POSCO Holdings has completed the upstream process of its second brine lithium plant at the Hombre Muerto Salt Flat in Argentina, laying the groundwork for an annual production capacity of 50,000 tons of lithium hydroxide, eight years after acquiring mining rights to the site. POSCO Holdings held a completion ceremony for the upstream process on Tuesday (local time) near the salt flat, located at an altitude of 4,000 meters above sea level. The ceremony was attended by POSCO Group Chairman Chang In-hwa, POSCO Argentina President Park Hyun, Argentine presidential chief of staff Karina Milei and Korean Ambassador to Argentina Lee Chong-hwa, among others. "Since I became head of the new business division in 2014, I have personally visited sites to find salt flats suitable for lithium development. It is deeply moving to have overcome numerous challenges in the extreme environment at 4,000 meters above sea level and reach today's completion," Chang said. "We will continue to proactively secure competitive resources, turn them into production and profitability and stably supply the critical mi