Primary Tin Ore Gravity Separation Solutions

Stage 1: Crushing & Closed-Circuit Screening

Raw vein tin ore is processed through a Primary Jaw Crusher and a Secondary Cone Crusher. A Vibrating Screen creates a closed loop, ensuring only material properly sized (typically -20mm) advances to the mill. This strict screening avoids unnecessary over-crushing of the brittle tin crystals.

Stage 2: Stage Grinding & Classification

The crushed ore enters a Ball Mill operating in a closed circuit with a Spiral Classifier or Hydrocyclone. This Tin Ore Milling Circuit is carefully calibrated to achieve precise mineral liberation while strictly controlling the grinding fineness to minimize "sliming" (the creation of ultra-fine mud).

Stage 3: Gravity Roughing (Early Recovery)

Liberated tin must be extracted immediately. The classified coarse/medium fractions (+0.5mm) are fed into Mineral Jigs to instantly capture the heavy coarse tin and discard massive volumes of barren tailing rock. The finer fractions (-2mm) are routed to Spiral Chutes for high-capacity pre-concentration.

Stage 4: Precision Gravity Cleaning

The rough tin concentrates are channeled to 6-S Shaking Tables. The shaking table is the ultimate purification device in a Tin Gravity Separation Plant, utilizing an asymmetrical reciprocating motion to precisely separate pure tin concentrate, middlings (for re-grinding), and final tailings.

Stage 5: Magnetic Separation (Iron Impurity Removal)

Because primary tin ore is frequently intergrown with magnetic iron minerals (like magnetite or hematite), gravity alone cannot achieve top-tier purity. The table concentrate is dried and processed through a Three-Disc Magnetic Separator. This specialized equipment strips away the magnetic iron, pushing the final tin concentrate grade to a highly lucrative 65%-72%.

Q1: Why is Cassiterite "over-grinding" (sliming) such a major problem?

A: Cassiterite crystals are extremely brittle compared to the surrounding quartz or host rock. If kept in a ball mill for too long, the tin shatters into microscopic dust (slimes under 0.01mm). Gravity concentrators rely on mass and weight to separate minerals; if the tin is ground to dust, it floats away with the waste water, resulting in massive metal loss.

Q2: How does your flowsheet prevent tin sliming?

A: We utilize an engineering principle called "stage grinding and early recovery." Instead of grinding all the rock to a fine powder at once, we grind it slightly, classify it, and immediately run it through a Mineral Jig. The jig safely extracts the liberated coarse tin before it can be sent back into the mill to be smashed into dust.

Q3: Why do I need Magnetic Separation in a Gravity Tin Plant?

A: Tin itself is not magnetic. However, in hard rock deposits, tin is frequently intergrown with dense iron minerals (like magnetite). Because iron and tin both have high specific gravities, gravity tables cannot fully separate them. By drying the heavy sand and passing it through a high-intensity magnetic separator, we easily pull the iron out, upgrading the tin concentrate to a premium 65%+ commercial grade.

Complete EPC Mining Solutions (Engineering, Procurement, Construction)

GravityMineral is your trusted partner for turnkey EPC Tin Mining Solutions. We provide end-to-end support to ensure your mine reaches maximum profitability:

• Ore Testing & Custom Design: In-house laboratory testing to design a "One Mine, One Flowsheet" strategy tailored specifically to your deposit.
• Manufacturing & Supply: We manufacture the complete suite of highly durable gravity and magnetic processing equipment.
• Commissioning & Training: Our engineers deploy to your global site to handle installation, fine-tune recovery rates, and train your local operators.