## Overflow VS Grate Discharge Ball or Mill - Why Retrofit

2015-6-24 · The discharge end of a Grate Discharge Ball Mill is fitted with grate sections approximately 3½” thick, made of special heat treated alloy steel developed for this

## How a Grate Discharge Ball Mill Works

2015-8-13 · 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

## 38' X 22' EGL METSO GRATE DISCHARGE SAG MILL, 26,000

Grate discharge Diameter 38′ Length 25’5″ flange-to-flange EGL 22′ Components / Inclusions Feed chutes Discharge grates Steel pulp lifters SAG mill trommel

## SAG Mill Liners for Discharge Grate - EB Castworld % SAG ...

SAG Mill Liners for Discharge Grate Special Features: The material of SAG mill liner castings are low C or high C Cr-Mo Alloy steel,which depends on the

## Improved Relationships for Discharge in SAG/AG Mills

2019-10-9 · (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

## Converting a ball mill from overflow to grate discharge ...

2020-6-23 · Converting a mill from an overflow to a grate discharge arrangement leads to an increased power draw. This happens because the installation of the grate

## Slurry flow in mills: grate-pulp lifter discharge systems ...

Pulp lifters, also known, as pan lifters are an integral part of the majority of autogenous (AG), semi-autogenous (SAG) and grate discharge ball mills. The

## THE INFLUENCE OF SHELL, GRATE AND PULP LIFTERS ON

The charge motion and breakage of particles inside the mill depends on the shell lifters design, while the discharge of ground particles is controlled by the grate

## Taking Control of the Mill Feed R2 - orway.au

2014-10-1 · Ball Mill Power - Conversion of the ball mill to a grate discharge unit should allow full motor power (4.1 MW) to be utilised. Further, a coarser product is

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

8 - 9 August 2011 Perth, WA. Fig. 1- Increase in throughput over liner life for a large SAG mill. Unfortunately however, the 32 ft SAG mill that was studi ed for

## Open Ended Discharge Grinding Mill - Outotec

Furthermore, the spider and discharge cone are segmented and removable. Together these solutions minimize the time and cost associated with mill relining and discharge-end servicing. Optimized discharge-end serviceability is particularly important for an open-ended mill as the grate

## Outotec ® Grinding technologies - Outotec - PDF

SAG and AG mills with open-ended discharge arrangements are usually more efficient than grate discharge arrangements. However, as an alternative to an open ended discharge arrangement Outotec offers the patented Turbo Pulp Lifter® (TPL) for suitable applications. Turbo Pulp Lifter (TPL) TPL is a revolutionary pulp lifter design that reduces...

## Converting a ball mill from overflow to grate discharge ...

2020-6-23 · Converting a mill from an overflow to a grate discharge arrangement leads to an increased power draw. This happens because the installation of the grate discharge arrangement enables the mill to run with a lower level of slurry due to it being no longer necessary for the slurry to build up inside the mill until it overflows from the mill discharge.

## 38' X 22' EGL METSO GRATE DISCHARGE SAG MILL, 26,000

Grate discharge Diameter 38′ Length 25’5″ flange-to-flange EGL 22′ Components / Inclusions Feed chutes Discharge grates Steel pulp lifters SAG mill trommel Mill braking system Hydraulic jacking system Portable hydraulic power unit. Motor and Drive

## how does a grate discharge mill - chambres-hotes-vannes.fr

Oututec grate discharge sag mill. how does the sag mill works ow does the sag mill works june 15, 09 by cnmining 29 commentsow does a sag mill work hot products ball mills are used primary for single stage fine grinding, regrinding, and as the second stage in two et price siemens expands mining portfolio to.

## THE INFLUENCE OF SHELL, GRATE AND PULP LIFTERS ON

The charge motion and breakage of particles inside the mill depends on the shell lifters design, while the discharge of ground particles is controlled by the grate and pulp lifters. The limitations imposed by poor grate and pulp lifter design become increasingly apparent with increasing size of ag/sag mills and their operation in closed circuit.

