Process for the preparation of high grade synthetic rutile and pig iron
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United States of America Patent
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Oct 23, 2001
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N/A
app pub date -
Mar 24, 2000
filing date -
Mar 24, 2000
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Abstract
The present invention relates to an improved process for the preparation of high grade synthetic rutile from ilmenite with pig iron as a by-product. The process comprises subjecting ilmenite to reduction with coal, cooling and removing unreacted coal to obtain a product having 80-95% metallization, smelting the metallized ilmenite mixed with less than 10% carbon (w/w) in a transferred arc plasma using arc current, under flow of inert gas for a fixed time. The metal is then separated as pig iron and TiO.sub.2 as slag, the slag ground followed by oxidation at high temperature in the presence of an oxidizing gas, the oxidized product being leached with dilute HCl followed by filtration, washing and drying to obtain synthetic rutile.
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