Dec 01, 2002· the SAG mill discharge screen aperture size should be monitored and measured regularly to ensure the corrected fifty percent passing size, SMD50c, may be adjusted as required. • the specific gravity of the process water, SG l, should be checked periodically. 7.2. SAG mill fresh feed

The existing SAG Mill Discharge screen had a single deck design of 3.6m x 8.5m and handled less than 1,900 TPH when screening at 13mm. This quickly became the process limitation. In an attempt to assist the movement of material off the deck and reduce the frequency of overloads, the customer decided to incline the screen and upgrade the drive.

Dec 15, 2015· SAG mill discharge Applicable industries: Minerals processing of all metallic and non-metallic ores (e.g. copper, gold, iron ore, silver, lead, nickel, zinc, molybdenum, and more) Features Linear motion, horizontal screen Abrasion resistant wear protection Compact horizontal height Heavily reinforced rugged construction

A milling circuit employs SABC, SAG mill product is wet screened; - Screen undersize goes into a mil discharge sump and is pumped to cyclones. Cyclone overflow is fed to flotation while cyclone underflow is fed by gravity to the ball Mill for further grinding.

Jul 01, 2017· Trommel screens are often included as a classification stage at the discharge end of AG, SAG and ball mills to ensure correct sizing of product from the mill and to separate out oversize material and ball scats from the undersize product/slurry stream that passes through the screen apertures for further processing downstream.

SAG Mill Scalping Screen Ball Mill Rougher Rougher Scavengers Cleaners Recleaners Final concentrate Jenni Sweet Final tail Cyclone cluster Trash ... sliding screen (at a conveyor discharge point) to remove a defined top size and direct it to a primary jaw crusher. The

SAG mill discharge screen undersize is pumped along with ball mill discharge to a bank of twelve 20 in. diameter cyclones. The underflow from the cyclopak returns to a 16.5 ft diameter by 30.5 ft long ball mill.

Discharge. Chute. Date. October 2019. Our KMS team have been working around the clock to hit the delivery date to fabricate this 6t discharge chute for a sag mill @ Northparkes Mines, we still have rubber lining and a three coat painting system to go before completion. The QA process has been completed by our engineer to make sure everything ...

Oct 01, 2009· The SAG mill rock charge properties (SMRC) and size distribution (smrc) are estimated by the reverse-application of the SAG mill grate discharge function on the SAG mill discharge stream estimate, incorporating a size distribution assumption. 3.1.2.1. SolidsThe mill rock charge mass by size, SMRC i, is calculated using Eq. .

The ball mill discharge will be screened and the pulp will be combined with the screen undersize from the SAG mill discharge and recirculated as feed to the hydro-cyclones. It will undergo sequential flotation activity in four independent circuits followed by thickening and filtration to produce copper, zinc, and lead concentrates.

Jun 17, 2021· In 2017, First Quantum approached Schenck Process regarding the supply of mill discharge screens for Cobre Panama's SAG mills, which are among the biggest in the world.

Nov 26, 2019· Based on the high throughput and coarse grind, AG mills produce coarse grinds often classify mill discharge with screens and trommel. SAG mills grinding media includes some large and hard rocks, filled rate of 9% – 20%. SAG mill grind ores through impact, attrition, abrasion forces.

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 …

2.1 SAG mill modeling In MODSIM, one of the simulation models used for a SAG mill unit is SAGT (Semi-Autogenous Grinding with Trommel) model. In this model, a SAG mill with a trommel screen at mill discharge is modeled using the full population balance …

Trommel screen s are often included as a classifica tion stage at the discharge end of AG, SAG and ball mills to ensure correct sizing of prod uct from the mill and t o separate out oversize ...

mill feed. The cyclone overflow gravitated to the first leach tank via a trash screen. Ball mill discharge combined with SAG mill discharge to form the feed to the screen (See Figure 1). Screen oversize pebbles were conveyed to a recycle crusher, where they were crushed and returned to the SAG mill …

Jul 29, 2010· Hatch has awarded Joest an order to build a 3 m x 6 m double-deck SAG mill discharge screen for the Thompson Creek Mining Endako Expansion Project. This discharge screen is part of the major expansion Thompson Creek Mining is currently undergoing to increase the capacity of its Endako mine. The Joest screen will be fitted with PU screen panels.

Oct 05, 2020· The existing SAG Mill Discharge screen had a single deck design of 3.6m x 8.5m and handled less than 1,900 TPH when screening at 13mm., which quickly became the process limitation. In an attempt to assist the movement of material off the deck and reduce the frequency of overloads, the customer decided to incline the screen and upgrade the drive.

The SAG mill pinion energy, W SDT (kWh/t) and SAG discharge Bond ball mill work index, S d-BWI (kWh/t), are then used to calculate the total energy to grind the ore from 80% passing 152 mm to 80% passing the client specified final product size P 80.This information, along with the ore specific gravity, is used to calculate necessary mill sizes and motor power in industrial applications.

Jul 15, 2021· In 2017, First Quantum approached Schenck Process regarding the supply of mill discharge screens for Cobre Panama's 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'.

Modeling and Simulations two parallel primary grinding lines. Each line consists of a variable 4. Validation speed SAG mill measuring 28 feet in diameter by 11 ft long. The mill 5. Implementation motors are rated at 5,500 HP. At the discharge of each SAG mill is a pair of vibrating screens.

I've got to explain this a little bit. This flowsheet is typical of lines 1 and 3. The SAG mill has a trommel on the discharge end of it. Oversize is returned to the mill by a bucket wheel and water jet. Trommel undersize was pumped to a vibrating screen where the screen oversize was sent back to the mill and the undersize was pumped to the ...

SAG mill discharge screen opening slot size and initiating the overall expert system into the control strategy. Plant data through the first four months of operation showed that the milling circuit was not making the target tonnage rate (1,585 mtph) and, in fact, was peaking at …

Jul 15, 2021· Expande is inviting companies to prequalify for the Scrap Measurement in SAG Vibratory Grinding Screens challenge. Submission Deadline: 15 July 2021 ... with the aim of optimizing the granulometric profile of the mill discharge and optimizing steel consumption based on the milling ability of the mill. ... (screen). The scope of this challenge ...

• SAG Mill Vibrating Screen Oversize • Ball Mill Discharge Technique/Equipment Solution − Suspended Electromagnet − Suspended Magnetic Drum − Trunnion Magnet Pebble Crusher Figures 3 and 4 shows the location of a suspended electromagnet over a pebble crusher conveyor. Fig. …

estimated utilising the SAG mill grate size and discharge screen aperture sizes and the Rosin-Rammler size distribution function, which has been selected for its convenience and since it "has been found to fit many size distributions very well" (Napier-Munn et al.,1996).

US3180581A US210975A US21097562A US3180581A US 3180581 A US3180581 A US 3180581A US 210975 A US210975 A US 210975A US 21097562 A US21097562 A US 21097562A US 3180581 A US3180581 A US 3180581A Authority US United States Prior art keywords trommel discharge annulus mill opening Prior art date 1962-07-19 Legal status (The legal status is an assumption and is not a …

Discharge screen ability ... The change from a SAG mill to an HPGR in primary grinding results in a lower overall power consumption the comminution circuit. In comparison to using staged crushing as ball mill feed prepara-tion, replacing the tertiary circuit with an HPGR frees up ball mill