# drive calculation for a ball mill jar

### Variable frequency AC drive VFD for Chinaware ball mill

Variable frequency drive VFD for Chinaware ball mill With the world facing a growing energy crisis because of limited oil reserves and carbon emissions causing global warming China is dedicated to optimizing its energy management.

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Rolling load calculation 3.1 Properties of Material to be used for Hot Rolling MaterialA36 Mild Steel UTS400 Mpa Yield Strength250 Mpa Elongation20 Carbon0.26 Density7800 kg/m 3 Poisons ratio0.26 Shear Modulus79.3 Gpa Table 1 Effect of Temp on UTS PASSES TEMPARATURE ̊C ULTIMATE TENSILE STRENGTH

Get Price### Laboratory MillsMRC Lab

Ball mills are characterized by their smaller comparatively diameter and longer length and often have a length 1.5 to 2.5 times the diameter The feed is at one end of the cylinder and the discharge is at the other Small versions of ball mills can be found in laboratories where they are used for grinding sample material for quality assurance.

Get Price### SAG mill ball charge determination and its influence on

SAG mill ball charge determination and its influence on mill drive requirements Abstract In semi autogenous grinding SAG the grinding mill inventory i.e volume of total charge volume of ball charge etc is important in determining the optimum operating condition for maximum production tph minimum specific energy kwh/t or lowest

Get Price### Maximum Stepover calculationAutodesk Community

Maximum Stepover calculation Doing a 2D pocket looking at the formula for Max Stepover Math.max tool diameter 2 tool cornerRadius 0.95 tool diameter 0.20 Using a standard end mill there is no way to specify the corner radius It appears to always pick the first formula as the max .

Get Price### Selecting Inching Drives for Mill and Kiln Applications

of the inching reducer drive can be added to reflect efficiency losses P inch = P inch 1 stage 0.01 where stage is the number of reductions between the inching drive motor and the main drive input shaft or mill pinion if direct driven Round up P inch to the next standard motor power This standard motor power becomes the incher

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the desired motor power and drive rating the maximum design mill speed and the maximum design ball charge volume Barratt 1989 For single pinion and dual pinion drives with 21 MW now a distinct possibility the probability of pinion changes to a higher mill speed should always be

Get Price### Grinding ball mill girth gear root clearanceCR4

How do you measure the root clearance between a girth gear and a pinion of a grinding ball mill and what is the recommended root clearance This ball mill uses helical gears i.e 284 teeth girth gear with a 24 teeth pinion .

Get Price### Grinding Circuitan overview ScienceDirect Topics

The ball mills are operated at a ball charge volume of 30–32 and 78.5 critical speed The SAG mill trommel undersize is combined with the ball mills discharge and pumped to two parallel packs clusters of twelve 660 mm diameter cyclones The cyclone underflow from each line reports to a ball mill while the cyclone overflow is directed

Get Price### Attritor How attritor Works Attritor working Dry

MIKRONS Attritor is used for producing fine homogenous dispersions quickly repeatedly under controlled conditions Used for the manufacture of ceramics inks paints coatings metal oxides ferrites chocolates chemicals pharmaceuticals The Attritor is often referred to as a agitated ball mill.

Get Price### MATERIAL RETENTION TIME IN A BALL MILL VRM

Re MATERIAL RETENTION TIME IN A BALL MILL VRM You could do that by measuring the material flowrate Q tons/h through the mill as well as the quantity M tons of material that accumulates within the mill The retention time also called residence time is the ratio M/Q h .

Get Price### making your own porcelain ball mill jarsStudio

1 You don t need a round jar Make a jar and mount it in a round metal sleeve that has been turned true and cylindrical or make your ball mill so that it has a cradle to hold the jar 2 see #1 It makes #2 a non issue Usually you want to make ball mill jars thicker than normal wares to make up for the wear of the grinding media inside.

Get Price### Ball Mill Design/Power Calculation

A motor with around 1400 Horse Power is calculated needed for the designed task Now we much select a Ball Mill that will draw this power The ball mill motor power requirement calculated above as 1400 HP is the power that must be applied at the mill drive in order to grind the tonnage of feed from one size distribution.

