Message

*

SINGLE STAGE SAG/AG MILLING DESIGN - Orway

2014-10-1  If determined to be reasonably power-efficient, single stage SAG milling is likely to be a comparatively profitable grinding circuit design. xMedium Grind – 80% passing size between 106 and 75 µm. To mill in single stage SAG configuration, the feed must be consistent and the downstream process reasonably capable of handling some fluctuations ...

More

AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

2014-10-1  efficient, single stage SAG milling is likely to be the most profitable grinding circuit design. 2. Medium Grind – 80% passing size between 106 and 75 µm. To mill in single stage SAG configuration, the feed must be consistent, not too coarse or too fine. The downstream process must be able to handle fluctuations in the grind size. If these

More

Power-based modelling of single-stage AG and SAG mill

The single-stage autogenous grinding (AG) or semi-autogenous grinding (SAG) mill is a low-cost option for milling relatively low tonnages. Such circuits consist of an AG or SAG mill that is fed directly from a primary crusher, and the mill product is then classified through a hydrocyclone (or

More

SAG and AG Mill – Amstar Corporation

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. Amstar SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

More

(PDF) SINGLE STAGE SAG/AG MILLING DESIGN

The SAG mill model in the JKSimMet software has not been shown to accurately reproduce the performance of a single stage mill for greenfield design. A review of most modern power models shows that the prediction of specific energy is influenced by the high energy breakage characteristics of the ore (DWi, t 10 , SPI etc.) and the low energy (BWi).

More

Kansanshi Copper Mine - Mining Technology Mining

2021-6-1  The third phase of expansion includes construction of a new 16mtpa sulphide concentrator through a single stage Semi-Autogenous Grinding (SAG) mill, which can be extended up to 25mtpa by adding a ball mill in the future. This phase has been

More

Outotec presents the world's largest SAG mill - Metso

2012-9-21  The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec's patented Turbo Pulp Lifter (TPL(TM)) Technology.

More

SAG Mill Grinding Circuit Design - 911metallurgist

2016-6-6  Single stage AG/SAG milling. AG/SAG mills as a primary grinding stage in a circuit with or without additional stages of comminution. Inclusion of pebble-crushing circuits in the AG/SAG circuit. Circuits above, but with feed preparation including two

More

SAG mills - Metso Outotec

Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Metso Outotec to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW. Today, Metso Outotec is the world leading supplier of gearless SAG

More

AG - Autogenous SAG Semi-Autogenous Mill

2018-4-17  SAG Mill Charge. Defining the charge weight and height for fully autogenous grinding mill requires allowance for the ore specific gravity (and its variations) and accounting for the water content and the fine ore which will fill the interstitial spaces between the large ore pieces. ... For single-stage circuits in which the primary mill

More

SAG and AG Mill – Amstar Corporation

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. Amstar SAG/AG Mills range in size from 4.3m through 12.2m in diameter with powers as high as 28,000 kW.

More

Kansanshi Copper Mine - Mining Technology Mining

2021-6-1  The third phase of expansion includes construction of a new 16mtpa sulphide concentrator through a single stage Semi-Autogenous Grinding (SAG) mill, which can be extended up to 25mtpa by adding a ball mill in the future. This phase has been

More

SAG mills - Metso Outotec

Gearless mill drive (GMD) technology has further expanded the use of large SAG milling allowing Metso Outotec to produce the world's largest SAG mill of 42’ in diameter drawing power at 28 MW. Today, Metso Outotec is the world leading supplier of gearless SAG

More

Outotec presents the world's largest SAG mill - Metso

2012-9-21  The SAG mill design is based on Outotec's proprietary grinding mill technology, developed over decades for maximum reliability and performance. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec's patented Turbo Pulp Lifter (TPL(TM)) Technology.

