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 parametersTest parameters
Resonant frequency23.316/MHzPulse width P9018/usRF delay D380/usRepeated sampling times NS4

Coil diameter60/mmPulse width P18036/μsSampling duration TR1000/msScan times32
Magnet strength0.52/TSampling point TD266424Analog gain RG120Echo interval0.2/ms
Magnet temperature32/°CSampling frequency SW200/kHzNumerical gain RG23Echo count4000