The SAG mill feed conveyor transfers the crushed ore into the SAG mill for grinding. The SAG mill reduces the ore size to the consistency of coarse gravel, using a wet-grinding process. Discharge from the SAG mill is significantly wet and has the consistency of slurry. The slurry is discharged through a screen to remove any oversized material.
In this presentation an historical perspective of the origins of Mine-to-Mill is described and is followed by a discussion of how AG/SAG feed size affects throughput and specific energy and the factors that in turn influence AG/SAG feed size, such as ore hardness, Run of Mine (RoM) size distribution and crusher operation (both primary and secondary).
The reported power draws of these MP 1000 crushers were 460554583581 for a total of 2178 kW at the DCS. Use a conversion 0.96 for DCS to shell power gives 2090 kW. The secondary crushers are reported to process a 160 mm primary crushed feed into a 38 mm secondary crushed product. Back-calculating the operating work index of the crusher gives
Produce feed to semi-autogenous (SAG) mill or secondary crushers Examples-Jaw crushers feed size up to 1.5 m product size 200 - 300 mm inst. power up to 400 kW capacity up to 1200 t/h Jaw crusher Q BSs(cot a)k(60n) Q volumetric capacity (m3/h) B inner width of crusher
feed to p sag mill Four in-pit semi-mobile primary crushers feed two overland conveyors to the secondary crushers and main processing complex. The three 28 megawatt SAG mills and four 16.5 megawatt ball mills installed at Cobre Panama are the largest installed anywhere in the world, except for Sentinel
respect with SAG mills being increasingly less sensitive as the ball charge is increased (Morrel S and Valery W, 2001). 2.2. EFFECT OF FEED SIZE DISTRIBUTION ON SAG MILLING The qualitative eect of changes in particle size distributions (PSD) on the SAG mill performance can be addressed by using the grind curves.
In 2017, First Quantum approached Schenck Process regarding the supply of mill discharge screens for Cobre Panamas SAG mills, which are among the biggest in the world. The resulting design was a monster mill discharge screen, that was later dubbed the Beast. ... The intention is to minimise fines in the feed to the secondary crushers ...
Nov 26, 2019 The biggest characteristic of the sag mill is that the crushing ratio is large. The particle size of the materials to be ground is 300 400mm, sometimes even larger, and the minimum particle size of the materials to be discharged can reach 0.1 mm. The calculation shows that the crushing ratio can reach 3000 4000, while the ball mills ...
Single stage SAG Mills are very beneficial in reducing CAPEX for plants with a staged throughput approach. When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
primary crushing plant with a 1.525 m x 2.794 m gyratory crusher secondary pre-crushing plant with two cone crushers, each powered by one 1,000 kW motor prior to the grinding circuit SAG/ball mill/crusher grinding circuit one 12.20 m diameter x 6.71 m EGL SAG mill
Secondary crusher feed control schematic. 8 Feeder speed Feed rate set point Weight set point PSD, mineral type, or ore hardness Feeder Belt SAG mill Feed rate Weight BrainWave BrainWave Rotation Recyle rates BrainWave SAG mill Stabilize and improve your SAG mill operations. BrainWave
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
Oversize material from the SAG mill trommel screen reports to a pebble crusher for size reduction. The HP100 pebble crusher is driven by a 90kW motor. The crusher typically operates with a closed side setting of 14mm. The crushed product from the pebble crusher is fed back into the SAG mill feed.
installation of secondary crusher were evaluated. June 2011, a secondary crusher XL 900 (671 KW) was commissioned in order to reduce the SAG feed ore size from 0 -4.5 inches to 0 -1.5 inches. The installation of the secondary crusher between the gyratory and the primary grinding allowed to increase the SAG
Jun 06, 2016 SAG mill by feeding crushed pebbles The standard destination for crushed pebbles has been to return them to SAG feed. However, open circuiting the SAG mill by feeding crushed pebbles directly to a ball-mill circuit is often considered as a technique to increase SAG throughput.
Dec 23, 2017 The addition of secondary crushing to an existing circuit are that Reducing the F80 80 of the feed size to the SAG mill by 10mm will result in a 3-6 increase in SAG mill throughput, with the magnitude depending on the ore characteristics and the mill operating conditions Source Ausenco
USA have used the secondary crushing of an interm ediate feed size fraction before a SAG mill. Due to screening difficulties Asarco Ray went back to full secondary crushing.
