Galaxy Resources has commenced production of lithium concentrate (spodumene) at its Mt Cattlin mine near Ravensthorpe.
"The production start up is on schedule and follows the successful commissioning of the crushing circuit and heavy media plant," Galaxy said in a statement to the Australian Securities Exchange.
"Over the coming weeks, spodumene throughput will be progressively ramped up until the design capacity is reached on a continuous basis."
Resource managing director Iggy Tan said the milestone was achieved on the back of an accelerated and highly successful construction program.
"Since ground was first broken at Mt Cattlin in November 2009, Galaxy has achieved first production of lithium concentrate in less than 11 months and we are very proud of this achievement," he said.
"Pleasingly, there were no lost time injuries throughout the construction, commissioning and start-up process and we are firmly focused on maintaining that record."
Mr Tan said Galaxy expects to export its first shipment of spodumene product to China in November.