Highly metallised low Sulphur Directly Reduced Iron from Iron Ore Slime and Rejected/Middling Coal

1.

Title of Product/Design/Equipment

Highly metallised low Sulphur Directly Reduced Iron from Iron Ore Slime and Rejected/Middling Coal

Directly Reduced Iron

2.

IPR Status

Patent/Abroad IPR Details

Patent Application No: 1320/KOL72013 & 1345/KOL/2013

 

3.

Application/Uses

Iron and steel making

 

4.

Salient Technical Features including Competing Features

The process utilises ~100% waste materials to yield a value added product. This invention is useful for converting steel plant wastes fines / mining waste fines such as iron ore slime/fines, middling and rejected coal containing more than 25 % ash into a highly metallised (Metallisation > 96%) low Sulphur (0.006%S) DRI suitable for induction furnace, electric arc furnace and blast furnace for iron and steel making.

5.

Level/Scale of Development

Laboratory scale: 1 to 5 kg

6.

Environmental Considerations

Generation of 150-200 kg of coal char per ton of DRI

No liquid effluent generated.

7.

Status of Commercialization

Ready for commercialization

8.

Major Raw Materials to be Utilized

(i) Waste / lean iron ore fines such as iron ore slime (ii) Waste / lean grade coal containing 25 to 65% ash such as Middling Coal,

Rejected Coal and likewise.

9.

Major Plant Equipment and Machinery Required

(i) Muffle furnace or Tunnel Kiln, (ii) Ceramic crucibles, (iii) Pelletizer etc.,

10.

Techno-Economics

Cost of the DRI produced to be approximately Rs. 13,000 / ton.

Chemical requirement cost is about Rs.

against product cost of about Rs.

per ton of iron oxide production.

 

11.

Technology Package

Complete flow-sheet with mass balance, Equipment details, Process description, Cost estimate and Product specification. Assistance in setting up the plant as per organization terms and conditions

 

Chemical requirement cost is about Rs. 30.9 against product cost of about Rs. 1.25.9 per ton of iron oxide production