Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal

Dewatering: Thickening, Filtering, CCD, Water Treatment & Tailings Disposal2017-04-04T06:57:46-04:00
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Started by abhi
Is it possible to achieve the residual moisture of less than 9% in case of iron ore concentrate by adding some reagents prior to feeding to filtration unit ? If yes then ,reagents comprising which type of functional groups  should be focused to add...
Last replied to by RodC
The physical problems such as PSD will control a lot, but there are some operation points.  Make sure filtration fabric is not too tight - too much pressure drop across the fabric even though filtrat...
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Started by Millza79
To anyone with operational experience with filter presses, If you get large throughputs of flotation concentrate to filter press (due to high head grades etc) than design or typical, how do you manage it? Does the filter press become a bottleneck a...
Last replied to by Todd H
Smartdog is right - thickeners and tanks can provide a good buffer, the other option is to increase throughput by raising the moisture content.  Sometimes allowing an extra percent or two of moisture...
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Started by Darrel
Hi all, How to remove or precipitate base metal such Cu, Zn, Fe in solution tailings of cyanide destruction by INCO process. The regulation limit 2 ppm and the actual residual about 15 ppm. The head about 20ppm. Our process running with pH 10-11. ...
Last replied to by tesaygo1
Hello Darrel,   From what i know, comparing Activated carbon and zinc for gold recovery has difference. Activated carbon is selective compare to zinc which precipitate not only gold and silver, but...
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Started by Ayanda
Hi, I am trainee at a Biox plant. Can anyone please share any information on how to assist reduce colloidal gold(gold suspended in liquid). We're losing alot of gold suspended in the wash liquor at the CCDs. Has anyone faced anything like this before...
Last replied to by dauren.abralin
Does design consider loses of colloidal gold with CCD o/f's? I used to work on some BIOX plants and it seems to to me that this colloidal gold was a kind of myth. For Suzdal gold mine design criteria ...
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Started by bobo12
Good day Everyone I have conducted settling rate tests and i recorded height of the interface after every 30 seconds. So how do i calculate the overall settling rate of the flocculated material.??  Thanks Bobo        
Last replied to by SmartDog
see: https://www.911metallurgist.com/blog/settling-and-thickening-test-procedure  
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342
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Started by Hamid72
Hello everybody I have some question What is the effect of feeding pressure and slurry percent solid on final moisture?  Thanks for your attention
Last replied to by Jorge
Follow the link below to review some information, https://www.911metallurgist.com/blog/slurry-filtering-concentrate-filtration https://www.911metallurgist.com/equipment/vacuum-disk-filter/  
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Started by Teggry
Just a Bit of a Naive question. Can cyanide be washed out of slurry if put through a number of CCD's to wash it?
Last replied to by Reactor
If the CN ppm is high enough why not look at recovery versus destruction?
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373
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Started by Message
Hi met community how you doing? i hope all will be fine.Now my question or the thing that i want help is about the problems occurring in the thickener last night when i was on duty on the thickener,the thickener overflow was become dirty and it was c...
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Started by CA
We have an application that requires a 1.5" x 1" slurry pump. However, the spare pumps that we have available are a Warman 3/2 and a Flowserve 2.5/2.  We would like to try to reduce the throughput of these pumps by changing out the pulleys and/or u...
Last replied to by Todd H
As mentioned you need the pump curve to know the impact of changing speeds, it is not a linear relationship except for a small portion of the curve (typically).  You can do a couple of other things: ...
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Started by vaheedghassemy
hello friends  I want to make a vacuum drum filter but i dont know how i can calculate required surface of drum . we have slurry with 20% soil(200 micron) and flow is 14000 lit/hour the eye of filter must be 50 micron. can you help me please. tha...
Last commented on by vaheedghassemy
hello and thanks a lot
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342
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Started by smhs
I use different surfactants to improve function of filtration. The pulp i used for the tests is the output of the leach stage and has pH 2. According to the result of XRD analysis and pzc of minerals in the pulp, I predicted that the anionic surfacta...
Last replied to by SmartDog
Not trying to be sarcastic (okay a little), but the old fashioned way of doing lab testing is often the most reliable.   The are lot of things going on that theoretical work can miss, such as minera...
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596
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Started by NP
Hello,Please, I need the help about the process of using hydro-sizers/aquasizers (upward water stream classification), and how the upward water stream affect the U/F PSD. Hydro-sizers are vertical and I saw them, but aquasizer looks like thickener, b...
