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### Modelling SAG milling power and specific energy

01 01 2015 For example for an 36′ 17′ SAG Mill with a power consumption of 11.7 MW operating at 73 solids 13.5 balls charge and at 76 of the critical speed with 50 of the feed in the size class −6″ 1″ it could be possible to increment in 2 the balls charge to 15.5 reducing the −6″ 1″ to 34.8 with no changes in the

Chat Online### The power consumption calculation of a ball drum mill

Specific energy consumption for the grinding dropped down to 30 Current methods of power consumption calculation of a mill drive do not allow determining the power consumption for ball

Chat Online### calculation of power consumption for ball mills and

Calculation Of Grinding Media In Ball Mill Calculate Top Ball Size of Grinding Media Equation Method Calculate Top Ball Size of Grinding Media FRED C BOND Equation Method Previous Next Although it was developed nearly 50 years ago Bond s method is still useful for calculating necessary mill sizes and power consumption for ball and rod mills.

Chat Online### AMIT 135 Lesson 6 Grinding Circuit Mining Mill Operator

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.

Chat Online### Calculation Of Power Consumption For Ball Mills And Crusher

Ball Mill Power Consumption Ball Mill Power Calculation Pdf Mill is the energy consumption the power supplied to the mill is used primarily to lift the load medium and charge additional power is required to keep the mill rotating 813 power drawn by ball semiautogenous and autogenous mills a simplified picture of the mill load is shown in figure 83 ad this can be used to establish the

Chat Online### Relationships between comminution J energy and product

facilitate the calculation of specific grinding energy Results Table I shows the Bond ball mill work index obtained for the ore samples as well as the iron and silica content in concentrate and tail after LIMS The concentrate weight recovery was in the order of 50–60 Furthermore it may be observed that the Bond ball mill work indices for

Chat Online### CORRELATION BETWEEN BOND WORK INDEX AND

Grinding energy Crushing resistance 1 INTRODUCTION Comminution in a mineral processing plant or mill involves a sequence of crushi ng and grinding processes 1 2 In order to design the comminuting process of a r ock the required energy for crushing and grinding of the rocks must be calculated This e nergy

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

of the Bond ball mill grindability test For all model based methods a reliable method to calculate mill power draw for a given mill is required for the calculation of power draw Morrell 1996 proposed a mathematical model for autogenous semi autogenous and ball mills which is based on the motion of grinding charge inside the mill.

Chat Online### v118n5a12 Particle size distribution and energy

energy consumption of rock impact crushing a custom made experimental rig was used for impact crushing tests on single particles of granite The particle size distribution of the crushed product was analysed as well as the sand production ratio and energy consumption per unit sand product under

Chat Online### Vertical roller mill for raw Application p rocess materials

1 The power consumption level for grinding is lower than that of tube ball mill 2 The remaining time of raw materials in this type of mill is much shorter than that in tube ball mill therefore the crushing process and mixing process became more harmonized and this contributes to quality control.

Chat Online### Modelling SAG milling power and specific energy

01 01 2015 For example for an 36′ 17′ SAG Mill with a power consumption of 11.7 MW operating at 73 solids 13.5 balls charge and at 76 of the critical speed with 50 of the feed in the size class −6″ 1″ it could be possible to increment in 2 the balls charge to 15.5 reducing the −6″ 1″ to 34.8 with no changes in the

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conventional crushing and grinding circuits crusher rod ball mill or crusher ball mill By the 1970s the application of conventional tended to be limited to relatively low capacities circuits The majority of modern grinding circuits include a SAG mill a ball mill and/or a combination thereof The use of Bond

Chat Online### Roll crusher.ppt

18 10 2015 Crushing of coal and calculation of size reduction efficiency which provides a favourable ore size distribution for ball mill feed 7 The roll crusher has a simple structure grinding teeth vulnerable to hard material High energy consumption 10/18/201514ch42 14ch24 7 Roll Crusher 8 10/18

Chat Online### PDF Effect of circulating load and classification

The ball mill is the most common ore grinding technology today and probably more than 50 of the total world energy consumption for ore grinding is consumed in ball mills.

