MMX Announces the Execution of the Definitive Agreement for Sale of the Pig Iron Plant Located in Corumba RIO DE JANEIRO, BRAZIL--(Marketwire - September 8, 2009) - Further to the Material Fact dated June 23, 2009, MMX Mineração e Metálicos S.A. ("MMX" or the "Company") (BOVESPA: MMXM3),...