The reduced iron is charged into the melter-gasifier, and is connected to a gasification and melting in the molten iron manufacturing apparatus including a reduction to provide a reduced iron it provides a process for the preparation of seonghyeongtan that rapid heating is charged into the dome of the melter-gasifier. Method of producing seonghyeongtan includes providing a i) fine coal, ii) providing a syrup, iii) providing a step, a mixture by the addition of molasses and raw sugar solution in iv) of pulverized coal to provide a solution of raw sugar, and v) forming a mixture includes the step of providing a seonghyeongtan.