What is the temperature of the briquettes? WHat are the belt specifications?

We assisted in the BHP-DRI 7 km bi-way overland conveyor and belt design. The briquette temperature specification was set at 120 deg. C.

Various belts were tested, and only one past our criteria of splice endurance strength and power demand. At the elevated temperature, the belt's core rubber lost endurance (fatigue ) strength sufficiently so that many belts were rejected. Likewise, the demand power increased at the lelvated temperature, which exceeded our design criteria, except for one belt.

CDI designed a special jig with a temperature applicator, and then tested the steel cord belt splice patterns. About 25-50% reduction in splice fatigue strength occurred with many belts.

THe BHP 7 transfer chutes degraded the briquettes, losing about 6% to breakage in transit. This can be avoided with a proper design.

The belt suffered cutting due to the briquette sharp ridges found at the briquetting machine parting lines. This can be controlled by the transfer chute design. ■

Dear Rekhawar

I have designed and supplied Belt conveyors for handling HBI . For hot as well as cold HBI.

Belt cover specifications as indicated by you seems to be in order.

The main important is proper chute design to avoid belt damage and material degradation

In one of the project where material fall on conveyor was more than 5 metres we have to provide spiral chute to avoid material Degradation.

some times you receive 3 or 4 HBi pieces joined together try to avoid these by providing grizzly over receiving station . these pieces may stuck between belt and skirt/chute and may damage belt

A R SINGH ■