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5
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1587
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Started by anjanisail
Based on test work I have designed a flow sheet for the Beneficiation of Hemetitic Iron ore. I have selected Ball mill for the grinding of rejects coming from Jig for further recovery of iron values from WHIMS. Optimum mesh of grind is 0.15 mm . From...
Based on test work I have designed a flow sheet for the Beneficiation of Hemetitic Iron ore. I have selected Ball mill for the grinding of rejects coming from Jig for further recovery of iron values from WHIMS. Optimum mesh of grind is 0.15 mm . From...
4
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1691
VIEWS
Started by epiphane
good evening friends, I need your help, I'm looking for a way to increase the life of the SAG liners. someone can help me find a solution to that. what study can I lead?
good evening friends, I need your help, I'm looking for a way to increase the life of the SAG liners. someone can help me find a solution to that. what study can I lead?
Last replied to by Shivam_Nigam
Hello Epiphane, were you able to get the info requested above for the guys.It will be important to know the Size of the Mill and especially the Liner Type with its present Wear Life. There are options...
Hello Epiphane, were you able to get the info requested above for the guys.It will be important to know the Size of the Mill and especially the Liner Type with its present Wear Life. There are options...
7
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4113
VIEWS
Started by oguzgunes
Hi all, I am wondering about the time of grinding in ball mills. How can I calculate the retention time? Which parameters should be considered? Thanks in advance..
Hi all, I am wondering about the time of grinding in ball mills. How can I calculate the retention time? Which parameters should be considered? Thanks in advance..
Last commented on by Mike
You did not mention the rate you are adding more media. This also should be accounted for. see: https://www.911metallurgist.com/grinding/charging-grinding-media/
You did not mention the rate you are adding more media. This also should be accounted for. see: https://www.911metallurgist.com/grinding/charging-grinding-media/
2
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1885
VIEWS
Started by SAKAR
which rubber is excellent for ball mill rubber liners? what should be physical properties and qualities of ball mill rubber liners?
which rubber is excellent for ball mill rubber liners? what should be physical properties and qualities of ball mill rubber liners?
Last replied to by Sandip Trivedi
Nice information to make a best formulation. But SBR and PBR have a poor tear properties compare to NR, PBR has own reliance and abrasion properties good, mill where high tear and cut resistant requir...
Nice information to make a best formulation. But SBR and PBR have a poor tear properties compare to NR, PBR has own reliance and abrasion properties good, mill where high tear and cut resistant requir...
3
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1979
VIEWS
Started by Jaime Jacob
Hello I am begining to study the modelling of the comminutions systems and I would like to have some examples of determinations of the breakage and selection matrix. Anyone have some documents that explain this? Thank you very much..!!
Hello I am begining to study the modelling of the comminutions systems and I would like to have some examples of determinations of the breakage and selection matrix. Anyone have some documents that explain this? Thank you very much..!!
1
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1499
VIEWS
Started by srinu1234
Dear all, Have a good day! I am trying to determine ball mill work index for a very soft . If I follow bonds procedure to do experiment, not able to determine. The following is the data of ore sample. F80% = 2300mic Mesh of grind =300mic -300mi...
Dear all, Have a good day! I am trying to determine ball mill work index for a very soft . If I follow bonds procedure to do experiment, not able to determine. The following is the data of ore sample. F80% = 2300mic Mesh of grind =300mic -300mi...
Last replied to by Alex Doll
The objective of the Bond work index tumbling tests is to arrive at a steady-state where the amount of ground material is constant between the stages. One way to short-circuit the early instability ...
The objective of the Bond work index tumbling tests is to arrive at a steady-state where the amount of ground material is constant between the stages. One way to short-circuit the early instability ...
1
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1337
VIEWS
Started by Sayed9
Hi we have replaced the girth gear of a ball mill used for coke grinding, and we have completed gear alignment. our procedure to use four holes of the gear fixing bolt , drill these hole to increase the diameter and then for reaming out . The purpo...
Hi we have replaced the girth gear of a ball mill used for coke grinding, and we have completed gear alignment. our procedure to use four holes of the gear fixing bolt , drill these hole to increase the diameter and then for reaming out . The purpo...
