The Keene Model RC-1 Rock Crusher is a popular portable impact mill designed for quickly crushing small rocks, ores, and minerals, including copper ore. However, whether it’s suitable for processing arenaceous (sandy) copper ore depends on several factors:
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Key Considerations for Processing Arenaceous Copper Ore with the RC-1
1. Material Composition
– If the copper ore is highly sandy (arenaceous), it may contain loose, unconsolidated particles that could pass through the crusher without being effectively broken down.
– The RC-1 works best on hard, brittle materials; sandy ore might not fracture efficiently under impact.
2. Moisture & Clay Content
– Sandy ores with high moisture or clay can clog the crusher or reduce efficiency.
– The RC-1 is not designed for wet processing; pre-drying may be necessary.
3. Gold vs. Copper Recovery
– The RC-1 is often used by prospectors for free-milling gold, but copper ores may require additional steps (leaching, flotation) after crushing.
– If the copper is in fine particles within sand, a classifier or sluice may help concentrate material before further processing.
4. Feed Size & Output Control
– The RC-1 accepts rocks up to ~2.5 inches and reduces them to ~60-100 mesh powder.
– For sandy material, a pre-screen might be needed to avoid overloading with fines.
Alternative Approaches
– If the ore is too sandy:
– Use a hammer mill or ball mill for better grinding of softer materials.
– Consider a spiral classifier or jig to separate sand from heavier copper minerals before crushing.
– For better recovery:
– After crushing, use acid leaching (for oxide copper) or flotation (for sulfide copper).
Bottom Line
The Keene RC-1 can crush copper-bearing rock, but its efficiency on sandy (arenaceous) ore depends on mineral hardness and liberation. If the material is too soft or fine-grained, additional classification or a different mill type may be needed.
Would you like recommendations on setting up a full processing circuit for this type of ore?