Alumina produced in this process is intended for use in the metallurgical industry, specifically for the production of primary aluminum. Alumina from this unit process is refined from bauxite and is used as a key raw material in aluminum smelting operations. When utilizing this data set, reference the statistical data from the Nonferrous Metals Industry Yearbook for information on various stages of primary aluminum production. For non-statistical process data, refer to surveys of typical enterprise production processes and technical indicators. Consider the inclusion of specific pollution emission data obtained from enterprise internal statistics and relevant literature studies to ensure accurate environmental impact assessments during specific production stages.