The SAG Mill is a machine added by Ender IO.It uses Micro Infinity (µI) to grind (or mill) items into their crushed variants, like Ores into Dusts.The SAG Mill has four output slots; recipes can have 1-4 different outputs, with different chances of obtaining those outputs. Uniquely, the SAG Mill can use Grinding Balls made from various materials to increase energy efficiency …

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Since the early 1980s, we have been designing and manufacturing Semi Autogenous Mill (SAG Mill) and Autogenous Mill (AG Mill) under the Fuller-Traylor brand. Semi-autogenous grinding uses a minimal ball charge in the range of 6-15% while autogenous grinding uses ore only. SAG and AG Mills operate by lifting ore/grinding media and dropping it on ...

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where m p is in kW; D is internal mill diameter (meters), L is internal mill length (meters); J is total fractional charge loading of the mill; J B is the fractional mill filling by balls; ε B is the effective porosity of the charge, taken as 0.3; ρ s and ρ b are true densities of rock and balls (tons per cubic meter), respectively; w c is the weight fraction of rock in water and rock in ...

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Brian Loveday published a simple SAG mill model (Loveday, 1978) of the form in Equation 2. The equation uses mill dimensions (inside the liners), the density of the mill charge and an empirical "power number" that encapsulates the mill speed and volumetric filling. .0 %(1 234 (2) Where: • D is the mill diameter inside the liners, m

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Jtotal, mill charge filling, (v/v) the proportion of the internal volume of the mill that is consumed by the mill charge. This is the combined charge of grinding balls and ore solids and would be measured in a mill crash-stop. Jballs, ball charge filling, (v/v) the proportion of the internal volume of the mill that is consumed by the balls ...

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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 ...

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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 …

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Enter the number of lifters that are exposed above the mill charge. Fractions are acceptable and should be used in the case where the charge does not sit uniformly in the mill. For example, you may have 29 rows exposed at the discharge end of the mill, and only 28 exposed at the feed end.

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Usually the charge volume of SAG mills occupy between 30-40% of its internal volume at which the grinding rate is maximized. When the charge volume is more, then the throughput suffers. The fill level is monitored by mill weight measurement as …

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SAG Mill Discharge. Controlling the feed and discharge of a mill is mostly a stabilisation exercise – you need to be able to quickly and accurately control the mill feed rate. If the mill feed setpoint is changed, then the actual feed rate needs to stabilise at the new target in a short period of time. The feed rate setpoint can then be tied ...

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In semi-autogenous grinding (SAG), the grinding mill inventory, (i.e. volume of total charge, volume of ball charge, etc.) is important in determining the optimum operating condition for maximum production (tph), minimum specific energy (kwh/t) or lowest cost ($/t). A two-dimensional graphical method is presented for determining the actual ball charge within the …

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SAG Mill Components. Once the basic operating conditions have been defined for the mill designer then, and only then, can he begin taking into account shell and head stresses and trunnion bearing sizes required to carry the load …

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History. The SAG mill model by proposed by Leonard Austin (1990) was largely based on modifications of earlier tumbling mill models by Hogg & Fuerstenau and F. Bond. The model uses a kinetic-potential energy balance to describe the power draw of a mill charge. Many geometric components of the earlier models were fit to empirical relationships measured by …

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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 …

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son–Deswik mill (now the FLS stirred mill), is a relative newcomer to the stirred milling scene, having been developed through the 1990s and the early 2000s.[5] In all these mills, a bed of ceramic or sand is stirred at high speed. Ceramic media sizes in use range from 1 to 6.5 mm. The Isamill and the SMD have very similar grinding performance.

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SAG mill is rated at 29 MW and 78% C.S., with a 42 ft dia. mill built but not yet operational. The more recent option of operating at higher ball charge volumes (15% v/v to 20% v/v) has in turn led to higher motor power ratings. Figure 2: On achieving enhanced operating capability to 18% v/v ball

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You must manually check the motor's tent diagram to confirm that the predicted power draw is actually within the motor's capability at the indicated speed. Liner and grate design. The design of mill liners and SAG mill discharge grates will have a large effect on how efficiently the mill operates and the circuit throughput.

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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. …

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It transforms the mill rotation into charge motion and both profile and spacing must be carefully selected to suit each specific mill. When designing a shell lining, Outotec considers the type of grinding, mill size and speed, maintenance schedules, safety, impact levels, efficient use of materials, and many other parameters.

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The mill design allows the rate of generation of fine material to be measured in close to real time for autogenous and SAG mill charges. The updated simulation model estimates mass loss with ...

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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

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mill charge and speed. SAG Mill product P80 values are typically in the range of … OPTIMIZING SAG MILL PRODUCT SIZE IN SAG MILL _ BALL MILL GRINDING CIRCUITS

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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 show a typical print-out of mill cylinder and cone charge weight for an …

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rate [t/hr], smdc is the SAG mill discharge size distribution [%retained w/w], MV DC_H2O is the SAG mill discharge water addition rate measured variable 3[m3/hr] and SG l is the process water specific gravity [t/m ]. Step 2: SAG Mill Rock Charge The SAG mill rock charge properties (SMRC) and size distribution (smrc) are estimated by the reverse-

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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 ...

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