The role of flotation agents in the development of flotation

2020-11-19 12:46

Introduction：The role of flotation agents in the development of flotation In the process of flotation development, the application and development of flotation reagent play an important role. In 1909, the use of organic foaming agents such as ketones,

The role of flotation agents in the development of flotation

In the process of flotation development, the application and development of flotation reagent play an important role.
In 1909, the use of organic foaming agents such as ketones, aldehydes and lipids, followed by the emergence of oil and alcohol foaming agents.

Between 1915 and 1922, the term collector (that is, the collector oil of the time) was used to refer to certain non-bubbling oils that had the ability to catch floating minerals.But since 1921, people discovered the nitrogen containing trivalent and containing the bivalent sulfur soluble or less water soluble organic compounds can replace the collector oil, especially the xanthate salt was discovered in 1925 can be used as effective collector of sulfide mineral, the flotation effect is significantly increased, greatly promote the development of sulphide ore flotation, and the flotation in the 1930 s become an important process in mineral processing.The application of xanthan salt, then one of the most remarkable achievements in the history of mineral processing, was even seen as marking the revolution of flotation technology, thus ending the historical development stage of using only oil as the only collector.In 1924, there was a patent for the recovery of oxidized minerals by soap collectors;An amine cationic collector appeared again in 1935.As a result of various organic synthetic collectors, the range of use of flotation is expanding, not only for curing sulphide minerals, but also for treating non-sulphide minerals.
In order to achieve the selective separation of polymetallic ore, it is found that some inorganic salt flotation agents have important effects on improving the separation of sulfide minerals or the flotation of non-sulfide minerals.In 1903, sodium sulfate (anhydrous glauber salt) was adopted. In 1905, patents were issued to treat non-ferrous metal oxidized ore with alkali metal sulfide or polysulfide. In 1912, the inhibition effect of dichromate on galena was found.In 1913, it was found that copper sulfate could improve the floatability of sphalerite, and then sulfur dioxide could inhibit sphalerite, thus the preferred flotation of sulfide minerals was initiated.Furthermore, it was found that lime had a significant inhibitory effect on pyrite, especially the selective inhibition of cyanide in 1922, which made the preferential flotation of polymetallic sulfide ore more effective.Sulfur compounds (such as sodium sulfide) were discovered in 1923, and inorganic salts such as sulfites were found to be used as inhibitors in separation flotation of polymetallic sulfide ores in 1924.Especially in modern times, many new special effect agents keep appearing, which greatly improves the efficiency of separation and promotes the rapid development of flotation theory and technology.
The flotation of sulphide minerals by alkaline medium began in 1921 due to the corrosive effects of acidic medium on the equipment.The importance of slurry pH in flotation circuit was recognized around 1929, and then attention was paid to the control of slurry pH value.

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The role of flotation agents in the development of flotation