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DRI from Iron Ore Fines
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DRI from iron Ore Fines & Coal is a new technology to use the waste iron ore fines and directly make DRI from it which can be further smelted to liquid iron. This is a new technology and replaces the present method of making Iron ore pellets fom fines and then converting the fines to DRI.
Iron ore is dried by using exhaust heat from waste gas of reduction rotary kiln. In accordance with the technical requirements to make the process: proportion – pellet making – sintering (in traveling grate – reduction – finished products (metallic pellets--MBI) handling – qualified Metallic Pellets. There are three manufacturing processes to make DRI from Iron ore fines;
The capacity of Tunnel Kiln is upto 30,000 tpa The capacity for Crucible Free Tunnel Kiln is upto 50,000 tpa The capacity for Grate Kiln is from 50,000 to 150,000 tpa Advantages of each. Tunnel Kiln is a tried and in use process. It uses Silicon Carbide Crucibles which need replacement. Is recommended for small capacities. Crucible Free Kiln is a new technology which eliminates the Silicon Carbide Crucible thus lowering the operating cost.Recommended for midsize capacities. Grate -Kiln Process uses new process to make the pellets by grate kiln. It can use iron ore fines having as low as 58% Fe and uses coal/coal gas to get the DRI. Is best for larger capacities. It also generates waste heat which can be used for production of electricity. |