Iron ore beneficiation system and process for two pelletized and sintered products

Abstract

The invention belongs to the technical field of iron ore beneficiation and particularly relates to an iron ore beneficiation system and process for two pelletized and sintered products. The iron ore beneficiation system for two pelletized and sintered products comprises a first-stage ball mill-hydrocyclone group, a second-stage ball mill-hydrocyclone group, a first-stage magnetic separator, a second-stage magnetic separator and a conversion device; the conversion device is characterized in that a branch overflow pipe is mounted on a first overflow pipe located between a first-stage hydrocyclone group and a first overflow ore pulp distributer; the tail end of the branch overflow pipe is connected with a second overflow ore pulp distributer; a first switching stop valve is mounted on the first overflow pipe; and a second switching stop valve is mounted on the branch overflow pipe. The system is controlled by the conversion device when fine iron powder for pelletizing and fine iron powder for sintering are produced. The process disclosed by the invention is switched on the basis of an energy-saving stage grinding and stage separation process which is most frequently used for producing the fine iron powder for pelletizing so as to become a production process for a sintered ore, the adaptability of the switched process is wide, and the investment is reduced.

Description

technical field [0001] The invention belongs to the technical field of iron ore beneficiation, and in particular relates to an iron ore beneficiation system and process for pelletizing and sintering two products. Background technique [0002] At present, pellets and sinter are the two main raw materials for ironmaking. Sintering is the reaction of fine-grained powdery materials into lumpy materials, and pelletizing is the reaction of fine-grained powdery materials into agglomerates. General pellets require that the raw material (iron powder produced by the concentrator) has a fine particle size, and the particle size must be ≥80% at -200 mesh (-74μm), and the specific surface area is 1500-2000cm 2 / g, and even higher. The particle size required for sintering is relatively coarse, and the particle size of -150 mesh is 40-50%. It can be seen from the above that the granularity of raw materials for pellets is finer and the comparative area is larger, while the raw materials f...

AI Technical Summary

Problems solved by technology

However, the current iron ore concentrators can basically only produce iron concentrates that meet the needs of pellets or sintering. This requires us to develop a process that has a wide range of applications and can be used in pellets and sintering. Iron ore beneficiation process with simple and fast switching in the production process of fine powder, compact structure of pellets and sintering

Images