Explanation Of Flotation Process Of Titanium Ore

The common titanium-bearing minerals are ilmenite, rutile, chalcocite and sphene. Their floatability is as follows.
Ilmenite (FeTiO3) and rutile (TiO2) can be floated with both carboxylic acid and amine traps. However, when trapping with carboxylic acid, the vein minerals are not easy to float, so carboxylic acid is used more. The specific agents commonly used in industry are oleic acid, tal oil and naphthenic acid and its soap. And commonly used kerosene as auxiliary recovery agent. Before ilmenite and rutile flotation, wash the surface of minerals with sulfuric acid first, which can improve their floatability and reduce the amount of collector.

When ilmenite and rutile are captured with carboxylic acid, pH=6-8, both minerals float relatively well. In acidic medium with pH<5, the oleic acid adsorbed on the surface of ilmenite is easily eluted, and the floatability of ilmenite decreases significantly after washing.

Sodium fluosilicate and sodium fluoride can hinder the solidification of tridecanoic acid and sodium oleate on the surface of ilmenite, reduce their solidification on the surface of ilmenite, and thus inhibit ilmenite, and sodium silicate has a certain inhibitory effect on ilmenite.

The recovery rate of ilmenite flotation is related to the flocculation and dispersion state of the ore particles at the time of adjustment. If the net power consumption of the drive shaft of the adjustment tank and the relationship between the adjustment time curve, according to the size of the power consumption of the adjustment time can be divided into five stages, namely, the induction stage, flocculation stage, flocculation peak stage, flocculation stage and dispersion stage.

When the slurry starts to flocculate (flocculation stage), the net power consumption, ilmenite recovery and chalcopyrite recovery all increase; reaching the flocculation peak stage, the slurry is fully flocculated, and the net power consumption, ilmenite recovery and chalcopyrite recovery all reach the peak; reaching the flocculation disruption stage, the ilmenite recovery remains unchanged, the concentrate grade increases, and the net power consumption and the degree of flocculation decreases; reaching the dispersion stage, the concentrate grade decreases, and the recovery rate is minimum.

Elevate the slurry temperature, the hydrophobicity of the collector film increases, the recovery of ilmenite increases and the concentrate grade decreases. Air filling has obvious effect on titanium and zirconium minerals. Inflated air 60-120S, the recovery of rutile and ilmenite increased while the recovery of zircon decreased. If only nitrogen is charged, the two titanium minerals are inhibited while zircon can float as usual.

CaTiO3 can be treated with sulfuric acid, rinsed, and floated with oleic acid or other fatty acids. Soda and water glass can inhibit it, while chromates and dichromates can activate it. When calcite is abundant in the ore, it increases the acid consumption of the pickling. To minimize the amount of acid used, calcite can be floated before calcite.

Titanite CaTiSiO5 can be trapped with kerosene emulsified oleic acid and can be inhibited by water glass. Its floatability is poorer than other titanium-bearing minerals, and even worse than apatite and other alkaline-earth metal salt minerals, if the associated apatite is more apatite can be floated first apatite.

A titanium zircon ore separation methods and examples

Separation method of titanium lead ore ilmenite, rutile and zircon are often accompanied by the density of all between 4.0 and 4.7 g/cm3, and they enter the heavy sand at the same time when separating them by reelection method. Their floatability is also very close, and when flotation with emulsified oleic acid is used, they enter the mixed concentrate at the same time. Their mixed concentrates are in principle separated in two ways:

(1) Separate ilmenite by magnetic separation first (magnetic separation can also be placed after flotation), suppress zircon with sodium fluosilicate for its nonmagnetic part, and flotation rutile with emulsified oleic acid in a medium of pH=3.8 to 4.6.

(2) Rutile is suppressed with sulfuric acid, and zircon is flown with emulsified oleic acid or a cationic collector.

B an example of titanium zircon ore flotation

The ore is a quartz sand deposit, 80%~95% of ilmenite and rutile is less than 0.15mm, 100% of lead quartz is less than 0.15mm. firstly, their mixed concentrate is obtained by shaking table separation.