Nigroten Flotation

Many advances have been made in understanding sulfide mineral flotation from an electrochemical model. This information has been used by many researches in order to recognize and solve problems in flotation plants and develop new flotation strategies so that can be possible treat complex sulphide ores by froth flotation.
Air is the most important gas in the flotation of minerals, but the use of other gas in place of or in addition to air is getting more attention each time with more frequency. The use of nitrogen is the main option.
The use of nitrogen in place of air can lead to marked effects on flotation on sulphide ores. The initial point lies in understanding the electrochemistry of the flotation system. The oxidant environment has an important effect in flotation. Changes in oxidant conditions affect electrochemical conditions that occur from grinding and finish in the flotation circuit.
One of the first applications of nitrogen in minerals flotation was the molybdenite-chalcopyrite separation by flotation. The consumption of NaHS was reduced and separation efficiency was improved obtaining better molybdenum concentrates.
Several applications of nitrogen in minerals flotation systems such as copper-nickel, copper-lead-zinc-pyrite, copper sulphides, pyrite-sphalerite, and gold bearing sulphide have been investigated and some of them are used industrially.

Syndicate