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1384
VIEWS
Started by Setta
Hello Guys I'm experiencing some difficulties with pyrrotite ore grinding in the SAG mill. Ore has a bond work of about 15 kWh/t. We have a pebble crusher in close circuit with the SAG mill but throughput has been an issue due to ore hardness. Bal...
Hello Guys I'm experiencing some difficulties with pyrrotite ore grinding in the SAG mill. Ore has a bond work of about 15 kWh/t. We have a pebble crusher in close circuit with the SAG mill but throughput has been an issue due to ore hardness. Bal...
1
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1680
VIEWS
Started by Hamid72
Hello everybody We have a ball mill in our plant with 2m diameter and 7 m length. I think that It is not a standard ball mill. Now I want to calculate the power draw of this ball mill and know how much must be the loaded ball in this ball mill. Can ...
Hello everybody We have a ball mill in our plant with 2m diameter and 7 m length. I think that It is not a standard ball mill. Now I want to calculate the power draw of this ball mill and know how much must be the loaded ball in this ball mill. Can ...
1
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1661
VIEWS
1
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2310
VIEWS
Started by amit_antu412
How can i control mill load with Trunnion bearing pressure ? We have faulty load cell in our SAG mill. We have previous relation trends when load cell was working fine. We need to develop relationship formula . Please assist me.
How can i control mill load with Trunnion bearing pressure ? We have faulty load cell in our SAG mill. We have previous relation trends when load cell was working fine. We need to develop relationship formula . Please assist me.
2
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2153
VIEWS
Started by Hamid72
Hello every body. We have a ball mill that works with a 380 kw motor. How can I calculate that how much ball can I add to mill maximum? Thank you
Hello every body. We have a ball mill that works with a 380 kw motor. How can I calculate that how much ball can I add to mill maximum? Thank you
Last replied to by David
go to https://redesign.911metallurgist.com/blog/ball-mill-motor-power-draw-sizing-and-design-formula enter your numbers in red until the kW Drawn by Mill at Pinion is what you need
go to https://redesign.911metallurgist.com/blog/ball-mill-motor-power-draw-sizing-and-design-formula enter your numbers in red until the kW Drawn by Mill at Pinion is what you need
1
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1319
VIEWS
Started by FarshidBsr
I need help with the size and selection of non-water cyclone(s) i can install to produce 45 t/h, 90% Bauxite - SG: 3.2 g/cm3 Feed-> Solid flowrate: 49.5 t/h (15.41 m3/h) - Slurry flowrate: 193 t/h (126.57 m3/h) - Percent solid : 25.65% w/w & ...
I need help with the size and selection of non-water cyclone(s) i can install to produce 45 t/h, 90% Bauxite - SG: 3.2 g/cm3 Feed-> Solid flowrate: 49.5 t/h (15.41 m3/h) - Slurry flowrate: 193 t/h (126.57 m3/h) - Percent solid : 25.65% w/w & ...
2
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1450
VIEWS
Started by ajm2019
We have a 4x16 ceramic lined ball mill and we are milling precipitated calcium carbonate. We are trying to to get to a gradation of D50: 3 micron and D90: 8 micron, however we are having trouble getting the gradation down. Currently we are at a D50 o...
We have a 4x16 ceramic lined ball mill and we are milling precipitated calcium carbonate. We are trying to to get to a gradation of D50: 3 micron and D90: 8 micron, however we are having trouble getting the gradation down. Currently we are at a D50 o...
1
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1246
VIEWS
Started by Azadeh
Hi dear friends which one is the best choice in grinding circuit: 1- two large ball mills 2- four small ball mills this circuit is needed for grinding the Galena and sphalerite processing. clearly I should ask that which circuit is common in min...
Hi dear friends which one is the best choice in grinding circuit: 1- two large ball mills 2- four small ball mills this circuit is needed for grinding the Galena and sphalerite processing. clearly I should ask that which circuit is common in min...
Last commented on by Azadeh
Thank you for your comment my friend.
Thank you for your comment my friend.
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1237
VIEWS
1
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1287
VIEWS
Started by Mahdi
Hi my friends We production dry Iron Cocentrate with grade 65.5% without water. One of our problems is to grinding iron ore up to 75 microns.After charging balls in the mill, larger(50&40mm) balls at the end of the mill and smaller balls(25&30mm) mi...
