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sag ball circuit


The ratio of SAG hardness (to grind from F80 152 mm to T80 1.7 mm) divided by the Bond ball mill work index was defined as a key factor in the design of a new SAG/ball mill circuit. Simulation techniques that do not consider this ratio may produce erroneous results.

SAG Mill Grinding Circuit Design

circuit is shown in Figure1. It is commonly referred to as a SABC circuit, for Semi-Autogenous Ball mill Crusher (SABC). This circuit shows a semi-autogenous grinding (SAG)/ball mill circuit where both grinding mills are in closed circuit, with the SAG mill closed with a crusher to control the amount of 'critical size' material in the circuit.


A review of SAG circuits closed with hydrocyclones ... to add a recycle crusher to an AG/Ball circuit. Hence the term "ABC" ... the single stage SAG circuit, the SABC circuit would require ...

Autogenous and Semi-Autogenous Mills

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 lower capital cost and lower maintenance cost for an AG/SAG mill circuit and accounts for the current popularity of this type of size

Gold Fields Granny Smith Grinding Circuit: A Metallurgist ...

The single-stage SAG mill circuit was shown to efficient operate ly on primary crushed, Wallaby Deeps underground material. With relatively coarse, competent feed and a reasonable ball charge, the variable speed SAG mill generated a product with sufficient fines content that the cyclones could manage without excessive recycle.

(PDF) Circulating load calculation in grinding circuits

PDF | A problem for solving mass balances in mineral processing plants is the calculation of circulating load in closed circuits. A family of possible methods for the resolution of these ...

sag mill ball mill operations - sbm-impactcrusher.com

SAG Mill Grinding Circuit Design. ... with reduced numbers of unit operations ... SAG Mill vs Ball Mill. Ball Motion inside a SAG Mill. SAG Mill Operation at Cortez: Evolution of Liner … Evolution of Liner Design from Current to Future Operations ... Mill #1 was a conventional rod mill/ball mill circuit ... The SAG mill is 26' diameter x 12 ...


SINGLE STAGE SAG/AG MILLING DESIGN Brian Putland 1, Fred Kock & Leigh Siddall1 Orway Mineral Consultants WA Pty Ltd (OMC) ... even with a high ball charge or mill speed, the circuit selection may be incorrect. If a recycle crusher was not included it should be trialled. If included, the use of a single stage mill is likely to be inappropriate.

Application of Operating Work Indices in Autogenous ...

Mill operators have long used operating work indices to evaluate grinding circuit efficiency, with great utility. Operating work indices can be used to evaluate individual units in a conventional 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 ...

Mill Operators' Conference 2018 - panaust.com.au

semi-autogenous (SAG) mill and two ball mills, each with 13 megawatts (MW) of installed power, was expected to be SAG mill limited when treating competent basement rock. Ausenco Services Pty Ltd (Ausenco), was engaged to help optimise and enhance the productivity of the Phu Kham comminution circuit over an eight-month period.


Even in its current state, the grinding circuit has seen a significant improvement from our SAG and ball mill expert control strategies implemented on the KSX expert system. Our 30 years of experience combined with KSX's power optimization tools can improve any grinding (SAG and ball mill) circuit without needing any additional instrumentation.

Starkey & Associates Inc. - Leaders in Comminution Design

SAGDesign testing provides SAG pinion energy grindability in kWh/t to within +/- 5% from 152 to 1.7 mm, and Bond Ball Mill Work Index on SAG ground ore, from the SAG test on the same sample. Starkey & Associates uses the patented SAGDesign technology to calculate accurate mill sizes from measurements on a client's own ore samples.

Autogenous mills, semi-autogenous mills and ball mills for ...

SAG/ball mill circuit incorporating pebble crushers and a POLYCOM® high-pressure grinding roll. SAG and ball mill for gold ore grinding. One of three SAG mills with 9.75 m diameter and 2 x 4000 kW drive power. These mills operate in conjunction with ball mills for iron ore grinding in Iran.

or 'Mine-to-Mill 2.0' - srk.com

pass through SAG mill onto ball mill circuits ... "What is a competent ore and how does this affect comminution circuit design?", Lane, Procemin 2010 – 7 th International Mineral Processing Seminar (2010), p.33-44. Circuit design vs. feed size staged reduction and


Sagmilling.com 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 available to subscribers.

