The explosion happened around 1:30 p.m. Tuesday at ATI Rowley Operations, or Allegheny Technologies Incorporated.
Tooele County Spokesman Wade Mathews said two maintenance workers, ages 53 and 38, were involved in the blast.
An employee who spoke on the condition of anonymity said the men were cleaning out a particulate filter attached to a furnace. He said the furnace separates titanium dust from the air and gets clogged. He also said the men had finished their maintenance work on the furnace and were taking off their protective gear when the explosion went off.
ATI has its own emergency response team that decontaminated the men. The men were flown to the University of Utah Burn Center with second degree burns to their upper body, arms, hands and face.
ATI opened in Tooele County in 2009.
The Occupational Safety and Health Administration confirmed they are investigating the accident. Depending on the complexity of the case, the investigation could last between 15 days to 4 months.
This is the first incident OSHA is investigating at ATI Rowley Operations. ATI opened in Tooele County in 2009.
As of Tuesday night, a University Hospital spokesperson said the men were improving and in good condition.