In the flotation process, before or after the addition of the collector , some inorganic or organic agents that can change the mineral surface properties or the properties of the minerals and contribute to the mineral separation are collectively referred to as regulators. Such agents mainly include inhibitors, activators, and pulp pH adjusters.
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Any agent that can capture the hydrophilicity of a high mineral surface is called an inhibitor; an agent that increases the hydrophobicity of the mineral surface is called an activator; and an agent that changes the pH of the slurry is called a pH adjuster. Certain inhibitors can reduce or eliminate the adsorption of the collector on the mineral surface and, in some cases, increase the hydrophilicity of the mineral surface.
Conventional inorganic modifier comprising: a variety of multivalent cations, such as calcium ions, iron ions; anionic various anions, such as fluoride, fluorosilicate, sulfide, phosphate, chromate, cyanide and the like pH adjuster inorganic acid and base.
Commonly used organic modifiers include various complexing agents, such as citric acid and its salts. The most used are tannin extract, tannin products, various starches, dextrin, animal and plant gums, and synthetic water-soluble polymer polymerization. Things and so on.
There is no strict division between activators and inhibitors. Some regulators may be inhibitors or activators depending on the conditions used. For example, sodium fluoride, when used in combination with an anionic collector, acts as an inhibitor for silicate minerals; when used in combination with a cationic collector, it acts as an activator for silicate minerals. Individual regulators, such as ferric nitrate and manganese sulfate, when flotation of hematite with sodium oleate, exhibits activation when used in small amounts and inhibits when used in large amounts.
1. Inorganic and organic inhibitors
1. Inorganic inhibitors Inhibitors and inhibited minerals are shown in Table 1.
Table 1 Â Inorganic inhibitor
2. Organic inhibitors
Inhibitors and inhibited minerals are shown in Table 2. [next]
Table 2 Examples of organically inhibited minerals
Second, inorganic and organic activators
The inorganic and organic activators and activated minerals are shown in Table 3.
Table 3 Inorganic and organic activators and activated minerals
June 16, 2023