Factory achieves a triple triumph.
The Corus sinter plant at Redcar, which employs around 40 workers, has beaten its previous annual production record.
In 2003 the plant produced 4,247,327 tonnes, smashing the previous annual output record set in 1987.
The plant, which is 26 years old, has also produced more than 90m tonnes of sinter during its lifespan.
Sinter is used to feed the enormous Corus Redcar blast furnace.
The sinter plant has also reached an all-time annual productivity of 36.3 tonnes per square meter within a 24-hour period.
Mike Steele, manufacturing manager, explained: "They have succeeded in processing very low-cost iron ores, which has included high levels of recycled waste iron and carbon units within the iron and steelmaking process."