Crushing, Screening & Conveying

Crushing, Screening & Conveying

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Started by Netsie
How does the size setting of secondary and tertiary crushers is related.we do have Hp 200 and Hp300 cone crushers, for a better throughput how do I have to calibrate them related to each other and the feed material which has size of 80mm and should b...
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Last commented on by Netsie
Helpful!
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355
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Started by alitorabi1369
Hello good timeI am the hpgr operator of a pelletizing plant. Thank you for answering some of my questions One of the major problems in HPGR is the concentration of the concentrate on the rollers. What do you think is the best solution to eliminate...
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Last replied to by mohammad1364
Hello, if you want do maintenance on tyres, for example replacing a broken or chipped stud or you want to measure gap between tyres to reset the static gap, use high pressure water and wash away that ...
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Started by pandamanishankar
I am working on budgeting the costs for an copper processing plant and need to estimate potential power consumption of jaw crusher? I have work index, F80 and P80 of the ore. Any guidance is really appreciated?
Last replied to by Alex Doll
The specific energy consumption at the motor input can be predicted using Bond's equation: E = 10 × CWi × (P80–½ - F80–½) where CWi is your work index, F80 is the 80% passing size of the fee...
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Started by shayne
Am doing an internship at a mine with a comminution plant, how can I practically apply the laws of comminution to predict energy consumption on a 3 stamp mill .
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Last replied to by AmyCarter
I guess it's better to go deeper into the theme and check some specialized resources. But the question sounds a little bit weird now
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463
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Started by balan@ce
Hello, The shaft in question is very similar to the Metso GP100S and the shaft has broken as in the attached picture. The vitals were good and the crusher was beginning to give some odd sounds before the operator found that the shaft was broken. Any...
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Last replied to by
1. The structure design is unreasonable. If the interference between the main shaft and the moving cone is too large, there is no unloading groove, and the transition fillet is too small, the main sha...
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390
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Started by LordPage
Please tell me if you know the year, make and manufacturer of this. Ball Mill located in Creede, Colorado USA. This Ball Mill was driven by a Steam Engine (missing). Do you know what Steam Engine would have been used to drive this Ball Mill?Many th...
Last replied to by David
Hi, no idea as to make or year of this antique. Best I could do is if you gave me the mill's dimensions, I could tell you the Horse Power needed to run it. In any case, where would you get a steam en...
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Started by Nikita Gupta
We are using SAG and ball mills for grinding zinc lead ore. I want to know about the possibility of replacing the same with High Pressure Grinding Rolls (HPGR)s. Would the replacement require any changes in the plant design. What would be the feasibi...
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Last replied to by Peter Murphy
Depends on the application and ore characteristics. Sizing and selection of appropriate equipment for throughput and recirculation loads to be considered. Full evaluation of project aims or objective...
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Started by Dachmann
Hi, I am new to the field of mining. Recently I looked into the process of liberation and concentration. Many papers suggest that HPGR and Stirred Mills are a better alternative to SAG and Ball mills in terms of energy efficiency and mineral liberat...
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Last commented on by Peter Murphy
Yes agreed, however depends on the application and ore characteristics. Note, HPGR is a crusher used to crush ore, not to mill ore. Therefore HPGR are part of the crushing plant and incorporated only...
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Started by Nikita Gupta
I would like to understand why do companies use SAG mills instead of Rod mills for grinding these days? Apart from the alleviation of need for secondary and tertiary crushers, is there any other reason for inclination towards the installation of SAG ...
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Last commented on by Peter Murphy
Surely its got to do with the feed size and product reduction size required? SAG mills are used predominantly with feed material with a larger max lump sizes (from primary crushing plant typically i...
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Started by redcastle
I have a small gold project that I am looking at conducting a heap leach trial of around 5,000 tons, I'm looking at the most cost effective way to do the crushing with regards to mobile plant hire as I think outright purchase is unsuitable at this st...
Last commented on by SmartDog
All clays do not expand on wetting, so it is important to determine the type of clay involved. And those clays that do expand do it upon wetting, whether it is a cyanide solution or just regular wate...
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533
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Started by BrantT
Hi.  I'm re-configuring a circuit and i need to install a DSM screen prior to a Knelson though i am not sure how to size it?  Are there any rule of thumbs or models out there to determine the size and angle of the DSM based on incoming flowrate, % ...
