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Synthesis of Rutile from Domestic Ilmenites.

Authors
Elger-GW; Kirby-DE; Rhoads-SC; Stickney-WA
Source
NTIS: PB 240 100 :19 pages
Link
NIOSHTIC No.
10009312
Abstract
Bureau of Mines laboratory tests show that ilmenite concentrates with titanium dioxide contents as low as 33 wt-pct can be beneficiated to produce a crystalline substitute for natural rutile suitable for direct chlorination. The synthesized product prepared by a three-step procedure was comparable with natural rutile in titanium content. Reduction smelting of ilmenite removes iron as a pig iron byproduct, and the remaining slag phase is greatly enriched in titanium. Oxidation of the slag in the presence of phosphorus- bearing slag additive converts the titanium-bearing phases to discrete rutile crystals and a glass phase containing most of the associated impurities. Rutile is separated from the glassy impurities by attrition scrubbing ground slag in dilute phosphoric or sulfuric acid solutions. Tests made in a laboratory fluid-bed reactor show that synthetic rutile responds to chlorination at the same rate as natural rutile and that more than 95 pct of the titanium contained in the feedstock was extracted as titanium tetrachloride.
Publication Date
19740101
Document Type
IH; Report of Investigations
Fiscal Year
1974
NTIS Accession No.
PB-240100
NTIS Price
A03
Identifying No.
RI 7985
NIOSH Division
ALRC;
Source Name
NTIS: PB 240 100
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