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"Bessemer Converting Vessel. Bessemer Steel is steel made direct from pig iron by a process patented in 1855, and subsequently, by Henry Bessemer. This process, as now worked, is briefly as follows: The pig iron is remelted in a cupola, and poured into a large vessel called a converter, lined with fire bricks and capable of revolving upon horizontal trunnions." -Vaughan, 1906

Bessemer Converting Vessel

"Bessemer Converting Vessel. Bessemer Steel is steel made direct from pig iron by a process patented…