Chlorination Behavior of Low-Grade Titanium Slag in AlCl3-NaCl Molten Salt

Aluminum chloride (AlCl3) is an effective chlorinating agent and catalyst for the chlorination of low-grade titanium slag to produce titanium tetrachloride in molten salts. In this paper, the chlorination behavior of low-grade titanium slag by anhydrous AlCl3 in AlCl3-NaCl molten salt was investigated. Thermodynamic analysis revealed that aluminum chloride can be an effective agent for low-grade titanium slag, and that the addition of NaCl can form a compound molten salt together with AlCl3 to prevent the evaporation of AlCl3.chlorination experiments were conducted on low-grade titanium slag in AlCl3-NaCl molten salt to investigate the effects of temperature and the amounts of aluminum chloride and sodium chloride added. Under optimized experimental conditions, the selective separation of titanium from the titanium slag was effectively achieved, and the extraction rate of titanium reached 79.6%. Other impurity elements in the form of oxides or chlorides remained in the residue. Finally, a reaction mechanism for the extraction of titanium from low-grade titanium slag in AlCl3-NaCl molten salt has been proposed.