Short-distance conveying of loose, non-abrasive materials (e.g., garbage, grain, food waste): which conveyor is most suitable?

Introduction / Context:
For localized transfers inside plants—like under-hopper discharge, short horizontal lifts, or inclined feeds—compact conveyors with simple containment are preferred for loose, non-abrasive materials.

Given Data / Assumptions:

• Materials: garbage, grain, food wastes (non-abrasive, moderate moisture).
• Distance: short (typically < 30 m per flight).

Concept / Approach:
Screw conveyors are enclosed, compact, and cost-effective for short runs. They meter and convey simultaneously, tolerate variable feed, and prevent spillage and dusting. Belts excel at long distances; flights/drag conveyors are for heavier, abrasive, or sticky service.

Step-by-Step Solution:
Match application (short, enclosed, metered) → screw conveyor.Eliminate alternatives based on distance and material abrasiveness.Select “Screw conveyor.”

Verification / Alternative check:
Facility layouts in grain and food plants commonly use screws under bins, mixers, and for short transfers.

Why Other Options Are Wrong:
Belt: better for long runs.Flight/drag: robust but higher wear and power for this gentle service.

Common Pitfalls:
Using screws for very long distances (inefficient) or very abrasive solids (rapid wear).

Final Answer:
Screw conveyor