离子型稀土矿二维多孔注液溶液渗流及稀土离子迁移规律研究OA

The key to ensure efficient resource recovery is to master the flow of in-situ leaching solution and migra-tion law of rare earth ions in ion-type rare earth ore.Traditional column leaching test could not observe the flow diffu-sion of solution and law migration of rare earth ion during porous injection process.Based on this,two-dimensional box leaching model was designed to carry out porous injection leaching test with MgSO4 solution of 2%mass fraction as leaching agent.The results showed that the volume of leach liquid,the quality of leach rare earth ion and the rate of leach were different in different regions,and the solution infiltration mode changes from free infiltration to intersection infiltration.The area directly below the injection hole has the largest volume of leached liquid,followed by the inter-section area and the boundary area.The leaching rate of rare earth ions in the area directly below the injection hole was the highest,followed by the intersection area and the lowest in the boundary area.By analyzing the average leached rare earth ion mass in each area of the ore body,it was found that rare earth ion mass migrates from the injection cen-ter to both sides with the solution.The leached rare earth ion mass was the largest in the intersection area of the hole,followed by the boundary area of the ore body,and the leached rare earth ion mass was the least in the area directly below the injection hole.The research results can provide reference for the optimization of in-situ leaching injection method.