Last replied to by Todd H
https://www.youtube.com/watch?v=WX-IjGjUOh0 They both work on the same principle of elutriation, upward velocity of water overcomes the gravity pulling particles down.  The higher the flow the coars...
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Started by Hannes
Hello All. I need some help or insight on different cone designs between the scalloped floor and flat cone floor design. What are the pros and cons of the different designs?
Last commented on by David
Great find Rod https://www.911metallurgist.com/design-of-scalloped-bottom-thickener-tanks/
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Started by brettsylvester
We produce a sulphide copper concentrate at moistures ranging from 11-13% on average but require a moisture of no more than 10.6% for shipment (and of course would like to achieve even lower moistures in order to save on shipping costs).  At presen...
Last replied to by TonyE
10 % moisture or less is possible on your filter press given the particle size distribution. However it is imperative that your filter press is sized correctly to achieve the mass throughput rates req...
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Started by cesararaya
Hello, I introduce myself, my name is Cesar Araya and I am a student of metallurgy and I am looking for a program to simulate a thickening or clarifying process. I have been told that with metsim I can simulate, but I do not know how, and the hsc che...
Last replied to by TonyE
Hi Cesar I do free excel apps for students. Tony synthan.services@gmail.com  
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Started by Hamid72
Hello every body. In our plant we have orion pump for feeding our press filter. Their pressure rate in the feeding cycle is constant absolutely. They have only soft start have not variable speed drive to change feed pressure at feeding cycle. And we...
Last replied to by RodC
As people note, the pump should be designed for the application.  A constant flow PD pump for example is probable the worst type for a filter press.   Depending on the filter press size a flows the...
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Started by raveendra
We are operating a VBF to filter our tail thickener U/F to produce a cake of moisture 15-20% to make paste for U/G. Flocs are used in the process. We get substantial carry back during the filter press sometime even had to utilise labor permanently to...
Last replied to by RodC
Ravendra - if I understand solids are accumulating on the filter and requiring it to be cleaned?   May sure the cloth sprays on both side of the filtration fabric are clean and the water pressure is...
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694
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Started by Rofabri
I need help in selecting a mixer to mix a 20% solution of hydrated lime into water. Anyone have advice?
Last commented on by Rofabri
This not slaking lime - it is mixing already slaked/hydrated lime with water.
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643
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Started by Hamid72
Hello everybody What is the best method for cleaning and washing press filter cloth to reuse. Which solution clean better the cloth?   Our particles are mostly  chalcopyrite. Thankyou
Last replied to by pepperd
Cloth washing options depend very much on the size of the filter press / filter plates.  On 470mm or 630mm filter plates, there is likely no cloth wash system, and washing would be done manually, eit...
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Started by Robert
If so the proceedings from Paste 2017 and Paste 2015 are available, open access: https://papers.acg.uwa.edu.au/f/paste Read away and comment or question here.  
Last replied to by David
this is how little I know... Basics of Paste Backfill Systems https://www.911metallurgist.com/basics-paste-backfill-systems/
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863
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Started by knvaid
I am looking for best polymer for thickening Kaolin clay slurry without affecting its brightness value. Anyone can help us in this regard? and aslo what should be the dosage of that polymer?
Last commented on by knvaid
Respected, I have sent you a mail before 2 days but i am not getting reply. I am looking for favourable reply from your side.
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Started by Teggry
Hi I have recently been involve in commissioning a filter belt. We are getting some loud howling noises coming from it and I have pretty well ruled out drive drum slipppage. Any ideas?
Last commented on by Robert
Does it get worse as: - belt is more heavily loaded - vacuum is increased
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Started by Ashwini M
Can someone help me know how to calculate rise rate(m/hr) in thickener.
Last replied to by Paul Morrow
Read young one, read: https://www.911metallurgist.com/blog/settling-and-thickening-test-procedure https://www.911metallurgist.com/dewatering-thickening/settling-test-procedure/
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Started by sajjadaghazadeh
Can someone help me with a problem in tailing filteration? The fact is that thickener underflow was supposed to go through vacuum disk filter, however, due to highly content of clay minerals, montmorillonite etc, it constantly blocked. So we removed...
