May 15 2015 1 rod milling a rod mill with a diameter of 244 meters inside new liners grinding wet in open circuit 2 ball milling a ball mill with a diameter of 244 meters inside new liners grinding wet in

Hi collegues a month back i asked for help to increase grind size but i did not have enough data now i have the data i am currently grinding to an average of 110 microns but i would like to increase to 150 mill throughput is now at 70 thr the ball mill is in closed circuit with the cyclones mill diameter inside liners is 4m effective grinding length is 53m critical speed is 765

Jan 01 2020 the discharge end design of a ball mill plays an important role in discharging the desired particle sizes 150 10 m and the percentage of recirculating load from the discharge end of

Ball mill design a survey of australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters morrell 1996 autogenous mills range up to 12 meters in diameter the lengthtodiameter ratios in the previous table are for normal applications for primary grinding the ratio could vary between 11and 181

Maxfeeding sizemm discharge size mm outputth motor power kw 3638 15 20 0075089 0652 185 36 27 20 0075089 1135 22 36 3 25 007506 1548 30 36 35 25 007404 165 37 324 5 25 007404 1658 55 297 75 25 007404 25 75 27 11 25 007404 36 110 28 12 25 007404 356 130 254 11 25 007404 410 130 254 15

Rate at each screen size is calculated from a torquemill test as in the example that follows torque mill solids load during test 1125 kg 248 lb of ball mill feed sample from plant survey sample is reconstituted with water to be the same percent solids as the plant ball mill discharge mill speed 352 rpm 65 percent of critical speed

Ball mills tumble iron or steel balls with the ore the balls are initially 510 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 particlesize measurement device and sizecontrol cyclones

Nov 18 2008 basic principle ball mill is generally used to grind material 14 inch and finer down to the particle size of 20 to 75 microns to achieve a reasonable efficiency with ball mills they must be operated in a closed system

Jun 23 2020 if a mill has available power conversion of the discharge arrangement from overflow to grate can be beneficial in allowing increased throughput or a finer product size conversely if the mill does not have available power then it is still possible to install a grate discharge and to draw the same power by using a lower ball charge

Ball mill cylinders mill cylinders are typically supplied with a cooling jacket on their cylindrical portion for temperature control especially when processing temperaturesensitive materials for extreme temperatures the ends of the cylinder can also be furnished with cooling apparatus view a reverse engineered patterson ball mill cylinder available cylinder sizes range from laboratory mills to 12 in diameter discharge

Jan 01 2020 case 2 effect of mill speed on the particle size distribution of the product and the recirculating load of the ball mill with lifters and the cap open at the discharge lifter design and mill speed play a very important role in the flow and discharge of particles from the mill

Ball mill grinding and particle sie separation ball mill design discharge particle sie ball mill grinding and particle sie separation ball mill grindingandparticle size separation difference ball millandrod millis mainly for grinding grain size of not more than afterball mill grindingits range of variation for aparticle sizeis below 15mm

At what particle size does rock crushing or grinding what about the ball mill use wiki answers the ball mill is a key equipment to grind the crushed materials and the ball mill is the cylinder is made into cone shape in the discharge end the production the answer is relative to the particle size the type of mill and the mill

The mill grinding rate through the size of interest 150 m the circuit target p80 calculated from the plant survey data using the functional performance equation was 00568 t kwh the energy specific cumulative grinding rates for the survey calculated from ball mill feed and discharge size

Position aperture size and particle size the thesis has provided improvements to the previous agsag mill discharge understanding in terms of discharge rates and grate classification in relation to mill load and operating parameters

Besides particle size reduction ball mills are also widely used for mixing the design of a ball mill can vary significantly depending on the size overflow discharge mill diaphragm or

Twin discharge air classification system latest innovation in air classification design fine particle cuts from 250 microns down to 3 microns twin rotor discharge allows higher rpm for a given feed rate or cfm requirement twin discharge allows smaller diameter rotor there by increasing efficiency and top size

Nov 26 2019 the particle size of the materials to be ground is 300 400mm sometimes even larger and the minimum particle size of the materials to be discharged can reach 01 mm the ball mill adopts a discharge screen similar to the ball mill and the function of blocking the internal medium of the overflow ball mill is accomplished inside the

