Poor hematite grading level and narrow level sorting process

Abstract

The invention provides a poor hematite grading level and narrow level sorting process, which is characterized in that three levels of products can be obtained by using a double-section cyclone to grade and reselect a primary ore grinding product and are respectively fed into subsequent selection work to realize grading level and narrow level sorting. The poor hematite grading level and narrow level sorting process comprises the specific steps of: (1) grinding raw ores by a primary ball grinder and grinding the raw ores until the content of a -0.074-micron grain level in primary grading overflowing is 55%; feeding to a cyclone to carry out primary rough-fine grading work to obtain deposited sand of the cyclone of the primary rough-fine grading work; and feeding into primary reselection; (b) feeding the overflowing of the primary rough-fine grading work to secondary rough-fine grading work; and feeding deposited sand of the secondary rough-fine grading work to secondary reselection; and (c) feeding an overflowing product of the secondary rough-fine grading work to magnetic selection work, and feeding concentrate ores of the magnetic selection work to floating selection work, wherein tailings of the magnetic selection work are magnetic selection tailings. The invention provides strengthened rough-fine grading work of a poor hematite ore treatment plant so that the concentrate ore cost is effectively reduced and the iron level of the comprehensive tailings is controlled.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, and in particular relates to a classifying and narrow class sorting process for lean hematite. Background technique [0002] The process of coarse and fine classification in the existing mineral processing technology is: raw ore→feed into the cyclone for coarse and fine classification→sand settling of the cyclone is fed into the coarse screw re-election and sweeping magnetic operation→overflow of the cyclone is fed into In magnetic separation, the separation granularity of the cyclone is too high in the coarse and fine classification operation, generally around 40 microns, the overflow particle size is -0.074mm85~90%, and the classification ratio overflow accounts for more than 30%, which contains a large number of conjoined organisms. The sand settling particle size of the cyclone is about -0.074mm50%, and the fine particle content is also high, which causes: [0003] a. The low-cost g...

AI Technical Summary

Problems solved by technology

At the same time, during the flotation process, this part of the flotation body enters the tailings to increase the grade of the flotation tailings, and also increases the throughput of the flotation operation and the consumption of reagents.

Images