The role of media adjustment in the flotation

The role of media adjustment in the flotation

The media conditioner is often used in the flotation. The main functions are:
1. Adjusting the pH of the slurry Since the pH of the slurry often directly or indirectly affects the floatability of the minerals, adjustment agents are often added during the flotation process to change and adjust the floatability of the various minerals. Under certain flotation conditions, the mineral floatable and non-floating pH boundaries are called critical pH values. As a concentration of 25 mg / l the critical pH (at room temperature) xanthate solution of sulfide ore: 6 pyrrhotite; arsenopyrite 8.4; galena Wanted 10.4; 10.5 pyrite; HUANG copper ore 11.8; blue copper ore 13.2; 13.3 activated sphalerite; bornite 13.8; 14.0 chalcocite.
2. Adjusting the activity of other agents The activities of the flotation agent on the mineral surface are some of the active ions (or molecules) in the agent. When the amount of the agent is constant, the content of the agent ions in the slurry is determined by the pH of the slurry. When a fatty acid is used as a collector , a large amount of active fatty acid ions can be dissociated in an alkaline slurry. The xanthate is easily decomposed in the acidic pulp and is preferably used in alkaline pulp.
3. Eliminate the impact on the harmful ions of flotation. The pulp often contains many "impossible ions", most of which come from the dissociation of soluble salts in ore, but also from industrial water and pharmaceuticals. Their effects on flotation are complex, both activation and inhibition, and some can consume various agents. In order to eliminate the influence, sodium sulfide, alkali, soda and the like are commonly used to form a precipitate of a poorly soluble compound to eliminate it.
4. Adjusting the dispersion of the slime and agglomerating fine minerals often cause different mineral particles to agglomerate unselectively, destroying the selectivity of flotation, reducing the quality of the concentrate, and allowing the useful minerals to be wrapped in the flocs to be easily lost to the tailings. . Floats are commonly used for agglomeration and dispersion of lime, starch, sulfuric acid, and the like.

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