who invented the bessemer process

The Bessemer process was invented by Sir Henry Bessemer, an English inventor and engineer, in 1856. He developed the first economical method for mass- producing steel by blowing air through molten pig iron to remove impurities, significantly lowering the cost and enabling large-scale steel production. Although an American inventor, William Kelly, had independently conceived a similar process simultaneously, Bessemer was the first to successfully develop and commercialize it. The process revolutionized the steel industry and played a vital role in the Industrial Revolution.