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Gerdau SA (GGB) Company Profile | . Connect to the most current information on stocks and bonds on Reuters . Finance and investing news on NYSE, Dow Jones, S&P, and Nasdaq at Reuters . Iron ore - Wikipedia Lower-grade sources of iron ore generally require beneficiation, using techniques like crushing, milling, gravity or heavy media separation, screening, and silica ... Arrium - Wikipedia Arrium was an Australian mining and materials company. The company employed nearly 10,000 workers. In April 2016 the company went into voluntary administration with ...    Read More

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