Testing method for soil effective pore and its distribution parameters of ion-absorbed rare earth deposits

It is of great significance for analyzing ore leaching efficiency and mining cycle to master pore structure characteristics of ionic type rare-earth ore body.Assuming that the soil pore size distribution of ion-absorbed rare earth deposits are to logarithmic fall,using capillary model to establish calculation formula about the breakthrough curve of solution in the soil,proposed the testing method of soil effective pore size and its distribution parameters,the effective apertures of crude ore sample and screening sample about one of ionic type rare-earth ore from southern Jiangxi Province are tested by experiment.Test results show that:when the ore sample porosity is 44.4%,relative to the remolded screening sample that particle size range from 0.075 mm to 0.09 mm,the average effective aperture and effective porosity of the remolded crude ore sample are 1.14 times and 1.90 times respectively,but the pore size distribution parameters of them are basically the same.