For example, two OSA On-Stream-Analyzers use the following sample sequences for your slurry. In this case a PERI by FLSmith.
Analyzer A
- Heads
- Zn Feed
- Cu Rougher Scav
- Zn Rougher Scav
- Zn Cleaner Scav
- Final Tails
Analyzer B
- Cu Con
- Pb Con
- Zn Con
Sampling Time Configuration (seconds)
- Sample flush = 15
- Sample measure = 20
- Sample drain = 10
- Water flush = 10
- Water drain = 5
- Total 60 seconds
The analyzers run continuously and every second cycle there is an empty cell reference. During the empty cell check the analyzers have a water flush and the x-rays are checked using the reference wires in the empty sample cell.
You want to create a new “test” sequence. The correct how-to process to make up additional sample sequence programs:
- Go into Configuration
- Select Sampling Sequence
- Add a new Sampling List and give it a new name
- Select the new Sampling List for the List Names prompt
- Use the add feature to transfer the desired steams from the Available Streams list to the new Defined List
- Run the analyzer using the new Defined List with the New Name
- Retain the original sampling sequence as the default.
To run the analyzer with the new list, make sure it is selected in the “Active List” drop-down box on that same configuration page.
PERI has dozens of OSA in porphyry copper plants but very few poly-metallic concentrators using their technology.
By far the majority of the poly-metallic installationsare for Cu/Fe/Mo type applications:
- 2004 Apollo Gold, Jefferson City, MT (now closed)
- 2005 Kennecott Green’s Creek (now Hecla Mining), Juneau, AK
- 2006 St. Lawrence Zinc, Gouverneur, NY (now closed)
- 2008 Newmont Phoenix Mine, Battle Mountain, NV (trace elements being analyzed)
- 2010 Mount Polley Mining, Likely, BC (“also” porphyry copper)
- 2011 Nystar Myra Falls, Campbell River, BC