Silica removal from iron ore is critical for improving product quality and smelting efficiency. Common techniques include magnetic separation, flotation, and gravity separation, often integrated into crushing-screening-grinding circuits.
Key equipment configurations:
1. Primary Jaw Crusher (Feed size: ≤1500mm, Output: 200-300mm)
2. Secondary Cone Crusher (Input: 200-300mm, Output: 30-50mm)
3. High-frequency Screen (Capacity: 50-800t/h)
| Equipment | Model Example | Key Parameters |
|---|---|---|
| Vertical Shaft Impact Crusher | VSI-1140 | Capacity: 120-180t/h, Max Feed: 50mm |
| Sand Washer | LX-915 | Water Consumption: 30-75m³/h |
| Fine Sand Recovery Unit | LZ-30 | Recovery Rate: >85% |
Q1: What’s the optimal silica content after removal?
A: Typically below 5% for blast furnace requirements.
Q2: How to prevent equipment wear in high-silica processing?
A: Use tungsten carbide liners and maintain proper feed gradation.
Location: Mbeya Region
Solution:
– Installed 3-stage crushing with VSI shaping
– Achieved silica reduction from 12% to 4.7%
– Final product yield: 650tph of iron concentrate
The system incorporates water recycling and dust control measures for environmental compliance while maintaining processing efficiency.