6
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1416
VIEWS
Started by Hermann
Hi All, we want to mill a relatively soft galena in limestone ore to prepare it for gravity concentration. Flotation is not possible at the site. The ore is easily liberated, so a grind down to about p80 of 1mm is ok, to feed it to spirals and shak...
Hi All, we want to mill a relatively soft galena in limestone ore to prepare it for gravity concentration. Flotation is not possible at the site. The ore is easily liberated, so a grind down to about p80 of 1mm is ok, to feed it to spirals and shak...
1
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1646
VIEWS
Started by Charlie
Could you recommend a suitable calculation for ball mill charge volume using the chord length of the ball charge? We are currently using the calculation for distance between charge to top of mill. We would like to use the chord length method as well,...
Could you recommend a suitable calculation for ball mill charge volume using the chord length of the ball charge? We are currently using the calculation for distance between charge to top of mill. We would like to use the chord length method as well,...
4
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3447
VIEWS
Started by samuel82
Whats your opinion for TPL (turbo pulp lifter) for SAG mill? It seems that by adding a TPL could help increase energy efficiency and reach the SAG mill maximum capacity.
Whats your opinion for TPL (turbo pulp lifter) for SAG mill? It seems that by adding a TPL could help increase energy efficiency and reach the SAG mill maximum capacity.
Last replied to by David
Samuel, here is an excerpt of a paper by https://www.linkedin.com/in/david-royston-02765013/ Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of ...
Samuel, here is an excerpt of a paper by https://www.linkedin.com/in/david-royston-02765013/ Modern Semi-Autogenous (SAG) Grinding Mills can be up to 12 metres in diameter (absorbing up to 20 MW of ...
4
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2735
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Started by FarshidBsr
Hello Dear Friends, We are working in a plant with single stage grinding using three parallel wet three compartment ball mill. Each ball mill operates in a close circuit with Classifier. The fineness of ball mill product is OK so the circulating loa...
Hello Dear Friends, We are working in a plant with single stage grinding using three parallel wet three compartment ball mill. Each ball mill operates in a close circuit with Classifier. The fineness of ball mill product is OK so the circulating loa...
Last commented on by FarshidBsr
There are 3 ball mills in our plant so we should differentiate between ball mill power and total power of ball mills which is sum of each ball mills power. By increasing throughput the mill power will...
There are 3 ball mills in our plant so we should differentiate between ball mill power and total power of ball mills which is sum of each ball mills power. By increasing throughput the mill power will...
2
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1527
VIEWS
Started by Guelb22
Hi All, The shell liner of the SAG mill wear in different rate depend on the position of the liner ring. Do we replace the half shell liner due to only wearing discharge end ring ? how we can manage that to replace the worn ones in time without repl...
Hi All, The shell liner of the SAG mill wear in different rate depend on the position of the liner ring. Do we replace the half shell liner due to only wearing discharge end ring ? how we can manage that to replace the worn ones in time without repl...
Last replied to by David
What you are trying to do is not something I have ever done or seen. We change either the complete shell or half (in a High/Low setup). We do not change half the DE or FE. You need to review your ...
What you are trying to do is not something I have ever done or seen. We change either the complete shell or half (in a High/Low setup). We do not change half the DE or FE. You need to review your ...
3
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1727
VIEWS
Started by hulk
hi,how are you What are the reasons and solution for Sag mill bolt breakage? Tell us about effect of changing liner geometry type of material and metallurgical operation conditions on bolt breakage. thanks
hi,how are you What are the reasons and solution for Sag mill bolt breakage? Tell us about effect of changing liner geometry type of material and metallurgical operation conditions on bolt breakage. thanks
4
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1673
VIEWS
Started by mokhtaraazami
Hi everybody I work in a iron ore beneficiation plant in Iran. in this plant the feed size is less than 10 mm which first enter to the HPGR (in open circuit) and its product size is less than 6 mm which goes to the open circuit ball mill. my questi...
