text: Chloridizing roasting transforms certain metal compounds to chlorides through oxidation or reduction. Some metals such as uranium, titanium, beryllium and some rare earths are processed in their chloride form. Certain forms of chloridizing roasting may be represented by the overall reactions:
  :2NaCl  +  MS  +  2O   ->    NaSO  +  MCl,
  :4NaCl  +  2MO  +  S  +  3O  ->  2NaSO  +  2MCl
  The first reaction represents the chlorination of a sulfide ore involving an exothermic reaction. The second reaction involving an oxide ore is facilitated by addition of elemental sulfur. Carbonate ores react in  a similar manner as the oxide ore, after decomposing to their oxide form at high temperatures.