### Cement Grinding OptimizationLinkedIn SlideShare

Jul 31 2014 · The following modified Bond equation was proposed for crushing (Magdalinovic 1990) Wc = cP A Wi ( cP 10cF 10 ) (8) where Wcis energy consumed for clinker crushing (kWh/t) Wiis Bond ball mill work index (kWh/t) Pc -is sieve size passing 80 of the clinker after crushing (µm) Fcis sieve size passing 80 of the clinker before

Chat Online### A new approach to Bond grindability and work index

W i =1.1 44.5 P i 0.23 G bg 0.82 10/ P 80 − 10/ F 80 W i is the work index (kwh/t) P i screen size at which the test is performed (106 μm) G bg Bond s standard ball mill grindability net weight of ball mill product passing sieve size P i produced per mill revolution (g/rev) P 80 sieve opening which 80 of the product passes (μm

Chat Online### Characteristics of Mae Moh lignite Hardgrove grindability

pulverized. However this index can not be used to size a pulverizer and mill power directly. Only the specific energy mill power over capacity is a main parameter for mill sizing. Specifically the Bond work index is suitable for utilization in many industrial grinding processes (Rhodes 1998). Corresponding author.

Chat Online### calculate circulating load ball mill

The Effect of Circulating Load and Test Sieve Size on The Bond In this study the effect of circulating load (CL) and test sieve size (P ) which are inaccuracies of Bond grindability on the Bond ball mill grindability (Ghg) and work index (W ) are to determine Bond work index (Berry Bruce 1966 .

Chat Online### Design Of Ball MillCrusher Grinding Mills Crushing

The basic parameters used in ball mill design (power calculations) rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum chunk size product size as P80 and .

Chat Online### about smc test rev 1

DWi and point load index (IS50) making it valuable in Mine-to-mill studies as well. For power-based calculations the SMC Test® also provides the comminution indices Mia Mih and Mic which are routinely reported when a test is carried out (see Table 1 below). In conjunction with the Bond ball mill work index they can be used to

Chat Online### Ball Mill Design/Power Calculation

The basic parameters used in ball mill design (power calculations) rod mill or any tumbling mill sizing are material to be ground characteristics Bond Work Index bulk density specific density desired mill tonnage capacity DTPH operating solids or pulp density feed size as F80 and maximum chunk size product size as P80 and maximum and finally the type of circuit open/closed

Chat Online### calculate circulating load ball mill

The Effect of Circulating Load and Test Sieve Size on The Bond In this study the effect of circulating load (CL) and test sieve size (P ) which are inaccuracies of Bond grindability on the Bond ball mill grindability (Ghg) and work index (W ) are to determine Bond work index (Berry Bruce 1966 .

Chat Online### sagdesign

-BWI = Bond ball mill work index on SAG ground ore kWh/ton ground F 80 = 80 passing of SAG ground of the test feed size microns P 80 = 80 passing from the test product size microns P cs = Bond closing screen size microns G pb = Ball mill grindability (average of last three cycles) gr/rev Determination of the SAG and Ball Mill Pinion Energy

Chat Online### SINGLE STAGE SAG/AG MILLING DESIGN

Regardless of the test used each sample should be twinned with a Bond Ball Work Index or xMedium Grind80 passing size between 106 and 75 µm. To mill in single stage SAG Regardless of the test used each sample should be twinned with a Bond Ball Work Index or xMedium Grind80 passing size between 106 and 75 µm. To mill in single stage SAG configuration the power base modelling is utilised. OMC generally use power Chat Online### LABORATORY MANUAL OF TEST PROCEDURES FEBRUARY

SUBJECT Laboratory Manual of Test Procedures Manual of Test Procedures February 2020. Each test method is assigned a unique serial number three digits long. A suffix number of two digits indicates the year in order to differentiate revisions. Thus test 307-95 indicates test 307 was adopted in

