Effect of grinding size on flotation (Sanshi Mineral Processing)

When the flotation is too coarse, the ore particles (greater than 100 μm) and the extremely fine ore particles (less than 6 μm) are not well floated and the recovery rate is low.

In the case of flotation coarse granules, due to the large weight, the ore detachment force is increased, it is necessary to:

1 use a sufficient amount of the most effective collector ;

2 increase the aeration of the slurry, causing larger bubbles and increasing the amount of microbubbles precipitated in the water;

3 The mixing strength of the pulp should be appropriate;

4 to increase the concentration of pulp properly;

5 Scraper should be quick and smooth when scraping.

In the case of flotation of very fine particles (usually referred to as less than 5-10 μm of slime), you need to:

1 Because the quality of the slime is very small, it is easy to adhere to the surface of the coarse particles, so that the floatability of the coarse particles is lowered, and the selectivity is deteriorated;

2 Because the slime is larger than the surface, they will adsorb a large amount of flotation agent in the pulp, which will reduce the concentration of the agent in the slurry, destroy the normal flotation process and reduce the flotation index;

3 Because the slime has a very fine surface area, the surface activity is increased, it is easy to work with various chemicals, it is difficult to sort, and it has strong hydration, so that the foam is excessively stable, and the selection may cause difficulty. Reduce the quality of the concentrate and reduce the fluidity and concentration efficiency of the foam product.

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