th4 QUARTER OF 2010

EARNINGS RELEASEOn Thursday, March 24, 2011, before the opening of BM&FBovespa's trading session.

EARNINGS RELEASE AGENDAEARNINGS RELEASE AGENDA

Doris Pompeu Brasil - Investor Relations Consultant Phone: (+55 11) 3254-6710 - doris.pompeu@globalri.com.br

Vinicius Santos Silva - IR and M&A Officer Phone: (+55 11) 3152 3239 - ri@magnesita.com.br

Further information:

Access code: Magnesita RefratáriosPlease call 5 minutes prior to the start of the call

The audio of the conference will be avaiable on Magnesita’s website as of March 28, 2011.

CONFERENCE CALL IN PORTUGUESEDate & Time:

CONFERENCE CALL IN ENGLISHDate & Time:

Presentation:

Connection numbers:

Friday, March 25, 2011 - 9:00 a.m. (US EDT) / 10:00 a.m. (Brasília time)

Friday, March 25, 2011 - 10:30 a.m. (US EDT) / 11:30 a.m. (Brasília time)

Flávio Rezende Barbosa - Financial and Investor Relations VP

As of 8:00 a.m. (US EDT), on March 25, 2011, the slide presentation will be available on the Company´s website for both viewing and downloading. Participants may have access either by phone or by webcast, whose access link will be located on

the Company's website.

Participants calling from Brazil: (+55 11) 4688-6361Participants calling from other countries: 1-786-924-6977