Exploration of Large-Scale Application of Efficient and Clean Utilization of Low-Grade Bauxite

In recent years, the rapid development of domestic alumina industry has greatly accelerated consumption high-alumina–silica-ratio bauxite resources in China. The an efficient and clean utilization technology applicable to low-grade China is not only a requirement for resource environmental protection, but also powerful guarantee maintain sustainable China’s aluminum industry. Based on this, authors’ team proposed new process treatment ore via calcification–carbonization method from perspective equilibrium solid-phase reconstruction achieved first industrial-scale trial run basis existing laboratory research. results show that mass fraction Na2O residue can be reduced 0.95% typical diaspore bauxite, A/S 0.85 after two-time carbonization–alumina dissolution, actual dissolution rate reach 81.32%. relevant verified feasibility advantages industrial production.