Swanepoel, JJVan Vuuren, DSHeydenrych, M2011-08-102011-08-102010-10Swanepoel, JJ, Van Vuuren, DS, and Heydenrych, M. 2010. Leachability of nitrided ilmenite in hydrochloric acid. Light Metals Conference, Misty Hills, Muldersdrift, 27-29 October 2010, pp. 228-2380038-223X/3http://hdl.handle.net/10204/5124Light Metals Conference, Misty Hills, Muldersdrift, 27-29 October 2010Titanium nitride in upgraded nitrided ilmenite (bulk of iron removed) can selectively be chlorinated to produce titanium tetrachloride. Except for iron, most other components present during this low temperature (ca. 200 °C) chlorination reaction will not react with chlorine. It is therefore necessary to remove as much iron as possible from the nitrided ilmenite. Hydrochloric acid leaching is a possible process route to remove metallic iron from nitrided ilmenite without excessive dissolution of species like titanium nitride and calcium oxide. Calcium oxide dissolution results in unrecoverable acid consumption. The leachability of nitrided ilmenite in hydrochloric acid was evaluated by determining the dissolution of species like aluminium, calcium, titanium and magnesium in a batch leach reactor for 60 minutes at 90 °C under reflux conditions. The hydrochloric acid concentration (11%, 18% and 25%), initial acid-to-iron mole ratio (2:1, 2.5:1 and 3.3:1), and solid-to-liquid mass ratio (1:8.33 to 1:2.13) were varied. The results indicate that a hydrochloric acid concentration of 25 wt. % supplied in a 2:1 acid-to-iron mole ratio would produce the most favourable upgraded nitrided ilmenite product. The dissolution of iron in this solution reached 97 percent after only 60 minutes. The total dissolution of calcium and titanium species was 0.01 and 0.11 wt. % respectively. Hydrochloric acid can therefore be used as lixiviant to remove metallic iron from nitrided ilmenite.enTitanium nitrideUpgraded nitrided ilmeniteHydrochloric acid leachingMetallic iron dissolutionConference PresentationSwanepoel, J., Van Vuuren, D., & Heydenrych, M. (2010). Leachability of nitrided ilmenite in hydrochloric acid. http://hdl.handle.net/10204/5124Swanepoel, JJ, DS Van Vuuren, and M Heydenrych. "Leachability of nitrided ilmenite in hydrochloric acid." (2010): http://hdl.handle.net/10204/5124Swanepoel J, Van Vuuren D, Heydenrych M, Leachability of nitrided ilmenite in hydrochloric acid; 2010. http://hdl.handle.net/10204/5124 .TY - Conference Presentation AU - Swanepoel, JJ AU - Van Vuuren, DS AU - Heydenrych, M AB - Titanium nitride in upgraded nitrided ilmenite (bulk of iron removed) can selectively be chlorinated to produce titanium tetrachloride. Except for iron, most other components present during this low temperature (ca. 200 °C) chlorination reaction will not react with chlorine. It is therefore necessary to remove as much iron as possible from the nitrided ilmenite. Hydrochloric acid leaching is a possible process route to remove metallic iron from nitrided ilmenite without excessive dissolution of species like titanium nitride and calcium oxide. Calcium oxide dissolution results in unrecoverable acid consumption. The leachability of nitrided ilmenite in hydrochloric acid was evaluated by determining the dissolution of species like aluminium, calcium, titanium and magnesium in a batch leach reactor for 60 minutes at 90 °C under reflux conditions. The hydrochloric acid concentration (11%, 18% and 25%), initial acid-to-iron mole ratio (2:1, 2.5:1 and 3.3:1), and solid-to-liquid mass ratio (1:8.33 to 1:2.13) were varied. The results indicate that a hydrochloric acid concentration of 25 wt. % supplied in a 2:1 acid-to-iron mole ratio would produce the most favourable upgraded nitrided ilmenite product. The dissolution of iron in this solution reached 97 percent after only 60 minutes. The total dissolution of calcium and titanium species was 0.01 and 0.11 wt. % respectively. Hydrochloric acid can therefore be used as lixiviant to remove metallic iron from nitrided ilmenite. DA - 2010-10 DB - ResearchSpace DP - CSIR KW - Titanium nitride KW - Upgraded nitrided ilmenite KW - Hydrochloric acid leaching KW - Metallic iron dissolution LK - https://researchspace.csir.co.za PY - 2010 SM - 0038-223X/3 T1 - Leachability of nitrided ilmenite in hydrochloric acid TI - Leachability of nitrided ilmenite in hydrochloric acid UR - http://hdl.handle.net/10204/5124 ER -