Method for starting up plant for producing fine coke

In a process for producing fine coke in a plant system including a mixing unit, by mixing high bituminous lignite coal with hot fine coke in said mixing unit and degassing the high bituminous coal, said hot fine coke serving as a heat carrier and being circulated through said system, the improvement comprising introducing inert gas into the mixing unit along with the hot fine coke prior to the introduction of the high bituminous lignite coal, and circulating said inert gas and said hot fine coke through said system, whereby a cold parts of said system are heated up so as to minimize condensation of tar generated in the production of said fine coke in said system.