DeSIgN CriterIa for sag mIll and BaLL mIll

SAG Mill Grinding Circuit Design - 911metallurgist

2016-6-6 · SAG Mill vs Ball Mill. Ball Motion inside a SAG Mill. Ball Motion inside a Ball Mill. To a more significant degree than in other comminution devices, liner

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

2019-11-26 · 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 ...

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SAG Mill Liner Design - Mineral Processing & Metallurgy

2016-6-6 · End and shell liner design in these mills is much the same as for SAG mills. The effect of liner design on performance is equally as important. For

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Design of the 40 foot SAG Mill Installed at the Cadia

basis was a SABC circuit of 8% ball charge. Maximum SAG mill power was determined by deducting the installed ball mill pinion power of 7.95 kWh/t from the maximum overall circuit power of 16.7 kWh/t to give 8.75 kWh/t. Overall power for

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SAG Milling in Australia -Revised Submission

2014-10-1 · Developments in SAG Mill Design and Operation Over the last few years, SAG mill manufacturing technology has advanced rapidly. The bounds of mill size have been pushed from two directions. Firstly, the advent of ring motors has removed the constraint applied by the power that a single pinion gear was able to transmit.

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

2021-12-31 · The AG/SAG circuit discharge P80 is now increasingly referred to as the “Transfer Size” or T80 for short. From the literature it is apparent that in

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C O N S U L T I N G L T D TECHNICAL MEMORANDUM

EF5BM=[ P80+10.3 1.145×P80] ( 3 ) The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used to calculate the optimal feed size) and because this is a “single-stage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball

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Grinding Circuit Design for Adanac Moly - SGS

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 mill feed size (Kosick and Bennett, 2001).

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COMMINUTION Comminution conundrum

2020-10-10 · diameter x 7 m long SAG mill and two 7.9 m diameter x 11.6 m long ball mills including the immediate release for manufacture of the critical lead time components. Once installed, these machines will be the largest operating mill units in North America, capable of processing between 28,000 and 40,000 t/d, depending on final design criteria.”

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TECHNICAL NOTES 8 GRINDING R. P. King

2009-7-30 · LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

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A CRITICAL REVIEW OF GRINDING DESIGN

2021-1-8 · • Transfer size (T80) is the term used to describe the SAG mill product that is sent to the ball mill. For peak performance and balancing the power available in the SAG mill and ball mill, the transfer size must be measured and controlled. • The transfer size will be 500 microns using a 12mm opening trommel. This can be true under special

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Comminution Circuit Design for the Constancia Project

2018-2-20 · The twin 16 MW SAG mills and twin 16 MW ball mills with the installation of the pebble crusher deferred to Year 6 resulted in: • SAG mill throughputs maintained at 3170 t/h for the initial 6 years without pebble crushing • The ball mills were potentially slightly overloaded after Year 6 producing a P80 of between 120 and

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C O N S U L T I N G L T D TECHNICAL MEMORANDUM

EF5BM=[ P80+10.3 1.145×P80] ( 3 ) The EF4 formula requires both the rod mill and ball mill work index (rod mill Wi is used to calculate the optimal feed size) and because this is a “single-stage ball mill” calculation, the F80 is actually the rod mill feed size (10,000 µm) from Table 1 and the P80 is the ball mill circuit product. The EF5 factor only applies below 75 µm to ball

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

2021-12-31 · The AG/SAG circuit discharge P80 is now increasingly referred to as the “Transfer Size” or T80 for short. From the literature it is apparent that in circuit design some approaches to the ...

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Chapter - M MODELLING, SIMULATION, OPTIMIZATION

2013-5-9 · 2.1 SAG mill modeling In MODSIM, one of the simulation models used for a SAG mill unit is SAGT (Semi-Autogenous Grinding with Trommel) model. In this model, a SAG mill with a trommel screen at mill discharge is modeled using the full population balance including particle attrition and wear (King 2001b). In this

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Achievement of High Energy Efficiency in Grinding Mills

2018-2-20 · SAG Mill Ball Charge The SAG mill was simulated to require a 10-12% ball charge with a top size of 125mm. During the commissioning phase no balls were required to be added to the SAG mill to achieve the target throughput of 575tph. This allows for great flexibility in the future and significant security for the future.

