WHAT IS CALIMED IS:
1. A method of manufacturing ferrochrome, comprising the steps of:
drying fine chrome ores;
heating the dried fine chrome ores;
5 preliminarily reducing the heated fine chrome ores;
mixing a flux with the fine chrome ores;
manufacturing compacted iron after mixing the flux with the pre-reduced fine chrome ores; and
charging the compacted iron into a smelting-reduction furnace and 10 melting and reducing the charged compacted iron by combusting carbonaceous materials.
2. The method of claim 1, further comprising the step of sorting
granularities of pieces of the compacted iron before charging the compacted
15 iron into the smelting-reduction furnace.
3. The method of claim 2, wherein the compacted iron having a
granularity of 5 mm or higher through the sorting is charged into the smelting-
reduction furnace, and the compacted iron having a granularity of less than 5
20 nun through the sorting is charged into a drying furnace again.
4. The method of claim 1, wherein the flux is mixed with the fine chrome
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ores before the flux enters at least one step selected from the steps of drying fine chrome ores, heating the dried fine chrome ores, preliminarily reducing the heated fine chrome ores, and compacting the fine chrome ores.
5 5. The method of any one of claims 1 to 4, wherein metallic Fe including at
least 20 wt% is formed in a surface of the fine chrome ores by way of the preliminary reduction.
6. The method of claim 5, wherein the flux mixed with the fine chrome
10 ores is at least one selected from lime, quicklime, dolomite, and silica.
7. An apparatus for manufacturing ferrochrome, comprising:
a drying furnace for drying fine chrome ores;
a heating furnace for heating the dried fine chrome ores;
15 a pre-reduction furnace for preliminarily reducing the heated fine
chrome ores;
a flux supply device for supplying a flux to the fine chrome ores;
a compacting device for manufacturing compacted iron by compacting
the pre-reduced fine chrome ores; and
20 a smelting-reduction furnace for receiving the compacted iron and
melting the received compacted iron by combusting carbonaceous materials.
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8. The apparatus of claim 7, wherein a granularity of the fine chrome ores
is 8 mm or lower.
9. The apparatus of claim 7, wherein the flux is mixed with the fine
5 chrome ores and charged into at least one selected from the drying furnace, the
heating furnace, and the pre-reduction furnace.
10. The apparatus of claim 7, wherein the drying furnace, the heating
furnace, and the pre-reduction furnace are fluidized bed furnaces.
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11. The apparatus of claim 7, wherein a granularity of the compacted iron is
5 mm to 30 mm.
12. The apparatus of any one of claims 7 to 11, further comprising a
15 granularity sorting device for sorting the granularity of the compacted iron
before charging the compacted iron into the smelting-reduction furnace.
13. The apparatus of claim 12, wherein the compacted iron having a
granularity of 5 mm or higher, from among pieces of the sorted compacted iron,
20 is charged into the smelting-reduction furnace by way of a conveyance device, and the compacted iron having a granularity of less than 5 mm, from among the
pieces of sorted compacted iron, is charged into the drying furnace by way of
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the conveyance device.
14. The apparatus of claim 13, wherein metallic Fe content of the fine
chrome ores reduced by the pre-reduction furnace is 20 wt% or higher of total
5 fine chrome ores.
15. The apparatus of claim 14, wherein the carbonaceous materials
combusted by the smelting-reduction furnace are at least one selected from coal,
coke, and coal briquet.
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16. The apparatus of claim 15, wherein reducing gas generated from the
smelting-reduction furnace is sequentially blown into the pre-reduction furnace,
the heating furnace, and the drying furnace via a gas conduit.
15 17. Compacted iron for manufacturing ferrochrome, compacted by being mixed with a flux to accelerate a melting of fine chrome ores comprising metallic Fe formed by pre-reduction.
18. The compacted iron of claim 17, wherein content of the metallic Fe 20 formed in the fine chrome ores by the pre-reduction is at least 20% in a total weight of the fine chrome ores.
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19. The compacted iron of claim 17, wherein the flux is at least one selected from lime, quicklime, dolomite, and silica.
20. The compacted iron of claim 17, wherein an amount of the flux included 5 in the compacted iron is 10 wt% to 30 wt% of a total weight of the compacted
iron.
21. The compacted iron of claim 17, wherein:
a composition of the compacted iron comprising the flux satisfies an 10 equation below.
(CaO+MgO)/ (Si02+Al203) = 0.74-1.04
22. The compacted iron of any one of claims 17 to 21, wherein:
a composition of the compacted iron comprising the flux satisfies an 15 equation below.
(CaO/Si02) = 0.8-1.28, (CaO+MgO)/ Si02 = 1.18-1.64.



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Dated this 20th day of May, 2013

Priy&nkh Chopra Of KVs Partners Agent for the Applicants

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