Alumina ọcha a gwakọtara agwakọtana alumina agba aja aja bụ ihe abụọ a na-ejikarị eme ihe. Ọtụtụ mmadụ amaghị ihe dị iche kpọmkwem n'etiti ha abụọ ma e wezụga agba ha. Ugbu a, m ga-akpọrọ gị ka ị ghọta.
Ọ bụ ezie na ihe nchacha abụọ ahụ nwere alumina, ọdịnaya alumina nke alumina ọcha a gwakọtara agwakọta karịrị 99%, ọdịnaya alumina nke alumina aja aja a gwakọtara agwakọta karịrị 95%.
Alumina ọcha a gwakọtara agwakọtaA na-esi na ntụ alumina emepụta alumina, ebe alumina agba aja aja nwere anthracite na ihe e ji ígwè mee, tinyere bauxite a na-akpọ calcined. Ụfọdụ ndị na-eji alumina ọcha a gwakọtara nke nwere ike siri ike karịa na-eji ya eme ihe, n'ihi na ọ nwere ike ịkpụcha ya nke ọma ma na-eme ka ọ dị mma, a na-ejikwa ya eme ihe maka ígwè carbon, ígwè alloy, ígwè e ji ígwè rụọ, ọla nchara siri ike, wdg. Jiri alumina ọcha a gwakọtara agwakọta gwerie ya nke ọma ma na-egbuke egbuke.
A na-eji alumina agba aja aja a gwakọtara agwakọta eme ihe n'ahịa buru ibu, a na-ejikwa ya eme ihe maka ígwè a gbanyụrụ agbanyụ, ígwè dị elu, na ígwè nwere carbon dị elu iji wepụ burrs n'elu ya, mmetụta igwe anaghịkwa enwu dị ka nke alumina ọcha a gwakọtara agwakọta.