At the end of 2010, the SAG mill ball size was changed to 10mm but pro5 ved to be unsuccessful, ... 50 mm. A blend of 125/105 mm media was used from December 2010 until March 2011 when the 125 mm media was fully restored as the make-up ball size. With the coarser mill feed, the 105 mm ball size was ...
The simulator predicts higher SAG throughputs with the 125 mm ball compared to the 150 mm ball. The 125 mm ball can provide the necessary energy level to break the rocks. Since the number of 125 mm balls for a given volume is greater than for 150 mm balls, the number of breakage events is more for the 125 mm ball (other mill variables being equal).
conveyed to the SAG mill feed chute. The SAG mill, driven by a 12 MW wraparound gearless motor, normally operates in open circuit. Ball charge is made up to 15 per cent by 105 and 125 mm steel balls. The mill liners are steel, normally with a high-low configuration. There is no provision for pebble crushing or bypass, with scats …
Compare and contrast different type of equipment and their components used for grinding. Identify key variables for process control. Design features of grinding equipment (SAG, BALL and ROD MILLS) Explain typical …
However, none of these models consider the size distribution of the material in the feeding as a design variable. Many mine-to-mill (M2M) works [59][60][61] have shown the influence of ROM (in ...
In Grinding, selecting (calculate) the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do. Often, the ball used in ball mills is oversize "just in case". Well, this safety factor ... title="Calculate …
Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW. Our team of product engineers continually improves SAG/AG Mill designs in order to provide the most …
SAG Mill Grinding MediaKemcore SAG steel forged balls are manufactured grinding balls in nominal sizes from 90 mm to 140mm. With average wear rates of 0.6kg/ton, they're among the best in the industry. ... Ball Mill Mining Grade - Steel Forged Grinding Balls. From $925 View. Cr ≥17% Cast Chrome Grinding Balls. Regular price $1,130 ...
SAG Balls. Molycop's SAG milling product range is specifically designed for today's high-impact SAG milling environments. Our innovative manufacturing process results in SAG balls with high impact resistance …
The mill operates in a closed circuit with screens that size the ore and send it back to the mill for further grinding. The product from the mill is then sent to a cyclone for separation of the desired material. ... The grinding media in a SAG mill are larger than in a ball mill, and there are fewer of them per ton of ore. The larger grinding ...
The size of the SAG mill grinding media. As the new installed SAG mill, the first load of gridning media is like as 80mm, 100mm and 125mm, according to the feeding size and discharged size and capacity, the …
4 10 100 10 100 1000 10000 size (microns) % passing closed circuit SAG cyc o/f closed circuit Ball cyc o/f Figure 2 – Example of a Closed Circuit SAG Mill Cyclone Overflow and a Ball Mill ...
The SAG Mill has a "small" circulation load of oversize given be the 3/8″ trommel screen and the 1/2″ x 1 1/4″ discharge grates. The load of 4″ balls in this SAG is …
(EGL) SAG mill driven by a 24,000 kW gearless drive. The SAG mill feeds two FL ball mills each 26 ft. in diameter × 40 ft. long (EGL), each driven by a 16,400 kW drive. The SAG mill is one of the largest volumetric capacity SAG mills in the world and represented the first 40 ft. SAG mill in Peru (Garcia & Villanueva, 2013 [1]).
The Std. JK size distribution is that taken from ball size distributions measured from dumping and sizing the whole charge of production SAG mills, Morrell (1993). The mill with scats had a considerably finer size distribution, and notably lacks ball in the 40mm to 60mm size range. This is the size at which the porosity is exposed, and they
To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered. Each of these topics has had a considerable amount …
The SAG grinding ball size is usually about 125mm. But more and more mining company adopt bigger size, like 135~150mm. Adopting the bigger size ball, the energy consumption of SAG mill will be lower, and the …
If you have done proper test work and assumed your Work index is as you provided above quickly I can estimate that your SAG throughput is around 517 t/h and if the total % of mill charge is 25 % of the total mill volume, then you can assume the following assumption .i.e. mass proportion of grinding body to ore be 15% steel balls and 10 % ore (1 ...
