In comminution nomenclature, which mill type is commonly referred to as a “disintegrator” because it employs high-speed impact within a cage?

Introduction / Context:
Grinding equipment is named based on the dominant breakage mechanism and internal geometry. Disintegrators are a class of high-speed impact mills in which feed is shattered by multiple impacts within a confined rotor and stator cage assembly.

Given Data / Assumptions:

• We compare typical mills used in minerals and process industries.
• Focus on the term disintegrator used in many handbooks to denote cage mills.

Concept / Approach:
Cage mills consist of concentric cages rotating in opposite directions or a single cage against a stationary housing. Feed enters the center and is hurled outward, undergoing repeated high-energy impacts that rapidly disintegrate friable materials. This is distinct from tumbling mills where grinding media cascade under gravity.

Step-by-Step Solution:

Verification / Alternative check:
Manufacturers and classic references list cage mills under disintegrators for fertilizer, gypsum, and limestone size reduction at modest reduction ratios but high throughput.

Why Other Options Are Wrong:

Common Pitfalls:
Confusing generic “impact mill” with all high-speed mills; overlooking the distinctive cage rotor geometry.

Final Answer:
Cage mill