For the froth flotation
tests, the following reagents were used: Calcium lignosulfonate (CaLS) from Aldrich; Hosta-phat (etanolic solution of alkane phosphonic acid) OPS75E, from Clariant Produkte; sodium hydroxide (NaOH) from Quimitecnica; Methyl Isobutyl Carbinol (MIBC) from CYTEC.
In hindsight, the successful adoption of froth flotation
by Britannia in 1912 was highly significant, for without the ability to produce a satisfactory concentrate by gravity, separation alone the mine would very likely have closed, and development of the deposit would have been postponed for years.
In the froth flotation
process, ABS and HIPS, two plastics that are incompatible but have similar densities, are placed in an aqueous solution of a certain density, surface tension, and pH.
Clariant Mining Solutions is the only supplier in the mining industry to offer customized chemical solutions for the end-to-end mining process, including leading technology in froth flotation
chemistry and explosive emulsifiers.
While the buoyancy analysis has been greatly simplified for the sake of brevity, it should be apparent that the intentional elimination of a distinct froth phase of discernable depth and the creation of a fluidized bed of solids make it possible for the HydroFloat technology to recover much larger particles than traditional froth flotation
Keywords: low grade, lead-zinc ore, galena, sphalerite, beneficiation, froth flotation
, grade, recovery
Some specific areas covered include flotation thermodynamics, flotation reagents, mechanical froth flotation
cells, and sulfide and nonsulfide minerals.
In the froth flotation
process gangue particles are separated from the values (often mineral ores or coal) by virtue of differences in hydrophobicity; the more hydrophilic gangue resides in the interstitial liquid where it drains downwards whereas the more hydrophobic values rise with the bubbles into the concentrate stream.
High recoveries of gold and carbon were obtained in laboratory tests using froth flotation
, with a high rejection of the grit.
Current treatment technologies consist primarily of flocculation, multimedia and cartridge filtering, sedimentation, froth flotation
, hydrocycloning and evaporation; however, these techniques are sometimes found to be ineffective or costly when dealing with waters containing dilute concentrations of fine, suspended colloidal matter.
On this basis a technology involving treatment of PET and PVC particles with alkaline solutions followed by froth flotation
with nonionic surfactants has been developed and tested at a laboratory scale.
Technologies include PET/PVC separations by froth flotation