Production over a single day totaled 21 tonnes of vanadium pentoxide, representing about 81 percent of the plant's phase I design capacity, Largo said. The record was reached late last week.
March will be the best month for the vanadium miner thus far since starting production last August, as output rates and recoveries have shown significant improvement.
The company will look to provide a more detailed update on production following the month's close, it said.
Largo also announced on Friday that Arias Resource Capital Management has advanced an additional C$3 million under a C$12 million convertible bridge loan the two parties agreed to earlier in March, for a total of C$6 million collected so far.
The funds are part of the vanadium miner's efforts to restructure its debt and raise more capital, after identifying additional capital expenses to be made this year, including the improvement of recoveries at its leaching system.
The company has made a series of important announcements lately, including the appointment of new chief executive officer Mark A. Smith --- who is the former CEO of Molycorp and the current executive chairman of NioCorp --- to lead Largo into a new phase of growth.
Largo is aiming to develop its Maracas Menchen mine in Brazil to phase 1 capacity by the third quarter. The Toronto-based miner is expecting 2015 production to come in at 17 million pounds of vanadium pentoxide, at a cost of US$4.15 per pound, although costs are expected to drop to US$3.21 per pound by the end of this year.
Looking out to 2016, the company has the option to complete a $32 million expansion, which would raise capacity by some 50 percent and make Maracás the largest and lowest cost vanadium mine in production.