本文在外热式煤基竖炉的研究基础上，提出预热预还原段采用内热式对流传热和终还原段采用外热式传导传热相结台的煤基竖炉直接还原新工艺，并设计建造了模拟试验装置．试验表明，模拟试验装置具有操作方便、控制可靠的特点，同时取得了C／Fe比为0．5时，预还原时间为30min、终还原时间为100min，金属化率大于95％的良好指标． Based on the research of external thermal coal-based shaft furnace, a new coal-based shaft furnace direct reduction process using internal thermal convection heat transfer and final reduction of external heat conduction heat transfer phase is put forward. Design and construction of simulation test equipment. The test shows that the simulation test device has the advantages of easy operation and reliable control. At the same time, the good indicator of the metallization rate is 95% when the C / Fe ratio is 0.5, the pre-reduction time is 30min, the final reduction time is 100min.