A Raymond Mill (also known as a Raymond Roller Mill) is commonly used for grinding non-flammable and non-explosive materials with Mohs hardness below 7 and humidity less than 6%. Below is a simplified diagram and explanation of its key components:
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Raymond Mill Diagram & Key Components
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1. Feeding Device (Vibrating Feeder)
└──> Feeds raw material into the grinding chamber.
2. Grinding Rollers & Ring
├── Grinding Rollers (3-5 rollers) – Rotate to crush and grind material.
└── Grinding Ring – Stationary; material is ground between rollers and ring.
3. Classifier (Impeller or Whizzer)
└── Controls fineness by separating fine powder from coarse particles.
4. Cyclone Collector
└── Collects fine powder after air classification.
5. Bag Filter/Dust Collector
└── Captures remaining fine particles for environmental safety.
6. Blower (Induced Draft Fan)
└── Provides airflow to carry powder through the system.
7. Main Drive Motor & Reducer
└── Powers the grinding rollers and classifier.
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Working Principle:
1. Raw material is fed into the mill via a vibrating feeder.
2. The grinding rollers press against the grinding ring, crushing the material.
3. Airflow from the blower carries fine particles to the classifier.
4. The classifier separates fine powder (product) from coarse particles (returned for regrinding).
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hed powder is collected in the cyclone and bag filter.
Applications:
– Grinding limestone, gypsum, barite, calcite, talc, marble, etc.
– Used in mining, cement, chemical industries.
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