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siderurgy

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siderurgy

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_____structures_____ ____carbon___ ___strongest___ _____industry____ _______empire state ___nickel_____ ____properties_____

Steel  is an essential part of our everyday life .   It takes part of the of the buildings where we work and live , the home appliances that we use ,    the cars that we drive , bridges , boats , planes , trains etc . without it , modern day life would look a lot different .   Last year the world steel produced eighteen hundred million tons of steel ,   the equivalent of over 5100 _______ building's . So how is possible to  transform  rocks in the ground into one of the structural materials in the world .   
  The steel making process starts with the processing of rocks that have been extracted  from a mine containing  _____iron_____ . These rocks are crushed ( trituradas ) and ore  iron is extracted using magnetic media . This iron ore is mixed with and melted in a big furnace ( HORNO DE FUNDICIÓN ) . The melted steel will be treated in different ways to obtain ingots , sheets or bars .   Often additives are added to the melted steel like chromium , or titanium to obtain different alloys of the steel with different .