Optimizing your SAG mill operation

However, the curved design necessitates redrilling of the mill head and also requires curved grates, which can be quite complicated compared to a simple radial design. The best way to eliminate material problems is to use a grate, peripheral discharge trunnion supported mill or use a grate, open-ended discharge shell supported mill.

Navachab Mine Sag Mill Grate Open Area

Navachab Mine Sag Mill Grate Open Area. SAG mill; grate The Edna May operation is an open pit mine The goal of the next phase of the project was to address the pulp lifters and grate open area . Read More; grate open area in sag mills pharmatechindustries.co. The Edna May operation is an open pit mine located charge in a mill.

Automated condition monitoring of mill ball size ...

Many grates in operation are pegged by grinding media to varying degrees of severity. This paper introduces a comprehensive, accurate and rapid method to measure and track the size and pegging status of each and all grate holes in situ, and therefore provides tracking information on the Open Area of a SAG mill.

Inferential measurement of SAG mill parameters II: state ...

On account of the SAG mill discharge grate characteristics, i.e., high fractional open area (foag), high relative radial position of the open area (γ), and high relative radial position of the outermost aperture (r n), the mill discharge flow is assumed to be only through the grinding media and that no slurry pool exists at the toe of the charge.

sag mill grate design

Different combinations of SAG mill ball charge and grate open area were tested until 2006. A higher load level was achieved after several changes in the grate design that prevented both liner and grate breakage. Upon resolution of issues related to the mill grate design, the project achieved the target throughput of 41 kt/d. Phoenix

SAG Mill Liner Design

To a more significant degree than in other comminution devices, SAG Mill Liner Design and Configuration can have a substantial effect mill performance. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.

sag mill grate design

grate open area in sag millsmexican-design . The design of grate/pulp lifters in SAG mills has a by changes in grate open area and charge Lifters on Sag Mill Performance_sanjeeva_latchireddi 7/27 Online Grates Opening In Sag Mill. Chat Online; AN OVERVIEW OF …

grate open area in sag mills

effect of grate discharge area of sag mill performance. high efficiency grate discharging ball mill. May 14, 2018 Introduction: Modelling SAG milling power and specific energy consumption Oct 7, 2014 that many circuits can be made more energy-efficient by modify- ing their firstly predicted using the SAG mill feed F80 and the ball mill cyclone mills, grate discharge, with high ball loads and ...

ARE SAG MILLS LOSING MARKET CONFIDENCE?

Different combinations of SAG mill ball charge and grate open area were tested until 2006. A higher load level was achieved after several changes in the grate design that prevented both liner and grate breakage. Upon resolution of issues related to the mill grate design, the project achieved the target throughput of 41 kt/d. Phoenix

area in sag mills

The SAG mill was designed to treat 2 065 t h −1 of ore at a ball charge of 8 volume total filling of 25 volume and an operating mill speed of 74 of critical The mill is fitted with 80 mm grates with total grate open area of 7 66 m 2 Hart et al 2001 A 4 5 m diameter by 5 2 m long trommel screens the discharge product at a cut size . Get More

Overflow Versus Grate Discharge Ball Mills: An ...

A set of experimental test work has been carried out in a continuous pilot ball mill of 0.41m X 0.56 m (diameter X length) at different mill speeds, percent solids and discharge mechanism. The results of study on material flow through a grate discharge tumbling mill verses an overflow tumbling mill are presented to emphasize the effect of ...

Modelling of the Performance of AG/SAG Mills

Transport of slurry through the mill is described by a function which relates the hold-up of slurry, grate design, grate open area and mill speed to the volumetric discharge rate through the grate (Morrell and Stephenson, 1996): Jp = k Q0.5 g-1.25 A-0.5 f0.67 D-0.25 (7) where. Jp = fractional slurry hold-up. D = mill diameter (m)

Effect Of Grate Discharge Area Of Sag Mill Performance

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 13.5% ball charge and 10.8% open area with 3 and 3.5 inch apertures.

