Process Overview
Tin ore has a significantly higher density than associated gangue minerals, making gravity separation the primary method for tin extraction. However, due to the presence of iron oxide minerals such as magnetite and hematite, magnetic separation is required to remove these impurities effectively. In addition, flotation is applied to separate sulfide minerals such as lead, zinc, and antimony from the tin concentrate.
Applicable Minerals
This tin ore processing plant is suitable for various tin-bearing minerals, including:
Teallite
Franckeite
Cylindrite
Canfieldite
Black Boron Tin
Malaya Garnet
Varlamoffite
Schoenfliesite
Other associated tin oxide/sulfide minerals
Process Description
Crushing and Screening
Raw tin ore is crushed to 20 mm and separated into two size fractions: (20–4 mm) and (4–0 mm) for further processing.
01
Preselecting
The 20–4 mm ore enters a heavy-medium cyclone for pre-concentration, followed by rod milling. Jigging removes tailings above 2 mm; the remaining product (≤2 mm) flows to shaking tables.
02
Bulk Flotation
Concentrates from jig and shaking tables undergo bulk flotation. Tailings are further processed on shaking tables to produce qualified tin concentrate.
03
Separating Flotation
Bulk flotation concentrate is finely ground, then separated into lead-antimony and zinc concentrates through selective flotation.
04
Gravity Separation
The pulp is processed through a Φ300 mm hydrocyclone, followed by Φ125 mm and Φ75 mm cyclone groups to remove fine mud. The sand product proceeds to thickening, desulfurization flotation, and finally cassiterite flotation for high-grade tin recovery.
05
Process Advantages
Highly efficient gravity separation due to density differences.
Magnetic separation removes iron oxide impurities effectively.
Flotation ensures high recovery of associated lead, zinc, and antimony minerals.
Comprehensive multi-stage process increases tin recovery rate and purity.
Suitable for both oxide and sulfide tin deposits.
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