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Advanced Simulation for Semi-Autogenous Mill Systems:

2018-9-25 · The model output variables are: power-draw, load level, ball load, mineral discharge rate and size distribution, water discharge rate, ball throughput, bearing pressure, pebble throughput, and toe and shoulder angles of the internal load. 2.1 SAG mill model The particles fed to the mill are ground in the milling chamber and subsequently

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TECHNICAL NOTES 8 GRINDING R. P. King

2009-7-30 · LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

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COMMINUTION Comminution conundrum

2020-10-10 · diameter x 7 m long SAG mill and two 7.9 m diameter x 11.6 m long ball mills including the immediate release for manufacture of the critical lead time components. Once installed, these machines will be the largest operating mill units in North America, capable of processing between 28,000 and 40,000 t/d, depending on final design criteria.”

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SmartMill - Grinding | ABB

Combine ABB's variable-speed drive system with advanced process control - ABB Ability™ Expert Optimizer for grinding - to provide maximum mill control. It can be applied to new or existing AG, SAG and ball mills, powered by either ring

Read More
Design of the 40 foot SAG Mill Installed at the Cadia

basis was a SABC circuit of 8% ball charge. Maximum SAG mill power was determined by deducting the installed ball mill pinion power of 7.95 kWh/t from the maximum overall circuit power of 16.7 kWh/t to give 8.75 kWh/t. Overall power for

Read More
Grinding Circuit Design for Adanac Moly - SGS

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 mill feed size (Kosick and Bennett, 2001).

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SAG MILLING - secures two more orders - Canadian ...

2006-11-12 ·  will supply an 11.5-m-diameter SAG mill and two 8-m-diameter by 11.6-m-long ball mills. Once installed, these machines will be the largest operating mill units in North America, capable of processing between 28,000 and 40,000 t/d, depending on final design criteria. The Malartic property is believed to have a 3-4-million-oz gold potential.

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COMMINUTION Comminution conundrum

2020-10-10 · diameter x 7 m long SAG mill and two 7.9 m diameter x 11.6 m long ball mills including the immediate release for manufacture of the critical lead time components. Once installed, these machines will be the largest operating mill units in North America, capable of processing between 28,000 and 40,000 t/d, depending on final design criteria.”

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Adriatic Metals plc Pre-Feasibility Study Metallurgy and ...

2020-10-15 · The grinding circuit consists of a SAG mill, ball mill and cyclones. The grinding circuit will be designed to reduce ore from an 80% passing size of 76mm to 40µm. The SAG mill will be a single pinion low aspect mill, operating in a closed circuit. The mill has an inside diameter of 3.8m and an effective grinding length (EGL) of 5.0m. The mill ...

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SAG MILL DISCHARGE SCREENS-TROMMEL vs.

2013-12-22 · SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony Moon, RTZ What I’d like to talk about is probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use ... was proposed. We were getting to the point where, given our criteria for sizing these. 24

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TECHNICAL NOTES 8 GRINDING R. P. King

2009-7-30 · LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62. Gross power No load power Net power drawn by the charge (8.13) The net power is calculated from Net power KD2.5L e! c./ Watts (8.14) In equation 8.14, D is the diameter inside the mill liners and Le is the effective length of the mill including the ...

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A Method to Determine the Ball Filling, in Miduk Copper ...

2022-1-5 · autogenous (SAG) Mill via an utilized method. Miduk copper concentrator is located in Kerman Province, Iran, and its size reduction stage includes one gyratory crusher which feeds one SAG mill (9.75 dia.(m)*3.88 length(m)) following two parallel ball mills (5dia.(m)*7lenght(m)). After SAG mill, a

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Manual design of SAG/ball/rod mill foundations ...

2007-3-14 · RE: Manual design of SAG/ball/rod mill foundations youngstructural (Structural) 7 Mar 07 18:27 I have a bit of a long answer here, so I'll give you a synopsis: I don't think an design can be produced manually, and I think a preliminary design could

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SmartMill - Grinding | ABB

Combine ABB's variable-speed drive system with advanced process control - ABB Ability™ Expert Optimizer for grinding - to provide maximum mill control. It can be applied to new or existing AG, SAG and ball mills, powered by either ring

Read More

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