Method for dynamically dissolving and preparing nitratine ore leaching solution

The invention provides a method for dynamically dissolving and preparing a nitratine ore leaching solution. The method comprises the following steps of: firstly introducing water in a reaction device, then feeding; adopting dynamic dissolution and leaching, the diameter of the fed ore particles being within 2cm, when the feeding starts, a coulter device in the reaction device beginning to run, a running speed being 1r/min, the feeding amount being 6kg/min, a total water solid mass ratio of the water inflow being kept within 1:3 to 1:4, lifting produced brine by using a self-priming pump, entering into a condensed brine barrel; extracting residues after leaching liquid, spirally exhausting from bottom of the reaction bottom, a coulter cutting when rotating, the coulter bringing the materials in a spiral outlet, the cutting amount being 6mm/min, lifting the condensed brine by using the self-priming pump, leaving diluted brine, and leaching tailings. The leaching tailings are charged simply and directly, the lea