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
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...
Last commented on by johnclark
Do you add a flocculant prior to sending the slurry to the filtration device (using the optimum flocculant dosage for improved filtration)? Kemess Mine in BC Canada used a flocculant prior to pressure...
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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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Started by Amar
Professor gave me an Eh meter that it isn't calibrated.I want know how I can make calibrated an Eh meter.If I can make its calibrated, then I can use it.
Last replied to by
The fact that you have indicated the value is an Eh measurement rather than a redox (EMF or ORP also used interchangeably) suggests not. The EMF reading that is made in mV is a function of the type of...
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Started by Kumar Choudhry
I got questions: Do we need time to reduce metal in AMD?Is there any impact if I make just 2 settling pond and 4 settling pond in reducing TSS, Metals and pH in AMD?
Last replied to by Gruppen
When using ponds as the sole source of precipitating metal, I highly recommend a duplicate system, by which as one set of ponds fill up (thus the detention time is reduced), the other set can be used....
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Started by Bob Mathias
I am interested in obtaining synthetic pyrite for research purposes. Does anyone know of any international organizations that supply synthetic pyrite?
Last replied to by
https://www-s.nist.gov/srmors/viewTable.cfm?tableid=82NIST also has a pyrite standard for use as a control in bioleaching.
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Started by
Government regulators are beginning to ask proposed or operating mines to treat for sulphate. As I become involved in these projects, I see that this is a daunting challenge and I would like to hear from people who have experience in this area. As a...
Last replied to by Marshal Meru
Let me know if you need any help with the round-robin.
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Started by OberstGruppen
CSIRO has been active over the past few years developing and patenting an alternative to lime based on hydrotalcite precipitation.
Last replied to by OberstGruppen
Thank you for your input - much appreciated. I am aware of the use of MgOas an alternative to CaO. What differentiates the hydrotalcite (HT)-basedtechnique is the requirement to optimise the M2+ to M3...
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Started by Obergruppenfuhrer
Can anyone recommend for removal of arsenic and aluminum ion from the leachate collecting pond? I found some methods but i want to get benefit from your experiences.
Last replied to by
Maybe start from a fundamental level. Al is strongly pH-dependent and can be removed quantitatively (certainly to levels of environmental concern) by manipulating the pH. This is the standard basis fo...
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Started by Gruppen
How can I relate short term leach test results with releasing time, releasing percentage and PPE? Can I connect with whole rock analysis results and leach test results to determine releasing speed?
Last replied to by Maya Rothman
You made such an effort in replying - but QAQC has little to do with scaling and the processes are different at different scales and the interact between the scales. 
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Started by Oberfuhrer
Is there any effective and efficient method (way) to forecast or model dissolved metals in water? I have 4 times LCT results
Last replied to by Bob Mathias
The best way to "forecast" is to build a predictive geochemical model. This includes, but is not limited to: an appropriate conceptual model, a reasonable accurate water balance, an associated mass ba...
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Started by Standartenfurer
What is the track record of modern copper mines for ARD in North America? Are modern U.S. and Canadian porphyry copper mines protecting water quality?I'd like a good critique if this Earworks paper:http://www.earthworksaction.org/files/publications/P...
Last replied to by Standartenfurer
The paper does use all post-NEPA mines but selection was purposeful, not random. I disagree with EPA's current pre-emptive veto action, but Pebble is a unique project in a unique place. Does it need d...
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Started by Obersturmbann
Does anyone have experience on how flood and / or drought affect the water quality of pit lakes? I appreciate any bibliographical reference with this acid mine drainage ARD topic.
Last replied to by
On the surface aspects of AMD, I was able to monitor the effects of monsoon at a copper mine in India. The first one is a quick flush of surface waterways and exposed AMD-affected rocks and waste. It ...
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Started by Sturmbann
Any suggestions on lab equipment / infrastructure to support a mine closure teaching, mine water management, at a mine engineering educational institute?I am a member of the SENA Educational Institute in Colombia, South America. Currently we are plan...
Last replied to by Zander Barcalow
Your educational goals are admirable; I am quite envious. The Colombian government too should be applauded for its willingness to fund your group. As a passive treatment design engineer, I would recom...
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Started by Hauptsturm
We are using the terms “mine water”, “mine drainage” of “mine effluent” on a daily basis – but do we have a definition for this expression?If you know one from your country or use one, could you please post it here, as I am currently pu...
Last replied to by Bob Mathias
To confuse the issue further, as of late some differentiate mine drainage into two parts: acid mine drainage and neutral mine drainage; the former being self explanatory while the latter would be mine...
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Started by Oberstorm
I read that in the processing of metal ores HCl is employed. Does this mean that later on there is a need to remove any remnants? Do chloride removal absorbents find any application within this industry?
Last replied to by Sandeep Bisht
HCl is extremely corrosive to most materials of construction...likely dissolution in sulphuric, caustic or ammonia for base metals & cyanide for precious metals; in the mineral processing world, gener...
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Started by Unterstarm
I'm interested to learn if anyone has applied surface complexation models simulating the adsorption of metal species onto mineral surfaces, within a mine drainage project.Also if anyone has performed synchrotron-based experiments to resolve surface c...
Last replied to by Gruppen
Thanks for sharing your thesis, I will also take a look at it!
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Started by
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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Started by
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...
26
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Started by
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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Started by
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...
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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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.
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...
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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Started by
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...
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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