Hebei is not stupid. They would not have negotiated a price of 95% Platt if they could get Platt - $15.
I think what will happen is this:
Hebei gets the Platt benchmark price
They may pay extra if the Fe% is high, as specified in the benchmark.
There will likely be quality deductions as outlined in the Kami technical report. Maybe it's $15/ton... who knows.
In general, deductions are based on the level of unwanted elements in the ore. Over the life of the mine, the quality of the ore will vary. By using a variable price, the smelter will pay less for bad one. Using a fixed price would be stupid... otherwise the mine could sell some really crappy ore to the buyer and they could adjust the processing circuits to output more concentrate at the expense of delivering lower quality concentrate.
2- The other question is whether or not you should trust Alderon's management, BBA, etc.
The mining world is full of people who overpromise and underdeliver. I would take the Kami technical report with a huge grain of salt considering what happened with BBA's technical report on Bloom Lake. The economics of the project may not be as good as outlined in the technical report.
There is (a small amount of) metallurgy risk. The concentrate may have lower than 65% Fe. Sometimes we don't know how well a processing plant will perform until it is actually built... look at the failure that is Vale's Goro project (e.g. acid spills, environmental damage, etc.). What happens on a bench or pilot scale doesn't necessarily extrapolate to production scale. If you want to fudge the economics of a project, you would make minor tweaks to your metallurgy assumptions. Of course, the Goro project is an extreme example where technological risk was very high because that type of processing is cutting/bleeding edge.
3- You can read skim through this book if you are masochistic:
http://www.scribd.com/doc/23475626/Wills-Mineral-Processing-TechnologyBasically...
- What happens on a bench or pilot scale doesn't necessarily extrapolate to production scale.
- Mineral processing engineers have to optimize for getting rid of unwanted elements versus not getting rid of valuable ore. Mineral processing techniques usually remove a lot of waste and a small amount of wanted ore... you have to find the right balance between getting rid of unwanted waste and throwing away less ore.
http://glennchan.wordpress.com/2012/08/08/iron-ore-miners-mainly-in-the-labrador-trough/
That's my blog by the way
