Chlorine in salt

Table VIXT.—Solubility of Chlorine in Salts Solutions.

Chlorination in salt melt. For chlorination in melted salts, it is especially important to use raw titanium with large quantities of the impurities (calcium, magnesium, manganese oxides) which form low-melting chlorides in the process. The medium is a melt of potassium ans sodium chlorides (the eutectic mixture of these salts melts at 660 °C). 

Thus, the chlorination of titanium raw stock in salt melt helps to build very productive apparatuses and avoid labour-intensive operations of preparing and backing bricks, partially increases the conditions for further condensation of the vapour and gas mixture, considerably reduces the concentration of carbon oxide in outlet gases and helps to withdraw the non-chlorinated residue from the reactive zone continuously. Disadvantages of chlorination in salt melt include increased losses of titanium with discharge melt (because small particles of the furnace charge are carried away with reaction gases) and increased amounts of solid chlorides. 

The choice of the chlorination technique and equipment for the process greatly depends on the compositon of raw stock for chlorination. For shaft furnaces and fluidised layer apparatuses, it is advisable to chlorinate titanium raw stock with relatively small amounts of oxides of calcium, magnesium, manganese and other metals which form low-melting chlorides in chlorination. On the other hand, in chlorination in salt melt these oxides do not have any significant effect on the process. 

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See also in sourсe #XX -- [ ]

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