International Battery Metals Ltd (IBATF)

[bb221]

https://www.tooeleonline.com/articles/news/us-mag-breaks-ground-on-lithium-facility/

“ Cell salt is a by-product of the process of magnesium production. Over its 50 years of operation, US Magnesium has accumulated around 1.5 million tons of cell salt that looks like stacks of dirt on US Magnesium’s property.”

So to answer your question, we are starting from solids, that will have to be dissolved into a brine, and then yes heated up to 190 degrees