Research Article
Relationship between Permeability Coefficient and Fractal Dimension of Pore in Ionic Rare Earth Magnesium Salt Leaching Ore
Table 4
Technical parameters and test parameters of low field NMR.
| Instrument parameters | Test parameters | Resonant frequency | 23.316/MHz | Pulse width P90 | 18/us | RF delay D3 | 80/us | Repeated sampling times NS | 4 |
| Coil diameter | 60/mm | Pulse width P180 | 36/μs | Sampling duration TR | 1000/ms | Scan times | 32 | Magnet strength | 0.52/T | Sampling point TD | 266424 | Analog gain RG1 | 20 | Echo interval | 0.2/ms | Magnet temperature | 32/°C | Sampling frequency SW | 200/kHz | Numerical gain RG2 | 3 | Echo count | 4000 |
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