The Bell-less Top (BLT) system represents a major evolutionary leap from the traditional double-bell mechanism.
The BLT replaces the heavy, wear-prone bells with a system of lock hoppers and a rotating chute.
Its core advantage lies in providing precise, non-contact burden distribution through controlled chute rotation and tilting. This sophisticated control over material placement—coke and iron ore—allows operators to finely tune the gas flow distribution within the furnace.
This capability directly translates into improved fuel efficiency, higher productivity, and the ability to operate the blast furnace at higher top pressures, thereby securing greater operational stability and performance.