sag mills circuit

sag mill circuit -

SAG Mill Grinding Circuit Design - 911 Metallurgist Jun 4, 2018 AG and SAG mills are now the primary unit operation for the majority of In this case, the harder fraction of the mill feed builds up in the mill load (by using bins, or alternately and more costly, a pebble stockpile); Granny Smith (Australia), Geita Gold (Tanzania), St Ives ...

Modelling SAG milling power and specific energy ...

approach the total specific energy of the entire AG/SAG circuit is firstly predicted using the SAG mill feed F80 and the ball mill cyclone overflow P80. Morrell's model (Morrell, 2011) relates the feed, mill geometry and operating conditions to the specific energy of the circuit. However, the F80 is not enough to represent properly

SAG Mills and Ball Mills - YouTube

Dec 21, 2016· 2 parallel SAG Mills each feeding 2 parallel Ball Mills (4 total). Around 50,000 TPD total grinding circuit capacity.

A = 69.3, b = 0.54 and Axb = 37.4 (Wtd Fit)

Of course, the specific energy value quoted for the "Standard" AG/SAG circuit will not necessarily match the specific energy required for an existing or a planned AG/SAG mill due to differences in the many operating and design variables such as feed size distribution, mill dimensions, ball load and size

an expert system for control of a sag ball mill circuit

an expert system for control of a sag ball mill circuit. an expert system for control of a sag ball mill circuit. egl sag mill, a raptor pebble crusher and two x ball mills.circuit design, the various optimization steps taken and impacts, together with .screen opening …


2 AG mill + a recycle crusher Competent ore - relatively homogenous (the recycle crusher is used to balance the rate of impact breakage within the circuit) 3 SAG mill (8 – 15% ball charge) Variable competency ore 4 High ball charge SAG mill (15 to 25% ball charge) Incompetent ore 5 Low ball charge SAG mill, high mill speed.

Design SAG mill production when you need it most: In day 1 ...

pressure on mill sizing has resulted in non-flexibility in new SAG mill circuit designs. In order to defend the mill size selected, the owner's engineers need to be able to quantify the loss in productivity that will occur if the SAG mill is downsized. Power based methods allow this calculation to be executed rapidly with good accuracy.

Dynamic modeling and simulation of a SAG mill-pebble ...

In this circuit, two SAG mills have the same throughput, feed rate and the recycling load. Below all the simulation results are from SAG mill 1. The first graph shows that the throughput of the SAG mills is affected by the pebble crusher settings. A cone crusher with settings like CSS = 28 [mm] and speed = 280 [rpm] gives coarser product than a ...

Comminution Services - SGS

orebody characterisation and circuit simulation. SGS' comminution pilot-plant capabilities are headlined by the 1.68 m diameter, fully instrumented autogenous mill, followed by a wide variety of rod and ball mills. Circuit configurations, including AG, SAG, ABC or SABC, are evaluated easily. The circuit employs an integrated

sag circuit mill -

PAI SAG Mill Training YouTube. Jan 08, 2016· In this training module, we'll cover the workings of a semiautogenous grinding mill, or SAG mill, that's designed to be the first stage of a grinding circuit.

process flow diagram for sag mill -

The diagram shows the fine ore feed belt bringing ore from the feeders under the stockpile to the SAG mill. Integrated advanced process control with a sag mill FL. SAG mill in. Peru (Garcia & Villanueva, 2013 [1]). Antapaccay's flow sheet is shown in Figure 1 below. Figure 2 shows the copper concentrator photographed after commissioning.

SAG & Ball Mill Grinding Circuit - YouTube

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Application of Operating Work Indices in Autogenous ...

circuit or the overall performance of an autogenous-semiautogenous (AG-SAG)/ball mill circuit, but they are of limited value in evaluating AG-SAG and ball mill sections separately. This problem arises due to the difficulty of describing particle size distributions with different shapes by one number, the eighty percent passing size. This

Grinding Circuit Design for Adanac Moly -

in a SAG and Ball mill circuit where there is no scope for storage capacity between milling stages and throughput is normally limited by a bottleneck at one stage or the other. In this case any ore with a high BWi value will have reduced . throughput due to the ball mill despite the capability of the SAG mill …

ball and sag mill circuits -

Optimizing your SAG mill operation International Mining. In multi stage ABC/SABC circuits, the AG or SAG mills are in closed circuit with screens and pebble crushers. The mill discharge from these mills consists of slurry, which goes to the ball mills for further grinding, and coarse pebbles/rocks, which are crushed and sent back to the mill.