Hi my friends We production dry Iron Cocentrate with grade 65.5% without water. One of our problems is to grinding iron ore up to 75 microns.After charging balls in the mill, larger(50&40mm) balls at the end of the mill and smaller balls(25&30mm) mi...
Last replied to by FarshidBsr
Hey Mehdi,What is the type of mill liner? Classifying liners may help to obtain a good classification of the grinding balls if it is a single-compartment ball mill.Regards,
Hey Mehdi,What is the type of mill liner? Classifying liners may help to obtain a good classification of the grinding balls if it is a single-compartment ball mill.Regards,
2
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1403
VIEWS
Started by Teggry
Hi All, What are the options for reducing circulating load while running the mill? The tried and true method is to stop/reduce feed until the mill has time to grind out. I have heard also to increase dramatically the water to flush the mill out but...
Hi All, What are the options for reducing circulating load while running the mill? The tried and true method is to stop/reduce feed until the mill has time to grind out. I have heard also to increase dramatically the water to flush the mill out but...
Last replied to by David
Teggry, have you seen and read https://redesign.911metallurgist.com/grinding/grinding/ & https://redesign.911metallurgist.com/grinding/high-recirculating-loads-in-ball-mill-circuits/
Teggry, have you seen and read https://redesign.911metallurgist.com/grinding/grinding/ & https://redesign.911metallurgist.com/grinding/high-recirculating-loads-in-ball-mill-circuits/
1
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1104
VIEWS
Started by Rahul bhoraniya
hello all What may be reasons of breakage of ceramic ball mill bearing in capacity of 40 tons and 60 tons mill? What should be ideal bearing size in 40 tons and 60 tons ball mill?
hello all What may be reasons of breakage of ceramic ball mill bearing in capacity of 40 tons and 60 tons mill? What should be ideal bearing size in 40 tons and 60 tons ball mill?
Last commented on by Rahul bhoraniya
How to through ball mill?
How to through ball mill?
4
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1477
VIEWS
Started by Dibe
I was designing a rock salt grinding machine and and i couldn't find Bonds machine index constant for rock salt.
I was designing a rock salt grinding machine and and i couldn't find Bonds machine index constant for rock salt.
3
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2446
VIEWS
Started by Teggry
Can anybody tell me please what the difference between Flat bottom cyclones and the standard conical ones? And are they better or worse and why? In what situations would they be preferable? Thx
Can anybody tell me please what the difference between Flat bottom cyclones and the standard conical ones? And are they better or worse and why? In what situations would they be preferable? Thx
Last replied to by Mike
The most common use of flat bottom cyclones is in tailings operation, where you want to pull out the coarse sand to make the dikes.
The most common use of flat bottom cyclones is in tailings operation, where you want to pull out the coarse sand to make the dikes.
4
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1622
VIEWS
Started by eeihs
Hi, I'm a M.Eng student (control systems) and have the following question relating to hydrocyclones classifier in a mining communication circuit: What is the typical upper and lower pressure limits (in psi) for a hydrocyclone, lets say a 40 " / 1...
Hi, I'm a M.Eng student (control systems) and have the following question relating to hydrocyclones classifier in a mining communication circuit: What is the typical upper and lower pressure limits (in psi) for a hydrocyclone, lets say a 40 " / 1...
5
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1540
VIEWS
Started by Metals Guy
I am having problems with the amount of tramp metal (from grinding media) that ends up in my knelson concentrator and subsequently affecting recovery. The KC is treating SAG mill primary cyclone underflow, KC feed size 4.5mm, KC model XD 30. Whic...
I am having problems with the amount of tramp metal (from grinding media) that ends up in my knelson concentrator and subsequently affecting recovery. The KC is treating SAG mill primary cyclone underflow, KC feed size 4.5mm, KC model XD 30. Whic...
3
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2336
VIEWS
Started by Hamid2017
Dear Specialists, I'm designing a ball mill circuit to grind the crushed gold ore from F80 9.5mm to P80 130 microns, simulation showed if we use one ball mill it would be 3m x 4.3m with 800hp motor, and if I use 2 ball mills with same power then eac...
