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OCR for page 195
Appendix G RUTILE SPECIFICATIONS The following material is an excerpt from the U.S. National Stockpile Purchase Specification P-49-R6, January 30, 1981 (supersedes P-49-R5, November 1, 1967~: DESCRIPTION This specification covers rutile (titanium dioxide) concentrate satisfactory for use in the production of titanium metal, titanium dioxide pigment, welding-rod coatings, and ferro-titanium. CHEMICAL AND PHYSICAL REQUIREMENTS Each lot of rutile purchased under this specification shall conform to the following chemical and physical requirements: A. Chemical Requirements: Content Pe Scent by Weight (Dry Basis) Ti tani ~ Di oxide (TiO2 ~Min . 9 5 .00 Ferry c Oxide (Fe2O3) Max. 1.00 Silica (SiO2) Max. 1.25 Phosphorus Pentoxide (P2O5 ~Max. 0.05 Sulphur ~ S) Max. 0.03 Zirconium Dioxide ~ ZrO2) Max. 1.00 Alumina (Ai2O3 ~Max. 0 . 7 5 Vanadium Pentoxide (V2O5) Max. 0.75 Chromium Oxide (Cr2o3 ~Max. 0.7 5 Magnesium Oxide plus Calcium Oxide (MgO+CaO) Max. 0.25 Tin (Sn) Max. 0.10 Manganese (Mh) Max. 0.02 Niobium Pentoxide ~ Nb2Os) Max . O .60 (Radioactive Identification: Report for each lot the Percent by Weight of naturally occuring thorium, uranium, or combination of the two. 195

OCR for page 195
196 Phys ice l Requi remeet s: All rutile shall pass a U. S. Standard Sieve No . 30 (A. S.T.M. Designation E-ll ~ with not more than one percent passing a U. S Standard Sieve No. 200. . Note P-49-R6 also contains Section III on Packaging ~ Marking ~ Ident If ication' and Shipping; Section IV on Sampling ~ Inspection' and Testing.