2C SS SAG Secondary crushing followed by a single stage SAG mill amp recycle crusher. 2C SABC Secondary crushing followed by an SABC circuit APC Primary crushing followed by an AG mill with recycle crusher and a Pebble mill Rod Mill Secondary Crushing followed by a open or closed circuit Rod mill
In 2017, a secondary crushing circuit was installed to remove the SAG mill throughput bottleneck and increase production of highly competent underground ore from 1.35 to a minimum of 1.7 Mta.This paper discusses the findings from the trial phase, the circuit design, project delivery, site optimisation, and the plant performance.CITATIONMatson ...
Secondary crushing circuit 4 MP1000 crushers, typically using about 60 of power draw Tertiary crushing circuit 4 2.4 m by 1.65 m HPGR, each with two 2.8 MW drives Fine screen aperture 10 mm Ball mill 26 ft diam by 44 ft long with twin-pinion 8 MW drives Plant survey conducted April 2010.
mill work index 11.4 kWht and an average RQD of 44. RQD values of 25 resulted in a SAG mill feed size F80 between 55 and 60 mm and throughputs of 6200 th. RQD values of 55 resulted in SAG mill feed size F80 of over 70 mm and a SAG mill throughput of 5200 th. The Batu Hijau SAG mill specific energy was a function of point load test and ...
Feb 20, 2019 Crushing machinery, particularly the SAG mill is massive, and much of the expense of running the mill comes from powering the movement of this giant mass of steel. Running it half empty, or at any suboptimal level is a huge waste of energy.
However, an additional secondary crusher and conveyer system were required to facilitate the HPGR circuit. The HPGR also produced a coarser product than the SAG mill. Thus, the energy needed for crushing, ball milling and material handling was higher for the HPGR option than the SABC circuit.
May 01, 2009 In AGSAG-based circuits the need for W s appears to be unnecessary as Fig. 2 illustrates. Primary crusher feeds often have the shape shown in Fig. 2 and this has a very similar gradient to typical ball mill cyclone overflows. A similar situation appears to apply with HPGR product size distributions, as illustrated in Fig. 3.Interestingly the authors data show that for HPGRs, closed
Feb 26, 2014 APPLICATION Primary Crusher Purpose To reduce the ore to a size amenable to secondary crushing, SAG mill feed or heap leach product Usually operated in open circuit. Typical crushers used are Jaw Gyratory Horizontal impactors Rotary breakers Ratio of reduction 81 Some form of scalping screen may be ...
Dec 04, 2018 In cases where there are a lot of clays present or there is high moisture, an AG or SAG mill may be appropriate. For smaller throughput scenarios, a three-stage crushing plus rod mill plus Vertimill may make the most sense. It all depends on the ore characteristics and the
80 R.R The sieve size can be passed 80 wt of particles after crushing Reduction Ratio of Jaw Crusher is around 46, but generally using 4. 100cm size ore10cm using Jaw Crusher to crushing. 100 25cm 4. 25 6. 25cm 4 Meets the requirements Gyratory Crusher. Reduction Ratio 4 Cone Crusher The cone crusher is a modified gyratory crusher. The ...
5. Bigger Unloading times depending on the crusher and mill conditions rate and availability 6. Restriction on the hour of the last lap trains cant enter the mine one our before the ends of the shift 7. Etc Primary Crusher Stock Pile SAG 1 Stock Pile SAG 2 Secondary Crasher 15
The SAG mill will discharge to the pebble dewatering screen and oversize material will discharge onto a series of recycle conveyors. Tramp metal will be removed from the pebble stream by a magnet. The pebbles will be crushed by the pebble crusher and will discharge onto the SAG mill feed conveyor and be fed back to the SAG mill.
Ore is transported by conveyor and stockpiled. Stockpiled ore is taken to the mill where it is broken down further using a two-stage wet grinding circuit that includes a primary semi autogenous grinding SAG mill and secondary ball mill, cyclone cluster and a pebble crusher to
Metsos AGSAG 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 the maximum size that can be practically conveyed and introduced into the large mill feed chutes.
The temporary crusher was successful at increasing the throughput by 7 and based on the operating data, plans are currently being developed to install a permanent secondary crushing system in front of the SAG mill. This paper will review the results from the test crusher and the flow sheet for the permanent secondary crusher.
SAG Mill Circuit Example Gold Processing SAG mill circuit example for gold processing image 135-6-3 AGSAG Mill. AGSAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AGSAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill
Mar 12, 2013 Secondary Crusher Machines are advantaged in mining industry for Secondary Crushing Plant. ... Summary Ausencos experts discuss the viability of secondary crushing in SAG mill circuits and provide advice for mines considering such a set-up. Secondary crusher secondary impact crusher or cone crusher ...
