Горный институт Кольского научного центра РАН, Апатиты, РФ:

Опалев А. С., зам. директора по научной работе, канд. техн. наук, a.opalev@ksc.ru

Алексеева С. А., старший научный сотрудник, s.alekseeva@ksc.ru

Черезов А. А., ведущий инженер, a.cherezov@ksc.ru

Для повышения качества железорудных концентратов из руд Заимандровской группы месторождений проведено научно-методическое обоснование определения оптимальных режимов рудоподготовки при реализации технологии стадиального вывода концентрата с использованием магнитно-гравитационной сепарации. Рассмотрены варианты грохочения по крупности 0,1; 0,125 и 0,16 мм. Показано, что максимальные значения удельной производительности по вновь образованному классу –0,071 мм и минимальные удельные затраты на измельчение достигаются при использовании классификации по зерну 0,125 мм. При этом массовая доля класса –0,071 мм в готовом продукте измельчения составляет 55–57 %, а раскрытие магнетита превышает 80 %. Дальнейшее обогащение такого продукта при использовании магнитно-гравитационной сепарации позволяет для всех разновидностей руды получать высококачественный концентрат с массовой долей Feобщ около 71 %.

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