A High Gradient Magnetic Separator (HGMS) is an advanced magnetic separation technology designed to extract weakly magnetic particles or fine particles from liquids, slurries, or gases. It achieves high selectivity and efficiency by generating extremely strong magnetic field gradients (up to several Tesla) using a matrix of ferromagnetic materials (ví dụ., steel wool, expanded metal, or plates) placed in the magnetic field.

Key Features of HGMS:
1. High Magnetic Gradient:
- Uses a magnetized matrix (ví dụ., stainless steel wool) to create localized high gradients, enabling the capture of fine or weakly magnetic materials (ví dụ., oxit sắt, paramagnetic minerals).

2. Strong Background Field:
- Generated by superconducting magnets (for high fields >2T) or rare-earth permanent magnets (for lower fields).

3. Ứng dụng:
- Chế biến khoáng sản: Removal of iron impurities from kaolin, thạch anh, fenspat.
- Xử lý nước: Heavy metal removal (ví dụ., arsenic, crom).
- Tái chế: Recovery of metals from waste streams.
- Biomedical/Life Sciences: Cell sorting, protein purification.

4. Operation Modes:
- Batch Mode: Matrix is cleaned after saturation.
- Continuous Mode: Self-cleaning systems for industrial-scale use.

5. Advantages Over Conventional Magnetic Separators:
- Higher recovery of ultrafine particles (<1 ừm).
- Better selectivity for low-susceptibility materials.

Hạn chế:
- Tiêu thụ năng lượng cao (if using superconducting magnets).
- Matrix clogging in high-solid-content feeds.

Example Manufacturers:
- Eriez Magnetics
- SLon Magnetic Separator Ltd. (Trung Quốc)
- Outotec ()

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