Entrained-Flow Chlorination of Titaniferous Slag to Produce Titanium Tetrachloride

摘要

Preparation of titanium tetrachloride was investigated by chlorination of a low-grade titaniferous slag in an entrained-flow reactor over the 550 to 1100 deg C temperature range. Chlorination rates were highly dependent on the reactivity of the carbon used in the chlorination reaction. Use of a lignitic char resulted in the higher chlorination rates, whereas use of petroleum coke resulted in lower reaction rates. Use of bituminous coke gave intermediate chlorination rates. Above 700 deg C, the chlorination reaction rate is controlled by mass transfer. Chlorine is completely reacted in 2.5 seconds at 1100 deg C using slag/char feedstocks of 7-#mu#m median particle diameter, with 10 to 25 pct excess carbon and 15 to 20 pct excess slag.