Common method of reverse flotation treatment of iron ore

Common iron ore reverse flotation processing methods, there are two, one cationic collector reverse flotation process, and second, anionic collector reverse flotation method.

The reverse flotation method using cationic collector is to adjust the slurry pH=8-9 with sodium carbonate, inhibit iron ore with starch, dextrin, tannin, etc., and float quartz gangue with amine collector, in which ether The amine is the best, followed by the aliphatic amine. The advantages of this method are:
1. The flotation can be carried out in the case of coarse grinding, and the amine collector can well float the monomer quartz as long as the slurry is ground to the monomer dissociation.
2. Ore containing hematite and magnetite. Because magnetite is not easy to float, it is often selected by magnetic separation process plus flotation combined process. However, if cations are collected by cationic collector, the red iron is Minerals and magnet minerals are left in the tank and recycled, simplifying the process.
3. If the ore contains iron silicate and is positively floated with an anionic collector, the iron silicate will reduce the quality of the concentrate with the concentrate selected from the hematite, but if a cationic collector is used In the case of reverse flotation, it floats out with quartz to improve the grade of iron concentrate.
4. Reverse flotation with cation collector can eliminate the de-sludge operation and reduce the loss of iron minerals. This method is suitable for the flotation of high-grade, complex iron ore.

In order to remove phosphorus ore and minerals with silica may be employed in a strong alkaline medium pH = 11 ~ 12, to starch as inhibitors to Ca ++ as the activator of the anionic collector reverse flotation process, which is recommended The effect of the process is the best, the iron concentrate grade can be increased to 65%, the phosphorus content is reduced to less than 0.015%, and the selective flocculation de-sludge-anion capture can be used for the fine-grained phosphorus-containing weak magnetic iron ore. The agent ca plus activator reverse flotation process simultaneously removes impurities such as phosphorus and silicon, and the iron ore is tested by this process. The results show that the phosphorus removal effect of the process is better than that of the selective flocculation desiccant-cation collector. Flotation process.

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