Entrapped Gas Buildup Suspected as Cause of Fatal Blast at Vizag Steel Plant
A blast at Rashtriya Ispat Nigam Limited's Visakhapatnam Steel Plant on June 8 killed nine workers, with plant sources indicating that pressurized trapped oxygen in molten steel caused the explosion. The steel was moved to the next production stage before gases had sufficient time to dissolve, creating dangerous pressure pockets that ruptured the ladle's mechanical assembly. The incident highlights safety risks when production processes are rushed to meet targets, with a similar but non-fatal explosion occurring just 28 minutes earlier at the same facility.
According to plant sources cited by The Hindu, entrapped gas buildup inside boiling liquid steel caused a catastrophic explosion at the Visakhapatnam Steel Plant on June 8, killing five permanent employees and four contract workers. During steel production, pure oxygen is blasted into molten iron at 1,600°C to remove impurities, but if this process is accelerated to meet production targets, oxygen can become chemically trapped in the liquid metal, creating highly pressurized pockets. Plant officials told a three-member team of Central experts investigating the accident that the affected batch of molten steel was moved prematurely before trapped gases could dissolve. As an overhead crane transported the giant ladle container, the pressure became so intense that it violently ruptured the mechanical slide-gate assembly at the ladle's bottom, pouring tonnes of hot steel onto the shop floor. Notably, a similar explosion occurred in Steel Melt Shop-2 just 28 minutes earlier, spilling 60 tonnes of molten steel, but workers escaped because the area was being cleared when the incident occurred.
What's missing
The article relies on unnamed plant sources and does not include statements from official investigation authorities, regulatory bodies, or independent safety experts. The final investigation report's findings are not mentioned, nor are any statements from plant management or RINL leadership addressing the incident or safety protocols.
What different sources said
- The HinduCenter
Did ‘entrapped gas’ buildup trigger blast at Vizag steel plant?
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