what must the charge be in a sag mill

Ball Mills - an overview | ScienceDirect Topics

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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor.

factors affecting sag mill perfomance

"Thinner mill liners result in a larger volume inside the mill. This means you can have a higher charge level. Using composite liners also cuts the weight of the liners to about 50 percent of standard steel cast liners, making it possible to work with a higher ball charge level without increasing the total weight of the mill.

sag mill ball charge - rndi.it

The grind-out condition cannot decline below the ball charge level of the SAG mill; if this happens, another warning message is displayed saying the SAG mill speed must be reduced to achieve the target power draw. The model assumes all SAG mills are variable-speed; if a fixed-speed mill encounters this condition, it will completely grind out ...

SINGLE STAGE SAG/AG MILLING DESIGN

concetrator sag mill in pakistan. Sag is an acronym for semiautogenous mills are autogenous mills but use grinding balls like a ball millA sag mill is usually a primary or first stage mills use a ball charge of 8 to largest sag mill is 42 128m in diameter powered by a 28 mw 38000 hp motor. Chat Online

MINE LINERS - Magotteaux

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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.

FL highlights potential throughput increase in SAG ...

Generally, filling the mill by balls must not exceed 30%–35% of its volume. The productivity of ball mills depends on the drum diameter and the relation of ∫ drum diameter and length. The optimum ratio between length L and diameter D, L : D, is usually accepted in the range 1.56–1.64.

charge on sag mill

Frozen charge detection and automatic loosening with gearless mill drives (SAG Conf. 2015) Mill drives: the desire for increased power and the associated limits and conditions (SAG Conf. 2015) The engineering and process effects of choosing a motor design speed (SAG Conf. 2015)

How to calculate ball/sag mill charge level? - Grinding ...

What Must The Charge Be In A Sag Mill. 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. ...

factors affecting sag mill perfomance

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Grinding. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else's ...

Modelling SAG milling power and specific energy ...

SAG Mill Grinding Circuit Design. Oct 12 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into pieces The ball charge of a SAG mill is about 9 to 20 This process takes place inside the large rotating drum of SAG mill which is filled with balls partially

what must the charge be in a sag mill

Figure 2: Pilot Plant kg/hr Vs Charge % by Volume This data is indicative of trends that were happening in the 3-ft. diameter SAG pilot mill. They have not been proven in large commercial scale mills. Because the grinding operation could be viewed through the open end of the SAG mill, it was evident that maximum throughput occurred

Gearless Mill Drives | Beneficiation | Global

"Thinner mill liners result in a larger volume inside the mill. This means you can have a higher charge level. Using composite liners also cuts the weight of the liners to about 50 percent of standard steel cast liners, making it possible to work with a higher ball charge level without increasing the total weight of the mill.

Estimate Mill Steel OR Rock Charge Volume

Generally, filling the mill by balls must not exceed 30%–35% of its volume. The productivity of ball mills depends on the drum diameter and the relation of ∫ drum diameter and length. The optimum ratio between length L and diameter D, L : D, is usually accepted in the range 1.56–1.64.

types of charges in sag mill

balls on the rocks (SAG mill) or by interaction between rocks on the one side and mill shell and toe of the grinding charge on the other side (FAG mills). The trajectories of grinding media and rocks promote size reduction by im-pacts. This grinding mechanism is required in SAG and FAG mill …

sag mill ball charge - casadicurascarnati.it

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.

types of charges in sag mill

To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN Use Add New Topic to ask a New Question/Discussion about Grinding. OR Select a Topic that Interests you. Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent). Using Add Reply allows you to Attach Images or PDF files and provide a more complete input. Use Add Comment = to comment on someone else's ...

Quantifying and improving the power efficiency of SAG ...

SAG Mill Grinding Circuit Design. Oct 12 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding These mills utilize the balls in making the large fragments of materials broken into pieces The ball charge of a SAG mill is about 9 to 20 This process takes place inside the large rotating drum of SAG mill which is filled with balls partially

effect of balls charge on sag mill performance

This is a 2nd Method for estimation or measuring the steel charge volume inside a mill. If dealing with a full SAG/AG mill, this will give you the rock load%. If you ...

sag mill ball charge - rndi.it

Jul 08, 2019· Measuring SAG Mill Charge and the Increased Benefits of Utilizing Accelerometers for Positioning ... must rely on knowing the exact position of the sensor in …

Ball Mills - an overview | ScienceDirect Topics

SAG Mill Grinding Circuit Design. 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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor. 【Get Price】

Mill Charge - an overview | ScienceDirect Topics

SAG is an acronym for semi-autogenous grinding. SAG mills are autogenous mills that also 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 …

Sag Mill Optimum Charge Size - joelle-nails.de

Oct 12, 2017· SAG mill make use of steel balls included with some large and hard rocks for grinding. These mills utilize the balls in making the large fragments of materials broken into pieces. The ball charge of a SAG mill is about 9% to 20%.This process takes place inside the large rotating drum of SAG mill which is filled with balls partially.

Choosing a SAG Mill to Achieve Design Performance

Feb 01, 1994· Consider the following situation. Assume that the total power required to mill the ore from the SAG mill feed size to the desired product size has been accurately determined from the test data. If the SAG mill actually grinds to a finer size than the design, then breakage mechanism in the mill must be different from that assumed in the design.

Difference Between Sag Mill vs Ball Mill - mech4study

The SAG mill had a 68 ball charge and the power consumption was 8 kWht which agreed well with the expected value. 9.6. Problems. 9.1. In an SAG mill the dimensions of the mill were 9.75 m 3.5 m and the specific gravities of the mineral and that of the balls charged were 4.1 and 7.9 respectively.

effect of balls charge on sag mill performance

Care must be taken in the design of the pilot circuit. Areas requiring particular attention are the preparation of the feed and the design of the classification circuit. The feed size must be realistic as an inappropriate particle size distribution (PSD) ... 4 High ball charge SAG mill or ROM Ball mill (15 to 25% ball charge) Low competency ore ...

Ball Size Analysis in SAG Grinding - Grinding ...

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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor.

Concentrator Sag Mill Kennecott Antwerpse Havenpijl

In Mineral Processing Design and Operations (Second Edition), 2016. 9.3.4 Mill Speed. During normal operation the mill speed tends to vary with mill charge.According to available literature, the operating speeds of AG mills are much higher than conventional tumbling mills and are in the range of 80–85% of the critical speed.

Modelling: Transfer size limits - SAGMILLING.COM

SAG Mill Grinding Circuit Design. 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' (128m) in diameter, powered by a 28 MW (38,000 HP) motor. 【Get Price】