1980年克里沃洛格中央采选公司进行了工业试验,用干式磁选法分选破碎粒度为25～0毫米的磁铁矿石,同时对于干式磁选尾矿进行湿式分级以分离出碎石和砂石这样一种工艺已经被掌握。 1973年苏联黑色冶金选矿设计研究院对格列叶瓦特斯克矿床(中央采选公司)破碎后的磁铁石英岩进行了多次研究和工业试 In 1980 Kerry Volego central mining company conducted an industrial test, using dry magnetic separation of magnetic particle separation of 25 ~ 0 mm size, while the dry magnetic separation of tailings wet classification to separate broken A craft like stone and gravel has been mastered. In 1973, the Soviet Union Black Metallurgical Processing Design Institute conducted a number of studies and industrial tests on the crushed magnetite quartzite from the Glebovtsk deposit (central mining company)