Chat Online### calculation of power consumption for ball mills and grinding

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

Chat Online### Towards a Better Understanding of Stirred Milling

TOWARDS A BETTER UNDERSTANDING OF STIRRED MILLING TECHNOLOGIESESTIMATING POWER CONSUMPTION AND ENERGY USE Peter Radziszewski1 Jonathan Allen2 1MetsoMinerals Canada 795 ave George V Lachine Québec Canada H8S 2R9 Corresponding author peter.radziszewski 2Metso Mining and Construction Technology 2715 Pleasant Valley

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Finding the total specific energy consumption in the wet autogenous mill central discharge ball mill circuit WAM CDBM In the framework of the discussed method total SEC in WAM CDBM circuit is found based on total SEC in a con ventional circuit including medium and fine crushing and rod and ball milling.

Chat Online### AMIT 135 Lesson 5 Crushing Mining Mill Operator Training

Calculation of reduction ratio in crushing image 135 5 3 Crushing Equipment The selection of the right crushing equipment is influenced by many factors some of which are upstream of the crushing plant e.g blasting pattern and mining method and others which are downstream of the crushing plant e.g mill and grinding circuit selection .

Chat Online### Calculating Crushing Constant Using Bond S Law

Calculating crushing constant using bonds law bond work index formula equationee this useful summary table of bond work index by mineralsor any circuit whether a crushing circuit a rod mill or a closed ball mill circuit the work index always means the equivalent amount of energy to reduce one ton of bond s law for crushing mills Read More.

Chat Online### Vertical roller mill for raw Application p rocess materials

1 The power consumption level for grinding is lower than that of tube ball mill 2 The remaining time of raw materials in this type of mill is much shorter than that in tube ball mill therefore the crushing process and mixing process became more harmonized and this contributes to quality control.

Chat Online### COMPARISON OF HPGR

Bond ball mill work index C Wi Bond crusher work index D HPGR roll diameter m E sp net specific energy consumption kWh/t F HPGR hydraulic pressing force kN F 80 particle size at which 80 of particles pass in feed F SP 2HPGR specific pressing force N/mm L HPGR roll length m ṁ or m dot HPGR specific throughput constant ts/hm3

Chat Online### calculation of specific power consumption of ball mill

Home>Crusher and Mill >specific power consumption in Cement mill including cement ball mills and cement power consumption in ball mill power consumption of a ball mill calculation of specific power consumption of ball mill with roller press bentonite ball mill specific power consumption power consumption of ball mill

Chat Online### calculation of specific power consumption of ball mill

calculation of specific power consumption of ball mill with email protected Based on many years of market experiences and R D experiences HGT gyratory crusher was produced with integration of mechanical hydraulic 20TPH vertical mill for limestone desulfurization in power plant 325mesh calcium carbonate production line MTW

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5 A material crushed in a Blake jaw crusher such that the average size of particle is reduced from 50 mm to 10 mm with consumption of energy 25 10 points kW/ kg/s what wou d be the consumption of energy needed to crush the same material of average size 75 mm to an average size of 25 mm if Rittinger s law is applied 3.457 5.329 8.333 10.437

Chat Online### THE EFFICIENCY OF BLASTING VERSES CRUSHING AND GRINDING

Crushing is done in three stages reducing to 80 passing 2 cm 3/4 inch Rod and ball mills take the ore down to an 80 passing size of 60 microns 270 mesh METHODOLOGY The Bond equation is a useful tool to compare predicted and actual values of energy requirements for each step in taconite comminution Crushing and grinding energy are measured

Chat Online### Calculation Of Power Consumption For Ball Mills

Powder Consumption Of Ball Mills Power consumption of ball mill 183 calculation of power consumption for ball mills and grinding gulin crushing screening horsepower calculations to rotate a ball mill technomine services llc sag product will draw more power from the sag mill and less power from the ball mill metal consumption analyses also on the ball milling

Chat Online### calculation of power consumption for ball mills and ball mil

Power consumption of ball mill power consumption of ball mill Crusher MillLiming Heavy Industry The ball mill is a key equipment to grind the crushed materials and the ball mill is widely used in powder making production line including cement calculation of for ball mills grinding power

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Calculation Of Power Consumption For Ball Mills And Calculation of power consumption for ball mills and grinding fob reference price get latest price ball mill power page 1 of 2 nov 12 2013 the supplier has given 28 grinding media filling with shaft power 2270 kw only ball mill size is 11 m grinding media size is max 30mm it is a monochamber mill designed to grind the roller press product if

Chat Online### Calculation Of Power Consumption For Ball Mills And Crusher

How To Calculate Power Consumption In Ball Mill Calculation Of Power Consumption For Ball Mills As the ball wear rate depends directly on the surface of the media charge a small variation in power will lead to an important increase of wear rate The risk of underloading or overloading the mill is an additional factor A direct measurement of the ball level in the mill more accurate than power

Chat Online### ball mill power consumption formula

19 04 2013 ball mill specific energy calculation Crusher South Africa ball mill efficiency calculations OneMine Mining and E = 0.67 2.01 4.63 = 7.31 kWh/tonne Total SAG and ball mill circuit specific energy consumption .

