NOVELTY - Titanium concentrates are manufactured by oxidation of dried ore in rotary kiln or fluidized bed reactor under a flow of air or oxygen at 1000-1000 degrees C in the presence of a mixture of sodium fluoride and amorphous silica in a 3-10% sodium fluoride and 1-10% silicon dioxide proportion with respect to the amount of material fed to oxidation.    USE - For manufacturing titanium concentrates with high contents of TiO2 and low contents of radionuclide elements from anatase mechanical concentrates.    ADVANTAGE - The method obtains better quality titanium concentrate when compared to other raw materials used in the chloride route of titanium dioxide pigment manufacture.    DETAILED DESCRIPTION - Manufacturing titanium concentrates with high contents of titanium dioxide (TiO2) and low contents of radionuclide elements from anatase mechanical concentrates comprises:    (i) ore calcinations in fluidized bed or rotary kiln at 400-550 degrees C for 0.5-1 hour;    (ii) converting hydrated iron oxides into hematite and promoting less needed time for the next reduction step;    (iii) magnetizing reduction of the calcinated product in fluidized bed or rotary kiln at 400-550 degrees C during 5-30 minutes using hydrogen, carbon monoxide, natural gas or any other reducing gas in order to convert hematite into magnetite;    (iv) low-intensity magnetic separation of the reduced product in drum separators, 600-800 Gauss magnetic field, extracting the magnetic fraction formed in the reduction stage; dry, high-intensity magnetic separation of the low-intensity non-magnetic fraction in drum or roll separators and rare-earth permanent magnet, 16000-2000 Gauss magnetic field, extracting silicates, secondary phosphates, monazite, calzirtite, zirconolite, and uranium and thorium bearing minerals;    (v) hydrochloric acid leaching of the high magnetic fraction in agitation or column tanks with 20-30% w/w hydrochloric acid, with 1/2 w/w solid-liquid ratio, at 90-107 degrees C for 2-4 hours, solubilizing primary phosphates, iron oxides, aluminum, magnesium, barium and calcium;    (vi) filtration of leached product in belt filter;    (vii) drying of filtrated product in rotary or fluidized-bed drier;    (viii) oxidation of dried ore in rotary kiln or fluidized bed reactor under a flow of air or oxygen at 1000-1000 degrees C in the presence of a mixture of sodium fluoride and amorphous silica in a 3-10% sodium fluoride and 1-10% silicon dioxide proportion with respect to the amount of material fed to oxidation, forming in the boundary of anatase grains a radionuclide-rich vitreous phase, in addition to promoting radionuclide migration to the iron-rich phase;    (ix) quenching in water of the oxidation product, respectively stabilizing the vitreous and the iron-rich phases;    (x) hydrochloric acid leach of quenched product in agitation or column tanks with 20-30% w/w hydrochloric acid with 1/2 w/w solid-liquid ratio, 90-107 degrees C during 2-4 hours in the presence of sodium fluoride or hydrochloric acid, solubilizing the radionuclide-rich vitreous phase through the action of generated or added ion fluoride ion action;    (xi) filtering of second leaching product in belt filter;    (xii) drying of filtrated product in rotary or fluidized bed drier; and    (xiii) dry, high-intensity magnetic separation in drum or roll separator and rare-earth permanent magnet, separating the iron containing, radionuclide rich fraction, the non-magnetic fraction becoming the end product and the magnetic fraction being discarded.    DESCRIPTION OF DRAWING(S) - The figure is a schematic diagram of processing of anatase mechanical concentrates.