The main purpose of frothers in froth flotation is to cost effectively reduce bubble size and to stabilize the mineral laden bubble just long enough to remove it from the flotation cell with minimal detrimental effects on operability and grade/recovery performance.
Many factors must be considered when choosing the right frother for the flotation circuit such as:
Ability to carry load(weak vs. strong)
Ability to break down(brittle vs. persistent)
Dilatability for easy feeding(water vs. non water soluble)
Operability(wide vs. narrow operating flexibility)
Kinetics (fast acting vs. long lasting)
Selectivity(does it promote insoles or dilute grade)
Cost performance (price per lb vs. cost per ton)
Drainage(frother ability to clean the concentrate)
A wide range of frothers are available to choose from. The choice is somewhat difficult because most specific frothers have inverse relationships between the many desired characteristics ,such as getting both fast kinetics and high strength from one type of frothers. This has lead to a trend to formulate different types of frothers to provide the desired performance.
Florrea offers a wide range of products to meet the needs of the operators.
As stated earlier, the selection of the frother is difficult to predict and essentially unique to the set of condition in each circuit. There are some general guidelines to follow that may help narrow the types of froth that will be optimal for a particular application.
Florrea frother are preferred when ease of feeding, load of support of heavy coarse minerals, operation of large cells and recovery are the major factors. They produce wet froths and tend to stay in the aqueous phase which will lower the overall dosage requirements and cost as the frother is reciurculated. They are good choices when achieving a froth is difficult (such as in flotation in sea water), when floating coarse grind materials at high alkalinities and when using large cells where a more persistent froth is needed.
Because the correct choice of frother is so dependent on equipment and operating factors as well as chemistry, it is very difficult to translate lab data to the plant. It is recommended that plant testing be used in properly managed and designed test program to determine the optimum frother and operating procedures. Florrea representatives are available to assist in conducting this testwork and to advise on proper frother choice.
They are readily soluble in water, so can be diluted to any given strength.
Besides their particular structure, their molecular weight plays 2a significant role in their performance.
This flotation frothers tend to produce the type of froth described in the second category above. Because of their persistence, stage-addition may not be necessary.
Due to their solubility and low vapor pressure, they have a greater tendency to be returned to the flotation circuit in the recycle water.Flotation Frother