Archie Anderson suffers from Cerebral Palsy and has difficulties walking. But a £50,000 operation in St Louis Hospital, Missouri, could give him a chance.
The workers, who are being made redundant, have donated their entire social fund to three charities - one of which is Archie's charity.
The donation from the Rio Tinto workers brings his total to more than £45,000.
Marie Anderson, Archie's mother, has tweeted: "Thank you so much to the workers at Alcan for your wonderful donation to Archies Dream."
More top news
A series of special pop up performances in Newcastle will mark the start of the Battle of the Somme.
Sir Peter Bazalgette will be among leading industry figures to be honoured by Sunderland University
Over two thousand men from the North East were killed in the battle. St Nicholas’ Cathedral in Newcastle is hosting today's commemorations.