Flotation cell sizes of up to 200m 3 are now available with 150m 3 cell installations being common. The question for many circuit designers is, do the old quot;rules of thumbquot; still apply when selecting the number and size of cells required? The answer is part yes and part no. Rule 1.
Flotation cells are used to separate minerals in a liquid solid suspension of desired and undesired materials. The desired solids are separated by making them hydrophobic, so they will attach to air bubbles that are created with either air injection or agitation along with a reagent. These solids flow over into a launder for capturing.
Flotation cells are a common ore recovery technique applied in ore and mineral mining operations such as copper and gold. The fotation cell is used to foat ore particles away from the crushed ore/rock mix, by driving air into the bottom of the cell to form bubbles which foat to the top of the main body of liquid to create froth.quot;
In this bulletin, flotation columns are compared against mechanical flotation cells for the beneficiation of sedimentary phosphate by reverse flotation. Eriez performed lab tests using columns and mechanical cells using a variety of ore types from one geographical area and under a variety of processing options.
The conditioned pulp is run into a flotation cell, which is crudely a box with a stirrer, and a means of introducing air. Typically, the cell might contain 15 30% by volume of entrained air with bubbles ranging mainly from 0.1 to 5mm in diameter; the pulp density might be 25 40% of solids having a particle size ranging from 10 100um.
Flotation cell operators usually take the virtual and real of flotation froth as the basis for judging the degree of mineralization. If the mineral particles attached to the surface of the froth are many and dense, it is real; if the mineral particles attached to the surface of the froth are few and thin, it is virtual.