# calculate sag ball mill circulating load

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In such circumstances the circulating load would be increased Simulation 4 included changes adopted in Simulation 3 along with a reducing the SAG mill ball diameter from 5 to 4 b reducing the ball mill ball diameter from 2.5 to 2 and c increasing the ball charge in the ball mills from 27.5 to 30 .

Get Price### PDF Circulating load calculation in grinding circuits

Circulating load calculation in grinding circuits 1 I ntroduction The mass ba lances in m ineral proc essing circ uits are based on t he equation of mass conservation given by F = C T 1

Get Price### Circulating Load Calculation Formula

2015 2 21 For example your ball mill is in closed circuit with a set of cyclones The grinding mill receives crushed ore feed The pulp densities around your cyclone are sampled and known over an 8 hour shift allowing to calculate corresponding to circulating load ratios and circulating load

Get Price### Circulating load

2014 11 18 Slide 2 Content Introduction Circulating load calculate Most factories the purpose of control Effective factors for circulating load Test design Conclusion References 3 Slide 3 circulating load ratio As the ratio of the amount of solids going through the ball mill divided by the amount of solids going through the circuit.

Get Price### Basic Cyclone Design

2015 3 7 W = dust load grains/acf Fractional efficiencies collection efficiency various particle sizes fractional or size efficiency curve may be graphical or tabular Example Size Efficiency Curve Particle Diameter microns collection B.W 1 5 3 74 5 92 10 98.74 30 99.4 50 99.8 100 99.99.

Get Price### GRAVITY RECOVERY OF GOLD FROM WITHIN GRINDING

2019 10 1 GRG in the ball mil 70 feed GRG and 250 circulating load and BCC stage recovery of 40 No upgrading of the primary gravity concentration is considered in this analysis 0 10 20 30 40 50 60 70 80 0 10 20 30 40 50 60 70 Fraction of Cyclone Feed Treated by Gravity Circuit Cyc Eff 97 Cyc Eff 99 Feed GRG Value 70 Gravity Circuit Mill

Get Price### Use of Radioactive Tracers to Support Mass Balances in

2017 4 27 The SAG line 1 presented a balanced distribution 50 50 for the ball mills BM 4 and BM 5 during the surveys SAG line 2 showed an unbalanced condition where the feed flowrate to the BM 6 circuit was higher than the flowrate to the BM 7 The load distribution was attributed to different control strategies in each cyclone circuit.

Get Price### A New Approach to the Calculation of Work Index and

2013 12 24 culating load is then dried 105˚C returned to the mill and a mass of the feed sample equal to the under size of the screen is also added keeping the mill load constant Using the previous grinding rate one sets the new time such as to achieve a ratio k = 2 of circulating load to new feed The same process is repeated until the results of

Get Price### PROCESS DIAGNOSTIC STUDIES FOR CEMENT MILL

2013 3 13 4 MILL LOAD CONTROL LATEST CONCEPT FOR CEMENT MILL OPTIMISATION 4.1 Concept M/s Holderbank Engineering Canada has developed a control strategy for ball mills which can maintain a mill production near optimum with little operator intervention The main principle of the concept is that maximum

Get Price### the effect of circulating load on sag mill power

SAG mill circuit optimisation at Ernest Henry Mining 64m x 81m ball mill has 55MW of installed power An optimisation investigation of the effect of run of mine fragmentation in SAG mill throughput and the ball mill circulating load to produce a coarse product would be difficulty due to the.

Get Price### Optimization and Performance of Grinding Circuits The

the primary crusher performance and proper control of the ratios for the SAG mill feeders drawing the ore from the stockpile The ball mill grinding efficiency was poor and could be indicated by the fraction < 125 µm of only 5 9 or x P 80 >400 µm in the mill discharge This was deemed due

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was convinced that a SAG version of the Bond ball mill work index test was needed if the industry was to improve upon current practice John to simulate a 250 circulating load and once the test has come to equilibrium the raw data are are used to back calculate a breakage rate

Get Price### Ball Mill Circulating Load

2015 10 9 Calculating a grinding circuit s circulating loads based on Screen Analysis of its slurries Compared to Solids or Density based Circulating load equations a more precise method of determining grinding circuit tonnages uses the screen size distributions of the pulps instead of the dilution ratios.Pulp samples collected around the ball mill or rod mill

Get Price### What is the major role of water in Primary Ball Mill or

Therefore over the years closed ball mill cyclone circuits have become an industry standard Although mill capacity increases with circulating load an optimum circulating load of 250 was

Get Price### calculation of re circulating load in ball mill circuit

2012 12 31 Milling Circuit SAG Mill Ball Mill Cyclone Feed U/F O/F Mill Sump Cluster Linear Screen Circulating load 238 550 369 526 Imperfection 0.18 0.21 0.25 0.22 150 mm More detailed

Get Price### Small Scale Tests to Characterise Ore Grindibility

a 100 circulating load The test can also be closed with various sieve sizes but for AG/SAG mill analyses the standard 14 mesh 1.18mm sieve is typically used The rod mill work index is computed with an equation very similar to that of the ball mill test as follows It is common to observe a difference between the rod mill and ball mill values

Get Price### Testing method for ball mills

The Bond ball mill test is designed to predict power in wet ball mill grinding circuit operating at a 250 circulating load However moving away from this condition reduces the accuracy of the test Further the Bond ball mill test does not predict the behavior of large rocks in a grinding circuit where the mode of breakage is impact dominated.

