Controlling fragmentation

Controlling fragmentation

SAG mills is less than 5 . To give some context an example metal mine might spend 5.00/t of ore on electricity an equivalent amount on grinding media in the SAG circuit alone but only 0.30/t of broken ore on explosives at the drill and blast stage. Yet the blasting process is a much more energy efficient method of fragmenting rock.

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Shovel-based Fragmentation Analysis of ROM to Improve

Shovel-based Fragmentation Analysis of ROM to Improve

• North Mill Ore South Mill Ore • 18 -24 stemming • Goal is generate fines to maximize throughput and for the SAG mill to generate coarse oversize in the stem zone for "grinding media." • Different philosophyusually to enhance throughput is maximize fragmentation.

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Maximising SAG mill throughput at Porgera gold mine by

Maximising SAG mill throughput at Porgera gold mine by

Request PDF On Sep 1 2001 M. Lam and others published Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation Find read and

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Blast optimisation of hard ores in the Phu Kham open-pit

Blast optimisation of hard ores in the Phu Kham open-pit

- identify most cost effective way to improve mill throughput of harder ores • Value for money criteria is a cost/benefit analysis that weighed-up the additional operating cost to implement the trial against the improvement in SAG mill tph • Each trial single-sourced through mill for 46 hour and mill

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The Effects of Blasting on Crushing and Grinding

The Effects of Blasting on Crushing and Grinding

size. Therefore one must analyze blasting broadly to obtain satisfactory results throughout the operation. This paper examines the role blasting plays in optimum crushing and grinding with the emphasis on energy reduction. The role of different blasting energy input on fragmentation is studied and related to needs at the plant.

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Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336268 Lakeshore Rd. E. Oakville Ontario L6J 7S4

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(PDF) Blast fragmentation for maximizing the SAG mill

(PDF) Blast fragmentation for maximizing the SAG mill

Blast fragmentation for maximizing the SAG mill throughput at Porgera Goldmine

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How to use Blast Design to Increase SAG Mill Tonnage

How to use Blast Design to Increase SAG Mill Tonnage

SAG mill throughput is often a bottleneck in increasing metal productivity. Improved size distribution control in the mill feed can be used to increase mill production. This can be accomplished by controlling blast fragmentation as a function of energy input and rock characteristics. Such an approach requires the integration of rock fragmentation and comminution modeling. The optimal mill feed

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(PDF) Maximising SAG mill throughput at Porgera gold mine

(PDF) Maximising SAG mill throughput at Porgera gold mine

Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation

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Fragmentation (weaponry)Wikipedia

Fragmentation (weaponry)Wikipedia

Fragmentation is the process by which the casing of a projectile from a bomb barrel bomb land mine IED artillery mortar tank gun or autocannon shell rocket missile grenade etc. is shattered by the detonation of the explosive filler.. The correct term for these pieces is "fragmentation" (sometimes shortened to frag) "shards" or "splinters" can be used for non-preformed fragments.

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Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill to Achieve Design Performance

Choosing a SAG Mill To Achieve Design Performance John Starkey1 Principal Consulting Engineer Sami Hindstrom2 Manager Grinding Travis Orser2 Project Manager Grinding 1 Starkey Associates Grinding Design and Process Engineering 336268 Lakeshore Rd. E. Oakville Ontario L6J 7S4

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Investigation of Crushed Aggregate as Stemming Material in

Investigation of Crushed Aggregate as Stemming Material in

Jul 12 2015 · The present paper summarizes the application of two different types of stemming material used in bench blasting. The two stemming material types namely crushed aggregate and drill cuttings were opted in the present study. The blast trials were conducted on overburden rocks of Garnet Biotite Sillimanite Gneiss (GBSG) formations in one of the largest metalliferous mines of India. These rocks

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Throughput Forecasting and Optimisation at the Phu Kham

Throughput Forecasting and Optimisation at the Phu Kham

strategies to maximise mill throughput to maintain LOM operational targets even when treating harder ores. This can be achieved by improving ROM fragmentation through optimisation of blasting practices. A reliable model of blast fragmentation is required to determine the effect of changing blast parameters on ROM fragmentation.

