The role and principle of collector

The basic way in which the collector acts is the adsorption of molecules or ions of the agent at the mineral-water interface. The effects of collectors and mineral appearance are divided into: physical adsorption, chemical adsorption, and chemical reaction of appearance. The main adsorption methods are: ion adsorption, molecular adsorption, semi-micelle adsorption and the reaction of the collector's reaction product on the mineral surface.

(1) Ion adsorption

The adsorption of collector ions on the mineral surface in the slurry, for example, at pH > 5, the adsorption of xanthate on the galena surface, the oleic acid collector in the calcium-containing mineral (fluorite, calcite, white tungsten) Adsorption on the mine, etc.).

(2) Molecular adsorption

Adsorption of collector molecules dispersed or dissolved in a slurry solution on the mineral surface. The physical adsorption of non-polar molecules is mainly the adsorption of various hydrocarbon oils; the physical adsorption of polar molecules is mainly the undissociated molecules of xanthate, oleic acid and amine collectors at the solid-liquid interface. Adsorption.

(3) Semi-micelle adsorption

When the concentration of the collector is sufficiently high, the non-polar groups of the long hydrocarbon chain collector are adsorbed on the outer surface of the mineral and associate to form a micelle in a two-dimensional space. This adsorption is called "half micelle adsorption".

(4) Adsorption of the reaction product of the collector on the mineral surface

The collector may have a series of reactions during the interaction with other ions or minerals in the slurry, and some of the products in the reaction are adsorbed on the mineral surface. For example, xanthate can be hydrolyzed in the appearance of sulfide minerals or oxidized in the slurry to form hydrocarbyl monothiocarbonate (ROCOS-) and xanthate (ROCss0-), which can be adsorbed on the surface of the oxidized mineral and the appearance of the sulfide ore, respectively. And produce a catching effect.

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