SLURRY FLOW IN MILLS : GRATE

between open area and flowrate. However, the range of open area they covered was from 0.5 to 2 per cent of the total grate area, which is much smaller compared to the normal operating range (Napier-Munn et al., 1996). All AG and SAG mills use steel or rubber grates to hold back the grinding media,

mill grate slot

grate open area in sag mills . the mill from the grates in the slot between the grates and the head. The oversize falls into a bucket wheel on the discharge end of the trommel, gets picked up as the trommel revolves and falls into the stationary rock box. A water jet then squirts that oversize back into the mill …

Grinding Circuit

The SAG mill was designed to treat 2,065 t h −1 of ore at a ball charge of 8% volume, total filling of 25% volume, and an operating mill speed of 74% of critical. The mill is fitted with 80 mm grates with total grate open area of 7.66 m 2 (Hart et al., 2001). A 4.5 m diameter by 5.2 m long trommel screens the discharge product at a cut size ...

(PDF) Slurry flow in mills: Grate

RPL, 30% charge volume, 7.05% grate open area) Inf lu en ce of charg e vol u me on p erf orman ce of pu l p l ift ers Figu re 10 sh o ws th e infl ue nc e of cha r ge vol u me o n t he disc ha r ...

Slurry flow in mills with TCPL — An efficient pulp lifter ...

Considering the shortened mill length (from 3.66 to 3.48 m), smaller grate hole size (from 26.8 to 18.5 mm) and reduced grate open area (from 10.47% to 8.16%), the load volume is expected to be more than the pre-installation condition for the same feed rate.

China SAG and AG Mill Liner factory and manufacturers | H&G

As a casting foundry, HG Casting also has own SAG mill liner design. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered. Each of these topics has had a considerable amount of research, and numerous case studies of evolutionary liner design have been published.

opening in sag mill

grates opening in sag mill korea;, Why Do We Need Such A High Recirculating Load On Our Ball Mill, The open area of new grates can be calculated from drawings . [7/27 Online] factors affecting the performance of the sag mill, factors affecting the performance of the sag mill [ 46 - 5696 Ratings ], The role of SAG mill grate open area and ...

Grates Hammer Crushergrates Opening In Sag Mill

Sag Mill Optimum Charge Size In Venezuela r. Problems 91 in an sag mill the dimensions of the mill were 975 m 35 m and the specific gravities of the mineral and that of the balls charged were 41 and 79 respectively read more grates hammer crushergrates opening in sag mill. Online Chat Ball Mill Grate Cleaning Hitlers Hollywood r

grates opening in sag mill

SAG Mill Liners and Grates Pebble Crushing The Cadia mill SAG mill lining system was developed based on The two MP1000 pebble crushers have had problems with tramp metal. discharge end of the recycle pebble conveyor. in 52 pieces The first set (and replacements for some six months) of trommel panels (maximum 2.

Slurry flow in mills: grate

Influence of open area on discharge rate through the grate-only and grate-pulp lifters with medium size radial pulp lifter (MRPL): (a) grate-only discharge and (b) grate-pulp lifter discharge. However, with the pulp lifters fitted, the discharge rate was found to marginally decrease up to 7.05% open area and then remained constant with further ...

SAG Mill Liner

SAG Mill Liner Design. As a casting foundry, MGS Casting also has own SAG mill liner design. In general terms, lifter spacing and angle, grate open area and aperture size, and pulp lifter design and capacity must be considered.

Grate liners | Magotteaux

Designed for discharge efficiency The role of the grate is to allow the discharge of the material ground in the mill via the slots. With our range of alloys and design experience we can offer the longest possible lifetime with the optimal grinding efficiency. The design of the grates will depend on: Drilling pattern Mill speed (rpm) Maximum grinding media diameter (mm) Grinding media filling ...

Improved Relationships for Discharge in SAG/AG Mills

(SAG) mills. In order to optimize this section, the skills to accurately model and understand its underlying mechanisms are required. 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