Danafloat 345 is an aqueous solution of dialkyl dithiophosphate.

Danafloat 345 has little or no frothing properties. It is a selective collector towards iron sulphides in an alkaline circuit, usually at slightly lower pH than for xanthates. The main application of this reagent is in the flotation of copper sulphides in the presence of pyrite. It is also an effective collector for gold, silver and sphalerite. In many cases a scavenger collector, e.g. small amounts of xanthate, is used. Other applications of Danafloat 345 are the flotation of metallic copper in a low lime circuit and copper oxides and copper sulphides in a mixed oxidesulphide ore.

Danafloat 345 requires only short conditioning time and is therefore useful for staged addition.

Experience has shown that a mixture of alkyldithiophoshate and a xanthate or a mixture of two dithiophosphates is often better than either of the collectors alone.

Danafloat 345 can be added undiluted or preferably diluted with clear water to 5-20% solutions. It is good practice to stir before use.

The dosage of Danafloat 345 is usually considerably less than for other sulphide collectors. It varies with the type of ore, usually falling in the range of 10 to 50 grams per metric ton ore.

Experience has shown that Danafloat 345 is effective in the pH range of 4 to 12. Because of its selectivity towards pyrite, Danafloat 345 can be used at slightly lower pH than xanthates.

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Composition

Chemical name: s-butyl-dtp-Na
CAS name: Phosphorodithioic acid, 0,0-bis(1-methyl-propyl)ester, sodium salt
Active ingredient: 49-51% by weight

Physical properties

Appearance: Light brown
Form: Liquid (aqueous solution)
Boiling point: 104 degrees C
Melting/freezing point: Minus 1 to minus 3 degrees C
Specific gravity: 1.13 g/ml
Flash point: None