作者: Sergio Alvarado , Pedro Maldonado , Iván Jaques
DOI: 10.1016/S0360-5442(98)00093-0
关键词:
摘要: … Typically, it is necessary to move several hundred tons of ore in order to produce 1 ton of … , for a national average 0.57% grade ore, it was necessary to move 573 tons of material per …