Brazilian miner Vale is continuing with the process of divestment of two non-core assets: steelmaker Companhia Siderurgica do Pecem and bauxite miner Mineracao Rio do Norte, a company executive said April 28. “We’ve done a lot to clean up most of the non-core assets out of our portfolio and we just have two candidates left: CSP and MRN,” Gustavo Pimenta,…