effect of grate discharge area of sag mill performance

Equipment » effect of grate discharge area of sag mill performance effect of grate discharge area of sag mill performance the of and to a in that is was he for it with as his on be

(PDF) Understanding the effects of liner wear on SAG mill

the effects of grate wear on mill performance to be quantified Fig 13: Breakage rates of all surveys The calculated breakage rates (Fig 13) will be a useful measure of the ch ange in mill

Improved Relationships for Discharge in SAG/AG Mills

The literature exposed a clear lack of previous research on the influence and performance of grate/pulp lifter design in AG/SAG mill discharge The current understanding from literature lacks knowledge of mill content size distribution and its effect on discharge through the grate …

Effect Of Grate Discharge Area Of Sag Mill

Effect Of Grate Discharge Area Of Sag Mill Performance The Selection and Design of Mill Liners MillTraj The Selection and Design of Mill Liners 36ft SAG mill the number of Outer Head Liners was reduced from 36 to 18 generally now used for discharge grates

STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG MILL …

The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill's performance [17] [18][19][20][21] The initial

Overflow VS Grate Discharge Ball or Mill - Why Retrofit

Types of Ball Mills The overall life of the discharge end parts generally is greater than that of the feed head liners or shell liners The discharge end of the Grate Discharge Ball Mill has at least ten times the discharge opening area, through the grate slots, compared to the common trunnion overflow type mill

Overflow Versus Grate Discharge Ball Mills: An

In grate discharge mills the product is discharged primarily due to hydraulic gradient from the feed end to discharge end Hence there is a possibility for much quicker transport of material through the mill, which is being accomplished in overflow mills by higher circulating load

Turbo Pulp Lifter (TPLTM) - An Efficient Discharger to

pump capacity, the pulp lifter design affects the discharge capacity (or mill throughput) of the SAG/AG grinding mills The general arrangement of AG/SAG mills discharge system is shown in Figure 1 BREAKAGE DISCHARGE Figure 1: Schematic of a typical sag mill operation

Improving Autogenous/Semi-Autogenous Grinding …

The discharge of water from pulp lifter in pilot scale mill is shown in Figure 5 and the discharge of slurry from single stage SAG mill operating at 13 rpm (78 per cent critical speed is shown in Figure 7 It can be seen from Figure 7 that the discharge is occurring in a narrow space between the 130 and three o’clock positions

effect of grate discharge area of sag mill performance

Equipment » effect of grate discharge area of sag mill performance effect of grate discharge area of sag mill performance the of and to a in that is was he for it with as his on be

effect of balls charge on sag mill performance - lebhvbe

Effect Of Grate Discharge Area Of Sag Mill Performance Over 80 comminution and minerals processing Ore charge, ball load and material flow effects on an energy based SAG mill AG/SAG mill performance for grate discharge mills

Performance characterisation of AG/SAG mill pulp lifters

AG and SAG mills of 12–23 MW power draw are at the forefront of size reduction for mineral extraction in most of the mining operations around the world The pulp discharge mechanism, consisting of a grate and pulp lifter arrangement, is an integral component of these mills The grate retains over-size particles in …

STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG MILL PERFORMANCE

The discharge grates of the SAG mill were identified as a key component in the SABC circuit, and their design is a crucial factor in the mill's performance [17] [18][19][20][21] The initial

STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG MILL …

crusher, Table 3 The interior of the mill is illustrated in Figure 1, showing the length and filling of the mill, and low lifters on top of standard AMS grid type liners The detail shows sections of the discharge grate (18mm round holes extending to near the centre of the grate), and pebble ports (75mm round holes)

Turbo Pulp Lifter (TPLTM) - An Efficient Discharger to

discharge pump (grate and pulp lifters) is operating Similar to the impeller design affecting the Performance of 26ft SAG mill with TPLTM The world’s first installation of TPL™ was done in a 26ft diameter by 125ft EGL SAG mill at Cortez Gold Mines – a Barrick/Kennecott plant in Nevada, USA An Efficient Discharger to Improve SAG

grate open area in sag mills - cakecrazycoza

effect of grate discharge area of sag mill yvtc Mill LinersFL effect of grate discharge area of sag mill rate way the critical wear areas of your mill and thus estimate and calculate the useful lifeabrasion and impact:The grinding capacity can be easily affected by the liner design,discharge and support grates …

The Effect of Aspect Ratio on the Grinding Efficiency of

The Effect of Aspect Ratio on the Grinding Efficiency of Open and Closed Circuit AG/SAG Mills in which the mill speed, grate open area and the position of the apertures were systematically

Optimization of mill performance by using - SciELO

mill performance could become worse or better by putting in a new shell liner Data from pilot plant test work illustrates the influence of the shell lifting effect on the grind for a primary grinding duty Figure 5 shows the evolution of the mill discharge product size in relation to the lifting effect of the liners

SAG MILL DISCHARGE SCREENS-TROMMEL vs VIBRATING …

SAG MILL DISCHARGE SCREENS-TROMMEL vs VIBRATING probably one of the nastiest bits of mill design for a grinding circuit, and that is the choice of what do you use on a SAG mill discharge? Do you use 2-inch grates in the mill and we’ve even had 2-1/2-inch grates just to see what they would

impact ball mill discharge size - sunflowerestatescoza

Overflow VS Grate Discharge Ball or Mill - Why Retrofit was Samples were taken of the mill feed and discharge streams at the different The effect of these on actual mill performance or grinding efficiency of ball & particle-on-particle impact (SAG Mills) The discharge of the AG/SAG mill is fitted with a grate discharge, where ground