USING THE SMC TEST® TO PREDICT COMMINUTION CIRCUIT PERFORMANCE INTRODUCTION As the SMC Test ® produces the JK parameter values A and b as well as estimates the JK parameter ta and crusher model energy matrices, the SMC Test ® can be used to conduct AG/SAG mill and crusher circuit simulations through the use of JKSimMet. Independent

SAG Mill Liner -

Based on experience, mill liner designs have moved toward more open shell lifter volumetric capacity and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. Mill throughput is maximized with shell lifters between ratios of 2.5:1 and 5.0:1.

SAG Mill Grinding Circuit Design

Table of Contents Autogenous Grinding CircuitsSAG vs Ball Mill AdvantagesAG & SAG Mill Grinding Compared – Which is BestTesting for Product Size Size reduction is the most expensive operation in most mills. Crushing and grinding usually require the greatest portion of capital costs and often make up 60-70 percent of total mill operating costs as shown in Figure 1.

Autogenous and Semi-Autogenous Mills | FL

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.

Mill (grinding) - Wikipedia

PDF | Kinross Paracatu and Process Technology and Innovation (PTI) have reviewed and optimized the operating strategies for the SAG mill circuit at Paracatu operation in Brazil. The focus of ...


SINGLE STAGE SAG/AG MILLING DESIGN ABSTRACT Single stage semi-autogenous / autogenous (S/AG) milling has become a common design for a variety of ore ... a single stage S/AG mill circuit. 1) Characterisation of the ore using bench tests. 2) Determining if the use of a single stage circuit is appropriate, using defined selection criteria.

Autogenous and Semi-Autogenous Mills - ScienceDirect

open circuit SAG mill, 2. ... Several workers have attempted to determine the power draw for autogenous and semi-autogenous mills,,, . For autogenous mills, like the dry Aerofall mills, MacPherson and Turner established that the power consumption was a function of mill diameter and length. For dry commercial AG mills they derived the power as

Grinding 3 - Circuits - Edumine Online Course

A course for process engineers, mill operators and students. Grinding Circuits is the third of a suite of three courses on grinding theory and practice from Performance Solutions. Topics include Grinding Circuit Basics, AG and SAG Mill Circuits, and Ball and Rod Mill Circuits.

Selection oof Comminution Circuits for Improved Efficiency

Selection of Comminution Circuits for Improved Efficiency Greg S Lane Principal Process Engineer, GRD Minproc Limited ... (SAG) and ball mill (SAB) circuits. This progression has, not necessarily, been accompanied by an ... ball mill The ideal circuit is easy to operate and maintain, is …

Optimizing your SAG mill operation - International Mining

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. ... In multi-stage ABC/SABC circuits, the AG or SAG mills are in closed circuit with screens and pebble crushers. The mill discharge ...

Autogenous and Semi-Autogenous Mills

AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill, and some or all of the work of a ball mill. Because of the range of mill sizes available, AG/SAG milling can often be accomplished with fewer lines than in a conventional rod mill-ball circuit. All of the above contributes to

Autogenous and Semiautogenous mills -

Simplifying wet grinding with AG/SAG mills AG/SAG mills are often the optimum solution for wet grinding (achieved in a slurry 50 to 80 percent solids). AG/SAG mills can accomplish the same size reduction work as two or stages of crushing and screening, a rod mill, and some or all of the work done by a ball mill.

Starkey & Associates Inc. - Leaders in Comminution Design

Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client's own ore samples. SAGDesign technology has become a standard for 21 st century grinding circuit design for the following reasons: Precisely measures SAG and ball mill …