| 摘要 |
Provided is a production method for coal briquettes which are charged into and rapidly heated in the dome part of a melting and gasification furnace, into which reduced iron is charged, in a molten iron production device comprising the melting and gasification furnace and a reduction furnace which is connected to the melting and gasification furnace and to which the reduced iron is provided. The production method for coal briquettes comprises the steps of i) providing pulverized coal, ii) producing a mixture obtained by the mixing of between 1 and 5 parts by weight of a hardening agent and between 5 and 15 parts by weight of a binder with respect to 100 parts by weight of the pulverized coal, and iii) moulding the mixture. In the step of providing the pulverized coal, the pulverized coal comprises i) more than 0 and no more than 50 wt% of low-grade coal, and ii) a balance of coal ash. The low-grade coal has between 25 wt% and 40 wt% of a volatile fraction (dry basis) and has a crucible swelling number of more than 0 and less than 3. |
