| 摘要 |
Iron carbide is produced by an apparatus comprising first fludized bed reactor 4 and second fluidized bed reactor 5, wherein the charged grainy iron oxide is reduced and carburized by the high temperature and high pressure gas being introduced from the bottom of the reactor. Both fluidized bed reactors comprise chamber 23 for introducing gas into the reactor, distribution plate 27 having multiple gas-introducing nozzles 28, partition plate 26 partitioning the fulidized bed into plural division rooms, and gas supply inlet 25a, 25b arranged on chamber 23 for supplying gas to specific division room respectively. Each gas supply inlet is connected to gas supply line having a gas flow control valve for controlling gas pressure or gas flow rate. There is provided with a gas circulation loop having a quenching tower 10a, 10b and cooler 12a, 12b which eliminate dust contained in the exhaust gas of the reactor, and having a preheater 15a, 15b for heating the gas, wherein the exhaust gas is returned to the chamber by way of quenching tower, cooler and preheater. Using the above apparatus, a grainy iron oxide is reacted with gas and iron carbide is produced by the steps of; charging a grainy iron oxide from a side wall of fluidized bed reactor 4, 5; reducing and carburizing the grainy iron oxide under floating and fluidizing by high temperature and high pressure gas being introduced from the bottom of the reactor; transferring the grainy iron oxide from the division room of the upstream side to the division room of the downstream side via a communication space located at either upper or lower part of the partition plate under fluidizing; discharging produced iron oxide from the final division room. <IMAGE> |
