Silica Sand Purification Project
Basic Project Information
| Project Index | Details |
|---|---|
| Project Name | Silica Sand Purification Project of Sortek Group |
| Location | JIangxi Province, China |
| Target Mineral | Silica Sand (Quartz Sand), key raw material for high-end glass, electronics, precision casting |
| Capacity | 3,000,000 tons/year, large-scale purification base in East China |
| Main Equipment | Sortek Series Magnetic Separators: WHIMS (1.8T), Wet Drum, Medium-Intensity |
| Technology | Multi-stage Grinding + Coarse-to-Fine Gradient Magnetic Separation (physical process) |
Processing Technology
Raw Ore & Target
Raw ore contains 0.06% Fe₂O₃ (600ppm). After 50+ tests and technical exchanges, Sortek developed a gradient magnetic separation scheme to remove weak magnetic iron impurities, targeting Fe₂O₃ < 90ppm.
Processing Steps
Step 1: Grinding - Raw ore crushed to 0-3mm, then ground to 80% passing 200 mesh (0.074mm) for impurity dissociation.
Step 2: Pre-Magnetic Separation - Ore pulp first treated by Sortek Wet Drum Magnetic Separators (0.8-1.0T, removes strong magnetic impurities) and Medium-Intensity Separators (1.2-1.4T, removes weak magnetic impurities). Removes 60-70% iron, reducing Fe₂O₃ to 150-200ppm.
Step 3: Deep Purification - Three Sortek WHIMS (1.8T) in series: 1st to <100ppm, 2nd to <90ppm, 3rd to <80ppm (0.008%), far below standard.
Process Advantages
Environmental - Pure physical process, no harmful chemicals, zero pollution
Operational - High automation, 2-3 workers/shift, 95%+ equipment availability
Resource Efficiency - Produces high/medium/low-grade silica sand, 98%+ utilization rate
Project Significance
This is China's first industrial application of Sortek 1.8T WHIMS in high-purity quartz sand production, breaking the technical bottleneck of physical ultra-low iron purification. It has been visited by 30+ enterprises/institutions, providing a model for green, efficient silica sand purification and driving industry upgrading.
Please contact for details on how to purify silica sand by magnetic separation, with the new technology of Vertical Ring High Gradient Magnetic Separator