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.
Aug 13, 2015How a Grate Discharge Ball Mill Works Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG) How it works is, the slurry flows across the grate as it would a screen panel On the other side of the grate/screens are veins like a pump impeller As the mill turns/rotates the slurry is "pumped" out and discharged
The grate discharge arrangement removes this slurry pooling effect almost completely. Estimates of the increases in power draw possible with grate discharge ball mills range from 10% to 20%, according to mill size and other operating parameters. The figures from pilot tests and some operating sites are even higher, up to 25% more power draw.
SAG Mill Liners for Discharge Grate Special Features: The material of SAG mill liner castings are low C or high C Cr-Mo Alloy steel,which depends on the specific working condition of the SAG mill. The hardness of AS2074 L2B is HB310-HB380. We can make big size SAG mill liner castings with Sodium Silicate Sand Process & Resin Sand Process.
Discharge arrangement Outotec provides a wide variety of discharge arrangements, such as overflow, peripheral, grate and open-ended. SAG and AG mills typically have grate discharge arrangements which can be either with or without trommel screens.
Outotec books order for SAG and ball mills at Mexico zinc . 2020. 12. 17.· Outotec books order for SAG and ball mills at Mexico zinc operation. ... Converting a ball mill from overflow to grate discharge . Grinding mills, including SAG (semi-autogenous grinding) mills and ball mills, consume approximately 60-70% of the total energy cost of the ...
THE MDX SERIES OFFERS A WIDE RANGE OF OPTIONS Whatever needs you may have for mill duty pumping, the MDX pump offers a suitable solution. From the MDX 150 all the way to the MDX 750, the pumps offer flow rates up to 14,000 m3/h. The pumps are a perfect fit for SAG, ball and rod mill discharge as well as cyclone and screen feed applications.
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
Mining News Pro - The company`s new Open-Ended Discharge Grinding Mill (OED Mill) discharges material directly through the grates instead of using pulp lifters. Zoom: This solves the throughput bottleneck problem associated with …
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
Outotec's delivery includes two ball mills and one SAG mill, all of which are based on Outotec's proprietary grinding mill technology. The largest of the …
How a Grate Discharge Ball Mill Works. Aug 13, 2015· How a Grate Discharge Ball Mill Works. Here I try to explain how ground slurry is discharged from a grate ball mill (or SAG). How it works is, the slurry flows across the grate as it would a screen panel. On the other side of the grate/screens are …
The mill, 6.7 m diameter and 8.2 m long with steel liners will be built with grate discharge using Outokumpu Technology's patented Turbo Pulp Lifter (TPL) technology. It will be capable of processing 1,100 t/h of milled ore to the flotation section. It will be powered by two synchronous motors continuously drawing approximately 8 MW.
Optimization of the single stage SAG mill circuit at the ... - zenith. implemented which allowed the SAG mill to operate similarly to a large ball mill .... the second CIC plant is used in the mill for process and CCD wash water as the ... media size plus interaction with discharge grates and classification efficiency.
The Santa Rita grinding circuit consists of one 30'x 15.4' 8.5MW SAG Mill fitted with Outotec patented Turbo Pulp Lifters (TPLTM) in close circuit with HP400 short head pebble crusher and one 20' x 28.4' 5.5MW Ball Mill in closed circuit with cyclone cluster fitted with 10 x 26" cyclones. STARTUP AND COMMISSIONING
With grate discharge mills – typically SAG, AG and ball mills – the conventional relining process at the discharge end usually involves removing the dischargers and grates, replacing with new lined versions and hammering in large, long bolts through the layers to …
With ore grades declining and cost pressures rising, high-throughput circuits based on very large grinding mills are becoming an increasingly attractive option in mineral concentration applications. The new Outotec® Open Ended …
A vibrating screen was used to provide a mill discharge product separation at 19 mm (¾ in.). The minus 76 trail (-3 in.) plus 19 mm (+¾ in.) screen oversize product, which are the "pebbles", were then crushed to essentially minus 19 mm (-¾ in.) in a crushing circuit. This product was returned to the feed end of the mill.
