Last week, Lithium Universe Ltd (ASX:LU7) published a prefeasibility study for its planned lithium refinery at Bécancour in Quebec, indicating a strong financial framework for the project – including pre-tax net present value (NPV) of US$779 milllion, an internal rate of return (IRR) of 23.5% and payback of 3.5 years. This is based on construction of a refinery designed to produce 18,270 tonnes per year of green lithium carbonate, which will become feed for LFP batteries. The plant itself will have a small, off-the-shelf design, and will springboard from the technology, know-how and partnershi…