Optimization of fluorine balance in the production of aluminum

摘要

The technological balance of fluorine and sodium in the electrolytic process is maintained by efficient utilization of low-modulus reclaimed cryolite, complex additions, fluorinated alumina, and combined utilization of the methods of "wet" and "dry" gas cleaning. The high efficiency of the latter method and complete recycling of valuable components back into the technological process through waste recovery makes it possible to markedly reduce losses of fluorine. Thermodynamic modeling shows that the optimal value of the cryolite ratio is determined within the framework of a solution of two problems, first, that of increasing the current efficiency of metal, and, second, decreasing harmful discharges into the environment.