The purpose of the primary crusher is to reduce the ROM ore to a size amenable for feeding the secondary crusher or the SAG mill grinding circuit. The ratio of reduction through a primary crusher can be up to about 81. Feed ROM up to 1.5 m. Product -300mm (for transport) to -200mm (for SAG mill) Feed Rate
gyratory crusher. Ore is then transferred to secondary crushers after scalping of the -50mm material. The secondary crushers are Allis Chalmers 13184 Hydrocones, producing a product with an F80 between 40 and 75mm. This product is stockpiled as SAG mill feed. The SAG mill
Dec 17, 2020 In addition to the advantages of surge bins, the use of a stockpile of sufficient capacity can allow the benefit of not having to recycle pebbles back to SAG feed during periods of crusher maintenance, and can allow mill throughput to be maintained at high levels even if the pebble-crushing circuit capacity cannot keep up.
When future tonnage is to be increased, the SAG Mill can feed downstream ball milling to boost capacity. Fuller-Traylor SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.
This necessitated increasing the power available to the SAG mill and reconfiguring the ball mill to a grate-discharge unit to draw full motor power. Manipulation of the proportion of secondary crushed feed allowed balancing of the duty between the SAG and ball mill. Diverting primary crushed ore to a surge bin ahead of a secondary crusher,
followed by a ball mill and a pebble crusher to crush the SAG mill trommel oversize material. Primary crushed ore is reclaimed from the stockpile via two apron feeders which can operate individually or in parallel to provide the 385 t/h. The mill feed is conveyed to the primary grinding mill feed chute, where it
SAG 2 0 0 6 Secondary Cyclones Primary Cyclones AG mill Pebble crusher Feed Vertimill Figure 1. Two stage AVC grinding circuit flowsheet After an initial expansion study conducted in 2002, Cannington commissioned a portable pebble crusher and started experimenting with the introduction of pebble ports in the AG mill. The number of grates
while the oversize material is fed into a secondary crusher. The crushed ore from the secondary stockpile is tipped onto the SAG mill feed stockpile before being fed to the SAG, Ball, Crushing (SABC) circuit. Ore is drawn from underneath the SAG mill feed stockpile onto the SAG mill feed conveyor belt by
AusIMM Tenth Mill Operators Conference, Adelaide 2009, p.357 -364. Primary Crusher Cyclones Stockpile Screen Primary Mill Secondary Mill Pebble Crushers Secondary Crushers Overflow Screen-25mm. coarse 25mm. fine. Pebbles
The XL2000 cone crusher is intended for secondary or tertiary applications and does not replace the need for a primary gyratory or jaw crusher. However, the XL2000 can replace a SAG mill, according to the company, thereby reducing overall costs while still maintaining circuit capacity and producing a product crushed to specific requirements.
Jan 01, 2016 The feed to high aspect AG/SAG mills are usually preferred from gyratory crushers, while the feed to low aspect mills are preferred from jaw crushers. Depending on the set, the maximum size of the particles discharged from gyratory crushers is about 300 mm and from jaw crushers is about 180100 mm thus, the optimum feed size may be taken to ...
in the primary mill. The aim was to reduce a portion of the feed material below critical size and generate more fines to decrease the load in the primary mill. Not all of the feed material was pre-crushed to allow for sufficient abrasion breakage in the primary mill. The SAG mill was converted to an AG mill and the ball mill was converted to
The Inferential measurement models of the SAG mill inventories, feed rate and sizing and mill discharge rate and sizing requires are determined in the following six-step sequence 1. Oversize crusher feed, primary cyclone feed, SAG mill discharge, including the transfer sizes ( T 80. . . T 20) 2. SAG mill rock charge
the secondary mill pebble feed bin. When this bin is full, the pebbles will be routed to the pebble crushers via an overflow chute on the pebble bin. The trommel underflow passes over a double deck vibrating screen with a 16mm top deck and a 4mm bottom deck. The oversize from both decks is combined and reports to the pebble crusher feed bins ...
Autogenous and Semi-Autogenous Mills The optimum solution for wet grinding Higher quality at a lower cost Open the catalog to page 1 Metsos AG/SAG mills accomplish the same size reduction work as 2 or 3 stages of crushing and screening The feed size for these mills is limited to
Jun 02, 2017 Industrial crushers reduce large rocks, ore or waste materials to smaller sizes by impact or pressure to fracture or deform the material. During the primary crushing operation, boulder size feeds from 20 to 100 in. are reduced to secondary crusher sizes of 1 to 20 in. or mill feed size of .5 to 3 in.
Ball mill Wi test feed size, F 80, m Ball mill Wi grams per revolution at test conclusion, gpr Required parameters. F 80, m is the 80% passing size of the fresh feed to the circuit, ie, primary crusher product (expected to be a Bond-compatible size distribution). Pc 80, m is the 80% passing size of the secondary crusher product ...
The SAG Mill is a block added by the EnderIO mod. A machine similar to a Pulverizer or a Macerator.It is used to process resources to produce dust. It accepts energy in the form of Redstone Flux or Minecraft Joule, with an internal buffer of 100,000 RF and consumption of 20 RF per tick.The energy storage capacity and processing speed can be increased by adding one of 3 tier of Capacitor into ...