In order to improve the selectivity of the flotation process, enhance the effects of collectors and foaming agents, reduce the mutual inclusion of useful component minerals, and improve the slurry conditions of flotation, regulators are often used in the flotation process. Adjusters in the flotation process include many chemicals. According to their role in the flotation process, they can be divided into inhibitors, activators, medium adjusters, defoaming agents, flocculants, dispersants, etc. During the froth flotation process, inhibitors are agents that can prevent or reduce the adsorption or action of the collector on the surface of non-flotation minerals, and form a hydrophilic film on the surface of the minerals. According to their chemical composition, they can be divided into two categories: inorganic compounds and organic polymer compounds.
The role of inhibitors
During the froth flotation process, inhibitors are agents that can prevent or reduce the adsorption or action of the collector on the surface of non-flotation minerals, and form a hydrophilic film on the surface of the minerals. According to their chemical composition, they can be divided into two categories: inorganic compounds and organic polymer compounds.
Mechanism of inhibitory action of inhibitors
The inhibitory mechanism of inhibitors is: (1) Formation of a hydrophilic compound film on the surface of non-flotation target minerals, such as dichromate inhibiting galena; (2) Formation of hydrophilic colloid adsorption on the surface of non-flotation target minerals For example, zinc sulfate generates zinc hydroxide (or zinc carbonate) in alkaline slurry and is adsorbed on the surface of sphalerite (iron blende) to inhibit it. Silicate starch and other minerals that are not intended for flotation are also easily A hydrophilic colloid adsorption film is formed on the surface; (3) A hydrophilic ion adsorption film is formed on the surface of non-flotation target minerals, such as HS(-) and S(2-) generated by the dissociation of sodium sulfide in alkaline slurry, which can be adsorbed A hydrophilic ion adsorption film is formed on the surface of non-flotation sulfide minerals; (4) Certain strong oxidants decompose the collector film adsorbed on the surface of non-flotation sulfide minerals to expose its hydrophilic surface.
Post time: Oct-11-2024
