Reagents used in Froth Flotation processes

Tables I, II y III show the main

TABLE I. COLLECTORS.
Anionic.
Type	Chemical description	Minerals promoted
Xanthate	Sodium ethyl xanthate	Chalcocite, sphalerite, galena.
Xanthate	Sodium isopropyl xanthate	Most of sulphides
Xanthate	Potassium amyl xanthate	Most of sulphides
Thionocarbamate	Ethyl-isopropyl-thionocarbamate	Copper sulphides with pyrite
Dithiophosphate	Sodium diethyl dithiophosphate	Copper sulphides with gold and silver.
Mercaptans	Mercapthobenzothiazole	Pyrite in acid conditions.
Other Type
Fatty acid	Oleic acid, sodium oleate	Fluorite, Calcite, Cromite, Barite, Apatite
Alkyl sulphate	Sodium lauryl sulphate	Cromite, Fluorite, Barite.
Cationic.
Amine	Alkyl amine	Selective flotation sylvite-halite
Ammonium salts	Quaternary ammonium chloride	Quartz, Chalcopyrite, Silicates

TABLE II. FROTHERS.
Reagent.	Characteristic
Pine oil	Froth very stable and viscous.
Cresylic acid	Froth stable but little viscosity
MIBC	Very useful with fine particles
Polypropylene glycol	Froth with little consistence
Triethoxybutane	Froth is very fine

TABLE III. MODIFIERS.
Type	Agent	Action
pH Regulators.	CaO, Na²CO^3,NaOH, HCl, H²SO⁴	pH
Activator.	CuSO⁴.5H²O	Sphalerite, pyrite
Activator.	Pb +2, like nitrate or acetate	Stibnite
Activator.	SH^- or S⁼, like NaHS, Na²S	oxidized sulphides, carbonates
Depressant	Zn+2, like Zn SO⁴.	Sphalerite, pyrite
Depressant	CN^{- ,}like NaCN or Ca(CN)²	Sphalerite, pyrite
Depressant	SO²	Sphalerite, pyrite,
Depressant	Quebracho	Calcite.

Debt Financing Contact Metamorphic Minerals Development and Production of a Mining Company Project Straight-Face Concaves Cooked Assays Metal Markets What is an Overflow Grinding Mill Brucite Composition, Crystallization & Structure XANTHATES Selecting the Primary or Jaw Crusher Mining Equipment China Picture of Drill Mounted Smaple Collector Igneous Rocks Nordberg Jaw Crushers Grinding power calculated using Bond grindability Index test in the Bond Equation