Ogologo Ngwa bara uru:
1. Ọkara, mma na ultrafine egweri nke nnukwu ihe.
2. N'ime ụlọ ọrụ nhazi nke ịnweta, enwere ike idobe ya n'ihu igwe igwe, dị ka ihe eji eme ihe tupu egweri, ma ọ bụ mee ka usoro ihe eji eme ihe na-ejikọta ya na igwe igwe.
3. N'ime ụlọ ọrụ pellet oxidized, nwere ike dochie igwe igwe na-ekpo ọkụ na-ejikarị.
4. N'ime ihe owuwu ụlọ, ihe ndị na-emegharị ihe na ụlọ ọrụ ndị ọzọ, ejirila nke ọma tinye na clinker ciment, limestone, bauxite na ihe ndị ọzọ na-egweri.