Hi everybody I work in a iron ore beneficiation plant in Iran. in this plant the feed size is less than 10 mm which first enter to the HPGR (in open circuit) and its product size is less than 6 mm which goes to the open circuit ball mill. my questi...
Last replied to by raghdmuhi
https://youtu.be/Fr9XHChvKIY
https://youtu.be/Fr9XHChvKIY
15
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1956
VIEWS
Started by Devon2017
Hello, I am a Placer gold miner in Desperate need of professional answers about an old, large abandoned Gold Ball Mill I found, and contents that were left behind. The answers I need are mainly how the recovery methods are completed once run ...
Hello, I am a Placer gold miner in Desperate need of professional answers about an old, large abandoned Gold Ball Mill I found, and contents that were left behind. The answers I need are mainly how the recovery methods are completed once run ...
3
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2107
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Started by Simba marshy
how can I reduce the the tonnes of rejected by a grate discharge ball mill
how can I reduce the the tonnes of rejected by a grate discharge ball mill
4
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1758
VIEWS
Started by sajjadaghazadeh
Hello Dear Friends, I hope all of you are doing great. I do have a question related to ball mill liner types. We are using a ball mill with diameter 3m and length 4.5 m in our plant. The ore is Magnetite with low amount of hematite. Gangue minera...
Hello Dear Friends, I hope all of you are doing great. I do have a question related to ball mill liner types. We are using a ball mill with diameter 3m and length 4.5 m in our plant. The ore is Magnetite with low amount of hematite. Gangue minera...
Last commented on by sajjadaghazadeh
Hi sure; Ball mill 1: 700kw with current working amper 1000 A average. Product size D80:45 micron. Critical Speed 75-80%. Ore work index 12kwh/t. Solid percent 70-80%. Ball mill charge 40 and 60 mm. N...
Hi sure; Ball mill 1: 700kw with current working amper 1000 A average. Product size D80:45 micron. Critical Speed 75-80%. Ore work index 12kwh/t. Solid percent 70-80%. Ball mill charge 40 and 60 mm. N...
Modification of Ball Charge Regime of wet ball Mill and hydrocyclone dimensions to achieve lower K80
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1908
VIEWS
Started by Solaris1987
Hello In our iron concentrator plant we use a wet ball mill for grinding of fresh feed. It operates in a close circle with hydrocyclones. The overall data of ball mill and hydrocyclones are following: Ball mill: F80: 4 mm Diameter: 5.5 m Lengt...
Hello In our iron concentrator plant we use a wet ball mill for grinding of fresh feed. It operates in a close circle with hydrocyclones. The overall data of ball mill and hydrocyclones are following: Ball mill: F80: 4 mm Diameter: 5.5 m Lengt...
2
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1687
VIEWS
Started by banyechan
what reasons for the increasing ball consumption after converting my overflow mill to grate discharge mill?
what reasons for the increasing ball consumption after converting my overflow mill to grate discharge mill?
5
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1523
VIEWS
Started by facostam
Hello 911MetallurgistI am currently working on a concentration plant, specifically on the liner change of the ball mills. I have to determine the difference in wear behavior between mineral (copper sulfide)-steel and steel-steel, all this according t...
Hello 911MetallurgistI am currently working on a concentration plant, specifically on the liner change of the ball mills. I have to determine the difference in wear behavior between mineral (copper sulfide)-steel and steel-steel, all this according t...
2
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1958
VIEWS
Started by Hauptsturm
How to increase the density when too much material is reporting to the cyclone underflow? Is it the right practice to increase the density when too much material is reporting to the cyclone underflow for a diamond processing plant? Cyclone pressures...
How to increase the density when too much material is reporting to the cyclone underflow? Is it the right practice to increase the density when too much material is reporting to the cyclone underflow for a diamond processing plant? Cyclone pressures...
Last replied to by
I presume we are talking heavy media cyclones here? If so then you should increase the medium density to reject a higher proportion of light minerals to the overflow. But as with everything there is a...
I presume we are talking heavy media cyclones here? If so then you should increase the medium density to reject a higher proportion of light minerals to the overflow. But as with everything there is a...
