智利第一座铁矿石球团厂——瓦斯科球团厂于一九七七年十二月建成投产。设计能力为350万吨/年。采用链篦机——回转窑焙烧法。该厂由阿里斯—查默斯—神户公司设计,由美国阿瑟·G·麦奇公司建造。使用的原料为磁选精矿:-325目占85%以上;比表面积为1600～1900厘米~2/克;含铁品位达68%; Chile’s first iron ore pellet plant - Vasco pellet plant was completed and put into production in December 1977. Design capacity of 3.5 million tons / year. Using grate - rotary kiln roasting method. The plant was designed by Aris-Chalmers-Kobe and was built by Arthur G. McGonagall of the United States. The raw materials used for the magnetic separation concentrate: -325 mesh accounted for more than 85%; specific surface area of ​​1600 ~ 1900 cm ~ 2 / g; iron grade of 68%;