ZWell nwere ike imepụta na hazie bọọlụ dị iche iche nke dayameta maka usoro egweri SAG-Ball Mill.
SAG (igwe igwe na-egweri nke ọkara-autogenous) bụ akụrụngwa egweri nwere ọrụ abụọ: ịhịa aka n'ahụ.Na mgbakwunye na ihe a gbajiri agbaji n'onwe ya dị ka ihe na-egweri ihe, a na-agbakwunye nnukwu bọọlụ ígwè.SAG igwe nri nwere ike ozugbo tinye nnukwu nkọwa nke mineral particles.SAG igwe igwe nwere nnọọ mbara ngwa nso, nke gbasaa si nhazi nke na-abụghị ọla ore na ferrous metal, na-abụghị ferrous metal ore dị ka ọla kọpa ore, molybdenum ore, ndu na zinc ore. na ọla ọla na-adịghị ahụkebe.