Mar 08 2021 though there is no sieve plate the discharge pipe is cast with reverse threads which makes that the large ores and balls are hard to discharge from the ball mill machine overflow discharge ball mill can grind ores into the size under 02 mm so it is very suitable for the second grinding system the capacity of it is about 15 lower than

Ball mill design discharge particle sie we are a highend mining machinery manufacturer in asia the main production equipment includes crusher sand making machine ball mill raymond mill cement equipment and other products our products are widely applied in industries such as metallurgy mines chemical engineering building materials

8322 ball mills the ball mill is a tumbling mill that uses steel balls as the grinding media the length of the cylindrical shell is usually 115 times the shell diameter figure 811 the feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 2040 water by weight

Ball mills capacity from 0290 th advantagesdesigned for long service life minimum maintenance can grind and homogenize mineral ores down to the nano range large volume of processing capacity max feeding size 25mm discharge size007504mm typesoverflow ball mills grate discharge ball mills service 24hrs quotation custom made parts processing

In comparison the power intensity of a ball mill is about 20 kwm3the highfigure 5 component size distributions of mount isa mines tower mill feed and discharge bulk pbzn rghr con particle size mirons 56789 20 30 40 5010 percentage passing 20 30 40 60 80 90 10 100 pb in feed gangue in feed pb in discharge

The product size distribution is narrower than a ball mill but significantly coarser most are overflow discharge type lengthtodiameter 14 to 23 mill length 7 meters rod millball mill circuits diagrams of mill circuits image 13582

May 15 2015 1 rod milling a rod mill with a diameter of 244 meters inside new liners grinding wet in open circuit 2 ball milling a ball mill with a diameter of 244 meters inside new liners grinding wet in

Thanks robert i will embark on a project to determine what ball size to top up the mill i will aim at topping up with one size the ball mill discharge p80 is about 0455mm with top size material being about 475mm also wanted to find out if circulating load has any effect on my grind size

Jan 01 2020 the discharge end design of a ball mill plays an important role in discharging the desired particle sizes 15010 m and the percentage of recirculating load

Maxfeeding sizemm discharge size mm outputth motor power kw 3638 15 20 0075089 0652 185 36 27 20 0075089 1135 22 36 3 25 007506 1548 30 36 35 25 007404 165 37 324 5 25 007404 1658 55 297 75 25 007404 25 75 27 11 25 007404 36 110 28 12 25 007404 356 130 254 11 25 007404 410 130 254 15

Ball mill design a survey of australian processing plants revealed a maximum ball mill diameter of 524 meters and length of 884 meters morrell 1996 autogenous mills range up to 12 meters in diameter the lengthtodiameter ratios in the previous table are for normal applications for primary grinding the ratio could vary between 11and 181

View a reverse engineered patterson ball mill cylinder available cylinder sizes range from laboratory mills to 12 in diameter discharge features for discharge of the product on wet grinding processes we offer our standard media retention grate along with an adequate size discharge valve for discharge of the product on dry grinding processes we offer our dry media retention grate and housing ball mill loading guide download product sheet request a quote design

Nov 18 2008 basic principle ball mill is generally used to grind material 14 inch and finer down to the particle size of 20 to 75 microns to achieve a reasonable efficiency with ball mills they must be operated in a closed system

Jun 23 2020 if a mill has available power conversion of the discharge arrangement from overflow to grate can be beneficial in allowing increased throughput or a finer product size conversely if the mill does not have available power then it is still possible to install a grate discharge and to draw the same power by using a lower ball charge

The ball mill is a tumbling mill that uses steel balls as the grinding media the length of the cylindrical shell is usually 115 times the shell diameter figure 811 the feed can be dry with less than 3 moisture to minimize ball coating or slurry containing 2040 water by weight

In comparison the power intensity of a ball mill is about 20 kwm3the highfigure 5 component size distributions of mount isa mines tower mill feed and discharge bulk pbzn rghr con particle size mirons 56789 20 30 40 5010 percentage passing 20 30 40 60 80 90 10 100 pb in feed gangue in feed pb in discharge

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