To extract the tungsten component from the scheelite by the chlorination process, effects of major variables such as the reducing agent, reaction temperature, reaction time, flow rate of the Cl₂ gas, and the particle size of the sample, were examined in the batch-boat system. The optimum conditions for this chlorination process were as follows ; reaction temperature above 700℃, carbon weight ratio to the scheelite 0.08, reaction time 20 min, flow rate of the Cl₂ gas 0.6ℓ/min, particle size of scheelite ore -200 mesh. Under the above conditions, 99% of tungsten component was extracted from scheelite ore. The diffusion step and chemical reaction step were the rate-determining steps at high and low temperature, respectively. Activation energy was 7.98kca1/mo1 at high temperature region and 31.2kca1/mol at low temperature one.