He mea kaulana loa ka solution gravity pan mill ma nā ʻāina he nui o ʻApelika e like me Zimbabwe, Egypt a me Sudan, ʻO nā kaʻina hana e ʻoki ʻia → wili → Knelson centrifugal concentrator koho (e kiʻi i ke gula manuahi nui loa)→ papaʻaina lulu (e koho i ke gula maikaʻi. mai ka huelo oka) E hookomo mua i ka pohaku iloko o ka jaw crusher, o ka mea hoohalike maa mau ia PE250x400, nona ka mana he 10 a 20 tona no ka hora.Ma hope o ka ʻoki ʻana, ua wāwahi ʻia ka pōhaku i nā ʻāpana ma lalo o 20mm.Hoʻokomo ʻia nā ʻāpana i loko o ka wili pulu gula, a hoʻoheheʻe ʻia lākou i ka pauka ma kahi o 100 a 150 mesh (mai 80 a 150 micron).A laila, hoʻoneʻe ʻia ka slurry i hana ʻia i loko o ka wili pulu i ka concentrator centrifugal gula, kahi e hōʻiliʻili ʻia ai kekahi one ʻeleʻele gula.A laila hele ka huelo i ka papa ʻaina no ka hoʻihoʻi hou ʻana i ke koena gula.
E hoʻouka ʻia nā mea hana gravity gula i loko o ka pahu 20ft a i ʻole 40ft e like me ke ākea a me ke kaumaha.A hiki i kēia manawa, ua hoʻouna mākou i nā mea ʻumekaumaha i nā ʻāina he nui, me Sudan, Zimbabwe, Mauritania a me ʻAigupita.