Chat Online### GMSG GUIDELINE DETERMINING THE BOND EFFICIENCY OF

Bond Test WI s kWh/t Rod Mill Ball Mill 9.5 kWh/t.8 9 kWh/t Bond Standard Circuit Work Index Assume the rod mill Work Index of 9.5 applies from the actual rod mill feed sizeof 19 300 mµ although some of this work might ideally be done by crushers to achieve a rod mill F80 of 16 000 m to a rod µ mill circuit product size of 1 000

Chat Online### Using the Bond work index to measure operating comminution

01 11 1998 Report of Committee on Comminution and Energy Consumption 1981 National Materials Advisory Board National Academy of Sciences Publication NMAB 1981 Google Scholar

Chat Online### The energy efficiency of ball milling in comminution

01 11 2002 He reported that the specific energy for ball milling of quartz is 107 J/m 2 Schellinger s calculated ball mill efficiency in dry or wet ball mill grinding ranges between 10 and 19 with the higher figure occurring at the optimal mill loading.

Chat Online### How to Measure Grinding Efficiency

20 04 2018 The power per tonne for rod milling is determined from the rod mill feed rate and the power per tonne for ball milling is determined from the ball mill feed rate Note the efficiency factor of 1.22 lines up with the 1.2 factor recommended for selecting rod mills for rod milling circuit when feed is produced with closed circuit crushing.

Chat Online### calculation of power for ball mills and grinding

Power Calculation For Ball Mills Grinding mills power consumption kw knows the power consuption in kw per ton of a ball and tube coal mill power consumption cement mill raymond get price and support online ball mill designpower calculation the basic parameters used in ball mill design power calculations .

Chat Online### Ball Mill Power Consumption

Ball Mill Power Consumption Formula mill is the energy consumption The power supplied to the mill is used primarily to lift the load medium and charge Additional power is required to keep the mill rotating 813 Power drawn by ball semiautogenous and autogenous mills A simplified picture of the mill load is shown in Figure 83 Ad this can be used to establish the essential.

Chat Online### How To Calculate Mills And Crushers Power Requirement

how to calculate mills and crushers power requirement Crusher Stone Industrial Machine Europe Only Only Machine List european jaw crusher industry overview of stone crushing how to estimate the cost of crushing and screening ball mill efficiency vs temperaturePower calculation of impact coal crusher based on bondHow to calculate pulverisers mills and crushers power the test determines the

Chat Online### calculation of power consumption for ball mills and grinding

calculation of specific power consumption of ball mill Note energy consumption is strongly dependent on the changes of fan terms of power if a ball mill is used for raw grinding It fan and roller press fan if roller press is used In addition to efficiency can be calculated

Chat Online### Grinding control strategy on the conventional milling

milling circuit consists of a rod mill followed by a ball mill in series Crusher product 9 mm is fed to the rod mill and the water is fed in ratio to the ore feed mass The rod mill discharge is pumped without any further water addition to the first ball mill The ball mill discharges to a sump where water is

Chat Online### power consumption formula for crusher

Power Consumption Calculation Formula For Coal Crusher capacity of hammer crusher calaculationcalculation of torque of hammer millhammer crushers calculation basic formulas horse power calculations to .specific power consumption in crushers li ne crusher specific energy consumption vs loading electrical power consumption crushing equipment get price pe series copper ore jaw crusher

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

has to supply this energy and it has a different higher work index than the crusher ie the ball mill is less energy efficient than a crusher and has to input more energy to do the same amount of size reduction Hence from equation 7 to crush to the ball mill circuit feed size x 2 in open circuit requires specific energy equivalent to f

Chat Online### AMIT 135 Lesson 6 Grinding Circuit Mining Mill Operator

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.

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