2
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1315
VIEWS
Started by courio
Hello friendsWe have a problem to solve and a conclusion that I do not think is the reason.MOLINO BALLS DOMINION (4X72metros D by 6.4metros L) 2300KwThe mill is supported by a pair of hydrostatic bearing journals (2159 mm diameter x 483 mm wide), equ...
Hello friendsWe have a problem to solve and a conclusion that I do not think is the reason.MOLINO BALLS DOMINION (4X72metros D by 6.4metros L) 2300KwThe mill is supported by a pair of hydrostatic bearing journals (2159 mm diameter x 483 mm wide), equ...
1
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2361
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Started by richardh
Hi I am trying to build up a library of papers on the function of a hydrocyclone in a closed ball mill circuit and not as a means 'of doing any grinding'. I am often faced with the question "We have a grind of 'A' micron in our ball mill circuits b...
Hi I am trying to build up a library of papers on the function of a hydrocyclone in a closed ball mill circuit and not as a means 'of doing any grinding'. I am often faced with the question "We have a grind of 'A' micron in our ball mill circuits b...
3
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1625
VIEWS
Started by nyala89
I need some help. We need to mill ocher as fine as possible. To date we used an outdated Raymond mill. The company bought a small ball mill about 20 years ago and we would like to use it in our process. Do you think that with the ball mill, we would ...
I need some help. We need to mill ocher as fine as possible. To date we used an outdated Raymond mill. The company bought a small ball mill about 20 years ago and we would like to use it in our process. Do you think that with the ball mill, we would ...
1
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1848
VIEWS
Started by dasun
My plant has a pulverise machine (3-5t/h). It's like as VSI machine. Are there any methods to select suitable input particle size to increase the percentage of yield without increasing the RPM of rotor? Because, when check the samples of pulverise ou...
My plant has a pulverise machine (3-5t/h). It's like as VSI machine. Are there any methods to select suitable input particle size to increase the percentage of yield without increasing the RPM of rotor? Because, when check the samples of pulverise ou...
5
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2204
VIEWS
Started by jovanifirebird
hi guys. i am working at a small scale mining industry. they have been operating at about 80t/h feed to ball mill. the cyclones operates at about 85MPa feed pressure. 2 cyclones run at a time. however they don't maintain water balance .we all know ...
hi guys. i am working at a small scale mining industry. they have been operating at about 80t/h feed to ball mill. the cyclones operates at about 85MPa feed pressure. 2 cyclones run at a time. however they don't maintain water balance .we all know ...
Last commented on by jovanifirebird
Thanks for the suggestion ashutosh. But I dont think u understand the problem. My cyclone feed percent is 55%. But that works out when feed is 90t/h. If feed goes down to 40 t/h , you cant do the corr...
Thanks for the suggestion ashutosh. But I dont think u understand the problem. My cyclone feed percent is 55%. But that works out when feed is 90t/h. If feed goes down to 40 t/h , you cant do the corr...
2
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1773
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Started by Jean Rasczak
Hi, A lot of this is just theorizing. We will have to try the ore out to know what sort of grind we really need. But, that said, there are several potential issues. Zinc, according to the initial feasibility test work needs to be reground in order...
Hi, A lot of this is just theorizing. We will have to try the ore out to know what sort of grind we really need. But, that said, there are several potential issues. Zinc, according to the initial feasibility test work needs to be reground in order...
Last replied to by Dave Tahija
If high pH of the cleaner tails is the only issue preventing sending them to a flotation/tin stage, why not lower the pH with carbon dioxide?
If high pH of the cleaner tails is the only issue preventing sending them to a flotation/tin stage, why not lower the pH with carbon dioxide?
2
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1398
VIEWS
Started by babygenius76
I have a West African project where we use a pendulum roller mill along with classifier to dry-grind high purity (95% to 98%) calcite to d50 10 micron with a relatively steep PSD curve. The top feed size into the mill is 5000 microns (5 mm) because...
