The invention discloses a
mineral processing process for improving the quality and reducing
silicon of
iron ore concentrate. The process comprises the following steps: finely
grinding raw ores to obtain ore
powder or ore pulp of which the ore
powder or ore pulp with the
granularity of 325 meshes accounts for 80%, performing
magnetic separation by using a 800-1000T
magnetic separator to obtain a section of inferior fine
magnetite concentrate and a section of inferior magnetic tailing, performing
magnetic separation on the section of inferior magnetic tailing by using a 10000-14000T
magnetic separator to obtain a section of high fine magnetic concentrate and a section of high magnetic tailing, performing
magnetic separation on the section of inferior fine
magnetite concentrate by using a 800-1200T
magnetic separator to obtain two sections of inferior fine
magnetite concentrate and two sections of inferior magnetic tailing, feeding back the two sections of inferior magnetic tailing to an ore
grinding procedure for fine
grinding, and performing magnetic separation on the section of high fine magnetic concentrate by using a 6000-10000T magnetic separator to obtain two sections of high fine magnetite concentrate and two sections of high magnetic tailing; and
combing the two sections of inferior fine magnetite concentrate and the two sections of high fine magnetite concentrate to obtain total fine concentrate, and combining the section of high magnetic tailing and the two sections of high magnetic tailing to obtain total tailing. By adoption of the process, the grade of the
iron ore concentrate can be increased by about 8.5%, the grade of a
silicon product can be reduced by about 6.5%, the
fineness of the
iron ore concentrate can be improved, the abrasion of a conveying pipeline can be reduced, and the process is short in process procedure, low in operation cost and applicable to industrial popularization and application.