Dynamic Model and Experiment Research on Sulfuric Acid Heap Leaching of Uranium Mine

This document gives formatting instructions for authors preparing papers for publication in the journal. The authors must follow the instructions given in the document for the papers to be published. You can use this document as both an instruction set and as a template into which you can type your own text. The process of Sulfuric acid heap leaching for uranium mine is widely used in uranium mining and metallurgical industry in China, which includes chemical reactions, liquid membrane diffusion, solid membrane diffusion, etc. Deducing kinetics model and dynamics data will help to guide the work of uranium mine heap leaching. The process style and chemical reaction constants of sulfuric acid leaching for uranium mine are deduced by the curve relationship between the leaching rate and leaching time. Experimental results show that the leaching rate is linear with the leaching time when it is less than 60% and the leaching process is controlled by chemical reaction process. The chemical reaction leaching rate constant in this experimental data. The experimental results also show that if oxidants were not added into the heap-leaching uranium ore, only 40% of the quadrivalent uranium could be oxidized into hexavalent uranium, so the oxidants must be added to improve the oxidizing ability for greater leaching rate of uranium.