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Sag Circuit Ball

ball mill and sag circuit mining diagram

Mar 25, 2019· With more ore consistency, the circuit could be changed. A possible circuit change would send the crusher discharge to the ball mill circuit, better balancing the work between the SAG and ball mill. When ball mill-limited and with low ore variability, a similar circuit …

an expert system for control of a sag ball mill circuit

GRINDING CIRCUIT The grinding circuit for the Copper Mountain project consists of one FL SAG mill and two FL ball mills. Figure 1 - Overview grinding circuit The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long.

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

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 …

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

When operating a grinding circuit (at Granny Smith) under a wide range of conditions: campaigning very competent underground ore followed by soft oxide, primary versus secondary crushed feed and finally single-stage SAG and conventional SAG, ball mill and ...

Mill (grinding) - Wikipedia

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

SAG Mill Grinding Circuit Design

Feb 18, 2019· Ball Mill Design/Power Calculation LinkedInA wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80% passing ? inch (6350 ...

Model Predictive Control for SAG Milling in Minerals ...

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

Paper # 25 - Copper Mountain Overview on the Grinding ...

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.

Optimizing Performance of SABC Comminution Circuit of the ...

in a closed circuit dry grinding environment. The ground product for the laboratory SAG mill is then submitted to the Bond ball mill work index test. The number of SAG mill revolutions required to grind the material to a P 80 of 1.7 mm is used to predict AG/SAG specific energy using quation 4. Correction E

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

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.

Addition of pebbles to a ball-mill to improve grinding ...

Dec 24, 2018· Grinding in Ball Mills Modeling and Process Control. Keywords Ball mills, grinding circuit, process control. I. Introduction Grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical, mechanical and chemical characteristics. Typical ...

Modelling SAG milling power and specific energy ...

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 slot size and initiating the overall expert system into the control. ...

Orway Mineral Consultants Canada Ltd. Mississauga, ON ...

However, the "Standard" circuit specific energy can be used in a relative manner to compare the expected behaviour of different ores in AG/SAG milling in exactly the same way as the Bond laboratory ball mill work index can be used to compare the relative grindability of different ores in ball milling (Bond, 1961 and Rowland and Kjos, 1980)

The appropriateness of the transfer size in AG and SAG ...

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 ...

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

SAG mill, ball mills, grinding circuit, Process Get a Price. images ball mills circuits regencypark.co. Over the years, ball mill circuits closed with cyclones have become an industry standard, and since the early days, it has been recognised that classification efficiency and …

Application of Operating Work Indices in Autogenous ...

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.

process flow diagram for sag mill - binsbergenpipes.co.za

Model Predictive Control for SAG Milling in Minerals Processing Steven J. McGarel, Rockwell Automation Introduction SAG and ball mills are generally accepted as the largest power consumers in a mining and mineral processing operation and can be 80% of total electrical energy consumed at a specific power consumption of around 20kWh/ton.

grinding circuit camfield grinding - ewags.org

The appropriateness of the transfer size in AG and SAG Mill Circuit Design. ... to be used to predict the SAG mill circuit and ball mill circuit speci fic energies it is important to asc ertain: 1.

COMMISSIONING OF THE 375ktpm AUTOGENOUS MILLING …

GOLD FIELDS GRANNY SMITH GRINDING CIRCUIT: A METALLURGIST'S JOURNEY OF PROGRESSION *Adrian Dance1 and Andrew Radford2. 1SRK Consulting (Canada) Inc. 2200 – 1066 West Hastings St. ... At the end of 2010, the SAG mill ball size was changed to …

grinding circuit camfield grinding - ewags.org

3.2.1 Primary FAG/SAG Mill Circuit Ore is withdrawn from the conical stockpile via 2 of 4 apron feeders and delivered to the primary mill feed conveyor. A semi-automatic ball loading system is available to load steel balls onto the mill feed conveyor. The fresh feed ore size detection is done via a …

ball and sag mill circuits - ewags.org

Dec 24, 2018· Grinding in Ball Mills Modeling and Process Control. Keywords Ball mills, grinding circuit, process control. I. Introduction Grinding in ball mills is an important technological process applied to reduce the size of particles which may have different nature and a wide diversity of physical, mechanical and chemical characteristics. Typical ...