Chat Online### Investigating of the effect of ore work index and particle

where Wi is the work index of ore (kWh/t) P i test sieve size at which the test is performed G bg Bond s standard ball mill grindability net weight of ball mill product passing sieve size P i where Wi is the work index of ore (kWh/t) P i test sieve size at which the test is performed G bg Bond s standard ball mill grindability net weight of ball mill product passing sieve size P i produced per mill revolution (g/rev.) P80 sieve opening at which 80 of the product passes (μm) F80 sieve opening at which 80 of the feed Chat Online### Cement Grinding OptimizationLinkedIn SlideShare

Jul 31 2014 · The following modified Bond equation was proposed for crushing (Magdalinovic 1990) Wc = cP A Wi ( cP 10cF 10 ) (8) where Wcis energy consumed for clinker crushing (kWh/t) Wiis Bond ball mill work index (kWh/t) Pc -is sieve size passing 80 of the clinker after crushing (µm) Fcis sieve size passing 80 of the clinker before

Chat Online### (PDF) Reducing Grinding Energy and Cost -Magnetite Iron

There is significant case study published regarding energy savings and cost efficiencies of the comminution process due to HPGR. Energy savings ranging from 10 to

Chat Online### QUICK METHOD FOR BOND WORK INDEXAPPROXIMATE

The aim of this study was to develop a new method for assessing the Bond work index in a ball mill (BBWI) which is based on a first order kinetics present in the Bond ball mill for grinding mineral raw materials (Austin et al. 1981 Ahmadi and Shahsavari 2009). Theoretical basis of quick procedure

Chat Online### Bond Index Hardgrove Grindability Index Tests for

Bond Index Test Test conducted on a Bond Index testing mill (Bico-Braun USA) 700ml of sample milled for 100 revolutions. New number of revolutions is calculated to produce fines equal to 1/3.5 of the total charge of the mill. The Bond Work Index W i expresses the resistance of the material to

Chat Online### Improved characterisation of ball milling energy

The Bond Ball Mill Work index (BBWi) is the industry standard procedure for assessing the grindability of ores. The test involves conducting a locked-cycle grinding test using Bond s standard mill design. The locked-cycle test enables a batch process to emulate the grinding behaviour of a continuous mill with a 250 recirculating load.

Chat Online### Sample Preparation Sieve AnalysisRETSCH laboratory

Rotor Mills ZM 200 TWISTER SR 300 SK 300. Cutting Mills SM 100 SM 200 SM 300 SM 400. Knife Mills GM 200 GM 300. Mortar Grinders RM 200. Disc Mills RS 200 RS 300 DM 200 DM 400. Ball Mills Emax MM 200 MM 400 MM 500 nano MM 500 cryo CryoMill PM 100 PM 100 CM PM 200 PM 400 PM GrindControl XRD-Mill McCrone TM 300 TM 500

Chat Online### Bond Index Hardgrove Grindability Index Tests for

Bond Index Test Test conducted on a Bond Index testing mill (Bico-Braun USA) 700ml of sample milled for 100 revolutions. New number of revolutions is calculated to produce fines equal to 1/3.5 of the total charge of the mill. The Bond Work Index W i expresses the resistance of the material to

Chat Online### Bond Work Index Procedure and Method

Cleaning and Storing of Ball Mill Charge after the Bond Work Index Procedure is done Add about 500 g of silica sand into the mill containing the ball charge. Seal the mill. Rotate for 20 revolutions to clean. Empty the mill charge and sand into the ball try once grinding is complete. Clean out the mill using a brush. Put the lid on the mill.

Chat Online### ttmining procedure to operate a ball mill

Ball mills have been the traditional method of comminution in the mineral processing industries and continue to operate with old generation classifiers their maintenance sometimes neglected. This in combination with an inefficient operation translates into high energy consumption and low production.

Chat Online### Size Reduction and Energy RequirementScienceDirect

A change in transfer size can be accommodated between 0.4 and 3.5 mm by an adjustment using the Bond ball mill work index. Starkey found that there was no observable difference in the energy consumption in a SAG mill or ball mill in this size range. This method of estimating mill power requirement has been successful in recent years. 3.4.6.

