He mea kaulana loa ka solution gravity pan mill i na aina he nui o Aferika e like me Zimbabwe, Egypt a me Sudan,Ke wili nei ke kaʻina hana → grinding→ knelson centrifugal concentrator selection(no ka loaʻa ʻana o ke gula manuahi nui nui)→ papa haʻalulu (e koho i ke gula maikaʻi mai ka huelo oka). 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.