Reduction in Sinter Return Fines at Tata Steel  

Oleh:

Mitra, Debanik ; Mahato, B S ; Dwivedi, B K ; Sinha, Moni ; Chakraborti, Ujjal ; Deshpande, D P

Jenis: Article from Proceeding
Dalam koleksi: Asian Network for Quality (ANQ) Congress 2011, Ho Chi Minh City, Vietnam, 27-30 September 2011, page 1-11.
Topik: Iron Ore Sinter; Sinter Return Fines; Blast Furnace; Sinter Strength
Fulltext: IN28_Reduction in Sinter Return Fines at Tata Steel.pdf (583.38KB)

Isi artikel

Iron ore sinter is the principal iron bearing burden in modern blast furnaces. In Tata Steel, sinter constitutes nearly 70% of burden. It helps in achieving high productivity in furnace with lower fuel rate and lower cost at the same time. The required feed size of sinter is 5-50 mm. As sinter fines (-5 mm) cause resistance to gas flow inside blast furnace, it is screened out at furnace before being charged. This ‘return sinter’ is then recycled through the sintering process incurring additional cost and loss of throughput. The amount of sinter return fines from G blast furnace was 25% during the first half of FY11. A study was conducted to discover the mechanism and fundamental laws governing sinter strength. Number of experiments was conducted in the shop floor which revealed many unknown facts. Results were analysed using advanced statistical tools. To explore the statistical inference further, a special study of sinter was conducted at R&D which led to the discovery of scientific knowledge. Finally, the learning has been converted to an implementation plan in the shop floor. The benefit after implementation is 6% drop in sinter return fines from G BF which amounts to a saving of Rs 35 crores per annum.

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