Chat Online### Technical InformationSMC Testing

However if the sample is to be prepared by cutting with a diamond saw (cut-core method) as little as 5kg is normally sufficient. Also remember that the products from the SMC Test® can be re-used for Bond ball work index testing the SMC Test® being effectively used as a feed preparation step for the Bond ball work index test.

Chat Online### Model Morrell SS SAGSAGMILLING

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

Chat Online### Model Morrell Mi SMC SAGSAGMILLING

The method requires all the elements of the ball mill work index test to be filled in Ball mill Wi test closing screen size umclosing µm Ball mill Wi test product size P 80 µm Ball mill Wi test feed size F 80 µm Ball mill Wi grams per revolution at test conclusion gpr Required parameters. F 80 µm is the 80 passing size of the

Chat Online### about smc test rev 1

DWi and point load index (IS50) making it valuable in Mine-to-mill studies as well. For power-based calculations the SMC Test® also provides the comminution indices Mia Mih and Mic which are routinely reported when a test is carried out (see Table 1 below). In conjunction with the Bond ball mill work index they can be used to

Chat Online### MODELING THE SPECIFIC GRINDING ENERGY AND BALL-MILL

21 CONCLUSIONS Continued In the present work equations were also derived giving zthe ball-mill power drawP as a function of its dimensions internal mill diameter D and length L zthe ball-mill power drawP as a function of the feed D f (mm) and the product size d (mm) the Bond work index w i (kWh/short ton) and the mill throughput T (short ton/h) zthe ball-mill dimensions (D and L) when

Chat Online### Energy Efficient Ball Mill CircuitEquipment Sizing

The basis for ball mill circuit sizing is still B ond s methodology (Bond 1962). The Bond ball and rod The Bond ball and rod mill tests are used to determine specific energy c onsumption (kWh/t

Chat Online### CALCULATION OF THE POWER DRAW OF DRY

Bond ball mill grindability test for overflow wet ball mills. An approach was proposed by Erdem (2002) for dry multi-component cement grinding ball mills using the results of the Bond ball mill grindability test. For all model based methods a reliable method to calculate mill power draw for a

Chat Online### (PDF) Review on Simulation of Work Index Determination

The work index is an empirical measure of the energy input required for grinding ores from a specific particle size to the design particle size. Bond designed the work index ball mill with strict

Chat Online### ttmining procedure to operate a ball mill

Ball mills have been the traditional method of comminution in the mineral processing industries and continue to operate with old generation classifiers their maintenance sometimes neglected. This Ball mills have been the traditional method of comminution in the mineral processing industries and continue to operate with old generation classifiers their maintenance sometimes neglected. This in combination with an inefficient operation translates into high energy consumption and low production. Chat Online### Comparison of Ore Hardness Measurements for Grinding

size F80 of 152 mm to 80 passing 1.7 mm and a simple adjustment procedure in case the SAG product size needed to be adjusted. Bond rod and ball mill work indices are readily converted to pinion energy for rod and ball mills but not for SAG mills. Reproducibility while not studied in this paper is clearly a part of the meaningfulness of the data

Chat Online### Bond Ball Mill Supplier Crusher Mills Cone Crusher Jaw

QM-3 Ball Mill for Measuring Grinding Work Index View ball QM-3 Ball Mill for Measuring Grinding You can Contact the Supplier for More ball mill This ball mill also called mill for measuring bond work

Chat Online### Amdel Analytical Laboratories . . Amdel A-Z

Bond Ball and Rod Mill Work Indices The work index is a measure of the resistance of an ore to grinding. It is used to calculate mill power and the size of grinding media required. The ball and rod mill work indices are determined by cyclic grinding tests in standard mills with standard grinding charges.

Chat Online### SAGDesign Case Studies

Where Wi is the Bond Ball Mill Work Index P 80 is the comminution step product size F 80 is the comminution step feed size Because there is no difference in energy consumption in the SAG mill and the Ball mill in the above noted adjustment size range the T80 can be adjusted to give a desired power split between the SAG mill and the Ball mill.

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