for maximising the sag mill

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GrindingExpert™

Example SAG Mill Strategy !!! A negative set point change will be applied if any of the following conditions are true:!! • Mill power is high! •Mill sound is very high! •Recycle tonnage is high ! •Screen amps are high! •Mill feed is at its maximum, and bearing pressure remains low! • Mill feed is at its maximum and mill !sound is high!

Calculation Of Sag Mill Weight From Bearing Pressures

SAG Mill Control SAG mills can be optimized for maximum ore throughput or maximum grinding energy efficiency In both cases, precise control of the mill filling percentage is critical (Wills and Napier-Munn, ) Maintaining constant mill weight, as indicated by bearing pressure, is one approach to stabilize the mill.

AUTOMATION ADVANCED CONTROL EXPERT (ACE)

• Increased SAG mill throughput by 5.9% and reduced energy consumption per tonne by 5.4% SAG Mill ACE BENEFITS • Automatically account for changes in variation of particle size or ore hardness • Minimize production disturbances • Maintain optimal production by minimizing changes to mill speed • Maximize production rate while providing

Autogenous mill and semi-autogenous mill

The maximum feed size is between 200 mm and 500 mm. The AG/SAG mill is normally installed upstream of a tube mill operating in closed circuit with hydrocyclones. The material discharged from the AG/SAG mill is either fed directly to the tube mill or first screened. If a screen is used, the screen overflow of the AG/SAG mill is returned for

Sino Grinding

The longevity and overall health of the grinding media is necessary for maximum performance. Other Grinding Media Applications. In addition to high impact SAG mill grinding, media is used in other types of milling such as the finer grind of ball mills, tower mills, vibration mills and regrind mills. Many variables influence the size reduction

Optimization of a SAG Mill Energy System: Integrating Rock

Jul 01, 2019· An optimization is carried out to minimize the yearly cost of energy for the operation of the SAG mill. This cost includes the energy consumption cost in $/kWh and the capital cost for the PV-BESS infrastructure, prorated over the life of the battery system, accounting for the discount rate through an annuity factor (Pamparana et al. 2019a, b).The energy requirements are defined by the SAG

What's the Difference Between SAG Mill and Ball Mill

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.

to Design and Supply the World's Largest SAG Mill in

Oct 05, 2010· has been selected to design and supply a 42ft x 25ft, (12.8m x 7.6m) 28MW gearless SAG mill, plus two 26ft x 42ft, (7.9m x 12.8m) 15.6MW ball mills and two VTM-1500-WB VERTIMILLS® for Newmont Mining's Yanacocha Conga copper-gold project in Peru. The 42ft diameter SAG mill is the world's largest and the first of its kind.

Geometallurgical Grinding and Flotation Design: Maximizing

Flotation Design: Maximizing the use of available information Leonardo Flores, Claudia Velásquez, Luis Valencia, Douglas Hatfield, David Hatton SGS Minerals Services . Model (combines with SAG Mill Model) SMC 185 Hardnesss variability input into JKSimmet for SAG Grinding Model

SAG Mill Process Control

If the SAG mill is not intended to be the rate-limiting step in a process plant, then it is best to adjust the SAG load (and power) to hold a constant tonnage to satisfy another constraint elsewhere. Underground mines are an example: the hoisting capacity of the mine shaft is the rate-limiting step in the process, and the SAG mill must adapt to

Revolutionary Drive Controller for Gearless Mills

power demand, and in order to cope with maximizing throughput, and optimize grinding efficiency, the is increasingly minerals industry relying on the robust Gearless Mill Drive (GMD) solution. This paper describes the new features introduced with the revolutionary ABB drive controller for Gearless Mills, and explains the benefits this can bring to

maximizing throughput on sag mill

Knowledgescape's mill scanner is the ultimate tool for increasing SAG mill throughput and reliability GrindingExpert™ isn't just about SAG mills Our GrindingExpert™ solutions include ball mill strategies that achieve the target grind size while maximizing throughput, or when the circuit is SAG mill limited, achieve the finest grind.

SAG mill optimisation & increasing throughput at Phu Kham

The work involved participating in and overseeing the redesign of the SAG mill liner systems and developing operational strategies for maximising throughput through to the end of mine life. Ausenco's comminution optimisation tool, Ausgrind, was used to benchmark and analyse plant data with empirical models, predict circuit performance for

Autogenous and Semi-Autogenous 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.

Outotec presents the world's largest SAG mill

Jul 08, 2012· The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec's patented Turbo Pulp Lifter (TPL™) Technology.

