Chemical and Mechanical Factors on Phosphorus Dissolution Behavior from P-concentrated Slag

Since it has been urgently demanded to secure the secondary phosphorus resources domestically in addition establishment of a stable supplying path phosphate ore from overseas, recovery steelmaking slags is attracting attention. The phosphorus-enriched slag obtained by dephosphorizing high hot metal, which was prepared reduction conventional slag, thought be useful as raw resource. It reported our previous paper that can effectively separated P-enriched citric acid leaching method. In this study, effects concentration solution, solution temperature, slag/solution mass ratio, and composition on dissolution behavior were additively investigated. A significantly promoted increasing solution. However, even if temperature increased during leaching, speed ratio did not change. With each element increased, while their ratios decreased. Furthermore, suppressed case with low CaO P2O5 concentrations. Appropriate conditions for various factors affecting discussed.