter spacing, increased pulp lifter volumetric capacity, and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. As a guideline, mill throughput is maximized with shell lifters between ratios of 2.5:1 and 5.0:1.
ادامه مطلب
A sorting machine can also be placed in the pebble circuit of an AG or SAG mill. Removing waste from the milling circuit can de-bottleneck many processes. With the addition of sorting to the processing plant, significant economic opportunity …
ادامه مطلب
Optimizing Mill Feed Size. Mine to Mill Mine to Mill SAG Mill: "Tent" Diagram: Higher Speed (Brodie, Barratt) – Predicted Operation SAG Mill Grate – Curved Bolt Pattern Our Clients: info@djbconsultantsinc Tel: 604-608-6195: Suite 1000-355 Burrard St, Vancouver, BC V6C 2G8 ...
ادامه مطلب
into AG/SAG mill circuits to break the critical size particles that accumulate in the mill and to increase the performance of the primary grinding circuits. Many studies have been carried out, mainly focusing on optimizing of SAG mills and cone crushers, respectively, but only a few have investigated the dynamic interactions between a
ادامه مطلب
circuit. The Kinross Paracatu new grinding circ uit consists of one 11.6 x 6.7m (38' x 22') SAG mill with. installed po wer of 20MW, followed by two 7.3 x 12.2m (24' x 40') ball mills with ...
ادامه مطلب
ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION SEMI ANNUAL TECHNICAL PROGRESS REPORT Semi-annual Technical Report Reporting period starting date December 24, 2005 Reporting period ending date June 24, 2006 RAJ RAJAMANI, PROJECT MANAGER JOSE DELGADILLO, PROJECT LEADER VISHAL DURISETI, GRADUATE STUDENT Date report issued …
ادامه مطلب
STEPPING FORWARD: USING VARIABLE SPEED DRIVES FOR OPTIMIZING THE GRINDING PROCESS IN SAG AND BALL MILLS *I. Atutxa and I. Legarra . Ingeteam Power Technology . Parque Tecnológico de Bizkaia, Edificio 110 . Zamudio, Vizcaya, Spain (*Corresponding author: inigo.atutxa@ingeteam)
ادامه مطلب
Protecting and Optimizing Mills The main benefits of this type of reliable SAG mill monitoring are accurate and repeatable decibel signals at the various frequencies – information that is used to protect the mills. The next phase of the project is to provide measurements that can help customers operate a SAG or AG mill optimally.
ادامه مطلب
Optimizing the Characteristics of the Motion of Steel Balls and their Impact on Shell Liners in SAG Mills The equations governing the motion of steel balls and their S. Ebrahimi-Nejad impact onto shell liners in industrial Semi-Autogenous Grinding Rafsanjani * (SAG) mills are derived in full details by the authors and are PhD Candidate used in order to determine the effective design variables ...
ادامه مطلب
In order to help the customer to achieve these goals, continued in-depth studies to further optimize the SAG mill linings. At the end of September …
ادامه مطلب
Optimizing your SAG mill operation. Posted by Matrix on 21st March 2007 Sanjeev Latchireddi, Chief Process Engineer – Grinding Americas, Outokumpu Technology, looks at the shift from ball mills to SAG mills. Nowadays, the more successful plants are those that have adopted effective and efficient strategies to optimize their plant operation.
ادامه مطلب
Sossego was the first Vale SAG mill operation to process copper-gold ore. It is located in Para state, south east of Amazon region in Brazil. The comminution circuit was designed to treat 41 000 ...
