Method of manufacturing direct reduction iron and reduction firing apparatus

摘要

The present invention provides a method of manufacturing direct reduction iron and a reduction firing apparatus. The apparatus may be a dual-chamber stepping reduction 5 furnace, a single chamber stepping reduction furnace or a single hearth down-draft reduction furnace, wherein the dual-chamber stepping reduction furnace includes a left chamber, a right chamber, a material containing device, a step mechanism, a slag distributing device, a charging device, heating burners, a fume extraction path, a charging device, a material receiving tank having a sealing cap and a slag discharging 10 path. The method mainly includes the following steps: distributing and charging the slag in the material containing device; carrying and sending the material containing device through a preheating station, a heating station and a reduction station sequentially by the step mechanism; meanwhile, heating the material to be reduced by a combustion of the fuel with the heating burners; discharging the reduced material into the material 15 receiving tank having the sealing cap from the material device; placing the material device from which the material is discharged into the feeding side of the other chamber, then a next work circulation begins. The present invention has features such as a small limitation of resources shortage, low energy consumption, a low-carbon environment, high production efficiency, a low production cost, a high metallization rate, a long life 20 span of the apparatus and a wide range of production applicability and so on. Fig. I L' 4:40 cn-