Mineral processing process for improving quality and reducing silicon of iron ore concentrate

Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of mineral engineering, and in particular relates to a beneficiation process for improving the quality and reducing silicon of iron concentrate. Background technique [0002] Mineral resources are an extremely important material basis for human development and survival, and are non-renewable and irreplaceable in the short term. With the rapid development of my country's industrialization, the demand for mineral resources is increasing day by day, but in the process of utilization of mineral resources, the loss and waste of resources are also quite serious, which has brought many adverse effects on environmental protection and smelting production. Some iron concentrates have high iron grades, but also high silicon grades, and the grinding fineness -200 mesh accounts for 70~75%, which cannot meet the requirements of pipeline transportation. With the deepening of the development and utilization of mineral reso...

AI Technical Summary

Problems solved by technology

With the rapid development of my country's industrialization, the demand for mineral resources is increasing day by day, but in the process of utilization of mineral resources, the loss and waste of resources are also quite serious, which has brought many adverse effects on environmental protection and smelting production

Some iron concentrates have high iron grades, but also high silicon grades, and the grinding fineness -200 mesh accounts for 70~75%, which cannot meet the requirements of pipeline transportation

Images