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Maximising SAG mill throughput at Porgera gold mine CORE

Maximising SAG mill throughput at Porgera gold mine CORE

Maximising SAG mill throughput at Porgera gold mine by optimising blast fragmentation By M. Lam A. Jankovic W. Valery and S. Kanchibotla Topics EX

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SoloWipWareFragmentation Analysis Software and

SoloWipWareFragmentation Analysis Software and

Improve SAG throughput evaluate crusher performance detect broken screens and discover contamination. Read how one WipWare client used Solo particle size data to provide feedback on blast fragmentation as well as optimize mill throughput by manipulation of stockpile feeders.

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SAG Mill Grinding Circuit Design

SAG Mill Grinding Circuit Design

Metallurgical ContentBall Charge Motion inside a SAG MillSAG Mill OperationSemi Autogenous Design FactorsSAG Mill Operation ExampleProcess Plant DescriptionSAG Mill Design and Specification Operating Problems Since CommissioningDesign Changes and Future Operating Strategies AG and SAG mills are now the primary unit operation for the majority of large grinding circuits and form the

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Blast fragmentation measurements in open pitsAMC

Blast fragmentation measurements in open pitsAMC

AMC Consultants was recently involved in a project that required amongst other activities a review of options to measure blast fragmentation in an operating open pit mining environment. Blast fragmentation measurement is usually depicted as a particle size distribution (PSD) curve relationship of percentage of rock passing verses rock size as shown below.

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Downstream Effects of Cave Fragmentation SRK Consulting

Downstream Effects of Cave Fragmentation SRK Consulting

Since the 1990s mine-to-mill studies have evaluated the impact of blast fragmentation on downstream plant throughput. This was because crushing and grinding circuits (in particular SAG mills) are sensitive to feed size and the amount of fines generated from blasting. Significant gains in grinding circuit efficiency could be achieved by controlling and optimising blast fragmentation.

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PhotoanalysisWikipedia

PhotoanalysisWikipedia

Photoanalysis is being used on SAG mills worldwide to control the size of rock being crushed. Companies are using this technology to determine the size of particles being processed in the SAG Mill. Having oversize material entering the SAG mill makes an operation less efficient costing companies money in electrical and maintenance costs.

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Esen Mining Consulting About

Esen Mining Consulting About

Sedat was part of the consulting team and they did a comprehensive drill blast audit plant survey as well as simulated the entire operations using their models. The result was remarkable approximately 15 SAG mill throughput increase. He is a great consultant who understands our needs focusses on the results and delivers on-time.

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MODELLING FINES IN BLAST FRAGMENTATION AND ITS

MODELLING FINES IN BLAST FRAGMENTATION AND ITS

MODELLING FINES IN BLAST FRAGMENTATION AND ITS IMPACT ON CRUSHING AND GRINDING Sarma S Kanchibotla Walter Valery and Steve Morrell Julius Kruttschnitt Mineral Research Centre The University of Queensland INTRODUCTION In the mining industry blasts are usually designed to fracture the in-situ rock mass and prepare

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Increased production and energy efficiency for optimized

Increased production and energy efficiency for optimized

Apr 24 2014 · Increased production and energy efficiency for optimized Antamina mine. has assisted Compañía Minera Antamina to increase its mill throughput by integrating and optimizing blast fragmentation crushing and grinding operations.

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Blast fragmentation for maximizing the SAG mill throughput

Blast fragmentation for maximizing the SAG mill throughput

The work done so far clearly indicates that significant improvements in sag mill throughput can be achieved by optimizing the blast fragmentation. This paper discusses the planning implementation

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The Effects of Blasting on Crushing and Grinding

The Effects of Blasting on Crushing and Grinding

size. Therefore one must analyze blasting broadly to obtain satisfactory results throughout the operation. This paper examines the role blasting plays in optimum crushing and grinding with the emphasis on energy reduction. The role of different blasting energy input on fragmentation is studied and related to needs at the plant.

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MODELLING FINES IN BLAST FRAGMENTATION AND ITS

MODELLING FINES IN BLAST FRAGMENTATION AND ITS

MODELLING FINES IN BLAST FRAGMENTATION AND ITS IMPACT ON CRUSHING AND GRINDING Sarma S Kanchibotla Walter Valery and Steve Morrell Julius Kruttschnitt Mineral Research Centre The University of Queensland INTRODUCTION In the mining industry blasts are usually designed to fracture the in-situ rock mass and prepare

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Shovel-based Fragmentation Analysis of ROM to Improve

Shovel-based Fragmentation Analysis of ROM to Improve

• North Mill Ore South Mill Ore • 18 -24 stemming • Goal is generate fines to maximize throughput and for the SAG mill to generate coarse oversize in the stem zone for "grinding media." • Different philosophyusually to enhance throughput is maximize fragmentation.