Last commented on by SmartDog
I also do consulting, or some say insulting. Either works if I get paid.
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435
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Started by Eder Figueiredo
Dear Friends, I working on a solution for repairing the spider tapered internal bore of our 60” x 89” primary gyratory crusher , as it has loosed its fit interference due excessive wear and can not hold the spider bushing. The results are freque...
Last commented on by Eder Figueiredo
Thanks my friend. I really appreciate your comments.
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504
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Started by Mark Pulley
Hi,our project is a pilot plant for a Detrital Ore concentrator pilot plant. Feed 600 metric TPH Max size 12mm Screen size 1mm After the screen, the +1mm -12mm material goes through a cylclone and is then screened again.my query is... Can the sc...
Last commented on by SmartDog
What kind of details are you looking for? Trommels. scrubbers, or what?
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492
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Started by Jorge Quintanilla
Hello Everyone.i am envolving in a new expansion project en Bolivia. There was a discussion about foundation of crusher equipments, traditionally We use a concrete foundations. But i worked in one plant with steel foundation and we had a big vibratio...
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Last commented on by Jorge Quintanilla
I really appreciate the information, it was very helpful  
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Started by Reactor
We are looking for expertise in the best grade of steel to use for the internals of a pump to transport a slurry with the following characteristics: Particle size is typically 100 mesh / 150 microns Mohs hardness between 3.5 to 4 Solids content ...
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Last replied to by Reactor
Thanks AshKot1. The device we manufacture is not a pump, however, we need to handle the slurry that is delivered by a pump. I'll work on getting the input pressure from the feed pump and the discharge...
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Started by Sarah
Hello, I have a question about coal crusher. Why do we choose impact and roll crusher on coal? Why can't we choose cone crusher? Please help
Last replied to by AshKot1
So, I believe that the sizing and specification for any metallurgical crusher is based on simple drop test of spherical object on representative size of sample, like x grams of sample. And then the h...
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Started by mhasanmtqn
Hello, i want to ask about trommel screen, i had a project to design a trommel screen, but i so confused about the principal to make a trommel screen design, i dont find a principal on internet, if anyone have a book/pdf about that, please share the ...
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Last replied to by carman
The first item to understand is a   Trommel Screen is at least 5 times or more less efficient than a vibrating screen. I would suggest you do a area size calculation and see how much area you would ...
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Started by KWENYU
what are the effects of feeding a jaw crusher with material that contains too much fines?
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Last replied to by
When the feed particle size is too large to cause serious damage to the equipment, whether soft or medium hardness, it will cause different damage to the equipment. Therefore, the feed particle size i...
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688
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Started by PMD
Hello everyone, I'm currently preparing for a repair job on an old Allis Chalmers crusher from the 50's of which I have no real information on. I've included a photo of the wooden boards I refer to. Replacing parts is all well and good, we have tho...
Last replied to by SmartDog
In all probability they are a combination of shim and vibration isolators.  If you decide to remove them you will probably need to jack up the crusher and put large shims under it.  You will also ne...
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453
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Started by Chromst
Hi all,Is it possible to change the closed side setting of a DDC sizer whilst it is operating? Are the roller and breaker bar positions fixed?
Last replied to by SmartDog
It is never a good idea to try and adjust any equipment while it is operating.  This can cause major failures and also safety issues.  You should always have the equipment shut down cleaned out and ...
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709
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Started by kwmcb
Greetings, I'm researching sand mining in Morgan County, WV, USA.  In the pre-1930 pulverizing plant I saw the piece of equipment in the attached photo.  Can anyone identify the device to aid me in my research. Thanks,  Kent
Last replied to by SmartDog
Probably a horizontal hammer mill from the looks.
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762
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Started by MSKabir
I am new in the field of mining and extractive metallurgy. I am looking into calculating/measuring total media wear inside semi-autogenous mills. From reading research papers, I came to know that primarily three wear mechanisms are in play namely: (a...
