This document provides information about Magnesita Refratários' earnings release conference call for the first quarter of 2009. It states that the earnings release will be on May 15, 2009 after the close of the Bovespa stock exchange. It then provides details on two conference calls on May 18, 2009 - one in Portuguese at 11:00 am and one in English at 12:00 pm. It gives contact information for participants to access the calls by phone or webcast, and provides a phone number to access an audio replay of the calls until May 25, 2009.

1. FIRST QUARTER 2009 EARNINGS RELEASE
On Friday, May 15, 2009, after the closing of Bovespa's trading session.
CONFERENCE CALL IN PORTUGUESE
Monday, May 18, 2009 - 10:00 a.m. (US EDT) / 11:00 a.m. (Brasília time)
CONFERENCE CALL IN ENGLISH
Monday, May 18, 2009 - 11:00 a.m. (US EDT) / 12:00 p.m. (Brasília time)
Presentation:
Maurício Lustosa de Castro - CFO and Investor Relations Officer
As of 8:00 a.m. (US EDT), 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.
Connection numbers:
Participants calling from Brazil: (11) 4688-6301
Participants calling from other countries: 1-786-924-6977
Access code: Magnesita Refratários
Please call 5 minutes prior to the start of the call
An audio replay of the conference will be available as of 2 hours after the call, and will last through May 25, 2009,
by dialing (from Brazil, USA or other countries): (55 11) 4688-6312 - Access code 947 (NATIONAL), 832 (INTERNATIONAL)