位于挪威北角开采铁矿石的塞德瓦兰杰（Sydvaranger）公司于七十年代后期，为了维持和增产，需要更大的粉碎能力以处理较硬且较贫的矿石。该公司想要增加球磨机的能力，但不希望安装更多细碎设备或引人捧磨机。实现这一愿望最有效的途径就是用一台极大型球磨机取代其中一台老的 In the late seventies, Sydvaranger, an ore mining company located in the northern tip of Norway, needed greater crushing capacity to handle harder and poorer ores in order to maintain and increase production. The company wanted to increase the capacity of the ball mill but did not want to install more crushing equipment or pull-in mill. The most effective way to achieve this is to replace one of the oldest