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Evaluation Indicators:

1. Target Mineral Content: The tantalum-niobium mineral content in the raw stone is approximately 5.28%, far exceeding the selectable grade.

2. Liberation Size: Medium to fine, mainly recoverable particle size 2-15mm

3. Liberation Characteristics:

After primary grinding to -0.074mm

After secondary grinding to -0.074mm 

4. Specific Gravity Difference: Tantalum-niobium mineral specific gravity 22-25%,

5. Individual Particles: Approximately 0.01-0.5%, mostly euhedral to subhedral tabular or columnar, occurring between quartz and feldspar grains.

6. Magnetic Characteristics:

Columbite-Tantalite: Weakly magnetic 

Content of main components（%）