Size: SAG milling grinding media are available in sizes from 4.0" to 6.5" or 105mm to 160mm. Chemistry: The chemistry of the SAG balls is controlled via a robust internal quality system with our bar suppliers to optimise physical properties. Hardness: Hardness of the SAG balls is altered using carefully selected heat treatment variables specifically …
125mm Steel Ball For SAG Ball Mill, promise you high and even volume hardness, strong impact toughness and breaking rate less than 0.3% during bulk use. Surface hardness: 58-60HRC, Impact toughness: ≥24 J/CM2 …
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%. [6] [7] The largest SAG mill is 42′ (12.8m) in diameter, powered by a 28 MW (38,000 HP) motor. [8] A SAG mill with a 44 ...
will become the predictions. In the case of SAB/SABC circuits the transfer size is the product of the SAG mill circuit and the feed of the ball mill circuit. Hence if power-based equations such as eq. 1 and eq. 2 are to be used to predict the SAG mill circuit and ball mill circuit specific energies it is important to ascertain:
And the product of the large AG/SAG grinding is either a finished size ready of processing, or an immediate size for further grinding in a ball mill, pebble mill, VERTIMILL® or a stirred media detritor (SMD). Grinding circuit design AG/SAG mills are normally used to grind run-offmine ore or primary crusher product. Feed size to the mill is ...
SAG mill liner development draws primarily on practical experience from SAG milling operations supported by computer-based modeling of charge motion in SAG mills and on established good design practice. Liner design needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., …
RoM Ball mills – a comparison with AG/SAG Milling Aubrey N. Mainza1 and Malcolm S. Powell 1 ... Ball size, mm - - 80 80 Mill power, MW 5.15 4.88 9.91 9.94 Specific energy, kWh/t 7.63 7.15 13.9 ...
The above is intended as a guide only. Individual ball hardness readings may fall outside the range listed above. Nominal Ball Diameter in (inch) & Mass in (g) Nominal Ball Diameter in (mm) & Mass in (g) Ball Diameter (in) Minimum Mass (g) Maximum Mass (g) Ball Diameter (mm) Minimum Mass (g) Maximum Mass (g) 3.5 2869 3156 94 3392 3731
Efficient Size Reduction: Ball mills provide efficient and uniform size reduction of materials, ensuring consistent product quality. Scalability: Ball mills can be scaled up or down to accommodate production requirements, making them suitable for both small-scale and large-scale operations.
Technical Datas Application: 125mm Steel Ball For SAG Ball Mill for Iron ore mine, Gold Mine, Copper Mine, Silver Mine, ... Steel Ball for SAG ball mill Quality Parameter. Ball Size/Steel rod type. Surface Hardness. …
SAG mills and AG mills have different definitions and operate differently. SAG mills use a combination of steel balls and rock particles as grinding media, while AG mills use only the ore itself. Both types of mills are used for grinding ore in mineral processing operations, but SAG mills are larger in size and can grind larger quantities of ore.
As you know these kinds of steel balls are resistant to impact but at a certain radius (worn balls) the spherical shape of balls will be change to irregular shapes which can affect grinding efficiency badly. So the ball size distribution inside SAG mill will be incomplete. For compensating this issue, extra ball size can be added with top size.
It's difficult to generalize on SAG mill ball size selection as it depends on a number of factors: Ore properties Level of impact breakage in the mill (speed, lifter design, ball load)
sag mill ball size 125mm 2 - annasweethome.de. sag mill ball size 125mm 2. With high aspect ratio SAG mills total charge to ball charge ratio should be greater than 2 up to 25 for a coarse mill feed say F80 110 mm If the mill feed size is fine say 50 mm or 30 mm then you are looking at a total charge to ball charge ratio of about 1516.
