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 ...

The largest SAG mill is 42' in diameter, powered by a 28 MW (38,000 HP ) motor. A SAG mill with a 44' diameter and a power of 3 5 MW (47,000 HP) has been designed.

The two main functions of a mill liner consist in protecting the mill shell against wear and in transmitting the energy of the mill motor to the grinding charge to carry out the required size reduction in the most efficient way. For a mill liner, the design as well as the liner material are to be considered. The required movement of the mill charge to carry out effi-

If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy …

Charge Motion inside a SAG Mill. For proper design of SAG mills and other types of grinding mills, the operating conditions have to be defined. Predicting the …

The geometry of a mill with conical ends is shown in Figure 8.6. The total volume inside the mill is given by Vm 4 D2 mL 1 2(Lc L) L 1 (Dt/Dm) 3 1 Dt/Dm (8.16) The density of the charge must account for all of the material in the mill including the media which may be steel balls in a ball mill, or large lumps of ore in an

The Mill Manager will be responsible for the safe and efficient operation of the 62,500 tpd concentrator, which includes employees in the departments of mill operations, on-site laboratories, and the metallurgical department. The mill consists of a primary gyratory crusher and secondary crushing circuit feeding a gearless motor drive 40' SAG ...

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. Obtener precio

Rod mill charges usually occupy about 45% of the internal volume of the mill. A closely packed charge of single sized rods will have a porosity of 9.3%. With a mixed charge of small and large diameter rods, the porosity of a static load could be reduced even further. However, close packing of the charge rarely occurs and an operating bed ...

When mill diameter and mill power became again increased, only the Gearless Mill Drive (GMD) could be envisaged to cover this requirement above 10 MW. The GMD is by its nature a variable speed drive system. Process operators, once having the facility of adjustable speed, could not live anymore without it for SAG mills.

SAG/AG SCU SAG/AG Sentinel Camera Unit (SCU) Concept of System. The SCU uses the latest technology in high-definition imagery within a custom designed housing, permanently affixed to the feed chute to provide a live audio and temperature feed in a running SAG mill and video feed from inside a stationary SAG mill.

For proper design of SAG mills and other types of grinding mills, the operating conditions have to be defined. Predictingposition of the SAG mill charge is a difficult task since a number of significant phenomena associated with the charge motion must be taken into consideration.

the AG/SAG mill throughput, which in turn is driven by the dynamic of the ore. The traditional approach to measure the specific energy requirement was to run a pilot plant, in which the mill feed rate is controlled to maintain a constant mill charge set-point. The MacPherson mill is operated exactly the same way,

Must The Charge Be In A Sag Mill. The profile can be better customised to suit mill speed and filling and therefore optimise performance, and it allows more material in the lifter for a given base width, but the mill must only run in one direction.7.Highlow double wave ball …

Mill (grinding) Wikipedia. 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.

Austin SAG model (hybrid phenomenological and empirical model) the models predict what power the mill charge geometry could draw assuming the motor can provide it. You must manually check the motor's tent diagram to confirm that the predicted power draw is …

SAG Mill Circuit Example — Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is …

The modeling and simulation of semiautogenous (SAG) mills have been widely used in the design and optimization of mill performance in terms of its power draw, processing capacity and product size distribution. However, these models are solved under steady approximation and do not provide any information on mill charge distribution in real time. This paper attempts to characterize mill contents ...

Ball Charge Motion inside a SAG Mill. With a higher density mill charge. SAG mills have a higher installed power density for a given plant footprint relative to AC …

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.

Notes: AG and SAG mills – the coarse grind 20 Autogenous (AG) mills use large particles of ore as grinding media. For an ore to successfully grind autogenously, the ore must be hard and it must break along boundaries between mineral grains to produce particles large enough to grind the remaining particles to sufficiently fine size. If an ore ...

ERSEL Ağır Makine San. ve Tic. A.Ş. Toggle navigation. * Semi-autogenous (SAG) grinding is a grinding process carried out with small amount of ball charge (4-15%) unlike ball mills and with the help of bigger parts crumbling the smaller parts of ore. * To achieve this type of grinding, SAG mills with large diameter and short length have been ...

Sag mill range APPLICATION ENVIRONMENT For SAG milling applications, the diameter of the balls, mill and throw action of the charge provide for a high impact environment - therefore a balance must be achieved between abrasion resistance and …

The mill must stop rotating when a locked charge is detected to prevent the charge from being lifted and dropped. The Locked Charge Detector is mainly controlled from the main control room. A local PanelView display is located nearby the mill.

201982SAG is an acronym for SemiAutogenous 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 . Oline Chat

mill discharge product size in relation to the lifting effect of the liners. In this specific case, it is obvious that a certain load expansion is needed to allow the coarse particles entering the media charge to be reduced. Therefore, at this stage, a direct measurement of the dynamics in the mill gives very valuable information to the operator.

The ore charge contained within the conical ends of course must also be considered in calculating the total charge weight. Figures 3a and b, and 4a and b …