Finex Process for Liquid Iron Production Feb20

Finex Process for Liquid Iron Production...

             Finex Process for Liquid Iron Production  For the production of liquid iron Finex process was developed jointly by Siemens VAI and the South Korean company POSCO. This process has been based on the direct use of iron ore fines and non coking coal.  Siemens VAI and POSCO are jointly developing this process since 1992. Initial Work The basic laboratory scale research had been done with a 15 tons/day bench scale unit from 1992 to 1996. The results of this unit were used for the test operations of a 150 tons/day pilot plant in 1999. The Finex demonstration plant of 0.6 million tons per annum was built in Pohang works of POSCO and started production in June 2003. This plant has three fluidized bed reactors. Since February 2004, the demonstrated plant steadily produced at a rate of more than 0.7 million tons per annum of hot metal. Commercial Operation Construction of the first commercial plant of capacity 1.5 Mpta started in August 2004 and was commissioned in May 2007. Within the first year of its commissioning the plant reached its stable operation and the stabilized parameters given in Table 1have been achieved. The process is based on direct reduction of iron ore in fluidized beds and then melting of this reduced iron. The commercial plant has used 4 nos. fluidized bed reactors for pre heating and pre-reduction of iron ore and a melter gasifier which is similar to melter gasifier used in the Corex process. Table 1:- Parameter Achieved in Commercial Plant Sl.No. Parameter Unit Value 1 Production rate Mtpa 1.5 2 Availability % 96.8 3 Coal rate Kg/tHM 710 4 PCI rate Kg/tHM 160 5 C in Hot Metal % 4.5 6 S in Hot Metal % 0.03 7 Si in Hot Metal...