Get Price### AMIT 135 Lesson 7 Ball Mills CircuitsMining Mill

Ball Mill Operation Ball mills ride on steel tires or supported on both ends by trunnions Girth gears bolted to the shell drive the mill through a pinion shaft from a prime mover drive The prime movers are usually synchronized motors During rotation a portion of the charge is lifted along the inside perimeter.

Get Price### Mill sizing methodthecementgrindingoffice

Please find below two calculators for sizing mills using the Bond and Rowland methods Ball mill sizing Calculator for ball mill s in a single stage circuit Rod ball mill sizing Calculator for rod mill s as first stage of the circuit and ball mill s as second stage of the circuit.

Get Price### drive calculation for a ball milljsemzjitrni

drive calculation for a ball mill operation drive calculation for a ball mill operation Nov 12 2013 ball mill power dear experts we have a ball mill in combi mode for cement grinding roller press before the ball mill the supplier has given 28 grinding media filling with shaft power 2270 kw only ball mill size is 4411 m grinding media size is max 30mm it is a monochamber mill designed to

Get Price### Ball Mill Design/Power CalculationLinkedIn

Ball Mill Power Calculation Example A wet grinding ball mill in closed circuit is to be fed 100 TPH of a material with a work index of 15 and a size distribution of 80 passing ¼ inch 6350 microns .

Get Price### How can one select ball size in ball milling and how much

Popular Answers 1 More balls with small size results in fine powder As a thumb rule powder to be milled should be taken as 25 of total ball weight If the quantity of charge is very less then

Get Price### 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.

Get Price### Grinding Circuitan overview ScienceDirect Topics

The ball mills are operated at a ball charge volume of 30–32 and 78.5 critical speed The SAG mill trommel undersize is combined with the ball mills discharge and pumped to two parallel packs clusters of twelve 660 mm diameter cyclones The cyclone underflow from each line reports to a ball mill while the cyclone overflow is directed

Get Price### Ball Millan overview ScienceDirect Topics

Ball mills tumble iron or steel balls with the ore The balls are initially 5–10 cm diameter but gradually wear away as grinding of the ore proceeds The feed to ball mills dry basis is typically 75 vol ore and 25 steel The ball mill is operated in closed circuit with a particle size measurement device and size control cyclones.

Get Price### Calculate and Select Ball Mill Ball Size for Optimum Grinding

In Grinding selecting calculate the correct or optimum ball size that allows for the best and optimum/ideal or target grind size to be achieved by your ball mill is an important thing for a Mineral Processing Engineer AKA Metallurgist to do Often the ball used in ball mills is oversize just in case Well this safety factor can cost you much in recovery and/or mill liner wear and tear.

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

balls which exist in mill 𝐴𝑏 each ball abrasion g 𝐴t total ball abrasion in the mill g 𝑣b each ball volume m3 𝑓b supposed ball filling percentage A r ball abrasion rate in the mill If above calculation were done again for 𝑓b = 2 total ball abrasion will get 60.96 finally.

Get Price### How to calculate the shaft diameter from the torque

Maximum torque that can be operated on the shaft T Max = 2070.06 N m From this maximum operating torque we can find the shaft diameter with above equation 2070.06 x 10 3 N mm = 70Mpa N mm 2 x π x d 3 16 d 3 = 150687.075 mm d = 53.19 mm The required shaft diameter will be a

Get Price### Design Method of Ball Mill by Sumitomo Chemical Co

Design Method of Ball Mill by Discrete Element Method collected The diameter of the gibbsite powder was measured using a Master Sizer 2000 Sysmex Corpora tion Details of the experimental conditions are given in Table 2 Results and Discussion 1 Effects of Fins on Ball Motion in the Mill To predict ball mill grinding behavior using the dis

Get Price### WHAT IS THE FORMULA TO DETERMINE STEPS PER INCH

The resolution for any of our machines is based on the driver microsetting setting and the machanical parts used for each axis For example The blueChick uses 9 tooth drive sprockets for the x and y axes To determine resolution use this formula Resolution = steps inch or the travel in steps for one revolution of the drive sprocket Steps = motor steps driver microsteps or natural

Get Price### Lead Screw Torque and Force CalculatorDaycounter

Lead Screw Torque and Force Calculator When designing machinery that uses lead screws it s a common task to try and figure out the size of motor needed to drive a given force with a lead screw This calculator will calculate torque given the lead screw parameters and the required force There are two torques the torque to raise the load and

Get Price### Attritor How attritor Works Attritor working Dry

MIKRONS Attritor is used for producing fine homogenous dispersions quickly repeatedly under controlled conditions Used for the manufacture of ceramics inks paints coatings metal oxides ferrites chocolates chemicals pharmaceuticals The Attritor is often referred to as a agitated ball mill.

