溶剂置换干燥是将颗粒样品分别浸泡在乙醇，甲醇，异丙醇，环己烷和丙酮中7

Solvent replacement drying is to immerse the particle sample in ethanol, methanol, isopropanol, cyclohexane and acetone for 7 days. The solution is changed every 2 hours on the first day and then every 24 hours. The volume ratio of the solution to the solid It is 20:1. After soaking for 7 days, the test piece is taken out of the solution, the surface solution is wiped dry, and the vacuum drying is continued for 7 days. The dried sample is used for MIP test. The drying process at this time is called the first drying (FD).

Solvent replacement drying is to soak particle samples in ethanol, methanol, isopropyl alcohol, thyroid and acetone for 7 days, the first day every 2 hours to replace the solution, after every 24 hours to replace, the volume ratio of the solution to solids is 20:1. After 7 days of immersion, the test piece was taken out of the solution, dry surface solution, continue to vacuum dry 7 days, dry samples for M testing. The drying process at this time is called first drying (FD).

Solvent displacement drying is to soak the granular samples in ethanol, methanol, isopropanol, cyclohexane and acetone for 7 days. The solution is changed every 2 hours on the first day, and then every 24 hours. The volume ratio of solution to solid is 20:1. After 7 days of soaking, the samples are taken out of the solution, dried the surface solution, and then vacuum dried for 7 days. The dried samples are used for MIP test. The drying process is called first drying (FD).<br>