More

Yanacocha Gold Single Stage SAG Mill Design,

2012-1-1  EGL, 16.5MW single stage SAG mill, to process 5 million tonnes per annum high grade oxide Au/Ag ore. Operational control, feed size distribution, grinding media, mill liner, grate and pulp lifter optimisation have allowed the mill to operate 15-30% above design throughput rates, but with a product P80 coarser than design.

More

Autogenous and Semi-Autogenous Mills FLSmidth

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

More

Optimizing your SAG mill operation - International

2007-3-21  Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm). Single stage AG/SAG mills have to handle large amounts of slurry as they are generally in closed circuit with classifiers whose circulating loads reach as high as 400-500%.

More

FREDA REBECCA SAGMILLING CIRCUIT OPTIMIZATION

2016-6-15  increasing throughput is the single stage Semi autogenous milling (SAG milling), this is to a large extent due to major ore hardness variations and coarse feed size distribution. This work is aimed at optimizing the SAG mills feed size distribution as this is an important parameter that affects milling performance after ore competency.

More

Chapter - M MODELLING, SIMULATION, OPTIMIZATION

2013-5-9  single-stage crushing using a jaw crusher and a single-stage grinding using a Semi-Autogenous Grinding (SAG) mill in closed circuit with a hydrocyclone package. The gold extraction is done by leaching process using cyanidation method through a series of stirred tanks. In this research, an optimization study of Aghdarreh plant grinding circuit ...

More

COMMINUTION DISINTEGRATION

2015-4-24  an existing SABC (SAG mill with recycle crushing and a single stage ball mill). First, a pre-crush stage using HPGR was introduced to minimise the generation of critical size material in the primary mill. The aim was to reduce a portion of the feed material below critical size and generate more fines to decrease the load in the primary mill.

More

Autogenous and Semi-Autogenous Mills FLSmidth

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

More

Yanacocha Gold Single Stage SAG Mill Design,

2012-1-1  EGL, 16.5MW single stage SAG mill, to process 5 million tonnes per annum high grade oxide Au/Ag ore. Operational control, feed size distribution, grinding media, mill liner, grate and pulp lifter optimisation have allowed the mill to operate 15-30% above design throughput rates, but with a product P80 coarser than design.

More

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill

Single Stage SAG Mill. Using SAG instead of AG increases the capacity as well as application range, but will also increase wear costs and still be dependent on “natural” product size being close to the desired. Common circuit in the US and Canada . Single stage SAG mill circuit [image: (135-6-25)]

More

Optimizing your SAG mill operation - International

2007-3-21  Generally, the discharge from AG/SAG mills consists of one or both of the following components: slurry (water and finer particles) and pebbles (20-100 mm). Single stage AG/SAG mills have to handle large amounts of slurry as they are generally in closed circuit with classifiers whose circulating loads reach as high as 400-500%.

More

Freda Rebecca SAG milling circuit optimisation - CEEC ...

2021-6-10  ABSTRACT Simulation work was carried out to analyse how feeding a finer size distribution to a single stage SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect throughput and specific energy consumption using an Excel based milling process simulator developed by Hinde, a comminution specialist who has worked for Mintek for many years.

More

Chapter - M MODELLING, SIMULATION, OPTIMIZATION

2013-5-9  single-stage crushing using a jaw crusher and a single-stage grinding using a Semi-Autogenous Grinding (SAG) mill in closed circuit with a hydrocyclone package. The gold extraction is done by leaching process using cyanidation method through a series of stirred tanks. In this research, an optimization study of Aghdarreh plant grinding circuit ...

More

Improving Autogenous/Semi-Autogenous Grinding

2016-3-9  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 1.30 and three o’clock positions.

More

COMMINUTION DISINTEGRATION

2015-4-24  an existing SABC (SAG mill with recycle crushing and a single stage ball mill). First, a pre-crush stage using HPGR was introduced to minimise the generation of critical size material in the primary mill. The aim was to reduce a portion of the feed material below critical size and generate more fines to decrease the load in the primary mill.

More

GRINDING: Outotec builds world's largest SAG mill ...

