Gemstone Alluvial Ore Beneficiation Production Line and Process Flow

Gemstone Alluvial Ore Beneficiation Production Line Solution is specialized for recovering Diamond, Ruby, Sapphire, and Garnet from placer deposits.

This solution adopts a gentle process of "Washing - Screening - Gravity Separation - Grease Selection". It ensures the integrity of gemstone crystals while achieving high recovery rates and purity levels up to 98%.

Step 1: Washing & Screening (Pre-treatment)

Goal: Remove sticky clay and classify gravel sizes.

• Washing: A Rotary Scrubber or Trommel washes the ore to release gemstones trapped in clay.
• Screening: Vibrating Screens classify material into 3 fractions: +5mm (Coarse), 2-5mm (Medium), and -2mm (Fine).

Step 2: Gravity Enrichment

Goal: Concentrate heavy gemstones and discard light gravel.

• Coarse/Medium (+2mm): Processed by Jig Machine. The pulsating water flow stratifies the bed, allowing heavy gemstones to sink for recovery.
• Fine (-2mm): Processed by Spiral Concentrator to recover small gems.

Step 3: Selection & Purification

Goal: Final separation of gemstones from heavy mineral concentrate.

• Shaking Table: Further upgrades the concentrate grade.
• Grease/Oil Separation: Specifically for Diamonds. Diamonds stick to grease while water-wetted gangue slides off.
• Optical Sorting: Uses X-ray transmission (XRT) to detect and eject gemstones from the stream (for high-value operations).

Project: African Diamond Alluvial Plant

A typical setup using our Washing + Jigging + Grease process.

• Feed Capacity: 100 t/h.
• Recovery Rate: >95% for Diamonds.
• Feature: Secure, hands-off final recovery room.

Q1: How do you prevent theft?

A: For high-value gemstones like diamonds, the final recovery stage (Grease/X-ray) is enclosed in a secure "Gold Room" or "Sort House" with restricted access and automated handling to minimize human contact.

Q2: Why use a Scrubber instead of a simple screen?

A: Gemstones are often trapped inside sticky clay balls. A simple screen won't break these open, leading to loss. A Rotary Scrubber uses tumbling action and lifters to disintegrate the clay and release the gems.

Q3: Can this plant process multiple gem types?

A: Yes. The gravity separation section (Jigs) recovers all heavy minerals, including Diamonds, Rubies, Sapphires, and Garnets simultaneously. They can be hand-sorted or optically sorted later.

Get Your Custom Gemstone Plant Design

We customize the solution based on your clay content and gemstone type.
Contact us for a secure process design and quotation.

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