Flocculation desliming and acidic flotation method for iron carbonate ore fine-grained products

Abstract

The invention relates to a flocculation desliming and acidic flotation method for iron carbonate ore fine-grained products. The flocculation desliming and acidic flotation method includes feeding selected materials of ground crude ores into a primary fineness classification cyclone to be subjected to classification operation, and is characterized in that settle sand of the primary fineness classification cyclone is graded in a gravity concentration procedure, split flow of the primary fineness classification cyclone is fed into a secondary fineness classification cyclone to be subjected to grading operation, settled sand of the secondary fineness classification cyclone is subjected to acidic direct flotation operation, spilt flow of the secondary fineness classification cyclone is fed into a titling narrow flowing classifier to be subjected to desliming classification operation, coarse-grained products, which have the desliming classification larger than 19 micrometers, of the tilting narrow flowing classifier and rough concentrates A which are obtained by means of acidic direct flotation are combined with one another and then are subjected to acidic reverse flotation grading operation, and concentrates and tailings which are obtained by means of acidic reverse flotation are graded by means of a rougher acidic reverse flotation process, a cleaner acidic reverse flotation process and two scavenging acidic reverse flotation processes. Owing to the processes, the flocculation desliming and acidic flotation method has the advantage that ore dressing technical indexes of the iron carbonate ore ground fine-grained products are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a method for flocculation, desliming and acid flotation of iron carbonate-type ore fine-grained products. Background technique [0002] For a long time, the beneficiation technical indicators of ferric carbonate-type ore, including hematite, magnetite, iron carbonate-type ore, limonite and other iron minerals, are not high, especially for the fine-grained part of its grinding products, most of which use Stage grinding, coarse and fine separation, gravity separation - strong magnetic - reverse flotation process and flocculation desliming reverse flotation process, the specific process is as follows figure 1 As shown, the raw ore enters the closed-circuit grinding composed of a ball mill and a classifier, and the overflow of the classifier is classified into coarse and fine materials by the coarse and fine grading cyclone, and the coarse material of the cyclo...

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