How Does Gravity and Magnetic Separation Improve Zircon Sand Processing Efficiency?

When a South African client approached Dasen Mining seeking a complete processing line for zircon sand, the goal was clear — to upgrade a raw material containing 2–4 % zirconium into a final product of 65 % grade.

The customer had previously focused on other industries but recently obtained a zircon deposit. After an on‑site consultation and process discussion at Dasen Mining’s headquarters, they decided to begin laboratory testing by sending ore samples for analysis and beneficiation design.

Process Overview
Zircon sand is typically associated with ilmenite, monoaluminate, quartz, and small amounts of other heavy minerals. Efficient recovery requires a multidimensional beneficiation system using both gravity and magnetic separation followed by electrostatic sorting.

The process implemented in this case integrates the Brazilian ilmenite–monoaluminate–zircon model, known for its clean, high‑grade output.

Complete Process Flow:
Silo ➜ Conveyor ➜ Drum Screen ➜ Spiral Screen ➜ Wet Magnetic Separation ➜ Shaking Table ➜ Drying ➜ Electrostatic Separation

• • Wet Magnetic Separation: Removes magnetic minerals such as ilmenite and monoaluminate, leaving non‑magnetic heavy minerals.
  • Shaking Table: Uses gravity to separate zircon and quartz by density differences.
  • Drying: Prepares the concentrate for electrostatic classification.
  • Electrostatic Separation: Final stage where golden‑red and tin minerals are removed, producing high‑grade zircon concentrate that meets the customer’s 65 % target.

This combined approach minimizes reagent use and maximizes the purity of zircon, resulting in a stable, high‑efficiency recovery suitable for both industrial and ceramic applications.

Gravity Separation: Targets the quartz and lighter fractions for removal, ensuring the zircon concentrate remains dense and clean.
Magnetic Separation: Divides ferromagnetic from non‑magnetic minerals, improving final separation efficiency.
Electrostatic Sorting: Differentiates minerals based on conductivity, enabling precise extraction of zirconium minerals.
Process Advantages: Compact layout, low energy cost, and compatibility with multiple ore types including ilmenite and monazite.
Testing results confirmed that the selected system can easily achieve over 60–65 % zircon concentrate grade, aligning with the customer’s commercial goal.

Local Service and Magnetic Separation Support in Nigeria
Beyond project design, Dasen Mining provides robust pre‑sale and after‑sale technical support across Africa. To better serve regional clients, we established a dedicated warehouse in Jos, Nigeria, offering immediate access to spare parts and demonstration equipment.

Our Nigeria facility focuses on secondary magnetic separation technologies and is equipped with:

• • Three‑disc magnetic separators
  • Three‑roll magnetic separators
  • Double‑roll magnetic separators
  • Elevators and auxiliary handling systems

Customers can visit local projects, observe equipment in operation, and engage with engineers for on‑site consultations. This physical presence significantly reduces delivery times, enhances maintenance efficiency, and supports clients working with ilmenite, monazite, tin, and zircon ores.

Through this collaboration with the South African zircon client, Dasen Mining demonstrated how combining gravity, magnetic, and electrostatic separation can transform low‑grade zircon sand into a high‑value product that meets international standards.

From lab testing to full production, and with a growing presence in Nigeria and other African markets, Dasen Mining stands ready to deliver end‑to‑end mineral beneficiation solutions backed by over 30 years of experience in magnetic and gravity separation engineering.

For technical consultations, equipment sourcing, or project visits, contact Dasen Mining today — your reliable partner in efficient mineral upgrading.

Whatsapp:+86 133 1927 7356
Email:[email protected]