Ọkpụkpụ spinel fused bụ ọka magnesia-alumina spinel dị ọcha, nke a na-ebute site na ijikọ magnesia dị ọcha na alumina n'ime ọkụ ọkụ exlectric arc. Mgbe emechara ya ma mee ka ọ dị jụụ, a na-egwepịa ya ma mee ka ọ dị mma maka nha ed. Ọ bụ otu n'ime ihe ndị kasị eguzogide refractory ogige. Inwe a ala thermal arụ ọrụ okpomọkụ, bụ pụtara ìhè na elu refractoriness thermal kwụsie ike na chemical kwụsie ike, magnesia-alumina spinel bụ a ukwuu tụrụ aro refractory akụrụngwa. Ya magburu onwe àgwà tics dị ka ọmarịcha agba na ọdịdị, elu nnukwu njupụta, siri ike na-eguzogide exfoliation na ike iguzogide thermal ujo, nke e nable ngwaahịa na-ọtụtụ-eji na rotary kilns, n'elu ụlọ nke electric oven ígwè na ígwè agbaze, ciment. rotary kiln, iko ọkụ na me etallurgical industries wdg.