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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Acid Drainage treatment with limestone (9 replies)

4 years ago
(unknown) 4 years ago

Does anyone has information about acid mine drainage neutralization using limestone? The lab recommended lab tests? Information’s about column design? I would appreciate your help.

4 years ago
Obergruppenfuhrer 4 years ago

Here is a paper that I read some time ago hosted on the USGS website. It should be a start for you

Victor Bergman
4 years ago
Victor Bergman 4 years ago
4 years ago
(unknown) 4 years ago

If you want to repeat what thousands of people did before you, you can conduct another test. The pH will not increase above ca. 7.5 – 8 and it will take about 8 – 14 hours until you get the final pH. Always the same results without statistically significant differences. I will send you about 150 references which you can use to come up with your results. Also look to the "integrated limestone process".

4 years ago
Gruppen 4 years ago

Previous comment suggests that limestone treatment of AMD could well be standardized, taking profit of other well-accepted methods (BC and ISO on testing, see also GARD guide). However, one of the most important points is water monitoring, upstream and downstream. Not only pH but also conductivity/salinity, suspended matter (or turbidity) and the most critical metals/metalloids...

Helena Russell
4 years ago
Helena Russell 4 years ago

I have run membrane systems on AMD at pH 1-5 for 30 years. You want to run the membrane at low pH when iron, aluminum and other sparingly soluble metals (pH 7>) are still in solution. The membrane concentrate is then supersaturated and easily precipitates with much less lime than if one simply limed the feed (50 to 90% less lime depending upon the amount of co-precipitation that takes place.

4 years ago
(unknown) 4 years ago

Is the purpose of your question to develop some sort of study such as column tests or is it to design and build a real passive system to treat mine drainage?

4 years ago
Oberfuhrer 4 years ago

I can send you a rough presentation for a preliminary idea run a quick test and then went on to do some with math for limestone addition.

Maya Rothman
4 years ago
Maya Rothman 4 years ago

Yes send me some details of the analyses, volumes, goals resource recovery (copper) then discharge or reuse of membrane permeate.

4 years ago
(unknown) 4 years ago

Limestone is not the magic bullet that a lot of people think it is for passive treatment of acid drainage due to the potential of sulfate armoring. Are you looking at a passive or active system? There was a good paper on active systems using lime and limestone last week at the MEND conference.

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