I have a West African project where we use a pendulum roller mill along with classifier to dry-grind high purity (95% to 98%) calcite to d50 10 micron with a relatively steep PSD curve. The top feed size into the mill is 5000 microns (5 mm) because...
Last commented on by babygenius76
Robert, Yes, the grinding from 5000 to 10 microns is highly energy intensive. As you see above, I have even tried a 2 stage grinding where in the first stage, I reduced it from 5000 to 74 micron. In ...
Robert, Yes, the grinding from 5000 to 10 microns is highly energy intensive. As you see above, I have even tried a 2 stage grinding where in the first stage, I reduced it from 5000 to 74 micron. In ...
3
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1727
VIEWS
Started by polyroly
Good Evening Everyone. First time posting in the forum here! We just recently relined our SAG mill and we have had some operational issues since starting back up. We have had a massive amount of filings ending up in the discharge magnet and I examin...
Good Evening Everyone. First time posting in the forum here! We just recently relined our SAG mill and we have had some operational issues since starting back up. We have had a massive amount of filings ending up in the discharge magnet and I examin...
3
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6892
VIEWS
Started by Okay
Hello Everyone, I am dealing with the calculation of Bond Work Index. The flowsheet is attached. I have calculated primary ball mill bond index but for the calculation of second ball mill bond index I got trouble. In a bond energy equation, where ...
Hello Everyone, I am dealing with the calculation of Bond Work Index. The flowsheet is attached. I have calculated primary ball mill bond index but for the calculation of second ball mill bond index I got trouble. In a bond energy equation, where ...
Last replied to by Alex Doll
F80 is the feed size to the primary BM; T80 is the transfer size (prim mill product size), P80 is the final product (cyclone overflow) The F80 is the feed to the primary ball mill. The T80 (is t...
F80 is the feed size to the primary BM; T80 is the transfer size (prim mill product size), P80 is the final product (cyclone overflow) The F80 is the feed to the primary ball mill. The T80 (is t...
2
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1871
VIEWS
Started by Nicolau Ismael Lazaro
Hi all. I am new in mining industry and I have two task to do and I would like your help: Perform Reflux Classifier Capacity Test and; Optimize the Reflux Classifier Performance Can the anyone give some insight on how to do this tasks. Thank y...
Hi all. I am new in mining industry and I have two task to do and I would like your help: Perform Reflux Classifier Capacity Test and; Optimize the Reflux Classifier Performance Can the anyone give some insight on how to do this tasks. Thank y...
Last replied to by Nicolau Ismael Lazaro
Thank you Rahil. I would like to get optimum parameter (bed density, fluidization and feed flow rate) for the reflux classifier processing -1.0 +0.25mm particles from the deslime screens to get produc...
Thank you Rahil. I would like to get optimum parameter (bed density, fluidization and feed flow rate) for the reflux classifier processing -1.0 +0.25mm particles from the deslime screens to get produc...
4
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2296
VIEWS
Started by williamcavalier
Assuming a new technology allowed economical and rapid 1 micron grinding - What material would you grind to achieve high recovery rates and take advantage of a lower processing cost of fine material? Asking the same question in a different way - Wha...
Assuming a new technology allowed economical and rapid 1 micron grinding - What material would you grind to achieve high recovery rates and take advantage of a lower processing cost of fine material? Asking the same question in a different way - Wha...
Last replied to by KPvanderWielen
For most applications 1 micron is too fine, you'll slime the feed. Industrial minerals do go this fine though for making products for specific applications, and as said before gold leaching may benefi...
For most applications 1 micron is too fine, you'll slime the feed. Industrial minerals do go this fine though for making products for specific applications, and as said before gold leaching may benefi...
7
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2619
VIEWS
Started by Hamid72
Hello everybody In our plant sometimes freezing of the charge happens for the ball mill and if we cant solve this issue after three times the ball mill will be stopped for 5 hours. I want to know why this issue (the load cementing) happen? And what ...
Hello everybody In our plant sometimes freezing of the charge happens for the ball mill and if we cant solve this issue after three times the ball mill will be stopped for 5 hours. I want to know why this issue (the load cementing) happen? And what ...
noted, Thank you