Final answer:
William Kelly conceived the same idea as the Bessemer process in Pittsburgh, where Andrew Carnegie later founded the Carnegie Steel Factory, dominating the steel industry due to the city's strategic location and utilization of vertical integration.
Step-by-step explanation:
In 1847, William Kelly, independent of Bessemer, conceived the same idea in Pittsburgh, USA. Pittsburgh was paramount to the steel industry, largely due to the industrial advantages offered by its location at the confluence of the Monongahela and Allegheny Rivers which formed the Ohio River.
Andrew Carnegie, after observing the Bessemer process in Britain, brought this innovative steel-production method to Pittsburgh, where he founded the Carnegie Steel Factory. His use of vertical integration, whereby he owned all parts of the production and distribution process, enabled him to dominate the U.S. steel market. A Scottish immigrant, Carnegie utilized his experiences and the technologies he observed to finance the creation of a modern steel mill, which ultimately produced more steel than the entire British Empire at the turn of the century.