Preliminary separation process for ferromagnetic ore separation

Abstract

The invention discloses a preliminary separation process for ferromagnetic ore selection, which comprises the following steps of: (1) screening crushed raw ore, returning the oversize product to a crushing machine and crushing, directly performing dry magnetic separation on the undersize product to magnetically separate dry magnetic separation concentrates and dry magnetic separation tailings, and taking the dry magnetic separation tailings as waste ore; (2) performing wet screening on the dry magnetic separation concentrates by using a 3-10 mm screen, performing wet magnetic separation on the undersize product to magnetically separate wet magnetic separation concentrates and wet magnetic separation tailings, grinding the oversize product in a grinding machine, and grading the grinding products; (3) directly grading the wet magnetic separation concentrates, and taking the wet magnetic separation tailings as final tailings; and (4) returning coarse products obtained through grading to the grinding machine and grinding again, forming the closed grinding-grading cycle, and leading overflow products obtained by grading to the next procedure of the ore separation process. The preliminary separation process provided by the invention has the advantages of reasonability of allocation, smoothness of flow, stability of operation, capability of realizing full and reasonable tailing casting and increased productivity and metal recovery rate of the preliminary separation procedure.

Description

technical field [0001] The invention relates to a pre-selection method suitable for strong magnetic ore beneficiation, and belongs to the technical field of beneficiation. Background technique [0002] With the rapid development of the iron and steel industry, the demand for iron ore has grown rapidly, so lean iron ore can be mined in large quantities. At the same time, due to the application of advanced mining technology and large-scale mining equipment, it has also partially caused the dilution of mined ore. The rate rises, thereby reducing the ore grade. The traditional steps of beneficiation process are: crushing, screening, grinding, grading and sorting. In order to save energy and reduce consumption, reduce the cost of beneficiation and processing, and increase the economic benefits of enterprises, many beneficiation plants have applied pre-selection technology, that is, pre-selection technology is used in the crushing and screening process to remove the rocks mixed i...

AI Technical Summary

Problems solved by technology

[0003] The traditional dry pre-selection is suitable for the separation of large and coarse-grained strong magnetic ores, and has almost no effect on the separation of fine-grained strong magnetic ores; wet pre-selection is a new technology developed in recent years, which is suitable for processing fine-grained ores. High-grade magnetic ore, after application, can greatly reduce the cost of beneficiation and improve the grinding efficiency; full-size wet pre-selection is restricted by raw ore size, equipment capacity, product concentration, process flow and process configuration, and it is difficult to achieve stable operation.

Images