Weba Chute Systems has won a contract from Isdemir Steel plant for three more custom-engineered transfer points, following on from the three earlier installations.
In addition to overcoming the challenges of material degradation and excessive dust, the new chutes will be designed to address material segregation, screen presentation and screen efficiency, according to Alwin Nienaber, technical director at Weba Chute Systems.
Challenges in this particular application at the steel plant include presentation of material, as well as one of the screens experiencing a greater volume of fines than the other. The segregation of material being presented to one screen was not only responsible for the inefficiency of the screen, but also for causing extremely high wear to the screen panels.
“Presentation of material onto the screen has been addressed through the custom engineering of the screen feed chute, and this design allows the absolute control of the discharge velocity of the material. By doing this, the Weba Chute System will be able to present the material in an even spread at the feed end of the screen,” explained Nienaber. “This will ensure the efficiency of the screen and eliminate the dead zones on the screen deck.”
The Weba-engineered solution is a bifurcated chute that feeds the two separate conveyors, as well as the two sizing screens. Nienaber said that the original installation had not been able to evenly split the flow of material into two equal streams, and this resulted in the one screen seeing up to 75% more fines than the other.