Get Price### Optimal mill loading with LoadIQ

Optimal mill loading ensures you are making the most efficient use of your grinding mill but in the past it has been difficult to calculate the optimal mill load with precision Not anymore LoadIQ utilises our mill scanner smart sensor technology to determine the optimum mill load increasing throughput by 3

Get Price### The influence of mill speed and pulp density on the

2009 8 26 The pilot mill is also equipped with a sensor measuring the ball and pulp toe and shoulder angles see Figure 3 These data are then used to calculate the total pulp and ball charge angle see Graph 5 Graph 5 clearly illustrates how the ball charge stays quite compact till about 73 solids as the total media angle does not change.

Get Price### PDF Determine the breakage function and Selection

In modeling grinding mills three basic phenomena including mass transfer breakage function and Selection function need to be described Different methods for determining the breakage function

Get Price### Basic Cyclone Design

2015 3 7 W = dust load grains/acf Fractional efficiencies collection efficiency various particle sizes fractional or size efficiency curve may be graphical or tabular Example Size Efficiency Curve Particle Diameter microns collection B.W 1 5 3 74 5 92 10 98.74 30 99.4 50 99.8 100 99.99.

Get Price### An improved method for grinding mill filling measurement

Calculate load mass from mill crash stop and grind out filling measurements new method offers engineers and researchers a safer and faster method for quantifying the filling level in industrial SAG and ball mills and allows the surface profile to be surveyed without requiring the contents to be level

Get Price### SAGDesign Test

The SAG mill pinion energy W SDT kWh/t and SAG discharge Bond ball mill work index S d BWI kWh/t are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.

Get Price### Model Morrell SS SAG

2020 3 22 This is a SAG or AG mill model that estimates the specific energy consumption E SAG using the equations of Morrell 2004 Testwork Required The SMC test stored in the DWT testwork table SMC is a Drop Weight Test Bond ball mill work index The method requires all the parameters of the ball mill work index test to be filled in Ball

Get Price### ERSEL Ağır Makine San

2019 9 10 ERSEL Ağır Makine San ve Tic A.Ş Toggle navigation Semi autogenous SAG grinding is a grinding process carried out with small amount of ball charge 4 15 unlike ball mills and with the help of bigger parts crumbling the smaller parts of ore To achieve this type of grinding SAG mills with large diameter and short length have been

Get Price### A Method to Determine the Ball Filling in Miduk Copper

2 days ago After SAG mill a trommel screen produces two over and under size materials which the oversize part is circulated into SAG mill and undersize reports to hydrocyclone for further process Ball filling identify was implemented in this work using mill`s load sampling and ball abrasion test.

Get Price### AMIT 135 Lesson 6 Grinding Circuit Mining Mill

The mill product can either be finished size ready for processing or an intermediate size ready for final grinding in a rod mill ball mill or pebble mill AG/SAG mills can accomplish the same size reduction work as two or three stages of crushing and screening a rod mill and some or all of the work of a ball mill.

Get Price### The influence of mill speed and pulp density on the

2009 8 26 The pilot mill is also equipped with a sensor measuring the ball and pulp toe and shoulder angles see Figure 3 These data are then used to calculate the total pulp and ball charge angle see Graph 5 Graph 5 clearly illustrates how the ball charge stays quite compact till about 73 solids as the total media angle does not change.

Get Price### Mill power draw models

2020 3 22 Mill Power Draw Models The mill power draw models are used to predict how much power will be consumed by a particular type of mill mill geometry and set of mill operating conditions This power is transferred to the ore and used to predict the throughput when combined with the specific energy consumption models.

Get Price### circulating load ratio ball mill

circulating load formula in ball millhsbcgraduates Circulating load calculation formulahere is a formula that allows you to calculate the circulating load ratio around a ball mill and hydrocylone as part of a grinding circuit for example your ball mill is in closed circuit with a set of cyclones circulatiball mill circulating load pdf in india.

Get Price### SAGDesign Test

The SAG mill pinion energy W SDT kWh/t and SAG discharge Bond ball mill work index S d BWI kWh/t are then used to calculate the total energy to grind the ore from 80 passing 152 mm to 80 passing the client specified final product size P 80.This information along with the ore specific gravity is used to calculate necessary mill sizes and motor power in industrial applications.

Get Price### calculation of re circulating load in ball mill circuit

2012 12 31 Milling Circuit SAG Mill Ball Mill Cyclone Feed U/F O/F Mill Sump Cluster Linear Screen Circulating load 238 550 369 526 Imperfection 0.18 0.21 0.25 0.22 150 mm More detailed

Get Price### A Method to Determine the Ball Filling in Miduk Copper

2 days ago After SAG mill a trommel screen produces two over and under size materials which the oversize part is circulated into SAG mill and undersize reports to hydrocyclone for further process Ball filling identify was implemented in this work using mill`s load sampling and ball abrasion test.

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