ادامه مطلب
D80 SAG feed, mm 84.3 84.3 62.5 J Total SAG mill, % 27 32 32 J B SAG 14.7 14.7 14.7 J B BM1 32 32 33 J B BM2 32 32 33 Summary of Results The integral optimization is limited by boundary conditions, such as the maximum powder factor depends on bench stability rather tan benefit at the SAG mil. Main results and conditions are listed below:
ادامه مطلب
AG/SAG mills, circuit design, plant performance, optimization INTRODUCTION AG or SAG mills have been in use in comminution circuits since the 1950's and are considered a mature technology in most countries. However, a reasonable number of recent SAG mill based projects
ادامه مطلب
Optimizing your SAG mill operation - International Mining • Efficient operation even at higher mill speeds • Operator-friendly smooth mill operation • Significantly improve wear life • Can be precisely designed to handle the given capacity • Can be easily retro-fitted to existing mills. The optimal performance of AG/SAG mills is the ...
ادامه مطلب
Figures 8 and 9 on the right show results from a gold plant's SAG mill achieved with MillStar's Segregated Ore Feed Controller combined with the Power Optimiser: • The standard deviation of the mill feed control is greatly reduced. • The cyclone feed is more stable, allowing for consistent size ...
ادامه مطلب
the feed to the Sag mill might be specified in fuzzy rules. EXAMPLE OF FUZZY SAG CONTROL SYSTEM The following examples show how the feed rate to a mill can be controlled using fuzzy logic. FEED CONTROL RULES Controlling the feed rate to a SAG mill is at the heart of all grinding optimization systems. Besides trying to maximize the tonnage rate ...
ادامه مطلب
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).
ادامه مطلب
SAG MILLS OPTIMIZATION IMPLEMENTATION AND . 2014 12 18 Mill Pulp Trommel Free Flow by Free SAG Plant Diameter feet Diameter feet Long feet Flow m 3/h Area m 2 Area m 2 Area m 3/m 2/h C.M.D.I Collahuasi 32 14 4 13 6 935 57 0 15 4 61 Minera Los Pelambres 36 15 9 16 4 2.063 75 9 19 7 105. Chat Now; SAG mills
ادامه مطلب
Optimising the capacity of your SAG mill is crucial to avoiding downtime and liner wear and damage. With variances in mill ore feed rate, mill speed and slurry density, critical impacts can occur in your SAG mill. The speed at which these variances are adjusted …
ادامه مطلب
As SAG and other types of mills are power hungry, even a marginal reduction in power draw can translate to massive energy savings. Conventional approaches to achieve these goals are based on a combination of practical experience and 'trial-and-error' studies that modulate design features and/or operating conditions.
ادامه مطلب
Optimization of mill performance by using online ball and pulp measurements In the platinum industry, by increasing the solid content in the slurry, the product becomes finer. At a higher percentage solid than 73 to 74%, the product becomes coarser again. At this level, a drop in grinding efficiency occurs.
ادامه مطلب
SAG mill discharge control is quite involved due to few interactive variables, such as mill discharge sump level, classification hydro-cyclone variables (feed density, flow and pressure) and water feed rate to the sump. Model predictive control (MPC), which is a multi-input multi-output (MIMO) controller, is very suitable for this purpose. ...
ادامه مطلب
@article{osti_922135, title = {Improving Energy Efficiency Via Optimized Charge Motion and Slurry Flow in Plant Scale Sag Mills}, author = {Rajamani, Raj K}, abstractNote = {A research team from the University of Utah is working to make inroads into saving energy in these SAG mills. In 2003, Industries of the Future Program of the Department of Energy tasked the University of …
ادامه مطلب
Optimizing your SAG Mill. Sanjeeva Latchireddi March 2,2010. As the 'heart of the plant' could be viewed as the milling/grinding area, one of the key steps in plant optimisation is, therefore, ensuring the mill is operating properly.
ادامه مطلب
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.
ادامه مطلب
@article{osti_895022, title = {ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION}, author = {Rajamani, Raj and Delgadillo, Jose and Duriseti, Vishal}, 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 efficient breakage of particles depends on …
ادامه مطلب
SAG mill wear optimization using DEM simulation; Published on: March 13, 2018. Avoiding machine stoppage is a continual challenge in the mining industry, since downtime hours cost valuable production time and money. In the case of semi-autogenous (SAG) mills, these losses can be excessive. SAG mills are the technology of choice for reducing ...
ادامه مطلب