加拿大温哥华岛北部艾兰德(Island)铜选厂最近建成投产,采用6台直径32呎(约10米)、长14呎(约5.2米)的自磨机。每台磨机需功率7000马力,每小时处理矿石240吨,机内不加钢球及其他介质。该选厂日处理(设计)33,000吨铜钼矿石,年产铜精矿23万吨,钼精矿1800吨。该矿已 The copper plant in Island, north of Vancouver Island, Canada, was recently put into operation using six self-mills with a diameter of 32 feet (about 10 meters) and a length of 14 feet (about 5.2 meters). Each mill needs a power of 7,000 horsepower and 240 tons of ore per hour, without balls and other media. The plant processing (design) 33,000 tons of copper and molybdenum ore, with an annual output of 230,000 tons of copper concentrate, molybdenum concentrate 1,800 tons. The mine has