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Outotec has designed manufactured and installed over 8 000 ball and pebble mills all over the world for a wide range of applications Some of those applications are grate discharge peripheral discharge dry grinding special length to diameter ratio high temperature milling oprations and more All equipment adheres to the applicable

Get Price### Ball mill media optimizationMetcom Tech

torque mill test is the mill energy input divided by the solids load The energy specific cumulative grinding rate at each screen size is calculated from a torque mill test as in the example that follows Torque mill solids load during test 11.25 kg 24.8 lb of ball mill feed sample from plant survey Sample is reconstituted with water to be

Get Price### Variables in Ball Mill Operation Paul O Abbe

A Slice Mill of 72 diameter by 12 wide would replicate the result of a normal production mill 72 in diameter as 120 long A Slice Mill is the same diameter as the production mill but shorter in length Click to request a ball mill quote online or call to speak with an expert at Paul O Abbe to help you determine

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Newfoundland and Labrador Canada Distance Chart Distance Table For your quick reference below is a Distance Chart or Distance Table of distances between some of the major cities in Newfoundland and Labrador Canada Note The distance between cities in Newfoundland and Labrador Canada distance chart below is straight line distance may be called as flying or air distance between the

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The mill is shell supported mounted on slide shoe bearings at both ends and made completely as a welded design The mill with the compact drive version features an INTEGRAL DRIVE whose planetary gear is mounted to the mill flange KHD Humboldt Wedag mills are the result of the most advanced calculation and simulation methods backed by years

Get Price### Estimation of shear rates inside a ball millScienceDirect

The Hellyer ball mill operated at high slurry viscosity with a Reynolds number less than 10 Eq 13 is hence valid for calculation of the superficial velocity of slurry drained through the active charge for this particular ball mill.

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How to calculate ball to powder ratio Question 6 answers Asked 11th Dec 2019 Vijay Sarode I want to ball mill 60 gm of Al powder in steel jar with 10mm diameter ball size What will be the

Get Price### Design Construction and Performance Analysis of a 5

Since for the ball mill design we are using 80 passing the required value of C2 for the ball mill will be equal to1.20 C3 is the correction factor for mill diameter and is given as 𝐶𝐶3 = 2.44 𝐷𝐷 0.2 3 However it is important to note that C3 =0.914 vessel used in producing the ball mill was got from a

Get Price### Effect of ball and feed particle size distribution on the

The ball mill liners and grinding media employed were made from stainless steel This material of construction is superior over all else because of its durability and resistance to wear and tear It is due to these reasons that contamination of the material was ruled out Experimental validation on the absence of contamination through

Get Price### Ball Mill LoadingDry MillingPaul O Abbe

The starting point for ball mill media and solids charging generally starts as follows 50 media charge Assuming 26 void space between spherical balls non spherical irregularly shaped and mixed size media will increase or decrease the free space 50 x 26 = 13 free space

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28 MW GMD for 42 SAG mill Whether it is size or an installation at the highest altitude 4600 m.a.s.l ABB s GMDs are well positioned to contribute to the building of larger and ever more powerful mills Leading the gearless mill drive evolution The ABB gearless mill drive GMD is the most powerful mill drive system available

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RETSCH is the world leading manufacturer of laboratory ball mills and offers the perfect product for each application The High Energy Ball Mill E max and MM 500 were developed for grinding with the highest energy input The innovative design of both the mills and the grinding jars allows for continuous grinding down to the nano range in the shortest amount of timewith only minor warming

Get Price### How can one select ball size in ball milling and how much

Popular Answers 1 More balls with small size results in fine powder As a thumb rule powder to be milled should be taken as 25 of total ball weight If the quantity of charge is very less then

Get Price