Last commented on by Donlon
agree with Rheomet about desliming, then you can get high specific throughput from filter, but what to do with the slime laden water? What is the driver? is it water scarcity or TSF constraint requiri...
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Started by Rezaghogha75
I need to clear a bogged thickener. it has no rakes and we need it to be cleared within a day or two
Last replied to by MineralFrothFlotation
Dear Reza , Is it a concrete structure or metal ? Is it recently  got jam or since long time ? If it is a concrete structure and recently got jam and diameter of the thickener is big. You may plac...
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Started by Christiaan Lourens
Hi. I want to know the design considerations for a High Rate Thickener that will be used to separate platinum solids from used mining water which forms a slurry with an inlet slurry velocity of 75 [l/s] and a solids percentage of 0.5 [%&...
Last replied to by Robert
Take a look at these 2 specific Pt mill papers: http://www.platinum.org.za/Pt2010/Papers/007-012_Vietti.pdf https://www.imwa.info/docs/imwa_2009/IMWA2009_PlintSlatter.pdf
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588
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Started by Hamid72
Hello everyone I am working on pressure filter and I need some help about: 1) what is the best and fastest method for detecting the damaged cloth? 2) what are the parameters that affect on chamber filling when feeding is in progress in other words...
Last commented on by Hamid72
thank you very very much David. is there any article about it? or any outcomes?
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Started by Robert
Seitz, R, 2016 solid-liquid separation - commentary and references - thickeners Solid-liquid separation processes including thickeners and filters are a critical component of concentrators, including concentrate and tailings handling and intermediat...
Last replied to by Christiaan Lourens
Hi Robert. I have a new question, what is the design parameters for a high rate thickener for platinum mineral processing. And also do you have a typical underflow density of a high rate thickener. ...
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Started by Subhash-Kumar-Roy
There is an issue with the CN ppm in the tailings pond, two camels got into the pond area with one camel dying from drinking the water (gate to pond was left open) it is now at 100ppm where the environmental limit is only 10ppm, we currently sprink...
Last replied to by Subhash-Kumar-Roy
Hi, we assayed a sample of the Pond solution and then add Hypochlorite and re-assay for Au content. Results from test show that there is no drop in the Au values, several doses were tested after start...
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Started by jerry andoh
i am currently thickening at 212 microns with feed density of 15% solids however, i want to regrind from 212 microns to 45 microns and thicken to about 55% solids. my major worry is the capacity of my thickener which per design is at 24t/hr but  i a...
Last commented on by MineralFrothFlotation
Dear Jerry , just trying to analyze this thickening issue from different angle . If your process is capable to settle the fines very fast , in that way you can pump the slurry very fast and obviously...
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Started by Olga
Hello collegues! Nowadays, paste thickening is very common, for instance, in China and other countries, but still not in Russia. Please advice, what are the main conditions of use, what are the key tailings characteristics that determine its use. ...
Last commented on by Olga
David!!! Thank you veru much!
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Started by Cindy ccindie1994
hello Tailings effluent from the tailings dam is brought back into the hydrometallurgical plant system and raw water from a nearby river is also used in the plant. I believe they are heavy metals and other components still present in the effluent si...
Last replied to by AJNeale
Be careful not to dismiss the river water as a potential source of your problems.  Particularly in northern climates, river water chemistry changes with the seasons.  Look at TDS levels and pH.  Al...
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Started by danny9797
Is there any previous studies or work done on the topic of tailings reprocessing by adding the previous tailings directly back into the circuit but skipping the obvious crushing? 
Last replied to by Robert
Do you have any particular orebody or ore type in mind?
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Started by anjanisail
How to calculate the evaporation loss and seepage loss of water from a Tailing Pond. If there is any thumb rule for calculation of above. Particularly I am looking for Iron ore Application. How to derive what will be the Net water which can be recycl...
Last replied to by David
https://www.911metallurgist.com/estimate-seepage-tailings-dams/ on Determining Mill Tailings Dam Seepage  
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Started by Billy
Hi all, anyone could share how to quantify cyanide loss in ponds due to UV and HCN volatilisation!? Thanks
Last replied to by David
Billy, you certainly did not read the 389 PDF nor any of the links Paul gave you. The 1st PDF mentions 'sunlight' 10 time and UV over 100x. KINETICS OF NATURAL DEGRADATION OF CYANIDE FROM GOLD MILL...

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