Energy-saving type index-adjustable direct flotation system for iron ore concentrate products

Abstract

The invention relates to an energy-saving type index-adjustable direct flotation system for iron ore concentrate products. A flotation chemical agent stirring system, a rough flotation operation system, a sweeping flotation operation system and a fine flotation operation system are included; five sequentially connected flotation chemical agent stirring grooves are adopted for the flotation chemical agent stirring system; the rough flotation operation system is composed of a segment of rough flotation operation groove; the sweeping flotation operation system is composed of four segments of continuous fine flotation operation grooves communicating with one another; the fine flotation operation system is also composed of four segments of continuous fine flotation operation grooves communicating with one another; and the lower portions of the fine flotation operation grooves are provided with an ore concentrate bypass main pipeline. According to the energy-saving type index-adjustable direct flotation system for the iron ore concentrate products, by closing a gate plate valve on any segment of fine flotation ore concentrate discharging pipe A in fine flotation operation and opening a gate plate valve of a discharging port of the ore concentrate bypass main pipeline, subsequent fine flotation operation of the segment of flotation operation can be cut off, and therefore the ore concentrate grade of flotation products and the recycling rate are adjusted, flotation operation adjustable in ore grade is achieved, and different market requirements are met.

Description

technical field [0001] The invention belongs to the technical field of ore dressing, in particular to an energy-saving positive flotation system with adjustable product index of iron ore concentrate. Background technique [0002] In beneficiation, due to the difference in hydrophilicity and hydrophobicity between useful minerals and gangue minerals, most fine-grained minerals can be sorted by flotation. Flotation is divided into positive flotation and reverse flotation. Positive flotation means that useful minerals are hydrophobic and gangues are hydrophilic. Useful minerals are taken out by foam into the foam product and discharged from the upper foam layer, and hydrophilic gangue is in the lower part. The slurry layer is discharged. At present, in order to expand the sorting difference during flotation and make the difference between hydrophilic substances and hydrophobic substances more obvious, most flotation needs to add inhibitors and activators; Collectors and foami...

AI Technical Summary

Problems solved by technology

In this way, when different agents are added to a stirring tank at the same time, there is an interaction between the agents, and it is impossible to realize the full effect of one agent on the mineral and then combine with another agent. Often the adhesion effect of the agent is poor, which reduces the floating Select effect, increase potion dosage

In addition, in many current positive flotation operations, in order to fully combine the reagents and minerals, it is necessary to maintain a certain flotation temperature, generally 30°C to 35°C, and the temperature of the general slurry is mostly between 5°C and 20°C , which requires heating the pulp, which consumes a lot of energy

The current flotation generally uses heating in the three ore-feeding stirring tanks before flotation. This heating method often cannot adjust the heat supply or the room for adjustment is small, and the energy consumption is large.

Moreover, the current positive flotation operation only produces the final concentrate in the final stage of flotation and concentration operation, and can only produce a fixed quality concentrate

In addition, in most of the current flotation operations, the concentrate from the lower stage is returned to the upper stage, and the tailings from the lower stage are returned to the upper stage, resulting in a low yield of the final concentrate

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