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

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

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Started by
To get a proper flotation system, we have to filter the cleaner tailings from Tungsten concentrates after a cleaning flotation process (mainly sulfur and Arsenic). What Tailings Filtration Technologies and Systems is it better to use a drum filt...
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Last commented on by anjanisail
How Pilot test work data is taken for designing of Pressure Filter for Plant
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Started by
Relationship between thickener settling rates and pH controlled using lime CaO. Does anyone have a good technical explanation between thickener settling rates and pH?
J
Last replied to by johnclark
As mentioned by other folks, the thickener overflow typically needs to be low in suspended solids. The settling rates you mention in the thickener are typically calculated using Stoke’s equation (an...
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Am researching on Cyanide destruction/detox using hydrogen peroxide and/or ferrous sulphate and I am conducting an investigation into the use of hydrogen peroxide and ferrous sulphate for cyanide detoxification. What tests can I conduct to compare ...
Last replied to by David
More at https://www.911metallurgist.com/blog/cyanide-destruction-methods and https://www.911metallurgist.com/blog/hydrogen-peroxide-cyanide-destruction-plant
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Started by Bob Mathias
My topic is about calculations for Sizing a high rate thickener: During the last decade, various methods have been utilized in sizing a thickener such as Coe and Clevenger, Talmage and Fitch and Wilhem-Naide. Which method is superior (recommended) in...
Last replied to by David
Also see https://www.911metallurgist.com/blog/how-to-size-a-thickener
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Started by Zander Barcalow
During the last decade, various methods have been utilized in sizing a thickener such as Coe and Clevenger, Talmage and Fitch and Wilhem-Naide. Which method is superior (recommended) in sizing a high rate thickener? Which value of impact factor is re...
Last replied to by David
Also see https://www.911metallurgist.com/blog/how-to-size-a-thickener
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It’s time to change the whole way we approach major project viability assessment.In today's world there are different levels of regulation to specifically deal with environmental issues at the project level, but there appears to be a disconnection ...
Last replied to by Helena Russell
I agree with all the above comments. If there is no profit, only cost, then the management of the acidic water is avoided. At Global Aquatica we solve this by converting the waste water into cash gene...
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We have just been testing a new product that gave over 100% improvementReducing Turbidity Of Water, and I would be interested to know the best way to prove this up commercially.
Last replied to by
No problem. I'm off to WA for a few days to run some plant trials with this material, but will get some information to you to look over. The product is a very effective, but counter-intuitive rheology...
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Reports of mass fatalities as Samarco tailings dam gives way. Disaster strikes Samarco - MiningNews.net
Last replied to by Bob Mathias
Dams failing are commonly a combination of factors. An ageing structure would certainly give in at some point. Structural defects in the overall dam embankment would equally never stop huge tailings o...
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Started by
Can PEO (polyethylene oxide) be used as a thickener? I've heard that it might be used in the mining industry, such as in the dewatering process for mineral waste/tailings. How is it used?
Last replied to by
Thanks to you all for your responses and information. I may have some follow-up questions as my knowledge is limited regarding many of these applications.
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Nowadays, the application of paste thickeners has been on rise in mineral industries. The efficiency of compression in the bed is a determinant factor which affects dewatering efficiency in the paste thickeners. However, a number of parameters such a...
O
Last replied to by Obergruppenfuhrer
Two issues come to mind - maintenance and number of units, only worth considering for small tonnages. How much opex costs do you want to have on tailings? Most plants want as little as practically pos...
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1961
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Started by Oberfuhrer
Is there any suggestions regarding the chemical can be used in the scrubber when washing feldspar (size 6 mm) to remove the clay content.
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Last replied to by Standartenfurer
Have you considered an Attrition Scrubber? It liberates clay particles. No chemicals needed. Have a look at Metso Minerals website. (i.e. www.metso.com)
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Started by Jean Rasczak
What shall we do for dewatering a placer iron ore tail, which contains lots of clay? We design a thickener (2*15) m at the first stage of dewatering. The thickener underflow solid percent is 50%. It’s notable that we consider adding flocculant in t...
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Last replied to by Obersturmbann
Please tell me more about your case? It is a research project or its industrial project? I am working with clay finer than 4 microns for more than 4 years! I think for solid liquid/separation it could...
