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SAG mill control, insight, and reliability. ... Improve grate discharge design to keep pulp level constant all through the mill length Optimize and control the mill media filling degree to reduce production costs while keeping the same grinding performance. Figure 2. Example of
The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long. It is a grate discharge mill with an inside diameter of 10363 mm [34 feet] and a grinding length of 5334 mm [17.5 feet]. The mill is driven by two 8,500 horsepower ABB motors. Figure 2 - The 34' x 20' SAG mill
Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm). Single stage AG/SAG mills have to handle large amounts of slurry as they are generally in closed circuit with classifiers whose circulating loads reach as high as 400-500%.
38′ x 22′ egl grate discharge sag mill, 26,000 hp; id: l01508. 40′ x 25′ fl gearless sag mill, 26,000 kw; id: l01445. raymond side feed 453 bowl mill ...
The SAG mill accepts 3 the primary crushed feed ore and operates in closed circuit with pebble crusher. SAG mill discharge passes through grates and screened by a trommel with the oversize being recycled by conveyor back to the SAG mill. Combined product from the SAG mill (trommel undersize) and the Ball mill discharges into a
Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The performance of the pulp lifters in conjunction with grate design determines the ultimate flow capacity of these mills. Although the function of the pulp lifters is simply to transport the ...
Ball Mill Power - Conversion of the ball mill to a grate discharge unit should allow full motor power (4.1 MW) to be utilised. Further, a coarser product is obtained from a grate discharge mill as a consequence of the lower slurry level present in the mill. Grinding Efficiency and Power Utilisation - The circuit was bottlenecked at the SAG mill ...
Converting a mill from an overflow to a grate discharge arrangement leads to an increased power draw. This happens because the installation of the grate discharge arrangement enables the mill to run with a lower level of slurry due to it being no longer necessary for the slurry to build up inside the mill until it overflows from the mill discharge.
36'Ø x 18.5', 13.5MW SAG Mill and 22'Ø x 34', 8.5MW Ball Mill. Platinum Project. South Africa 20′ Mill Conversion from Overflow to Grate Discharge. Copper Project. Peru 20'Ø x 30', 6.5MW Ball Mill. Gold Project in Algeria and Nickle Mine in South Africa. Algeria & South Africa
SAG mills. All grate discharge mills (ROM, primary mills, etc.) Specifications. Grates are manufactured in CrMo (FMU226 type) for AG and grate discharge mills and in High-Chrome for AG mills. Lifters design adapted to avoid overthrowing of balls. Design to best fit to the existing pulp lifters. Downloads.
where slurry was contained within the grinding charge as in a typical grate discharge AG/SAG mill (Figure 2a) or where it additionally formed a large slurry pool as occurs in all overflow ball mills (Figure 2b)(Morrell, 1993, 1996a). However, from experience gained with single
The slurry discharge is a much stronger flow than that of the balls and exits the mill with peak speeds of up to 1.5 m/s. As shown in Figure 8, sl urry quic kly flows o ff of the ends of the ...
32 x 12 ft (9.8 x 3.6 m) Hardinge Koppers ( ) SAG Mill 6800 HP. Manufacturer: . 32 x 12 ft (9.8 x 3.7 m) Hardinge Koppers SAG Mill 6800 HP (5100 kW) Two GE wound rotor induction motors: - 3400 HP - 710 RPM - 4000 V - Includes motor starter. - Includes lube system and temperature sensors.
Discharge End Liner. SAG MILL. 6 7. ... Grate DE Outer Pulp Lifters Discharge Cones Months. BRADKEN COMPETITOR. The Discharge End (DE) pulp lifter is a critical component of autogenous (AG) and semi-autog-enous (SAG) grinding mills, having a significant impact on …
efficiency of the mill discharge system for slurry and pebble removal, and lining ... • Use of DEM and CFD for optimising the design of mill liners, grates and pulp lifters • Innovative pulp lifter systems ... circuiting of the SAG mill and ball mill additions topping the list.
The 7.3m diameter by 4.57m effective grinding length ("EGL") grate discharge SAG mill is fitted with steel liners and pulp discharges and initially processed 2.5 Mtpa of ore. The SAG mill is equipped with a 4,300 kW wound rotor induction motor and Liquid Resistance Starter ("LRS") and has capability to provide speed variation through a ...
Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The performance of the pulp lifters in...
The SAG mill screen undersize, and the ball mill discharge combine, … In grate discharge type ball mill, a grate is provided at the discharge end of shell. PLANT DESCRIPTION INTI RAYMI S.A. (KORI KOLLO) NEWMONT MINING …
The Grate Discharge Mill permits a quick discharge of the finished material into the classifier which makes the desired mesh size separation and returns …
Different combinations of SAG mill ball charge and grate open area were tested until 2006. A higher load level was achieved after several changes in the grate design that prevented both liner and grate breakage. Upon resolution of issues related to the mill grate design, the project achieved the target throughput of 41 kt/d. Phoenix
Grate discharge mm 63 Discharge % solids wt% 72 SAG mill discharge screening Stage 1 trommel Stage 2 double deck screen Table 2 – Pre-Sampling Data Parameter Unit Design Criteria Sampled Collected from Mine Pit on 31-Oct-2017 TOM Laboratory SG g/cm3 2.66 2.69 Bulk density t/m3 1 ...
SAG mill geometry and operating conditions. To explore three dimensional slurry flow in a SAG mill, including discharge through the grates and flow in the pulp chamber, we use a pilot scale Hardinge 6 ft (D) × 2 ft (L) (1.8 m × 0.6 m) mill. The model contains the complete mill geometry including the feed end, the main/belly/circumferential ...
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 accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill
discharge pump (grate and pulp lifters) is operating. Similar to the impeller design affecting the pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of the SAG/AG grinding mills. The general arrangement of AG/SAG mills discharge system is shown in …
effect of grate discharge area of sag mill grinding. Operation of SAG Mills Principle Operation of Semi Once the slurry has made its way via the grinding media charge, its first stage of discharge is via the grate Hence, in the absence of any subsequent restriction, the maximum flow capacity that can be obtained for a given mill is determined by the grate.
down menu. The mill diameter input relates to the inside-shell dimension. The model actually requires the inside liner diameter and hence the liner thickness must also be input. The required length to be input depends on whether the mill is an overflow or a grate discharge machine. …
The discharge rate depends on how efficiently the discharge pump (grate and pulp lifters) operates. Similar to the impeller design affecting pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of AG and SAG grinding mills.
of grate/pulp lifter design in AG/SAG mill discharge. The current understanding from literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions. It also indicates that in
The material is reclaimed via one of three vibrating feeders which deliver ore to the primary mill. The installed primary mill is an Outotec 7.30m x 3.35m effective grinding length (EGL) grate discharge SAG mill with 3.4MW installed power. The mill is also installed with Turbo Pulp Lifters (TPL) in lieu of standard radial pulp lifters.
SAG mill: The SAG mill adopts a self-return device to realize the discharge of the mill. Ball mill: There are many types of ball mills, mainly including overflow ball mills and grate ball mills. Rod mill: The rod mill does not use grid plates to discharge ore.
Ball Mill, Grate Discharge, Toll Processing
