Enwere ụdị ngwaọrụ abụọ maka mmepụta alumina na-arụ ọrụ, otu bụ "ngwa ngwa ngwa ngwa" nke a na-emepụta site na trialumina ma ọ bụ nkume Bayer, nke ọzọ na-emepụta site na aluminate ma ọ bụ aluminom nnu ma ọ bụ abụọ n'otu oge.
X, ρ-alumina na mmepụta nke X, ρ-alumina
X, ρ-alumina bụ isi akụrụngwa maka imepụta bọọlụ alumina arụ ọrụ, ma ọ bụ FCA maka mkpụmkpụ. Na China, a na-akpọ ya "ngwa ngwa ntọhapụ ntụ ntụ" n'ihi ntụ ntụ alumina na-emepụta site na usoro mmiri mmiri ngwa ngwa.
Achọpụtara X, ρ-alumina na 1950 ma bụrụ onye ASTM kwadoro ya na 1960. N'afọ 1970, x na Europe. Igodo nke teknụzụ X, ρ -alumina bụ akpịrị ịkpọ nkụ ngwa ngwa, na-abụkarị n'ime ihe na-eme ihe na-edobe akwa mmiri, ebe okpomọkụ nke ihe ndina na-achịkwa gas combustion ma ọ bụ mmiri mmiri. Na 1975-1980, Tianjin Institute of Chemical Industry ọma mepụtara nkwusioru kpo oku ngwa ngwa iwepụ mmepụta technology na e ji mara Chinese technology. Ọ na-eji cone reactor, gbakwunyere aluminom hydroxide kpọrọ nkụ na nke e gwepịara egwepịa, wee mee ngwakọta nke X-alumina na ρ-alumina site na ọkụ ọkụ ọkụ 0.1 ~ 10s n'ime ọkụ ọkụ na-ekpo ọkụ ngwa ngwa.
Oge nzipu: Eprel-01-2023
