采用与生产样品直径相同的试样，模拟隧道窑生产工艺制度，研究了反应罐法生产优质海绵铁的还原过程和加快反应速度的措施。整个还原过程呈现多核还原。控制还原温度上限、适宜内配碳量，可加快还原速度。装料方式加快还原速度的顺序为：平装、圆柱装、环形装。 The sample with the same diameter as the production sample was used to simulate the production process of tunnel kiln and the reduction process of high quality sponge iron by reaction tank and the measures to speed up the reaction were studied. The entire restoration process presents a multi-core reduction. Control the upper limit of the reduction temperature, suitable with carbon, can speed up the reduction. Loading speed up the reduction in the order of speed: paperback, cylindrical loaded, ring loaded.