In the US, steel production using the Bessemer process ended in 1968 and the open hearth furnaces had stopped by 1992.
32.
It involved melting pig iron in a converter similar to that used in the Bessemer process and subjecting it to prolonged blowing.
33.
He suggested using sodium nitrate instead of air in the Bessemer process for manufacturing steel but this proved to be too expensive.
34.
The patent to the Bessemer process was granted in England in 1856 and in the United States in 1857 to William Kelly.
35.
With the invention of the Bessemer process in the mid-19th century, a new era of mass-produced steel began.
36.
Before the Bessemer process, Western Europe and the United States relied on the coke was burnt for each ton of steel produced.
37.
A determining factor was the development of new processes in producing steel ( Bessemer process ) which made possible the construction of steel fa�ades.
38.
In the Bessemer process, molten pig iron is converted to steel by blowing air through it after it was removed from the furnace.
39.
It rapidly superseded both the Bessemer process and Siemens-Martin process in Western Europe by the 1950s and in Eastern Europe by the 1980s.
40.
Though the Bessemer process was licensed in 1856, nine years of detailed planning and project management were needed before the first steel was produced.
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