MAGNESITA REFRATÁRIOS S.A.

Publicly-Held Company

CNPJ/MF (Corporate Taxpayer Registration) No. 08.684.547/0001-65 NIRE (Commercial Registration) 31.300.026.485

MINUTES OF THE BOARD OF DIRECTORS' MEETING HELD ON NOVEMBER 9th, 2017

Date, Time and Place: On November 9th, 2017, at 11 a.m., at the branch office of Magnesita Refratários

  1. ("Company"), located in the City of São Paulo, State of São Paulo, at Rua Dr. Eduardo Souza Aranha, 387, 5th floor, Vila Nova Conceição, ZIP Code 04543-121.

    Notice of the Meeting, Attendance and Agenda: The members of the Company's Board of Directors were duly summoned on November 2nd, 2017, pursuant to article 16, §1st of the Company's Bylaws. The totality of the members of the Board of Directors attended the meeting. The agenda was set out in the call notice.

    Chairman and Secretary: Chairman - Octavio Cortes Pereira Lopes

    Secretary - Livia Mariz Junqueira

    Resolutions: The following resolutions were adopted by unanimous vote of the members of the Board of Directors:

    1. To authorize these minutes to be drawn up in summary form; and

    2. To approve results of the third quarter of 2017 of the Company.

    Conclusion and Approval of the Minutes: There being no further business, the meeting was briefly adjourned while these minutes were drawn up. The meeting was again called to order, whereupon these minutes, after being read and approved, were signed by the Chairman and Secretary of the meeting and the members of the Board of Directors of the Company. Chairman: Octavio Cortes Pereira Lopes. Secretary: Livia Mariz Junqueira. Members of the Board of Directors: Octavio Cortes Pereira Lopes; Stefan Borgas; Thiago Emanuel Rodrigues; Robert Ranftler; Eduardo Guardiano Leme Gotilla; Gilmar Fava Carrara; William Cordeiro; Bernardo Guimarães Rodarte; Ronaldo de Carvalho Caselli.

    I declare that these minutes are a true copy of the original drawn up in the relevant book.

    São Paulo/SP, November 9th, 2017.

    LIVIA MARIZ JUNQUEIRA

    Secretary

    1

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