Dear Specialists, I'm designing a ball mill circuit to grind the crushed gold ore from F80 9.5mm to P80 130 microns, simulation showed if we use one ball mill it would be 3m x 4.3m with 800hp motor, and if I use 2 ball mills with same power then eac...
0
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1359
VIEWS
Started by Simba marshy
I want to to scale down a plant mill so that i can do simulations and grinding tests the plant overflow mill receives feed from only a classifier under flow at 260 t/h and has diameter 4.5m and length 6.3 m with ball charge of 33% The lab mi...
I want to to scale down a plant mill so that i can do simulations and grinding tests the plant overflow mill receives feed from only a classifier under flow at 260 t/h and has diameter 4.5m and length 6.3 m with ball charge of 33% The lab mi...
0
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1276
VIEWS
Started by Rahul bhoraniya
I have attached clip of my ball mill which is turning on lathe. Is it really best method to increase vbelt life?
I have attached clip of my ball mill which is turning on lathe. Is it really best method to increase vbelt life?
2
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2447
VIEWS
Started by isqui
Hello, I was checking the Table of Ball Mill Index. Regarding the source 1 (Bond), I checked the source and the values are different. I thought the reason was that the values reported by Bond were in short ton instead of metric ton. However, ...
Hello, I was checking the Table of Ball Mill Index. Regarding the source 1 (Bond), I checked the source and the values are different. I thought the reason was that the values reported by Bond were in short ton instead of metric ton. However, ...
1
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1302
VIEWS
Started by Rahul bhoraniya
Please tell me which design of ceramic ball mill will be more effective to grind material in less time, energy efficient and economically good and best life?
Please tell me which design of ceramic ball mill will be more effective to grind material in less time, energy efficient and economically good and best life?
Last replied to by Mike
Unfortunately your question is of the "what is the best car" variety. You have left out too many key factors, because the answer (unfortunately) is "a properly sized one". So what material are you...
Unfortunately your question is of the "what is the best car" variety. You have left out too many key factors, because the answer (unfortunately) is "a properly sized one". So what material are you...
5
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1623
VIEWS
Started by kfalus
Hello Dear Experts, I bought a new ball mill which's 900x3000 size. I am planning to grind river sand that has %60 silica in it's chemical proportion. But for me it's unnecessary to grind very fine like 600 micron or near, I just want to receive 0-3...
Hello Dear Experts, I bought a new ball mill which's 900x3000 size. I am planning to grind river sand that has %60 silica in it's chemical proportion. But for me it's unnecessary to grind very fine like 600 micron or near, I just want to receive 0-3...
Last commented on by Morteza Mousavi
Hello guys. I read comments and i think it performs unsuitably. because of mill length it can not be possible.
Hello guys. I read comments and i think it performs unsuitably. because of mill length it can not be possible.
2
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1595
VIEWS
Started by ritwik117
In a rod mill of diameter 3.8m I have three types of rod size distribution like 100 mm ,85mm ,70mm.In petcoke operation the vendor suggest that the wear rate is 52gms per ton of dry petcoke charged. I want to know the wear rate of individual rods lik...
In a rod mill of diameter 3.8m I have three types of rod size distribution like 100 mm ,85mm ,70mm.In petcoke operation the vendor suggest that the wear rate is 52gms per ton of dry petcoke charged. I want to know the wear rate of individual rods lik...
Last commented on by Mike
Probably the best examples are from time management but use the basic principles see: https://www.youtube.com/watch?v=v5ZvL4as2y0
Probably the best examples are from time management but use the basic principles see: https://www.youtube.com/watch?v=v5ZvL4as2y0
1
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1302
VIEWS
Started by Rahul bhoraniya
I have ball mill which operates on gear motor. i want to to maintain 0 degree inside temperate inside and there is 68% alumina lining inside mill. ball mill rpm is 35. how can i make 0 degree temperature inside mill?
I have ball mill which operates on gear motor. i want to to maintain 0 degree inside temperate inside and there is 68% alumina lining inside mill. ball mill rpm is 35. how can i make 0 degree temperature inside mill?