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Last commented on by MSKabir
Thank you so much for the feedback
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Started by RIfkhan
Hi  I am working in a quartz processing plant.  We have a VSI and after the sieve the output is with 1-10mm -50% and
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Last replied to by Todd H
Do you have the VSI in closed circuit with a screen?  If so, change the top screen aperture to a finer size to increase the circulating load around the VSI - this will reduce over reduction.  You ca...
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Started by Ranjan
I wish to know about selection criteria of roller screen and wobbler feeder. What are the relative advantage or disadvantage of both these equipment ?
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Started by BillXiao
Hello Friends there, To maximize the MP 1000 power draw for the tertiary crusher circuit, we try to look at the feeder speed and cavity level to control the power draw. Accurate cavity level measurement is critical for choke feeding the crusher. at ...
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Last replied to by Todd H
Adding to Craig's post - I have seen the use of variable speed for crushers to maximize choke feeding.  The speed of the crusher changes in relation to the crusher level.  It is a bit of an investme...
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626
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Started by Chapman Quarry
Hello I am looking to find the eccentric speed + stroke of the Symons 3ft, 4 1/4ft, 6ft and 7ftXD cones for a comparison for a customer against the newer style cone crushers. Would anyone have this information in old technical sheets? Thanks Rodg...
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Started by HotelBravo
HelloI am helping a alluvial mine in South America with their transformation to mercury free mining. They have an input of 208t/h of relatively fine particles (-0.25 inch particles make 55% of the total initial weight, -10 Mesh [2mm] particle...
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Last replied to by Mike R
You may have solved these problems by now. If not then.... You have a screening and sizing problem, but you did not say what was being done now for those issues, and how. Gradual financial changes as...
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Started by Laurence Jannetjies
Good afternoon  Is there a site where I can get free samples of crusher plant modeling. Ie crusher,screens and conveyors   
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Last replied to by Jorge
Follow the link below,  https://www.vecteezy.com/free-vector/crusher
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Started by Solaris1987
Hello Dear I work in an iron concentrator plant and in our process and grinding stage, we use a tramp iron for removing of iron scraps such as rods, broken balls before HPGR mill feed which mounted on belt conveyor. The tramp iron is activated by a...
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Last replied to by christian2020
Please gentlmen,best Metal detector(s) to distinguish & remove silver scrap from poor mix silver gold ore screened ?
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Started by Chromst
Hi everyone,I need to find the throughput (in tph) of a primary jaw crusher that is fed by a Grizzly screen O/S. There is a throughput recorded for the grizzly screen feeding belt but how can I find the cutpoint of the grizzly screen? Would it be bes...
Last replied to by SmartDog
You start asking about the crusher throughput, and then talk about the grizzly cut point. Are you looking for the cut point of the screen in size or tonnage?  For the size measure the opening size an...
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679
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Started by happie
Hi everyone, we have a quarry which is to have two products at the same time since they are all highly needed, aggregate for railway construction and aggregates for road, tall building, and houses. could you please recommend the best crusher/s for t...
Last replied to by SmartDog
Start here: https://www.mclanahan.com/products/modular-wash-plants and here: https://www.kpijci.com/equipment/washing-and-classifying/complete-systems/ and here: https://www.mccloskeywashing.com/...
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710
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Started by braster22
Hi everyone! Do you know anything about coal sampling devices? https://patents.google.com/patent/US5413004A/en This sampler contains a horizontal shaft hammer mill. But is it possible to change it to a vertical shaft hammer mill (0,5 meters rotor ...
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2143
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Started by Bob_T
I have an old Union Iron Works jaw crusher that we're trying to get back into service.   It came with a 3 phase 15 HP electric motor and we're not sure which direction the crusher flywheel should rotate.   Looking at the crusher from the side, wi...
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Last replied to by Bob_T
Thank you both for your replies, they were very helpful.
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988
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Started by gdwright
Good day, Hi, i would like to know the appropriate way of dealing with the used polyurathane screen panels as a waste material.
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Last replied to by Peter J
It depends on your location as to whether they have facilities. If you have large enough quantities you may want to look at "Plastics markets" which looks at recycling across North America https://ww...
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Started by vaheedghassemy
hello friends  do you know how i can calculate and design the output capacity for a jaw crusher? thanks a lot 
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Last replied to by ECD40
The best thing is to contact the jaw crusher manufacturers with the information on the application.  Try Metso and FL Smidth.

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