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Downstream Effects of Cave Fragmentation SRK Consulting

Downstream Effects of Cave Fragmentation SRK Consulting

Since the 1990s mine-to-mill studies have evaluated the impact of blast fragmentation on downstream plant throughput. This was because crushing and grinding circuits (in particular SAG mills) are sensitive to feed size and the amount of fines generated from blasting. Significant gains in grinding circuit efficiency could be achieved by controlling and optimising blast fragmentation.

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WipFrag System IIOnline Fragmentation Analysis

WipFrag System IIOnline Fragmentation Analysis

good fragmentation and considerable reduction of oversize12. 3.3 Highland Valley Copper Logan Lake B. C. Canada grinding mill performance Highland Valley Copper is using on-line monitoring of ore size and combining it with ore hardness tracking to predict SAG (Semi-autogenous grinding) mill performance10. Figure 6 shows a typical image

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Online Fragmentation Analysis Achievements in the Mining

Online Fragmentation Analysis Achievements in the Mining

Online Fragmentation Analysis Achievements in the Mining Industry N. H. Maerz Rock Mechanics and Explosives Research Center University of Missouri-Rolla MO USA Abstract Size analysis of fragmentation based on optical imaging systems such as WipFrag has been available for some time now. Studies and industry experience has shown that the

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Downstream Effects Of Cave FragmentationCave Mining Forum

Downstream Effects Of Cave FragmentationCave Mining Forum

Since the 1990s mine-to-mill studies have evaluated the impact of blast fragmentation on downstream plant throughput. This was because crushing and grinding circuits (in particular SAG mills) are sensitive to feed size and the amount of fines generated from blasting. Significant gains in grinding circuit efficiency could be achieved by controlling and optimising blast fragmentation.

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MINING OPTIMIZATIONWordPress

MINING OPTIMIZATIONWordPress

Blast fragmentation for maximising the sag mill throughput at Porgera Gold Mine. Proceedings of the Twenty-Seventh Annual Conference on Explosives and Blasting Technique 1(1 ) 383-399. • Park J. Compan G. Kim k.

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BATU HIJAU MILL THROUGHPUT OPTIMIZATION MILLING

BATU HIJAU MILL THROUGHPUT OPTIMIZATION MILLING

mill configuration setup in order to maximize the milling rate. The mill circuit configuration inthis case only includes SAG Mill Discharge Grates SAG Trommel Screen and Pebble Screen aperturesizes . It also discusses the strategy used to mitigate throughput reductions post mill relines.

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Determination of specific charge minimizing total unit

Determination of specific charge minimizing total unit

Oct 17 2014 · The value of specific charge in open pit quarry blasting processes considerably affects the efficiency of the blasting. When a high value of specific charge is used in a blasting process the material resulting from the blasting will have a finer dimension. Costs of explosives and drilling will be increased due to high specific charge value however costs of subsequent processes such as

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PIT-TO-PLANT OPTIMISATION AT MORILA GOLD MINE

PIT-TO-PLANT OPTIMISATION AT MORILA GOLD MINE

facility with primary crushing SAG and ball milling including a recycle pebble crusher. The principal objective of the p2p programme is to increase mill throughput primarily through increased blast fragmentation but it must be stressed that this must not be at the expense of grade control thus it is

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Influence of blasting on the size distribution and

Influence of blasting on the size distribution and

– an improved or at least maintained fragmentation with a lower explosives consumption. The focus in this review is on the energy expenditure and the influence of blasting on the size distribution and properties of muckpile fragments. Grinding is by far the most energy intensive stage of

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11th International Symposium on Rock Fragmentation by

11th International Symposium on Rock Fragmentation by

Fragmentation from fresh primary hard ores was also expected to be much coarser than the soft oxide or es. The feasibility design throughput of the mill with hard primary ores was assumed to be around 400 tph compared to 700 tph with oxide ore. Figure 1 below is a snapshot of throughput changes in the SAG mill while feeding the fresh hard ore.

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