I am not aware of the recovery rate of these specific metals, but sharing with you a few research articles which may be helpful to you:

1. Tsiliyannis, C. A. (2014). "Cyclic manufacturing: necessary and sufficient conditions and minimum rate policy for environmental enhancement under growth uncertainty." Journal of Cleaner Production 81: 16-33.

2. Xiu, F. R., Y. Y. Qi and F. S. Zhang (2015). "Leaching of Au, Ag, and Pd from waste printed circuit boards of mobile phone by iodide lixiviant after supercritical water pre-treatment." Waste Management 41: 134-141.

Based on the type of metal, the recovery can be well above 90%.

You can read these documents to get some idea about recovery of metals from waste streams:

1. High frequency eddy-current separation of metallic granules from foundry sands, e-scrap and other waste streams - Swadhin Saurabh, MS Thesis, University of Utah

https://collections.lib.utah.edu/details?id=192789

2. Eddy Current Separation of Metallic Granules from Waste Streams - Swadhin Saurabh, Raj Rajamani - University of Utah

https://books.google.com/books?id=5v0gadnyAD0C&pg=PA251&lpg=PA251&dq=high+frequency+eddy+current+separation+of+metallic+granules+from+waste+streams&source=bl&ots=XcFCqCkfGz&sig=Pjh4wupFe027DqxSIg5y5JBmDI4&hl=en&sa=X&ved=0ahUKEwjBk-bMvIjTAhVeHGMKHcBJBNEQ6AEIRzAF#v=onepage&q=high%20frequency%20eddy%20current%20separation%20of%20metallic%20granules%20from%20waste%20streams&f=false

Thesis High frequency eddy-current separation of metallic granules ...

Chapter Eddy current separation of metallic granules from waste streams

Many thanks for all your inputs. I did some further research myself and found the following valuable resources and insights I would like to share here:

EASAC (2016): Priorities for critical materials for a circular economy. Online available under: http://www.easac.eu/fileadmin/PDF_s/reports_statements/Circular_Economy/EASAC_Critical_Materials_web_complete.pdf [Accessed March 30, 2017].

Graedel T. E., Allwood J., Birat J.-P., Reck B. K., Sibley S. F., Sonnemann G., Buchert M., & Hagelüken C. (2011): Recycling rates of metals - A Status Report, a Report of the Working Group on the Global Metal Flows to the international Resource Panel. Online available under: http://www.easac.eu/fileadmin/PDF_s/reports_statements/Circular_Economy/EASAC_Critical_Materials_web_complete.pdf [Accessed March 30, 2017].

Reuter M. A., Hudson C., van Schaik A., Heiskanen K., Meskers C., & Hagelüken C. (2013): Metal Recycling: Opportunities, Limits, Infrastructure, A Report of the Working Group on the Global Metal Flows to the Inter- national Resource Panel. Online available under: https://www.wrforum.org/wp-content/uploads/2015/03/Metal-Recycling-Opportunities-Limits-Infrastructure-2013Metal_recycling.pdf [Accessed March 30, 2017].

In the latter references I found the attached graph (p. 125), which was the most comprehensive information I found about recycling efficiencies (here between a common formal system in Europe and the informal sector in India for the gold yield from printed wire boards). So the smelter does seem to be very effective in central Europe, however separation and take-back systems perform poorly. Globaly less than 1% recycling rate for many metals (i.e. Neodymium) are reported. However, for other metals, the rates are considerably higher (Iridium 25-50% and Cobalt >50%) (Graedel et al. 2011). Indicating that it highly depends on waste streams. EE-waste-streem seem to show lower recovery rates than other streams (EASAC 2016).

I have conducted some research on lithium ion battery wastes. for cobalt,lithium and nickel the recovery rate was quiet high. for example the cobalt recovery and lithium rate was above 90% and for nickel it was a bit less. i did the research under a  condition similar to industrial conditions so it i hope it helps you.