A process for producing a titanium dioxide pigment of the rutile type in which a TiO2 hydrolyzate produced by a sulphate process is dried, calcined and milled, characterized by feeding the discharge of the sulfate-based TiO2 calciner to a mill in dry, dry grind the discharge of the TiO2 calciner with sufficient intensity so that the discharge of the dry-milled calciner comprises separate particles having a weight average size no greater than about 0.33 microns and a normal deviation of distribution, no greater about 0.17 microns, form with the discharge of the milled calciner a suspension in an aqueous medium with soluble salts of metals selected from the group consisting of titanium, aluminum, silicon and mixtures thereof, adjust the pH of the aqueous suspension to forming and precipitating the corresponding hydrated metal oxides on the unloading of the dry-milled calcinator and intensive dry milling to the discharge of the hydrated metal oxide-coated calcinator. (Machine-translation by Google Translate, not legally binding)
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