Heavy Mineral Processing Plant
The heavy mineral processing plant is specifically designed for the separation, purification, and advanced processing of high-density heavy minerals such as barite, ilmenite, zircon, and monazite. It serves as a critical intermediate link between mining operations and downstream high-end applications, with the primary objective of converting low-grade ore into high-value-added, qualified concentrate products through physical and chemical processes.
Heavy Mineral Process Plant
Introduction
About Heavy Minerals
Heavy minerals are naturally occurring, dense minerals with a specific gravity greater than 2.9 g/cm³, making them significantly heavier than common silicate minerals like quartz (2.65 g/cm³). They resist weathering and often accumulate in placer deposits (e.g., beaches, rivers).
Key Characteristics
- High Density– Sinks easily in water/air, separating from lighter minerals.
- Durability– Resistant to chemical and physical erosion.
- Economic Value– Many are critical for industrial applications.
Where Are They Found?
- Beach Sands
- River Placer Deposits
- Ancient Dune Systems
- Volcanic & Igneous Rocks
Why Are They Important?
- Economic Resources– Many heavy minerals contain critical metals like titanium (ilmenite, rutile), zirconium (zircon), rare earth elements (monazite, xenotime), and precious minerals (gold, platinum). These are essential for industries such as aerospace, electronics, and renewable energy.
- Geological Prospecting – Heavy minerals serve as indicator minerals in exploration for diamonds (e.g., garnet, chromite) and other deposits. Their resistance to weathering helps track ore sources.
- Paleoenvironmental Studies– The composition of heavy mineral suites reveals past geological processes, sediment transport routes, and ancient climate conditions.
Common Heavy Minerals & Their Uses
| Mineral | Composition | Key Uses |
| Zircon | ZrSiO₄ | Ceramics, nuclear reactors, geological dating |
| Rutile | TiO₂ | Titanium metal, white pigments, sunscreen |
| Ilmenite | FeTiO₃ | TiO₂ production, steel manufacturing |
| Magnetite | Fe₃O₄ | Iron ore, heavy concrete, MRI contrast agents |
| Garnet | Various silicates | Abrasives, waterjet cutting, jewelry |
| Monazite | (Ce,La,Y)PO₄ | Rare earth elements (REEs) for electronics |
| Gold | Au | Jewelry, electronics, financial reserves |
Mineral Processing
A heavy minerals processing plant is designed to separate and concentrate valuable heavy minerals (e.g., ilmenite, rutile, zircon, monazite, garnet, and gold) from sand or ore deposits using gravity separation, magnetic separation, electrostatic separation, and flotation methods. Typically, the process involves scrubbing and screening to remove clays and oversize material, followed by spiral concentrators or shaking tables for coarse gravity separation, and then further refined with high-intensity magnetic separators (for titanium- and iron-bearing minerals) and electrostatic separators (to isolate non-conductive minerals like zircon and rutile). The plant may also include a tailings management system to reprocess waste streams and maximize recovery efficiency. These plants are commonly used in coastal and alluvial mineral sands mining operations, with configurations customized to the deposit’s mineralogy and the desired final product grades.
Heavy Minerals Processing
The processing workflow at a heavy mineral processing plant is based on the core principles of “advanced desliming, classification and feeding, and combined purification using multiple methods.” It is suitable for various types of heavy minerals, including barite, ilmenite, zircon, and rutile. The full process is as follows, and the parameters for each stage can be flexibly adjusted based on the grade of the ore and the size of the embedded particles.
- Feed preparation: Washing, screening, and removal of clay.
- Crushing and Screening: Gradual particle size reduction. Large chunks of raw ore are crushed to the required size for processing, avoiding over-grinding while maintaining a closed-circuit screening cycle.
- Gravity separation: Spiral concentrators separate heavy minerals from lighter sand.
- Dewatering: Removal of excess water from heavy mineral concentrate.
- Drying: Drying the concentrate before dry separation.
- Magnetic separation: Separating magnetic and non-magnetic minerals.
- Electrostatic separation: Separating conductive and non-conductive minerals.
- Product recovery: Producing ilmenite, rutile, zircon, and other mineral products.
- Packaging and transport: Preparing final products for shipment.
Processing Differences Among Various Types of Heavy Minerals
- Barite-type: Primarily processed by gravity separation; for high-whiteness products, an additional magnetic separation step is required to remove iron, followed by grinding and classification to obtain finished products of different mesh sizes.
- Coastal sand deposits: No crushing is required; coarse concentration is performed directly using spiral chutes, followed by magnetic and electrostatic separation to isolate various products such as ilmenite, zircon, and rutile.
- Low-grade, difficult-to-process ores: An upfront intelligent X-ray pre-sorting process removes more than 10% of waste rock in advance, significantly reducing the load on subsequent grinding and classification operations.
250TPH Heavy Minerals Processing Plant
This setup is a 250 tph heavy mineral processing plant. It is configured with a vibrating feeder, two sets of trommel screens, hydrocyclones, spiral chutes, a fine sand recycling machine, slurry pumps, and conveyor belts.
250 TPH Heavy Mineral ProcessingPlant Flowsheet Explanation
- The truck feeds the hopper of the vibrating feeder. The vibrating feeder will feed the raw material to the two trommel screens evenly by conveyor belt.
- The trommel screens will wash and separate the sand into 0-1.5 mm and +1.5 mm material. The +1.5 mm material will be sent to a stockpile by conveyor belt.
- The 0-1.5 mm material will flow to one slurry pool. Then use the slurry pump to send the slurry to one hydrocylone group.
- The overflow of the hydrocyclone will flow to a tailings pool ( Pool T ). The underflow of the hydrocyclone group will be sent to the rougher spiral chutes.
- The concentrate of the rougher spiral chute group will flow to a concentrate pool ( Pool C1 ).
- The middle ore of the rougher spiral chute will flow to a middle concentrate pool (Pool M) . Then it will be sent to the scavenger spiral chute group to be processed.
- The tailings ore from the rougher spiral chute will flow to the tailings pool (Pool T)
- The concentrate of the scavenger spiral chute group will also flow to a concentrate pool ( Pool C1 ). Then it will be sent to the cleaner spiral chute group to be selected again.
- The middle ore of the scavenger spiral chute will flow to a middle concentrate pool (Pool M). Then it will be sent to the scavenger spiral chute group to be processed too.
- The tailings ore from the scavenger spiral chute will flow to the tailings pool (Pool T)
- The concentrate of the cleaner spiral chute group will flow to another concentrate pool (Pool C2), and then it will be sent to the re-cleaner spiral chute group. The middle ore will flow to the concentrate Pool C1. The tailings ore will flow to the middle concentrate pool M.
- The concentrate of the re-cleaner spiral chute group will flow to the third concentrate pool (Pool C3), then use the slurry pump to send it to the hydrocyclone to dewater. The underflow of the hydrocyclone is high-grade concentrate heavy mineral. The overflow will flow to the circulating pool.
- The middle of the re-cleaner spiral chute group flows to the concentrate pool C2. And the tailing of re-cleaner spiral chute group will flow the concentrate Pool C1 .
- Use the slurry pump to pump the tailings to one fine sand recycle machine for dewatering. The overflow of the hydrocyclone will flow to the circulating pool. The underflow will flow to the high-frequency screen to dewater. Then it will be transferred by conveyor belt to a stockpile.
