Among common size-reduction equipment, which accepts the largest maximum feed size for primary breakage?

Introduction / Context:Choosing the first-stage comminution device depends on feed size. Primary crushers must accept run-of-mine or large quarried rocks, whereas mills and fine pulverisers require much finer feeds.

Given Data / Assumptions:

• Standard industrial equipment: jaw crusher, ball/tube mills, jet pulveriser.
• We compare maximum acceptable feed size.

Concept / Approach:Jaw crushers are primary crushers designed to accept very large feeds (hundreds of millimetres to over a metre) and reduce them to manageable secondary sizes. Ball and tube mills require much smaller feeds (typically <25 mm). Jet pulverisers handle sub-millimetre feeds for ultrafine grinding.

Step-by-Step Solution:Identify feed size domain of each device.Primary crusher domain → jaw crusher.Select jaw crusher as correct.

Verification / Alternative check:Manufacturer datasheets show jaw crushers with large gape dimensions for coarse feeds.

Why Other Options Are Wrong:Ball/Tube mills: require pre-crushed material.Jet pulveriser: only for very fine feeds; unsuitable for large lumps.

Common Pitfalls:Confusing maximum feed size with final product fineness capability.

Final Answer:Jaw crusher