THE COMMINUTION CIRCUIT DESIGN FOR THE CONSTANCIA …

The circuit consists of a 60 x 113 primary crusher, two 16 MW SAG mills and two 16 MW ball mills. All four mills are twin pinion with wound rotor motor and gearbox drives. Provision for pebble crushing is provided for primary (hypogene) ore treatment later in mine life. The derivation of the mill's specific

Starkey & Associates Inc. - Leaders in Comminution Design

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 …

Data from a large SAG-ball mill circuit used to set test conditions. • Balls and pebbles up to 75 mm, milling at 75% critical, feed size up to 19 mm. • Power saving 13% when using composite load (pebbles 25% charge volume). • Ball consumption reduced by 25% (inferred). • …

Autogenous and Semiautogenous mills -

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.

INCREASING SAG MILL CAPACITY AT THE COPPER …

The primary mill circuit comprises the primary ball mill, sump, hydrocyclone cluster and rougher flotation units. A process narrative of the circuit is presented below: Ore with a nominal size of passing 8mm is reclaimed from the . Model Predictive Control of SAG Mills and Flotation Circuits. ABSTRACT.

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

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

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.

Increasing production by removing comminution circuit ...

With more ore consistency, the circuit could be changed. A possible circuit change would send the crusher discharge to the ball mill circuit, better balancing the work between the SAG and ball mill. When ball mill-limited and with low ore variability, a similar circuit modification redirecting flows can be done.

Optimizing your SAG mill operation - International Mining

GOLD FIELDS GRANNY SMITH GRINDING CIRCUIT: A METALLURGIST'S JOURNEY OF PROGRESSION *Adrian Dance1 and Andrew Radford2. 1SRK Consulting (Canada) Inc. 2200 – 1066 West Hastings St. ... At the end of 2010, the SAG mill ball size was changed to …

Grinding Circuit Overload - Grinding & Classification ...

Model Predictive Control for SAG Milling in Minerals Processing Steven J. McGarel, Rockwell Automation Introduction SAG and ball mills are generally accepted as the largest power consumers in a mining and mineral processing operation and can be 80% of total electrical energy consumed at a specific power consumption of around 20kWh/ton.

Model Predictive Control for SAG Milling in Minerals ...

circuit, comprised of a 6.1 m diameter x 2.74 m long SAG mill and a 4.1 m diameter x 5.5 m long secondary ball mill in closed circuit with cyclones, was built using SAG Power Index and Bond Ball Mill Work Index testing to determine the grinding energy requirements.

Comminution circuit bottlenecks – How to increase plant ...

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

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

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 …

DESIGN OF AG/SAG MILL CIRCUITS USING THE SMC TEST

DESIGN OF AG/SAG MILL CIRCUITS USING THE SMC TEST . By Stephen Morrell ... (SAG) and ball mill circuits are used to show that Bond's equation does …

Optimizing Performance of SABC Comminution Circuit of the ...

The Copper Mountain comminution circuit originally consisted of a 34' x 20' F/F SAG mill (17,000 hp - 12,677 kW), two (2) 24' x 6" ball mills (17,000 hp 39' 12,677 kW) and a Raptor XL900 pebble crusher - (900 hp - 671 kW). The comminution circuit product (cyclone overflow) feeds the rougher flotation circuit.

DESIGN OF THE KUBAKA GRINDNG CIRCUIT USING SPI AND …

Grinding & Classification Circuits. ... (this should also reduce the circulating pebble load in the SAG circuit). If your ball mill is drawing less than the full installed power while operating, add grinding steel - if the mass of additional steel drives the bearing pressure higher, it should be offset at least partially by reduced solids ...