The huge mill will offer increased efficiency, effective grinding conditions, 15% greater mill capacity, and reduced energy consumption. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec’s patented Turbo Pulp Lifter (TPL™) technology.

More

ONLINE SAG MILL PULSE MEASUREMENT AND

2012-6-18  ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION SEMI­ ... force value upon a single impact within 100 microseconds. Since the impacts on the load ... stage of comminution in which the particles are reduced in size by a combination of impact and abrasion, either dry or in slurry with water. It is performed in rotating

More

Yanacocha Gold Single Stage SAG Mill Design,

2012-1-1  EGL, 16.5MW single stage SAG mill, to process 5 million tonnes per annum high grade oxide Au/Ag ore. Operational control, feed size distribution, grinding media, mill liner, grate and pulp lifter optimisation have allowed the mill to operate 15-30% above design throughput rates, but with a product P80 coarser than design.

More

AMIT 135: Lesson 6 Grinding Circuit – Mining Mill

Single Stage SAG Mill. Using SAG instead of AG increases the capacity as well as application range, but will also increase wear costs and still be dependent on “natural” product size being close to the desired. Common circuit in the US and Canada . Single stage SAG mill circuit [image: (135-6-25)]

More

Metso to Design and Supply the World’s Largest SAG

2010-10-5  It is situated near the Newmont Yanacocha gold mine, where Metso installed what was then the world’s largest single-stage SAG mill, a 32ft x 32ft (9.75m x 9.75m) EGL mill, driven by a 16.5MW ABB gearless motor, in 2008. That mill design was also

More

Freda Rebecca SAG milling circuit optimisation - CEEC ...

2021-6-10  ABSTRACT Simulation work was carried out to analyse how feeding a finer size distribution to a single stage SAG mill in closed circuit with hydro cyclones at Freda Rebecca Gold Mine would affect throughput and specific energy consumption using an Excel based milling process simulator developed by Hinde, a comminution specialist who has worked for Mintek for many years.

More

Chapter - M MODELLING, SIMULATION, OPTIMIZATION

2013-5-9  single-stage crushing using a jaw crusher and a single-stage grinding using a Semi-Autogenous Grinding (SAG) mill in closed circuit with a hydrocyclone package. The gold extraction is done by leaching process using cyanidation method through a series of stirred tanks. In this research, an optimization study of Aghdarreh plant grinding circuit ...

More

COMMINUTION DISINTEGRATION

2015-4-24  an existing SABC (SAG mill with recycle crushing and a single stage ball mill). First, a pre-crush stage using HPGR was introduced to minimise the generation of critical size material in the primary mill. The aim was to reduce a portion of the feed material below critical size and generate more fines to decrease the load in the primary mill.

More

GRINDING: Outotec builds world's largest SAG mill ...

The huge mill will offer increased efficiency, effective grinding conditions, 15% greater mill capacity, and reduced energy consumption. The mill will be operated as a single stage SAG mill (primary and secondary duty combined) with very high throughput made possible by the use of Outotec’s patented Turbo Pulp Lifter (TPL™) technology.

More

Improving Autogenous/Semi-Autogenous Grinding

2016-3-9  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 1.30 and three o’clock positions.

More

Major Mines Projects Young-Davidson Mine

The SAG mill feed conveyor is fitted with a belt scale, providing plant feed tonnage control through the variable speed capability of the apron feeders. Grinding Circuit The grinding circuit is in a single-stage SAG mill configuration. One of the Kemess ball mills was modified to function as the SAG mill in the Young-Davidson grinding circuit.

More

ONLINE SAG MILL PULSE MEASUREMENT AND

2012-6-18  ONLINE SAG MILL PULSE MEASUREMENT AND OPTIMIZATION SEMI­ ... force value upon a single impact within 100 microseconds. Since the impacts on the load ... stage of comminution in which the particles are reduced in size by a combination of impact and abrasion, either dry or in slurry with water. It is performed in rotating

More

Message