We developed lifter, grate, pulp lifter and flow cavity through exit trommel model for the 40 ft Cadia mill in Australia. The study identified all wear zones, granular flow back into the mill and re-circulating flow inside the pan cavity for straight and curved lifters. At the time, we also modelled the water flow regime through the grate.
Grate discharge Diameter 38′ Length 25'5″ flange-to-flange EGL 22′ Components / Inclusions Feed chutes Discharge grates Steel pulp lifters SAG mill trommel Mill braking system Hydraulic jacking system Portable hydraulic power unit. Motor and Drive 26,000 HP (19.4 MW) Siemens wrap-around drive motor
The SAG mill accepts 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
Discharge systems, including pulp lifters and discharge cones are arguably the most difficult and time-consuming assemblies of any grate discharge mill to replace. Solution: Light-weight components crafted from steel-reinforced rubber are easily installed, and provide long service life. By reducing system mass, it is often possible to increase mill
The cost of a ball mill conversion from overflow to grate discharge is 'fairly' affordable at $65,000 for a 13′ x 15′ mill. This is only for the discharge head, grates and pulp filters (rubber). A comparison in laboratory of Overflow Discharge Ball …
Grate discharge heads for ball mills are completely assembled in the shop, with grates, clamp bars, pan liners, and center discharge liners in place. Depending upon available handling facilities, the head or shell can be lined separately in a repair bay, or after assembly of the mill proper in the trunnion bearings.
Outotec mill discharge pumps have been designed for mill circuit applications, such as SAG/ball mill discharge pumps and hydrocyclone feed. Special emphasis has been placed on components that have to withstand exceptional wear from coarse heavy solids and flow turbulence, the company says.
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 third generation of discharge grates introduced a further increase in Pebble Extraction the open area as well as combination of 3 and 3.5 inch slotted apertures, together with the four pebble ports designed for second One of the main characteristics of the SAG mill operation in late 2004 generation plates.
Outotec launched a grinding mill with an open-ended discharge, the OED Mill. This large high-capacity grinding mills offer reductions in both CAPEX and OPEX. Instead of using pulp lifters, the OED Mill discharges material directly through the grates. It uses a novel grate-supporting spider to maximize slurry transport and minimize slurry ...
A pulp lifter for a grate discharge mill used primarily in mining operations. The lifter comprises a plurality of chambers which radiate outwards. Each chamber comprises a transitional compartment (2) having apertures (19) into which the slurry enters and a collection compartment (21) to which the slurry passes. When the pulp lifter rotates, the slurry cannot flow back but …
Polycorp is a global supplier of Rubber and Rubber Steel Mill Liners and Discharge Systems for AG/SAG Mills, Rod Mills, Ball Mills, Scrubbers and Mixing Drums. Polycorp has supplied the mining industry with Mill Liner Systems since 1968, with over 300 Mill Liners installed in many countries worldwide.
Mill drive arrangement. Mill drives are generally located on the outside of the mill to facilitate maintenance. • Mill discharge arrangement. If the SAG and ball mills feed separate pump systems this is not an issue. If the two stages feed the same pump system, the SAG mill usually drives the discharge arrangement.
The company's new Open-Ended Discharge Grinding Mill (OED Mill) discharges material directly through the grates instead of using pulp lifters. This solves the throughput bottleneck problem associated with comminution …
1-250-373-2427 6451 Trans-Canada Hwy Savona, BC V0K 2J0
A 4.7m x 7.5m Outotec grate discharge ball mill with an installed power of 2.6MW and Turbo Pulp Lifters is operated in closed circuit with 250mm cyclones to provide a 45 m product to flotation. The primary mill was initially commissioned as an Autogenous Grinding (AG) mill.
The Outotec slurry wheel upgrade is a retrofit sealing solution for the grinding mill feed end. The existing configuration is replaced with a new and improved slurry return system featuring a unique water-wheel design that significantly improves the material containment of the feed ends.
