Detailed explanation of the flotation method for zinc oxide in phosphating solution

2021-11-18

The enrichment of zinc oxide minerals and gangue minerals containing calcium, magnesium, and iron at room temperature has always been a challenge. Because the interaction between dissolved components and mineral surfaces alters the mineral surface, the flotation separation of gangue minerals containing zinc oxide minerals and calcite, dolomite, limonite, and other calcium, magnesium, and iron minerals is particularly difficult. Currently, most zinc oxide ore flotation uses a sulfidization flotation process...

　　 Zinc oxide in phosphating solution The enrichment of minerals and gangue minerals such as calcium, magnesium, and iron at room temperature has always been a challenge. Because the interaction between dissolved components and mineral surfaces can alter the mineral surface, the flotation separation of gangue minerals containing zinc oxide minerals and calcite dolomite, limonite, and other calcium, magnesium, and iron is particularly difficult.

　　Currently, most of the flotation of zinc oxide ore adopts the sulfidization flotation process, in which lead oxide mainly uses xanthate flotation after sulfidization, and the recovery of zinc oxide in phosphating solution mainly uses warm sulfidization, copper sulfate activation and then xanthate flotation or sulfidization and then fatty amine (Fermin). The amine flotation of zinc oxide ore is sensitive to ore and dissolved salts. A lot of research and practice have been carried out on the flotation process of zinc oxide ore at home and abroad, but the problems of low selectivity index, complex process and reagent types, and high cost have not been solved. Therefore, it is a very meaningful research direction to adopt a simple flotation procedure, conventional reagents, and cost-effective flotation of zinc oxide ore.

　　The main flotation methods for zinc oxide in phosphating solution are as follows:

　　1. Sulfidization-amine flotation

　　Studies have shown that aliphatic primary amines can combine with lead, zinc, etc. to form complexes, but do not react with calcium and magnesium, proving that primary amines are more effective than other types of collectors. This method has been applied to the production practice of zinc oxide ore, achieving a breakthrough in the flotation process. Currently, most of the beneficiation plants and zinc oxide manufacturers use the amine method. Zinc oxide in phosphating solution The selection plant and zinc oxide manufacturers mostly use the amine method.


Zinc oxide in phosphating solution


　　Studies have shown that the mechanism of action between smithsonite and amine is the synergistic effect of amine-zinc complexes in zinc sulfide after sulfidization of smithsonite, and the mineral surface has sufficient hydrophobicity. According to literature reports, Zinc oxide in phosphating solution Using organic activator-amine flotation, compared with the traditional xanthate-amine method, has the characteristics of high grade of concentrate, low drug consumption, and less environmental pollution.

　　2. Sulfidization-xanthate flotation

　　Zinc oxide minerals can be recovered by adding xanthate after sulfidization. The adsorption amount of xanthate on the mineral surface after sulfidization increases with the increase of sodium sulfide concentration, which can prevent the adsorption of xanthate by smithsonite to some extent, thereby inhibiting the oiliness of smithsonite. Pulp heating is very beneficial to the adsorption of sulfidizing agent on zinc oxide ore. However, this method consumes a lot of activators and collectors.

　　3. Direct flotation of fatty acids

　　Fatty acid collectors are directly used for the flotation of zinc oxide ore, which has a good flotation effect on zinc oxide ore containing silicon coal gangue or coal gangue minerals. However, the flotation effect of zinc oxide ore containing carbonate gangue minerals is not ideal. The effect of iron on high-grade zinc oxide ore is particularly limited. Due to the selectivity difference for most ores, it has not been popularized in industry. The extraction of lead-zinc resources, especially zinc oxide resources, is still difficult. Zinc oxide ore is dense and muddy, and the beneficiation effect is not good.

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