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The commercial chloride process is carried out in a fluidized bed reactor at high temperature (above I000℃), which places strict limits on the presence of alkaline earth metals in the feedstock.This is because ores that contain excessive amounts of impurity oxides, e.g., calcium oxide >0.2% or magnesia >1%,form their liquid metal chlorides that would cause defluidization and fusion of the bed because the temperature is higher than the melting point of the alkaline-earth metal chlorides[1].