The size of manganese ore required for crushing depends on the type of crushing equipment, the desired final product size, and the processing method. Generally, manganese ore is crushed into smaller sizes to facilitate further processing (such as beneficiation or smelting). Here are typical size ranges for manganese ore crushing:
1. Primary Crushing (Coarse Crushing)
– Feed Size: Up to 1,000 mm (depending on the mine output and crusher capacity).
– Output Size: 150–300 mm (typical after jaw crusher or gyratory crusher).
2. Secondary Crushing (Intermediate Crushing)
– Feed Size: 150–300 mm.
– Output Size: 25–50 mm (typical after cone crusher or impact crusher).
3. Tertiary Crushing (Fine Crushing)
– Feed Size: 25–50 mm.
– Output Size: 5–25 mm (for further grinding or direct use in some processes).
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4. Grinding (For Beneficiation or Smelting)
– If the ore requires further liberation of manganese minerals, it may be ground to finer sizes:
– Ball mill feed: <5 mm.
– Final grind: 0.075–0.5 mm (for flotation or leaching processes).
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Factors Affecting Crushing Size Selection:
1. Ore Type & Hardness: Harder ores require more stages of crushing.
2. Downstream Processing: Smelting may require coarser material (~50 mm), while beneficiation needs finer sizes (<10 mm).
3. Crusher Type:
– Jaw crushers handle large feed sizes (~1,000 mm).
– Cone/impact crushers reduce to medium sizes (~25–50 mm).
– Hammer mills/roll crushers produce finer output (~5–10 mm).
Common Final Product Sizes for Manganese Ore:
– For direct shipping ore (DSO): ~30–80 mm.
– For sintering/pelletizing: ~6–25 mm.
– For hydrometallurgical processing: <1 mm.
Would you like recommendations for a specific crushing circuit based on your ore characteristics?