A comparative - ceecthefuture

proposed circuit consists of a SAG mill 40 feet in diameter and 25 feet in length (EGL), with an installed gearless motor of 24 MW and two 28 feet diameter by 44.5 feet in length ball mills equipped with 22 MW gearless motors. The circuit would operate in SABC-B configuration with two pebble crushers equipped with at least 750 kW motors.

Advanced Controller for Grinding Mills: Results from a ...

Advanced Controller for Grinding Mills: Results from a Ball Mill Circuit in a Copper Concentrator Anoop Mathur, Sujit Gaikwad, Honeywell Technology Center ... throughput-limited ball mills and Semi-autogenous grinding (SAG) mills. Given this large operational benefit, several mineral processing facilities are currently evaluating and ...

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

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 mill circuit. A diagram of types of AG/SAG ...

Grinding Circuit Design for Adanac Moly - sgs.com

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 …

Grinding Circuit - an overview | ScienceDirect Topics

A typical SAG-HPGR-Ball mill circuit suggested by Patzelt et al. [6] is shown in Figure 9.6, where the pebbles from the SAG mill are crushed in the high-pressure grinding rolls. It is a general observation that SAG mills are helpful for grinding where wide variations in the grindability of ores are experienced.

sag circuit ball - chelseaecochamps.co.za

SAG/ball mill circuit incorporating with ball mills for iron ore grinding in Iran Get Price Ball mill Wikipedia A ball mill is a type of grinder used to grind and blend materials for use in mineral dressing The ball mill can grind various ores and other materials either wet or dry Some media such as iron may react with.

Mining comminution – crusher, ball mill, and advanced ...

Smaller pieces will fall through the rock crusher and make their way directly to the SAG mill or ball mill. Mid-sized pieces will get processed by each crusher before arriving at the SAG mill. Other pieces… well they just get stuck in the crusher.


Grinding Circuit Modelling Documentation. This documentation describes the operating and underlying mathematics of the SAGMILLING.COM grinding circuit modelling program. It is intended to be used by the model users who want to operate and understand the functioning of grinding models.

Selection of Comminution Circuits for Improved Efficiency

ball mill . The ideal circuit is easy to operate and maintain, is power efficient and has a low or no steel media consumption. In addition, the size distribution and grinding circuit chemistry may impact on the performance of the downstream circuit (Lane, 1999 and Rantanen, 1996).


P 80, µm is the 80% passing size of the circuit product (expected to be a Bond-compatible size distribution). Availability, expressed as a decimal (0.90 = 90% availability) is used to convert t/h to t/d. Ball mill Operating strategy when circuit is SAG-limited (note, fixed speed ball mills can only be vary P 80) Optional parameters ...

An Expert System for Control of a Sag/Ball Mill Circuit ...

As a counter to this a computer system to provide effective expert help to operators of semi-autogenous (SAG) grinding mills has been developed. This support system is called HelpSAG. It was initially developed for a SAG/ball mill grinding circuit on the gold plant at Paddy's Flat in Western Australia.

Grinding mills – Energy efficient solutions to maximize ...

Every mining operation has a unique grinding process. has experience of over 8,000 grinding mills globally, including manufacturing and delivering the largest SAG/AG mills in the world. Our experts welcome the opportunity to assist you with circuit and circuit control design as well as start-up, operation, and optimization of your mill.

Mill (grinding) - Wikipedia

SAG is an acronym for Semi-Autogenous Grinding. SAG mills are autogenous mills but 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 28 MW (38,000 HP) motor.


conceived as a SAG/BALL circuit (Figure 2 and 3). A major advantage of this design for Phu Kham is the avoidance of fine crushing which is difficult for ores with high clay content, while retaining ability for treating competent rock. ROM ore is crushed by a Fuller-Taylor 54 x 77 NT Primary Gyratory Crusher,

Page 1 Page 2 INTRODUCTION SAG - orway.com.au

Scrub-Ball Scrubber, open circuit classification, followed by a closed circuit Ball Mill SS SAG Primary crushing followed by a single stage SAG Mill SAB Primary crushing followed by a SAG Ball circuit SABC Primary crushing followed by a SAG Ball circuit with recycle crusher ABC Primary crushing followed by a AG Ball circuit with recycle crusher