After closed-circuit secondary crushing, the SAG mill feed 80 passing F80 size was 25 mm to 30 mm. Installed grinding power is split equally between the two mills with the SAG mill fitted with a variable speed drive VSD. SAG discharge screen oversize pebbles or scats was recycled through an 185 kW pebble crusher.
the SAG and ball mill. Diverting primary crushed ore to a surge bin ahead of a secondary crusher, and allowing the bin to overflow into a by-pass achieved this. INTRODUCTION In Australia, there are several examples of the retrofitting of secondary crushing circuits to reduce
Key to the whole setup was a need to convey material 500-feet from the secondary crusher to a stacker which feeds the pebble bin, ultimately providing fresh feed for the SAG mill. This project had very strict time constraints, and our biggest concern was the potential of slowing the process by four weeks or more with the erection of a ...
Dec 06, 2017 Secondary crushing, screening, fine ore storage and rod mills were replaced with a SAG mill and recycle crusher the rod mills were re-purposed as ball mills.
Primary and secondary crusher Products. As a leading global manufacturer of crushing, grinding and mining equipments, we offer advanced, reasonable solutions for any size-reduction requirements including, Primary and secondary crusher, quarry, aggregate, and different kinds of minerals.
Oct 12, 2017 1. SAG mill is the primary tool for grinding. SAG mill is used before the other mills. Ball mill is a secondary, and it is used after the SAG mill. 2. SAG mill breaks the raw material into pieces for the further grinding. Ball mill is used to grind the pieces of raw material into. powder-like structures. 3.
Jul 08, 2016 The throughput capacity and efficiency of a SAG mill are affected by the significant recirculated load derived from over-size discharge product critical size pebble discharge that is screened out and may be stockpiled or requires secondary crushing prior to re-introduction to the SAG mill
Northparkes installed and commissioned a secondary crushing circuit in 2010 to debottleneck the semi-autogenous grinding SAG mill constrained grinding circuits. Following further improvements to the circuit inclusion of a double deck vibrating screen, the project successfully delivered finer feed to the SAG mill.
Aug 28, 2018 The application of secondary crushing at the Jundee gold mine ... SAG mill Optimisation and increasing throughput at the Phu Kham Copper-Gold Operation a success story Watch . Optimising the operation of paste thickening at the Yara Siilinj rvi Plant Watch .
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
Dec 16, 2015 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
SAG milling extends itself to many applications due to the range of mill sizes available. They can accomplish the same size reduction work as two or three stages of crushing and screening, a rod mill and some or all of the work done by a ball mill. SAG mills are also an optimum solution for wet grinding since crushing and screening in these ...
The initial partial secondary crushing process route was adopted to minimise critical size material in the SAG mill feed. However the initial partial secondary crushing circuit did not operate effectively as a result of blinding of the vibrating grizzly and the secondary crushers were
Crushed pebbles will return to the SAG mills via the stockpile feed conveyors. The pebble crushing plant is located adjacent to the secondary crushers. A parallel pebble handling circuit provides for standby and direct return of pebbles to stockpile, so as to support crusher and bin maintenance.
the SAG mill amounting to 51.2 th affecting mill capacity as this took space and limited the capacity for new feed. Using ModSim simulator, incorporation of a 100 micron screen on the cyclone underflow stream was simulated. The main purpose of the screen is to reduce the re circulating load
coarse ore hardness parameter which is used in primary and secondary crushing situations. It is defined by equation 8 with K. s. set to 55. K. 2 1.0 for all crushers operating in closed circuit with a classifying screen. If the crusher is in open circuit, eg pebble crusher in a AGSAG circuit, K. 2. takes the value of 1.19. x. 1 P. 80
Mobile crushing fleet including jaw crusher, cone crusher, vibrating screen and 2 x stacker conveyors. 70t and 20t cranes. Grinding plant equipment SAG with 2,000kW installed power, SAG mill size 6.71m x 2.59m, rubber-steel composite liners, Ball mill with 3,720kW installed power, ball mill size 5.03m x 8.21m, composite.
Crushing Secondary Crushing Stockpiles Ore Concentration Classification Water Tailings Pond Flotation Separation Conditioning Grinding Water SAGBall Mill Primary Crushing Ore Storage Leaching Leached Solution Dryers Electro-Winning Solvent Extraction Electrolyte Filtration Concentrate to Smelting and Refining Markets Agglomeration Curing Pump