It seems like you’re referring to a “rifle sluice box,” which is a type of equipment used in gold prospecting and placer mining. Here’s a breakdown of what it is and how it works:
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What is a Rifle Sluice Box?
A rifle sluice box is a channel-like device used to separate gold from gravel, sand, and other materials in a stream or river. It typically has:
– Rifles (or riffles) – Raised barriers or grooves along the bottom that trap heavy materials (like gold) while allowing lighter debris to wash away.
– Matting or carpet – Often placed under the riffles to help catch fine gold particles.
– Water flow – The sluice relies on flowing water to carry away waste material while retaining dense metals.
How It Works
1. Material is shoveled into the top of the sluice.
2. Water washes lighter material downstream.
3. Gold and heavy minerals settle behind the riffles due to their higher density.
4. Cleanup involves removing the trapped concentrates for further processing (panning, refining, etc.).
Types of Riffles
– Hungarian (or Hungarian-style) riffles – Angled bars that create turbulence.
– Expanded metal riffles – Provide good gold retention with less clogging.
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tting with raised riffles – Common in modern sluices.
Key Considerations for Efficiency
– Water speed – Too fast, and gold can wash out; too slow, and material won’t move properly.
– Angle/grade – Usually set at 5–10 degrees for optimal performance.
– Classifier screens – Pre-screening material improves efficiency.
Would you like recommendations on specific models or DIY designs? Or are you asking about something else related to rifle sluices? Let me know how I can help!