(PDF) Slurry pooling and transport issues in SAG mills

Slurry pooling and transport issues in SAG mills the efficiency of mill discharge via grate, pulp lifter channels, and discharge trunnion determines the mill throughput undertaken in

(DOC) Main text | Gurubasayya Swamy - Academiaedu

Effect of feed size on SAG mill performance Feed characteristics of ROM ore have large impact on SAG mill performance Results obtained from the study of effect of feed size on mill throughput are presented in table 6 From the results obtained it is found that the mill performance seems to be the best when feed contains at least 30 to 40% of +3in

The effect of grate design on the behaviour of grate

The effect of grate design on the behaviour of grate-discharge grinding mills Int J Miner Process, 18: 85--105 A model for the effect of flowrate and viscosity of slurry on the hold-up of slurry in a grate-discharge grinding mill has been developed

Optimizing your SAG mill operation - International Mining

Optimizing your SAG mill operation 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)

dependable performance grate discharge ball mill

It has been widely accepted to go for grate discharge ball milling when a in performance improvement of AG/SAG mills and the limited research work on Contact US Figure 12: Schematic Diagram of a Grate Discharge Grinding Mill effect of liner/lifter profile on the discharge capacity of dry ball mill products and it is a

1-way-coupled pilot SAG mill draft1 - publicationscsiroau

flow within a SAG mill grinding chamber (ignoring the solids charge), flow through the grate, pooling in the pulp chamber and discharge flow along the pulp lifters was demonstrated using SPH by Cleary et al (2007) Recently, CFD models of flow from the pulp chamber have been presented by Rajamani et al (2011) and liming et al (2011)

DISCRETE ELEMENT METHOD MODELING OF PULP LIFTER …

DISCRETE ELEMENT METHOD MODELING OF PULP LIFTER PERFORMANCE Pengbo Chu Department of Mechanical Engineering McGill University Montreal, Canada August 2011 _____ A thesis submitted to McGill University in partial fulfillment of the requirements for …

mineral ball mill discharge trajectory xls - zerotoherocoza

Improved Relationships for Discharge in SAG/AG Mills - UQ eSpace Comminution is an essential component of mineral processing operations and its proper operation and of grate/pulp lifter design in AG/SAG mill discharge Get Price ball mill performance

Advanced Simulation for Semi-Autogenous Mill Systems: A

Advanced Simulation for Semi-Autogenous Mill Systems: A Simplified Models Approach design control laws for a given application and subsequently to optimise its performance and process control SAG mills (see Figure 1) are presently one of the most widely used Advanced Simulation for Semi-Autogenous Mill S ystems: A Simplified Models

grates opening in sag mill - palmietvalleyestatecoza

May 8, 2015 Pegging of the discharge grates in SAG mills often occurs and this will The effect of new grates can be simulated in terms of new open area, Get Price The SCSE Parameter SMC Testing are indirectly related to ore hardness They were originally developed for use by the AG/SAG mill o grate open area of 7% o apertures in the grate are 100

(PDF) Optimisation of the Sossego SAG mill | Mauricio

SAG mill throughput as a function of grate open area As shown in Figure 2 the grate open area has a strong effect on Sossego SAG mill throughput The nominal capacity of the circuit should be achieved with a combination of 135% ball charge and 108% open area with 3 and 35 inch apertures

Modelling of the Performance of AG/SAG Mills

MODELLING OF THE PERFORMANCE OF AG/SAG MILLS by Homero Delboni Jr1 and Steve Morrell 2 1 Research Scholar The products of these breakage events may then leave the mill via the discharge grate due to entrainment by slurry, or remain to undergo further breakage classification performance of the grate

Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1, Principal Consulting Engineer Sami Hindstrom2, Manager, •The future effect on production levels as changes in metal prices occur SAG mill is an investment that can produce handsome returns if extra production is needed or

effect of balls charge on sag mill performance new zealand

Effect Of Grate Discharge Area Of Sag Mill Effect Of Grate Discharge Area Of Sag Mill Performance circuit followed by a new proposed ball mill in closed circuit Area Of Sag Mill Effect Of Alfa Get A Free Quote

Over 80 comminution and minerals processing publications

Influence of feed size on AG/SAG mill performance SAG 2001, Vancouver, pp 203-214, Dept of Mining and Mineral Process Engineering, Univ of British Columbia 41

Optimization of the Design of SAG Mill Internals Using

of SAG mill performance through 1 Changes in liner/lifter design to maximize throughput while maintaining acceptable wear levels 2 Changes in ball size to maximize particle breakage without producing exceptionally high impact forces 3 Changes in grate and pan lifter designs to decrease internal mill recycle and increase throughput

Performance enhancement tools for grinding mills - SAIMM

PERFORMANCE ENHANCMENT TOOLS FOR GRINDING MILLS 103 The need for new instruments The load movement inside of a SAG mill can be monitored through the audible impacts of the falling stream Effect of mill speed and lifter profile on load trajectors Figure …