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Started by Unterstarm
I am running a project on water losses in coal wash plant and I need information on ways in which water can be lost in the wash plant of coal and in what ways we there are for minimizing the above with water loss reporting forward.
Last replied to by Gruppen
Factors that could lead to water loss include; damaged screen panels including de-watering screen, faulty level control valves which causes overflowing tanks, blockages.
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Started by Paul Morrow
What shall we do for dewatering a placer iron ore tail, which contains lots of clay? We design a thickener (2*15) m at the first stage of dewatering. The thickener underflow solid percent is 50%. It is notable that we consider adding flocculant in th...
Last replied to by David
Watch https://www.youtube.com/watch?v=iB8W-ngbxdgand https://www.youtube.com/watch?v=Bu-8GG4soyk
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Started by Helena Russell
The mine at work at has asked me what do I need to design tailing storage dam? Not sure where to start. This is a very complex issue. Perhaps start with an experienced Geotechnical Engineer. What else?I feel I should not be given the job, if i need t...
Last replied to by
I hate when all the expert's go missing on posts like this!!!! If I had been there on the 24 hours I guarantee that mess would have not reached the ATLANTIC and it did travel 500mile.Shame on the peop...
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Started by
Hi everybody, how can I predict the amount of dissolved materials in effluents coming out of a phosphate rock beneficiation plant?I need to know this information to decide if I need an effluent treatment plant or if I can release them to environment ...
Last replied to by
The simplest way to get the answer is to have a representative sample sent for geochemical analysis. This would also involve sequential leaching of the ore in water or mild acid to simulate possible a...
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Started by
Fines handling can be an ultimate nightmare, especially when your ultra-fines refuse to settle in a thickener or your cake won’t dry. Typically what are the matters of interest to a process engineer in the day to day running of a Horizontal Vacuum ...
Last replied to by
Usually, ultrafines will make a thin film on the top of the layer due to vacuum from bottom and does not allow air from atmosphere thus reduced effect of vacuum. Instead try to break the top layer wit...
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Started by
Here is what I think any decent flocculant plant and flocculant mixing systems must have but surely there can always be better 1. A reliable flocculent 'presence detecting' hopper for a 0.2m3 flocculent bin with a screw feeder, I for some uninformed ...
Last replied to by Jean Rasczak
I had had a clarometer working for 4 years and it was running straight to the floc pump. Having said that it needed weekly attention from the met tech even in a pretty benign environment (sulphide flo...
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Started by
Do you think there can be rare metals in bauxite red mud we can recover?Today it is a serious environmental problem of red mud. We need to know more about red sludge and how to make that red mud useful in a simple way.
Last replied to by
Chloride process for your red mud may be costly. You can go for producing cement form red mud.You can contact Nagpur-aluminium dept., doing such research.
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Started by
During Exploration Phase, What is the Number of Samples and Recommended Analyzes for ARD study? Most of you might know how difficult it is to obtain representative samples for the entire life of a project in order to understand the variability of...
Last replied to by Victor Bergman
Excellent comments and paper and I agree that geoostats is useful in determining sample numbers and is of course essential for generating production schedules by ARD types. However, with respect the o...
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Started by Victor Bergman
As we all know, the correct mine waste rock dump management in piles is one of the key actions to control and prevent ARD and NMD release in the environment. The costs of the required and correct controls for the new waste rock dumps (including th...
Last replied to by Helena Russell
Yes the system is as you described and yes there are potential problems - all these factors need to be taken into account, when selecting the system, passive or otherwise. In most abandoned mine setti...
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Started by Jorge
Hello, my name Jorge  VasquezI am interested about flocculant, the best for gold mineral in CCD use
Last replied to by David
Hello Jorge, we have the thickening forum here https://www.911metallurgist.com/dewatering-thickening/please be specific and clear with your question.  Flocculant selection are ore/material depende...
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Can any one tell me if you have seen a level control in thickeners based on physical properties? Sludge or mud line? Level control in thickeners helps to keep the bed level on the desired level to achieve maximum water recovery and also avoid to in...
m
Last commented on by mehrdad.zamani
rake motor torque measurement can also give idea about bed level
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Started by
Do you know an effective solution for thickening of high clay content ore? Most deposits have a considerable amount of clay minerals. Clay minerals even in small amount cause difficult dewatering. Do you know a practical solution for thickening of h...
