### EXPLORING THE EFFECT OF ENERGY RECOVERY POTENTIAL ON

other 99%? The focus of this paper is to explore the impact of the other 99% of the energy input into a given mill on comminution efficiency Specifically using mill and comminution circuit temperature data from the Raglan Mine SAG and ball mills this paper will first revisit a thermodynamic model of Get price

### Achievement of High Energy Efficiency in Grinding Mills at

ACHIEVEMENT OF HIGH ENERGY EFFICIENCY IN GRINDING MILLS AT SANTA RITA *S Latchireddi1 and E Faria2 1OUTOTEC (USA) and efforts to improve the energy efficiency of these mills is an on-going area The magnitude of benefits that can be achieved with efficient material transport in AG/SAG mills has been Get price

### What's the difference of Ball mill SAG mill AG mill?

Attrition mill is a type of grinding mill by kinds of media to crush lump to powder-like substances The impact can be rock on rock such as in an Autogenous Grinding (AG) mill rock and a small ball charge (~10%) used in Semi Autogenous Grinding (SAG) mills balls of various sizes in Ball Mills and less commonly these days steel rods in Rod Get price

### 1

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 This paper uses a 1-way coupled DEM-SPH method in three dimensions to analyse the full slurry flow for a 1 8 m diameter by 0 6 m long Get price

### Energy efficiency with steel Verband der Saarhtten and

The supporter of the network with a term of 3 years is Saarland's iron and steelworks association Verband der Saarhtten (VDS) In addition to Saarland's two major steel companies – AG der Dillinger Httenwerke (Dillinger) and Saarstahl AG – participants in the ESTA energy efficiency network also include Saarschmiede Get price

### USING THE SMC TEST TO PREDICT COMMINUTION CIRCUIT PERFORMANCE

USING THE SMC TEST TO PREDICT COMMINUTION CIRCUIT PERFORMANCE INTRODUCTION As the SMC Test produces the JK parameter values A and b as well as estimates the JK parameter ta and crusher model energy matrices the SMC Test can be used to conduct AG/SAG mill and crusher circuit simulations through the use of JKSimMet Independent Get price

### Optimization of mill performance by using

effect of slurry rheology and flow rate on mill behaviour He had already highlighted the interaction between slurry and media in the mill by looking at the mill grinding efficiency At that time it was difficult to acquire a lot of valuable information as robustness in an aggressive environment was not assured Get price

### SAG Mill Grinding Circuit Design

SAG is an acronym for semi-autogenous grinding SAG mills are autogenous mills that also use grinding balls like a ball mill A SAG mill is usually a primary or first stage grinder SAG mills use a ball charge of 8 to 21% The largest SAG mill is 42' (12 8m) in diameter powered by a 28 MW (38 000 HP) motor Get price

### mill sag mechanical failure

SAG Mill Control SAG mills can be optimized for maximum ore throughput or maximum grinding energy efficiency In both cases precise control of the mill filling percentage is critical (Wills and Napier-Munn 2006) Maintaining constant mill weight as indicated by bearing pressure is one approach to stabilize the mill Get price

### Selection of Comminution Circuits for Improved Efficiency

grinding to single stage crushing and semi-autogenous grinding (SAG) and ball mill (SAB) circuits This progression has not necessarily been accompanied by an improvement in the efficiency of power utilisation in achieving the target grind size but has seen an improvement in the overall efficiency of mineral processing as Get price

### DESIGN OF AG/SAG MILL CIRCUITS USING THE SMC TEST

Such a data reduction technique can be found in Equations 1 2 and 3 These equations are used by SMCC Pty Ltd to estimate the specific energy of AG/SAG mills under all normal operating conditions eg ball load mill speed feed size and ore hardness and for all normal aspect ratios and mill Get price

### Optimising Western Australia Magnetite Circuit Design

this test with the P80 size in microns plotted against the specific energy (kWh/t) is shown in Fig 6 Fig 6 Levin test for the ball mill The Levin test for fine ball mill product predicts a net specific energy requirement of 52 5 kWh/t to grind from an F80 of ~400 m (AG mill/magnetic separator product) to Get price

### SAG Mill

Dark Steel Balls or Flint can be put in the processing slot (right side of the GUI left of the process bar) to increase the efficiency and speed of the SAG Mill Putting a Double-Layered Capacitor or Octadic Capacitor into the upgrade slot (in the bottom-left corner of the GUI) will increase the energy storage and speed of the machine " " Get price

### Modelling comminution patterns within a pilot scale

The patterns of rock comminution within tumbling mills as well as the nature of forces are of significant practical importance Discrete element modelling (DEM) has been used to analyse the pattern of specific energy applied to rock in Modelling comminution patterns within a pilot scale AG/SAG mill Minerals Engineering 2006 Paul Cleary Get price

### BrainWave Control solutions for SAG mills

SAG mill Feed rate Weight BrainWave BrainWave SAG mill control schematic Benefits Automatically account for changes in variation of par-ticle size or ore hardness Minimize production disturbances Maintain optimal production by minimizing changes to mill speed Maximize production rate while providing consistent grinding Maximize energy efficiency Get price

