Weba Chute Systems asserts that the success of its custom engineered transfer chute begins with understanding how a specific material will behave at the transfer point - and then applying both scientific principles and practical experience to achieve the optimal design.

According to Weba Chute Systems technical manager Dewald Tintinger the company’s focus on the science of flow, combined with hands-on experience, sets it apart in the field of transfer point engineering.

“Whether handling sticky manganese ore, cohesive clay or abrasive lumpy run-of-mine feed, it is vital to base chute design on a detailed understanding of how materials flow, compact and interact with liners and geometry,” he says. “Every material behaves differently, so we can’t apply a one-size-fits-all rule.”

The process starts with bulk flow analysis, often conducted in the laboratory using a representative fine fraction - typically the minus 4 mm portion of the material. This sample is tested across different moisture contents, pressures and flow angles to determine flowability under realistic plant conditions.

“This lab work tells you part of the story but minus 4 mm material might only make up 20% to 30% of the actual particle size distribution,” Tintinger notes. “The real challenge is integrating that data with the larger lumpier portion of the material mix.”

Drawing on insights from more than 5 000 chute installations worldwide, the company says it has developed robust design parameters that capture how mixed-size materials behave collectively.

The company also makes use of discrete element modelling technology, which, Tintinger, emphasises, is not a design tool.

“Our core methodology remains rooted in what we call the continuum method - a traditional physics-based design approach that has been the backbone of the company’s success,” Tintinger explains.

He affirms that the company’s blend of science and craftsmanship - incorporating fundamental engineering principles and modern tools - continues to deliver transfer chutes that outperform standard solutions across commodities.