Semi-autogenous grinding (SAG) mill liner design and

In existing mills, a partial retrofit solution for increasing pulp-lifter depth is to increase the depth of the pulp-lifter channel towards the centre of the mill in a tapered pulp lifter (see Fig. 15). Another approach (for unidirectional mills) is to use pulp lifters with pulp-lifter channel walls (normally at a right-angle to the head, Fig. 13) angled downwards from the grate towards the head (i.e., downwards to the right with .

Maximising SAG mill throughput at Porgera gold mine by

Request PDF | On Sep 1, 2001, M. Lam and others published Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation | .

Grindin' at the Mill

Mill throughput is a key driver for maintaining profitability at Mt Keith because of the low head grade (~0.5% Ni) and inherently low nickel recoveries due to the mineralogical makeup of the ore. The Nickel West Mt Keith Concentrator (NMK) has 2 parallel grinding modules consisting of one SAG Mill and one BALL Mill per module.

Gearless mill drives

Maximum availability and productivity. Go gearless to meet your business objetives by exceeding standard availability targets in your grinding operations. ABB's GMD is the most powerful mill drive system in the market to power semiautogenous (SAG), ball and autogenous (AG) mills, This 'workhorse' for grinding operations combines a robust

MILLING CONTROL & OPTIMISATION

Figures 8 and 9 on the right show results from a gold plant's SAG mill achieved with MillStar's Segregated Ore Feed Controller combined with the Power Optimiser: • The standard deviation of the mill feed control is greatly Maximum Std Dev Std Dev 7.21 0.627 3.91 0.363 42 42. Comparison of Plant vs MillStar Mill Feed Control Feed Rate

Maximising SAG mill throughput at Porgera gold mine by

Request PDF | On Sep 1, 2001, M. Lam and others published Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation | .

Optimizing your SAG mill operation

Mar 21, 2007· The mill discharge from these mills consists of slurry, which goes to the ball mills for further grinding, and coarse pebbles/rocks, which are crushed and sent back to the mill. To maximize the capacity of these circuits, the general practice is to use grates with pebble ports (reaching 100 mm) instead of normal grate openings to increase the

Skid-Mounted Mills

Mill components need to be monitored and inspected for acceptable limits in order to achieve maximum life of the mill components. Periodic inspection is a pre-requisite for an efficient maintenance program. By monitoring and inspecting the mill and associated equipment you will obtain sufficient information to schedule maintenance on components

maximizing throughput on sag mill

Knowledgescape's mill scanner is the ultimate tool for increasing SAG mill throughput and reliability GrindingExpert™ isn't just about SAG mills Our GrindingExpert™ solutions include ball mill strategies that achieve the target grind size while maximizing throughput, or when the circuit is SAG mill limited, achieve the finest grind.

Autogenous mill and semi-autogenous mill

The maximum feed size is between 200 mm and 500 mm. The AG/SAG mill is normally installed upstream of a tube mill operating in closed circuit with hydrocyclones. The material discharged from the AG/SAG mill is either fed directly to the tube mill or first screened. If a screen is used, the screen overflow of the AG/SAG mill is returned for

SAG Mill Optimization using Model Predictive Control

exhibits many of these aspects. Maintaining the SAG mill weight at the optimum value is critical for achieving maximum grind rate efficiency and mill production (Powell, M.S., van der Westhuizen, A.P., & Mainza, A.N. 2009). However, SAG mill weight is difficult to control as the dynamic response changes as the mill approaches maximum capacity.

An ITT Brand Goulds SRL

• Sag Mill • Rod & Ball Mill • Primary and Secondary Cyclone • Thickener Feed • Flotation Feed • Tailings The SRL-XT has extra-thick rubber components that are up to three times thicker than standard rubber-lined pumps. Its heavy-duty design makes it ideal for the toughest applications, especially where coarser slurries are involved.

Major Mines & Projects

The SAG mill discharge was delivered to a rod mill for production of a nominally minus 28-mesh feed to a 2- stage agitated sulfuric acid leaching circuit. The 2-stage leaching configuration was common at the time with the objective of maximizing uranium extraction while reducing acid consumption.

Boost the performance of your SAG Mill

Enhanced mill performance. SAGwise total process control uses specially designed acoustic sensors and proprietary process control software to monitor and respond to critical impacts inside your SAG Mill. Conditions inside your mill are automatically adjusted to minimise liner damage, stabilise and then optimise the operation of a SAG Mill.

Maximizing profits with fragmentation analysis

Aug 17, 2020· 12% increase in SAG mill throughput USD $7.5 million per month increase in revenue The Peruvian mines illustrate the benefits of using fragmentation analysis to inform the drill and blast process, improving profitability from downstream activities like milling.