grates opening in sag mill korea

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grates opening in sag mill korea

Ball and Rod Mill - PK Mining

Grate ball mill. Type G Grate Ball Mill is a cylindrical mill equipped with grate and lifter at the discharge end, designed to be most efficient for coarse grinding in an open or closed circuit with a classifier. Type G Ball Mill can handle 25mm feed. To grind such a large feed efficiently, it comes equipped with thick shell lining and large balls.

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

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.

SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING …

SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING Tony Moon, RTZ What I'd like to talk about is 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 vibrating screens or trommel screens? What many of you probably don't realize is that at

Start-up and Early Optimisation of the New Afton ...

Start-up and Early Optimisation of the New Afton Concentrator. ... changes to the SAG and ball mill grinding media sizes, larger SAG grate openings, reduced SAG discharge screen-deck aperture size and an increase in the maximum ball mill power draw limit. Metal recoveries at New Afton are primarily limited by liberation in the coarser size ...

(PDF) Slurry pooling and transport issues in SAG mills

Slurry pooling and transport issues in SAG mills ... 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 ...

Paper # 25 - Copper Mountain Overview on the Grinding ...

The Copper Mountain SAG mill is 10363 mm [34 feet] in diameter and 6096 mm [20 feet] long. It is a grate discharge mill with an inside diameter of 10363 mm [34 feet] and a grinding length of 5334 mm [17.5 feet]. The mill is driven by two 8,500 horsepower ABB motors. Figure 2 - The 34' x 20' SAG mill

Overflow VS Grate Discharge Ball or Mill - Why Retrofit

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. The discharge grates are designed to run clean and free of any blinding or choking. The pulp level in the mill may be varied by merely changing the pulp dilution.

Modelling SAG milling power and specific energy ...

Modelling SAG milling power and specific energy consumption including the feed percentage of intermediate size particles M. Silva, A. Casali⇑ Mining Engineering Department, Universidad de Chile, Beauchef 850, Santiago 8370448, Chile

Exercise 5 in Demo: New Discharge Grates in SAG mills ...

May 08, 2015· Pegging of the discharge grates in SAG mills often occurs and this will result in a drop in throughput. The effect of new grates can be simulated in terms of new open area, size of apertures or ...

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 ...

A Method to Determine the Ball Filling, in Miduk Copper ...

After SAG mill, a trommel screen produces two over and under size materials which the oversize part is circulated into SAG mill and undersize reports to hydrocyclone for further process. Ball filling identify was implemented in this work using mill`s load sampling and ball abrasion test.

Improved Relationships for Discharge in SAG/AG Mills

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 at various aperture sizes and radial positions. It also indicates that in

OCEANAGOLD PROVIDES AN UPDATE TO HAILE …

grate sizing of the SAG mill. The current steel discharge grate opening in the SAG mill are inadequately sized to allow worn steel grinding media to pass through. This has resulted in excessive amount of small grinding media inside the mill reducing its effectiveness. This in turn, has created

SAG Mill - Semi-Autogenous Grinding Mill

Fresh ore is continually conveyed into the mill feed chute and is crushed until small enough to pass though the openings in the discharge grates. The feed rate is limited by the horsepower available to turn the mill and the and the maximum weight the hydrostatic trunnion bearings which support the turning mill shell can withstand.

REVESTIMIENTOS DE MOLINOS 2016-12 - global.weir

multiple apertures per grate to large SAG/AG mill applications with integrated reinforcement for structural integrity with open pebble ports for maximum open area. Vulco® mill linings are available for small regrind mills to our extremely specialised "one off" designs for SAG and AG applications.

A = 69.3, b = 0.54 and Axb = 37.4 (Wtd Fit)

match the specific energy required for an existing or a planned AG/SAG mill due to differences in the many operating and design variables such as feed size distribution, mill dimensions, ball load and size and grate, trommel and pebble crusher configuration. However, the "Standard" circuit specific energy

1-way-coupled pilot SAG mill draft1 - publications.csiro.au

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. Poor transport of finer ground material can adversely affect grinding leading to excess energy consumption and over-grinding of fine material.

SAG Mill Liner - mgscasting.com

Based on experience, mill liner designs have moved toward more open shell lifter volumetric capacity and a grate design to facilitate maximizing both pebble-crushing circuit utilization and SAG mill capacity. Mill throughput is maximized with shell lifters between ratios of 2.5:1 and 5.0:1.

Grinding Circuit - an overview | ScienceDirect Topics

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 ...

Comminution Services - SGS

scale SAG mill, the SPI® test ... grate open area, etc.) or to integrate ... Comminution Services Subject: SGS brings a true best-of-breed solution to grinding circuit design, optimization and production forecasting. With our approach, you will truly optimize the comminution design for your orebody and maximize your return.

CASE STUDY: PROMINENT HILL - outotec.com

and discharge grates on the Ø34' SAG mill. However, following inspection, the scope of works was extended to include replacement of all the shell plates, along with the discharge end outer grates. The Ø24' ball mill also required feed end outer and inner plates, as well as shell and discharge plates, to be replaced. PROCESS

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 …

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill Operator ...

SAG Mill Circuit Example – Gold Processing SAG mill circuit example for gold processing [image: (135-6-3)] AG/SAG Mill. AG/SAG mills are normally used to grind run-off-mine ore or primary crusher product. Wet grinding in an AG/SAG mill is accomplished in a slurry of 50 to 80 percent solids. 2D and 3D simulations of particles in a SAG Mill

Design of the 40 foot SAG Mill Installed at the Cadia Gold ...

DESIGN OF THE 40 FOOT DIAMETER SAG MILL INSTALLED AT THE CADIA GOLD COPPER MINE ... Grate aperture SAG mill base power was estimated from pilot plant data at 7.8 kWh/t, the ... Open …

Autogenous and Semi-Autogenous Mills | FL

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.

Sag Mill Liners on sales - Quality Sag Mill Liners supplier

Sag Mill Liners, You can Buy good quality Sag Mill Liners, we are Sag Mill Liners distributor & Sag Mill Liners manufacturer from China market. ... Discharge Grate Liners for SAG Mills EB17004 Detailed Description: Material Grade:Cr-Mo Alloy Steel; Quality Level: As per National Standard & International Standards. Production Process: Sand ...