### SAG Mill Efficiency Energy efficiency of Tumbling Mills

The energy efficiency of tumbling mills can be examined directly by looking at the motion of ore and grinding balls inside the mill The makeup of the charge and the lifter bars attached to the inside of the mill shell can be designed particularly to maximize the mass of ore fractured per unit of energy spent Get price

### advantage of sag mill

SAG/AG SCU SAG/AG SCU SAG/AG Sentinel Camera Unit (SCU) Concept of System The SCU uses the latest technology in high definition imagery within a custom designed housing permanently affixed to the feed chute to provide a live audio and temperature feed in a running SAG mill and video feed from inside a stationary SAG mill Get price

### Improving energy efficiency in comminution

1-10-2018Energy-efficiency is one of the pillars of comminution circuit design and ignoring this can be the difference between a profitable operation and a money loser Mines rarely have control over the cost of energy In this case an AG or SAG mill may be appropriate Get price

### Sag Mill And A Closed Circuit Ball Mill

Metallurgical ContentOpen Circuit GrindingClosed Circuit GrindingGrinding Circuit Process Control VariablesGrinding Operating Costs The simplest grinding circuit consists of a ball or rod mill in closed circuit with a classifier the flow sheet is shown in Fig 25 and the actual layout in Fig 9 This single-stage circuit is chiefly employed Get price

### Modelling Comminution Patterns Within A Pilot Scale

The patterns of rock comminution within tumbling mills as well as the nature of forces are of significant practical importance Discrete element modelling (DEM) has been used to analyse the pattern of specific energy applied to rock in terms of spatial distribution within a pilot AG/SAG mill We also analysed in some detail the nature [] Get price

### Bibliography Specific energy consumption models

Bibliography Specific Energy Consumption Models Specific Energy Consumption is the most common way of describing how much energy is used by grinding and is the basis of the throughput estimations in SAGMILLING COM It is usually expressed as kWh/t (kilowatt-hours per tonne) Get price

### IMPROVING ENERGY EFFICIENCY VIA OPTIMIZED

Depending on the mill size the SAG mills draws between 2 MW and 17 MW The product from the SAG mill is further reduced in size using pebble crushers and ball mills Hence typical gold or copper ore requires between 2 0 and 7 5 kWh per ton of energy to reduce the particle size Get price

### MacPherson Autogenous Grindability Test

The mill power draw throughput and product size distribution are used to compute a specific energy input and the MacPherson autogenous work index (AWI) Although the importance to achieve steady-state in a grinding test is widely accepted (Bond tests) the MacPherson test remains the only small-scale AG/SAG mill test that offers this option Get price

### Semi Autogenous Autogenous Grinding Mills Sag Mills

Semi Autogenous and Autogenous Grinding Mills Market is driven by need for energy efficient solutions as grinding consumes more energy Semi Autogenous and Autogenous Grinding Mills are used for grinding large chunks of materials into small pieces which can be used for processing | SAG Mills Market Get price

### lifter for sag mill

lifter for sag mill Slurry flow in mills with TCPL ? An efficient pulp lifter for ag/sag mills- lifter for sag mill Extensive test work carried out on slurry removal mechanism in grate discharge mills (ag/sag) has shown that the conventional pulp lifters (radial and curved) have inherent drawbacks They allow short-circuiting of the slurry from Get price

### Course Grade Sag Mill

Jun 10 2015 FreeportMcMoRan invested billion to upgrade the Metcalf mill at the Ironically at a time when most copper mines are seeing ore grades and of 225 million lb/y of copper over the course of the mine's 30year life It's in the neighborhood of 40% to 50% more energy efficient than a SAG Get price

### Are SAG Mills Losing Market Confidence?

Autogenous (AG) and semi-autogenous (SAG) grinding mills are considered a mature technology so why are we seeing a number of recent projects not achieving nameplate capacity and is SAG technology losing market confidence particularly in financial circles? Get price

### Difference Between A Sag Mill And Ball Mill

Difference Between Sag Mill vs Ball Mill mech4study Oct 12 2017 Today we will learn about difference between sag mill vs ball mill A mill is a machine by which solid or hard materials are broken into smaller pieces by means of grinding crushing or cutting Get price

### ACHIEVEMENT OF HIGH ENERGY EFFICIENCY IN GRINDING MILLS

ACHIEVEMENT OF HIGH ENERGY EFFICIENCY IN GRINDING MILLS AT SANTA RITA *S latchireddi 1 and E Faria2 1OUTOTEC magnitude of benefits that can be achieved with efficient material transport in AG/SAG mills has been The energy efficiency of a comminution device typically depends on how good the energy is used Get price

### Overgrinding In Sag Mills

Overgrinding in sag mills technology selection of stirred mills for energy efficiency in agsag mills can accept feed up to 350mm and used as primary Chat now energy efficiency of sag mill blueberrypastriin Analysis of energyefficiency opportunities energy efficiency in ag and sag mills regarding their cement production energy Get Price Get price