TITANIUM DIOXIDE SCOURING MEDIA AND METHOD OF PRODUCTION

• Main Authors: KRAUSE, CLAUDE, A, WOOLFOLK, WILLIAM, SCOTT
• Format: Patent
• Language: English; Spanish
• Published: 15.12.2006
• Subjects: ADHESIVES; ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONCRETE; DYES; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INORGANIC CHEMISTRY; LIME, MAGNESIA; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; POLISHES; PREPARATION OF CARBON BLACK; REFRACTORIES; SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS, SLAG, OR MIXTURESCONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER; SLAG; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES; TREATMENT OF NATURAL STONE; WORKING CEMENT, CLAY, OR STONE

Round and spherical titanium dioxide scouring media and a method for producing the media are disclosed. The scouring media is effective in removing titanium dioxide buildup on the walls of a titanium dioxide reaction vessel. The method consists of forming green titanium dioxide pellets in a high intensity mixer by mixing commercially available titanium dioxide dust, water and a surfactant. The high intensity mixer produces substantially round, and spherical green pellets which are subsequently sized and sintered in a kiln to form round and spherical titanium dioxide sintered pellets that are suitable as a scouring media. The high intensity mixer allows the operator to closely control the size and shape of the pellets during the forming process to produce substantially round and spherical green pellets. Because the sintered titanium dioxide pellets are substantially round and spherical in shape, they are much less abrasive to the walls of the reaction vessel. Furthermore, as the pellets themselves abrade away, they do not contaminate the titanium dioxide product, and they can even be reprocessed into round and spherical scouring media. Se describe un medio de decapado de dioxido de titanio redondo y esferico y un metodo para producir el medio. El medio de decapado es efectivo para retirar la acumulacion de dioxido de titanio sobre las paredes de un recipiente de reaccion de dioxido de titanio. El metodo consiste en formar pelotillas en crudo de dioxido de titanio en una mezcladora de alta intensidad al mezclar polvo de dioxido de titanio comercialmente disponible, agua y un surfactante. La mezcladora de alta intensidad produce pelotillas en crudo sustancialmente redondas y esfericas las cuales son dimensionadas y sinterizadas subsecuentemente en un horno para formar pelotillas sinterizadas de dioxido de titanio redondas y esfericas que son adecuadas como un medio de decapado. La mezcladora de alta intensidad permite que el operador controle estrechamente el tamano y la forma de las pelotillas durante el proceso de formacion para producir pelotillas en crudo sustancialmente redondas y esfericas. Debido a que las pelotillas de dioxido de titanio sinterizadas tienen una forma sustancialmente redonda y esferica, son mucho menos abrasivas para las paredes del recipiente de reaccion. Ademas, como las pelotillas mismas se desgastan, no contaminan el producto de dioxido de titanio y aun pueden ser reprocesadas en medios de decapado redondos y esfericos.