## Taking Control of the Mill Feed R2 - orway.au

2014-10-1 · Ball Mill Power - Conversion of the ball mill to a grate discharge unit should allow full motor power (4.1 MW) to be utilised. Further, a coarser product is obtained from a grate discharge mill as a consequence of the lower slurry level present in the mill. Grinding Efficiency and Power Utilisation - The circuit was bottlenecked at the SAG mill ...

## STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG

IV-126 Figure 1 The mill interior and details of the discharge grate Figure 2 Ball scats IV-127 Evidence of Excess Scats Mill charge When inspecting the mill charge during the crash stop at the end of

## The influence of mill speed and pulp density on the ...

2009-8-26 · These tests were done with a ∅0.82 x 1 m grate discharge mill with a 30 mm graded ball charge and a 30% filling degree. The mill discharge pulp density was increased from 68.8% to 75.9% solids. The data is summarized in Table III. The example in Table III illustrates that the density has a large influence on the grinding efficiency. In this ...

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

8 - 9 August 2011 Perth, WA. Fig. 1- Increase in throughput over liner life for a large SAG mill. Unfortunately however, the 32 ft SAG mill that was studi ed for this project does not feature ...

## Open Ended Discharge Grinding Mill - Outotec

Furthermore, the spider and discharge cone are segmented and removable. Together these solutions minimize the time and cost associated with mill relining and discharge-end servicing. Optimized discharge-end serviceability is particularly important for an open-ended mill as the grate

## Outotec ® Grinding technologies - Outotec - PDF

SAG and AG mills with open-ended discharge arrangements are usually more efficient than grate discharge arrangements. However, as an alternative to an open ended discharge arrangement Outotec offers the patented Turbo Pulp Lifter® (TPL) for suitable applications. Turbo Pulp Lifter (TPL) TPL is a revolutionary pulp lifter design that reduces...

## 38' X 22' EGL METSO GRATE DISCHARGE SAG MILL, 26,000

Grate discharge Diameter 38′ Length 25’5″ flange-to-flange EGL 22′ Components / Inclusions Feed chutes Discharge grates Steel pulp lifters SAG mill trommel Mill braking system Hydraulic jacking system Portable hydraulic power unit. Motor and Drive

## Optimizing your SAG mill operation - International Mining

2007-3-21 · 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 ...

## STARTLING EFFECT OF BALL SCATS REMOVAL ON SAG

IV-126 Figure 1 The mill interior and details of the discharge grate Figure 2 Ball scats IV-127 Evidence of Excess Scats Mill charge When inspecting the mill charge during the crash stop at the end of

## Taking Control of the Mill Feed R2 - orway.au

2014-10-1 · Ball Mill Power - Conversion of the ball mill to a grate discharge unit should allow full motor power (4.1 MW) to be utilised. Further, a coarser product is obtained from a grate discharge mill as a consequence of the lower slurry level present in the mill. Grinding Efficiency and Power Utilisation - The circuit was bottlenecked at the SAG mill ...

## Optimization of mill performance by using

2010-4-23 · balls and blocking the grate discharge. Optimization of mill performance by using online ball and pulp measurements by B. Clermont* and B. de Haas* Synopsis Ball mills are usually the largest consumers of energy within a mineral concentrator. Comminution is responsible for 50% of the total mineral processing cost.

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

2021-2-17 · 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

## The influence of mill speed and pulp density on the ...

2009-8-26 · These tests were done with a ∅0.82 x 1 m grate discharge mill with a 30 mm graded ball charge and a 30% filling degree. The mill discharge pulp density was increased from 68.8% to 75.9% solids. The data is summarized in Table III. The example in Table III illustrates that the density has a large influence on the grinding efficiency. In this ...

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

8 - 9 August 2011 Perth, WA. Fig. 1- Increase in throughput over liner life for a large SAG mill. Unfortunately however, the 32 ft SAG mill that was studi ed for this project does not feature ...