Dore is what some mines produce to send off to the refiner. Typically the ore is treated to produce a low grade gold alloy bar, what I was used to seeing was about 65% plus gold.
That's then sent off to a refiner to smelter into 99.99% or 24 carat gold bars.
That's why I find it interesting that a refiner is referenced. Refiners in Asia do take concentrate, but typically it's a lot higher grade than 1% from my experience.