sag mill discharge grates

Prediction of 3D slurry flow within the grinding chamber ...

Slurry flow, including flow through the charge in the grinding chamber, through the discharge grates, along the pulp lifters and its discharge from the mill is an important contributor to the efficiency of the grinding process within a SAG mill.


REMOVAL ON SAG MILL PERFORMANCE Malcolm Powell Head Comminution Group, Mineral Processing Research Unit, ... discharge grate (18mm round holes extending to near the centre of the grate), and pebble ports (75mm round holes). ... as to maintain the total ball load in the mill. Stocks of replacement balls were potentially a bit low for this, but ...

SAG Milling in Australia -Revised Submission

efficiency of the mill discharge system for slurry and pebble removal, and lining ... • Use of DEM and CFD for optimising the design of mill liners, grates and pulp lifters • Innovative pulp lifter systems ... circuiting of the SAG mill and ball mill additions topping the list.

Optimizing Performance of SABC Comminution Circuit of the ...

circuit included an increase in the SAG mill ball charge from 8% to 10% v/v; an increase in the mill ball ... represents the effective grinding length inside the end liners and discharge grates), 6.2 × 9.5 m ... Optimizing Performance of SABC Comminution Circuit of the Wushan Porphyry Copper Mine—A Practical Approach

grate discharge for ball mill -

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 veins like a pump impeller As the mill turns/rotates the slurry is pumped out and discharged Discharge Grates The natural flexibility of

Turbo Pulp Lifter (TPLTM) - An Efficient Discharger to ...

Only the DE – discharge end consisting of grate and pulp lifters, were replaced in the SAG mill. The ball charge was kept same at 9.08%. The ore type that was used for comparing pre and post installation of TPL™, was classified as

mineral processing ore sag mill grates -

Aug 25, 2016· 20' EGL SAG mill, a Raptor 900 pebble crusher and two 24' x 39'6 ball mills. optimization of the SAG mill in terms of discharge grates, ball size and slurry Ore grades averaged 0.33% Cu with a copper recovery of approximately 82%.

VULCO Excellent Wear Resistant Linings Solutions

the grate discharge mill end Above : Typical SAG/ball mill circuit. Grate discharge head liners Non-plugging grate openings, positive seals between manufactured parts, safety and ease of installation, and long wearing rubberized compo- ... Wear Resistant Linings ® ...

Achievement of High Energy Efficiency in Grinding Mills at ...

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

Mill power draw models - SAGMILLING.COM

The design of mill liners and SAG mill discharge grates will have a large effect on how efficiently the mill operates and the circuit throughput. All models generally assume that a mill is fitted with "efficient" liners and that the grate design neither limits passage of pebbles (and pulp) nor permits re-circulation of pulp back into the mill.

grate discharing ball mill for gold ore -

May 04, 2018· The newer Ankata underground mine produces ore with similar metallurgical Both the SAG and Ball mill were scheduled for lifters, feed end lifters and plates and discharge grates on the Ø34'. SAG mill.

Improved Relationships for Discharge in SAG/AG Mills

The thesis has provided improvements to the previous AG/SAG mill discharge understanding in terms of discharge rates and grate classification in relation to mill load and operating parameters.


Vulco™ discharge grates have ˚exibility in sizing, shape and location of apertures. Options range from small multiple apertures per grate to large SAG/AG mill applications with integrated reinforcement for structural integrity with open pebble ports for maximum open area.

Mill Lining Systems - Trelleborg Wear Resistant Mill Liner

Discharge Grates and Mill Lining Accessories Grinding mills play a key role in comminution and mineral dressing and are subjected to severe impact and abrasion. Trelleborg designs and manufactures auxillary wear components and accessories for AG, SAG, ball mills and scrubbers.

Ball Mill Discharge Screen | Crusher Mills, Cone Crusher ...

In grate discharge type ball mill a grate is provided at the discharge end of shell. … It can be used both as feeder and scalping screen, … SAG mill trommel or screen – OneMine Mining and Minerals …

mineral processing ore sag mill grates -

Oct 18, 2016· 20' EGL SAG mill, a Raptor 900 pebble crusher and two 24' x 39'6 ball mills. optimization of the SAG mill in terms of discharge grates, ball size and slurry Ore grades averaged 0.33% Cu with a copper recovery of approximately 82%.

Optimizing your SAG mill operation - International Mining

The commercially viable and industry accepted alternate is a grate discharge trunnion supported mill or a grate discharge shell supported mill using pulp lifters. The only way to eliminate the problem of flow-back and carry-over of slurry and pebbles is by optimizing the design of the discharge arrangement.

Semi-autogenous grinding (SAG) mill liner design and ...

needs to respond to the process aspects of mill liner action that are critical to good SAG mill performance, i.e., the impact of shell liners on the grinding action and of grates and pulp lifters on pulp discharge.

FL - SAG/AG Mills

Fuller-Traylor SAG/AG mills range in size from 18' through 40' in diameter with powers as high as 30,000 hp. They feature hydrostatic lubrication and can accommodate either a geared or gearless drive arrangement and are typically grate discharge and use metal liners.

NCP Brochure R - Osborn

assembly at the discharge end of the mill permits retention of a higher ball charge (45%) than is possible in an overflow mill, which has a practical limit of around 40%. Behind the grates are

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.

high quality and grate discharge ball mill

Jun 16, 2017· of grate/pulp lifter design in AG/SAG mill discharge. my research higher degree candidature and does not include a substantial unwavering support and giving me the strength of character to see this through to the end. .


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

Sag Slurry Pooling | Mill (Grinding) | Speed

Figure 4 Los Bronces SAG mill 2 discharge grate As illustrated in Figure 4, the mill has classic massive pebble porting, typical of the operations aiming for maximum pebble discharge rate.


Grate discharge Dry Grate discharge Wet Overflow discharge Wet Figure 8.5 Effect of mill filling on power draft for ball mills. The data is taken from Rexnord Process Machinery ... LG A mill power equation for SAG mills. Minerals and Metallurgical Processing. Feb 1990 pp57-62.

Slurry discharge capacity of autogenous and semi ...

A laboratory based study of tumbling mills has been undertaken in which the mill speed, grate open area and the position of the apertures were systematically varied and their effect on the ...

sag mill grates – Grinding Mill China

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 , the mill from the grates in the slot between the grates and the head The oversize falls

Polycorp - Mining - AG/SAG Mill Liners

AG/SAG Mill Liners. ... We are pioneers in design of both radial and curved pulp lifters. We also design and manufacture Rubber grates and discharge cones. Mining › AG/SAG Mill Liners Polystl Liners. Learn More. Combination Liners. Learn More. Rubber Liners. Learn More. Rubber Metal Pulp Lifters.

grate discharge sag mill -

A SAG mill is characterized by ... continually conveyed into the mill feed chute and is crushed until small enough to pass though the openings in the discharge grates. GET PRICE Mill Lining Systems - Trelleborg Wear Resistant …

The Selection and Design of Mill Liners - MillTraj

The Selection and Design of Mill Liners . ... generally now used for discharge grates where ... material used for SAG mill liners. There are a number of variations with either different carbon or chrome contents. The variations tend to have a bearing on the size of the liner and its section thickness. There is ongoing development within this ...