WHAT IS CALIMED IS
1. An apparatus for manufacturing molten iron, comprising:
a multi-stage fluidized furnace for converting fine iron ores into reduced fine iron by reducing fine iron ores;
at least one compacted iron manufacturing device for manufacturing high-temperature compacted iron by compressing the reduced fine iron;
at least one crushing device for crushing the high-temperature compacted iron at a specific granularity;
a first conveyance device for conveying the crushed high-temperature compacted iron; and
a smelting furnace for melting the conveyed high-temperature compacted iron by combusting fine or lump coal and supplying reducing gas generated within the smelting furnace to the multi-stage fluidized furnace.
2. The apparatus of claim 1, further comprising at least one compacted
iron storage tank for storing some of the crushed high-temperature compacted
iron.
3. The apparatus of claim 2, further comprising a second conveyance device for conveying the high-temperature compacted iron to the compacted iron storage tank.

4. The apparatus of claim 3, wherein:
2-direction suits are disposed under the at least one crushing device, first outlets of the 2-direction suits supply the crushed high-temperature compacted iron to the first conveyance device, and
second outlets of the 2-direction suits supply the crushed high-temperature compacted iron to the second conveyance device.
5. The apparatus of claim 2, wherein a nitrogen supply pipe is disposed at a bottom of the compacted iron storage tank.
6. The apparatus of claim 2, wherein gas discharge pipes are disposed at a top of the compacted iron storage tank.
7. The apparatus of claim 6, wherein the gas discharge pipes are
equipped with respective pressure control valves and configured to maintain
pressure within the compacted iron storage tank higher than atmospheric
pressure.
8. The apparatus of any one of claims 5 to 7, wherein the compacted iron
storage tank comprises a level system for detecting an amount of compacted
iron charged into the compacted iron storage tank.

9. The apparatus of claim 3 or 8, further comprising a third conveyance device, wherein discharge devices are provided under the compacted iron storage tank and configured to supply the compacted iron to the third conveyance device, and the third conveyance device conveys the compacted iron to the first conveyance device.
10. The apparatus of claim 1, further comprising a carbon dioxide removal device for ramifying some of exhaust gas discharged from the multi-stage fluidized furnace, removing carbon dioxide from the ramified exhaust gas, adding the exhaust gas to the reducing gas supplied from the smelting furnace, and supplying the added reducing gas to the multi-stage fluidized furnace.
11. The apparatus of claim 1 or 10, further comprising a gas circulation cooling device for controlling temperature of reducing gas supplied to the multi-stage fluidized furnace by ramifying some of reducing gas generated from the smelting furnace, cooling the ramified reducing gas, and circulating the reducing gas supplied from the smelting furnace again.
12. A method of manufacturing molten iron, comprising the steps of:
reducing fine iron ores into reduced fine iron by using a multi-stage fluidized furnace;
manufacturing high-temperature compacted iron by compressing the

reduced fine iron using a compacted iron manufacturing device;
crushing the high-temperature compacted iron by using a crushing
device;
conveying the crushed compacted iron to a charging device; and charging the compacted iron from the charging device into a smelting
furnace and melting the charged compacted iron by combusting fine or lump
coal.
13. The method of claim 12, further comprising the step of conveying some of the crushed compacted iron to a compacted iron storage tank.
14. The method of claim 13, further comprising the step of distributing the crushed compacted iron to the charging device or the compacted iron storage tank by using a 2-direction suits.
15. The method of claim 14, wherein:
if the high-temperature compacted iron necessary for the smelting furnace is able to be manufactured through the multi-stage fluidized furnace, the compacted iron manufacturing device, and the crushing device,
excess high-temperature compacted iron exceeding an amount of the high-temperature compacted iron necessary for the smelting furnace is manufactured, and

the excess high-temperature compacted iron is intermittently conveyed to and stored in the compacted iron storage tank by way of an action of the 2-direction suits.
16. The method of claim 13, wherein if the high-temperature compacted iron necessary for the smelting furnace is unable to be manufactured through the multi-stage fluidized furnace, the compacted iron manufacturing device, and the crushing device, the compacted iron stored in the compacted iron storage tank is continuously supplied to the smelting furnace via a conveyance device.
17. The method of any one of claims 12 to 16, wherein:
if a ratio of a yield of high-temperature compacted iron manufactured by the multi-stage fluidized furnace, the compacted iron manufacturing device, and the crushing device and demand quantity of high-temp era hire compacted iron necessary for the smelting furnace is defined by an excess rate as below,
the excess rate = (yield of the high-temperature compacted iron)/(demand quantity of the high-temperature compacted iron) x 100,
the excess rate is 110% to 120%.
18. The method of any one of claims 12 to 16, wherein a time that the high-temperature compacted iron stay in the compacted iron storage tank is 6 hours