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effect of grate discharge area of sag mill

effect of grate discharge area of sag mill

effect of grate discharge area of sag mill Grate Pulp Lifter Interaction in SAG/AG Mills AusIMM It is based on: an appreciation of the process interaction between grates and pulp lifters, an interpretation of mill charge structure as it relates to discharge through grates, and an

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Improved Relationships for Discharge in SAG/AG Mills

2019-10-9  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

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The effect of grate design on the behaviour of grate ...

1986-9-1  He found that only pulp velocity was significant. However, the effect of percent solids in a grate-discharge pilot mill has been dramatically demon- strated by Horst and Freeh (1972) who showed that a change in percent solids from 55% to 74% resulted in an increase in hold-up of 750%.

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Overflow VS Grate Discharge Ball or Mill - Why Retrofit

2015-6-24  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.

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Overflow Versus Grate Discharge Ball Mills: An ...

2021-7-14  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.

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

reduction in the grate open area fraction from 0.124 to 0.091.When considering the discharge functions for the new designs (Surveys 3, 4 and 5) it can be seen that th ere is little difference ...

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SAG Mill Liner Design - Mineral Processing Metallurgy

2016-6-6  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.

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SAG MILL DISCHARGE SCREENS-TROMMEL vs.

2013-12-22  SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING ... screen area, for roughly 30,000 tons a day or 1,300 tons an hour. These trommels were the first of their size for the tonnage handled. Hibbtac trommels handle about 400 tons ... currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had

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The effect of grate design on the behaviour of grate ...

Abstract A model for the effect of flowrate and viscosity of slurry on the hold-up of slurry in a grate-discharge grinding mill has been developed. Given detailed specifications of the grate design (such as the area in the grate within which the holes are situated, the number of holes per m 2 and the hole size) and the flowrate and viscosity of the slurry flowing through the mill, the model ...

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

2009-8-26  have any effect and does not result in a finer grind. The particles size distribution slope is not affected by the mill speed (see Graph 2) as the curves are mostly overlapping. Density 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

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effect of grate discharge area of sag mill

effect of grate discharge area of sag mill Grate Pulp Lifter Interaction in SAG/AG Mills AusIMM It is based on: an appreciation of the process interaction between grates and pulp lifters, an interpretation of mill charge structure as it relates to discharge through grates, and an

Read More
Improved relationships for discharge in SAG/AG mills

2021-6-9  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 literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions.

Read More
SLURRY FLOW IN MILLS : GRATE-ONLY DISCHARGE

(AG), semi-autogenous (SAG) and grate discharge ball mills. The flow capacity (grinding capacity) of these mills is strongly influenced by the discharge grate design - open area and position of apertures, as well as the performance of the pulp lifters. As mill sizes have progressively increased and closed-circuiting has become more popular

Read More
The effect of grate design on the behaviour of grate ...

Abstract A model for the effect of flowrate and viscosity of slurry on the hold-up of slurry in a grate-discharge grinding mill has been developed. Given detailed specifications of the grate design (such as the area in the grate within which the holes are situated, the number of holes per m 2 and the hole size) and the flowrate and viscosity of the slurry flowing through the mill, the model ...

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sag mill grate designsag mill grate slot size

influence and performance of grate/pulp lifter design in AG/SAG mill .size distribution and its effect on discharge through the grate at various . .lifter study at the Cortez Gold Mines SAG mill Shell and pulp lifter study at the Cortez Gold Mines SAG mill on ResearchGate, the professional network for scientists.

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SAG MILL DISCHARGE SCREENS-TROMMEL vs.

2013-12-22  SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING ... screen area, for roughly 30,000 tons a day or 1,300 tons an hour. These trommels were the first of their size for the tonnage handled. Hibbtac trommels handle about 400 tons ... currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had

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(PDF) Slurry pooling and transport issues in SAG mills

The slurry transport from the AG/SAG mill through grate holes into the discharge trunnion is the main function of the pulp lifter. This process develops complex flow behaviour in the region of the ...

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(PDF) Optimisation of the Sossego SAG mill Mauricio ...

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.

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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.

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

2009-8-26  have any effect and does not result in a finer grind. The particles size distribution slope is not affected by the mill speed (see Graph 2) as the curves are mostly overlapping. Density 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 ...

Read More
Improved relationships for discharge in SAG/AG mills

2021-6-9  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 literature lacks knowledge of mill content size distribution and its effect on discharge through the grate at various aperture sizes and radial positions.

Read More
SLURRY FLOW IN MILLS : GRATE-ONLY DISCHARGE

(AG), semi-autogenous (SAG) and grate discharge ball mills. The flow capacity (grinding capacity) of these mills is strongly influenced by the discharge grate design - open area and position of apertures, as well as the performance of the pulp lifters. As mill sizes have progressively increased and closed-circuiting has become more popular

Read More
sag mill grate designsag mill grate slot size

influence and performance of grate/pulp lifter design in AG/SAG mill .size distribution and its effect on discharge through the grate at various . .lifter study at the Cortez Gold Mines SAG mill Shell and pulp lifter study at the Cortez Gold Mines SAG mill on ResearchGate, the professional network for scientists.

Read More
SAG MILL DISCHARGE SCREENS-TROMMEL vs.

2013-12-22  SAG MILL DISCHARGE SCREENS-TROMMEL vs. VIBRATING ... screen area, for roughly 30,000 tons a day or 1,300 tons an hour. These trommels were the first of their size for the tonnage handled. Hibbtac trommels handle about 400 tons ... currently use a 1-inch grate in the mill that wears out to probably 1-1/4-inch. We’ve had

Read More
Overflow Versus Grate Discharge Ball Mills: An ...

2015-1-1  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 discharge flow mechanism. The experimental results are analyzed to study the influence of operating variables on specific energy, product size, hold-up and residence time distribution in ...

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1-way-coupled pilot SAG mill draft1

Submitted to Minerals Engineering 1/19 Prediction of 3D slurry flow within the grinding chamber and discharge from a pilot scale SAG mill Paul W. Cleary1 and Rob D. Morrison2 1CSIRO Mathematics, Informatics and Statistics, Private Bag 33, Clayton South, 3168, Australia.

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

2009-8-26  have any effect and does not result in a finer grind. The particles size distribution slope is not affected by the mill speed (see Graph 2) as the curves are mostly overlapping. Density 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 ...

Read More
Taking Control of the Mill Feed R2 - Orway Mineral

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 ...

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China SAG and AG Mill Grate Mill Liner factory and ...

SAG Semi-Autogenous Grinding Mill Liner and AG Autogenous Grinding Mill Liner from HG use Cr-Mo materials (AS2074 Standard), SAG Semi-Autogenous Grinding Mill Liner and AG Autogenous Grinding Mill Liner provides superior impact and wear resistance in all semi-autogenous milling applications.. To choose the right material for the right application is our mission , we are always working ...

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AN OVERVIEW OF SINGLE STAGE AUTOGENOUS AND

2014-10-1  3 SAG mill (8 – 15% ball charge) Variable competency ore 4 High ball charge SAG mill (15 to 25% ball charge) Incompetent ore 5 Low ball charge SAG mill, high mill speed. (4% ball charge, 90% Nc) A cross between AG and SAG for competent, abrasive ores. As typically operated in RSA. 6 SAG mill (configurations 3, and 5 ) with recycle crusher

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