At the time of filming in 1974, this plant had been manufacturing steel nonstop for 102 years using the Bessemer process. [Sir Henry Bessemer]’s method for turning pig iron into steel was a ...

The expansion of the railroads and manufacturing that followed the Industrial Revolution created great demand for key materials like iron and steel. In this environment, William Kelly devised a new ...

particularly for steel production. Traditionally, steel is produced by heating iron ore in large furnaces, with the addition of coal by-products to transform it into pig iron. This process ...