A reverse flotation system with adjustable iron concentrate grade

Abstract

The invention relates to a reverse flotation system with adjustable iron concentrate grade. The system comprises a flotation reagent stirring system, a roughing flotation work system, a fine flotationwork system and a sweeping flotation work system and is characterized in that the flotation reagent stirring system adopts five flotation reagent stirring tanks which are connected in sequence, the roughing flotation work system is composed of a segment of roughing flotation work tank, the fine flotation work system is composed of continuous four segments of fine flotation work tanks which communicate, the sweeping flotation work system is composed of continuous four segments of sweeping flotation work tanks which communicate, and concentrate bypass main pipelines are arranged on the lower portions of the roughing flotation work tank and the fine flotation work tanks. A rubber plug valve of any section flotation tank in the reverse flotation system is closed, a passage of flowing of flotation underflow ore pulp to the subsequent flotation tanks can be cut off, the flotation and selection time can be shortened, the aim of selecting iron concentrates of different grades can be achieved,and the flotation work of multi-product schemes can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, in particular to a reverse flotation system with adjustable grade 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. Reverse flotation means that minerals are hydrophilic and gangues are hydrophobic. Gangue minerals are taken out by foam into the foam product and discharged from the upper foam layer, and hydrophilic useful minerals are 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 foaming agents need t...

AI Technical Summary

Problems solved by technology

In this method, 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 achieve a sufficient 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 flotation. effect, increased potion dosage

In addition, in many current reverse flotation operations, in order to fully combine the reagents and minerals, it is necessary to maintain a certain flotation temperature, generally 30 ° C ~ 35 ° C, and the temperature of the general pulp is mostly 5 ° C - 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 reverse flotation operation only produces the final concentrate at the end of the 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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