Last commented on by Rahul bhoraniya
Can i see ball mill like you have told that small insulated box around mill? Thanks todd harvey.
Can i see ball mill like you have told that small insulated box around mill? Thanks todd harvey.
3
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2121
VIEWS
Started by moayyad
i want to know we have ball mill for cement grinding the cooling water for mill bearing inter and exit in the same reading or higher in just one degree is these normal or we have problem and if we have problem what is the cause and the solution for t...
i want to know we have ball mill for cement grinding the cooling water for mill bearing inter and exit in the same reading or higher in just one degree is these normal or we have problem and if we have problem what is the cause and the solution for t...
1
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1349
VIEWS
Started by babygenius76
I have a pendulum roller mill with closed circuit air classifier that is used for the dry fine grinding (d50--10 micron/ d97--18 micron) of calcium carbonate. The grinding mechanism of the pendulum roller mill does not rely significantly, to the bes...
I have a pendulum roller mill with closed circuit air classifier that is used for the dry fine grinding (d50--10 micron/ d97--18 micron) of calcium carbonate. The grinding mechanism of the pendulum roller mill does not rely significantly, to the bes...
2
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1399
VIEWS
Started by emilyfreire
The cyclone has a amount that pass to underflow and the other to overflow, the rolling load it will be the underflow mass divided by the feed. How can I control this, only by feed pressure or inside pressure in the cyclone?
The cyclone has a amount that pass to underflow and the other to overflow, the rolling load it will be the underflow mass divided by the feed. How can I control this, only by feed pressure or inside pressure in the cyclone?
Last replied to by Alex Doll
Get yourself one of the many mathematical models of hydrocyclones that are floating around. Arterburn's model is one of the simplest, the Plitt model is more complete but also more complicated. An...
Get yourself one of the many mathematical models of hydrocyclones that are floating around. Arterburn's model is one of the simplest, the Plitt model is more complete but also more complicated. An...
4
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1773
VIEWS
Started by Peter.Li
Herbst et al. proposed a procedure for ball mill scale-up. It is based on linear relationship between selection function S (1/min) and specific power P/H S= SE×(P/H) Question 1: "H is the mass of the charge in the mill excluding the media" Doe...
Herbst et al. proposed a procedure for ball mill scale-up. It is based on linear relationship between selection function S (1/min) and specific power P/H S= SE×(P/H) Question 1: "H is the mass of the charge in the mill excluding the media" Doe...
Last replied to by emilyfreire
Peter, to determinate the power in the ball mill or in the rod mill, we can use the Rowland's equation. The equation is attached. Regards.
Peter, to determinate the power in the ball mill or in the rod mill, we can use the Rowland's equation. The equation is attached. Regards.
2
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1267
VIEWS
Started by Chama Kapambwe
Recently put inserts to reduce wear in cyclone inlet but have found re-circulating load increasing as we are now failing to operate on 5 cyclones but 6 due to high pressure. Noticed high pebble generation as well. could that be as a result of high re...
Recently put inserts to reduce wear in cyclone inlet but have found re-circulating load increasing as we are now failing to operate on 5 cyclones but 6 due to high pressure. Noticed high pebble generation as well. could that be as a result of high re...
Last replied to by Mike
The cut point of the cyclone is also determined by the cyclone dimensions and the feed pressure. Adding the inserts which caused the increase in pressure also shifted the classification cut point ca...
The cut point of the cyclone is also determined by the cyclone dimensions and the feed pressure. Adding the inserts which caused the increase in pressure also shifted the classification cut point ca...
2
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1965
VIEWS
Started by Rahul bhoraniya
Is any one have fundamentals of ceramic ball mill? is there any method or material so i can decrease grinding time of CERAMIC BALL MILL? please help me.
Is any one have fundamentals of ceramic ball mill? is there any method or material so i can decrease grinding time of CERAMIC BALL MILL? please help me.
Last commented on by Rahul bhoraniya
Its wet type. And material is slurry used for glazed body. Hello please help me to optimise size of grinding mill - Reducing ceramic ball mill design mass of MS
Its wet type. And material is slurry used for glazed body. Hello please help me to optimise size of grinding mill - Reducing ceramic ball mill design mass of MS
is there any automatic system to add balls without cutting the throughput?