Last replied to by JohnnyD
Colloidal clays can be very difficult to flocculate and thicken due to the very high surface charges on the clay particles. Try pre-dosing with either an inorganic coagulant (calcium, iron, magnesium ...
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Started by
Does anyone have experience with the elimination, reduction or removal and/or collection of flotation froth/foam from the top of concentrate thickeners?
Last replied to by Maya Rothman
I agree with the general theme that the best way is to prevent the froth getting to the thickener in the first place. An audit of the thickener feed flow will often show points at which the slurry is ...
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Started by JohnnyD
Can PEO (polyethylene oxide) be used as a flocculant in a thickener? I've heard that it might be used in the mining industry, such as in the dewatering process for mineral waste. How is it used? Does it increase settling rates?
Last replied to by JohnnyD
Thanks to you all for your responses and information. I was on vacation last week so I just saw them today. I may have some follow-up questions as my knowledge is limited regarding many of these appli...
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Started by
Lab Scale work - “under estimation of the thickener solids flux, often by a factor of between 10 and 20”. Following much pilot work indicated that many red herrings were still active and there was a lot of unknowns - in particular when running a...
Last replied to by
The norm has been to oversize the thickener drive for pump failures and bogged units. While I thought that this never occurred in the modern plants, I have just recently learn that it occurred twice...
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Started by Maya Rothman
The effect of feed fine fractions on paste thickeners performance. The application of paste thickeners has been on rise in mineral industries. The efficiency of compression in the bed is a determinant factor which affect dewatering efficiency in the ...
Last replied to by
2 issues come to mind - maintenance and number of units. You are right - only worth considering for small tonnages. How much opex costs do you want to have on tailings? Most plants want as little a...
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Started by
Can anyone please help me with a thickener design method? I need the procedures, or advice that should I keep in mind when I design one.
Last commented on by David
Great thickener stuff at http://joelbchristian.com/thickener/thickener.html
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Started by Maya Rothman
For an acid drainage study I need a Procedure for ARD AMD Leach Test for Assessing Water Reactivity and Leaching Potential of Mine Wastes. My project requires the assessment of the selective copper extraction from a waste material (AMD Sludge) in ...
Last replied to by Helena Russell
Regardless if you are wanting to use the method to assess the extraction process or conduct the extraction itself, you would be best to use rotary end-over-end extraction at 29+/-2 rpm which is the st...
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Effects of trace silver concentrations in mine waste on ARD productionI know about the antibacterial effects of silver on human-based microbes - this has been around for centuries. I just learned that silver appears to have the same effect on acidith...
Last replied to by
Interesting work at Michigan Tech found that silver sulfide minerals would interact with mercury cyanide, dissolving silver and precipitating mercury. http://digitalcommons.mtu.edu/cgi/viewcontent.cg...
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Started by Victor Bergman
Hello, I need input about ARD & AMD and regards to Acid Drainage treatment with limestone. Am looking for information about acid mine drainage neutralization using limestone? What oratory tests do you recommend? Any details about column design?...
Last replied to by Victor Bergman
Thank you guys!
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Is the use of Cyanide in gold production a real issue, with respect to its toxicity and environmental impact to local Authorities and gold producers? Is there enough concern out there to warrant a total shift towards a much more friendlier reagen...
Last replied to by
As a broad rule of thumb in initial costs estimates I used the cost of cyanide destruction (OPEX) as approximating the initial cost of the cyanide in the process. Again this will eventually be optimiz...
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What are the arguments and justifications that can be put forward in favor of installing a tails thickener at a gold processing plant? How is a Tailings Thickener a requirement? Am thinking along the lines of reagent consumption reduction, TSF ...
Last replied to by
I think more light must be thrown on the economic viability of this project. Let the expects be precise in their answers. A little cost savings could go a long way to improve a mine's financial regime...
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Started by
Hi, I am looking at what's the best way to re-pulp the filter cake post a plate and frame filter press? Typically flter cakes are dropped into a bunker and taken away by front end loader or onto a conveyor for stockpiling or further processing but I...
Last replied to by Maya Rothman
I AGREE the cake can run along a sluice trough , pushed along with process liquor to a filter press cake tank, add more process liquor if required to the tank. You can pump as a slurry from the tank u...

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