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Optimization Studies of Hot Metal Desulphurized and Basic Oxygen Furnace Slags in Sinter Making at JSW Steel Limited


Optimization Studies of Hot Metal Desulphurized and Basic Oxygen Furnace Slags in Sinter Making at JSW Steel Limited
Authors : Sharanappa Kalshetty, Rudramuniappa MV, Ratnakar Bonda , VR Sekhar
Publication Date: 11-09-2017

Authors

Author(s):  Sharanappa Kalshetty, Rudramuniappa MV, Ratnakar Bonda , VR Sekhar

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Volume. 6 - Issue. 09 , September - 2017

e-ISSN:   2278-0181

 DOI:  http://dx.doi.org/10.17577/IJERTV6IS090070

Abstract

A large amount of various slags are being generated from steel melting process in integrated steel plants. Disposal of large quantities of slag becomes a big environmental concern. Slags generation from Steel Melting shop such as LD and HMDS Slag these slag has free CaO, which can replace some amount of flux in Iron Making burden. But due to high Phosphorous content in LD slag and high Sulphur in HMDS, these slags are not directly used in sinter making. In agglomeration these slags usage could be the ideal approach to maximize its use in sinter feed and thereby increase in the productivity and quality of the sinter plant which will reduce the cost of production due to available free Cao and Fe %. The process of micro-pelletisation followed by sintering may be considered for their utilization in the steel plants. In this paper an attempt has been made to compare the HMDS and LD Slag in sinter making through micro pelletisation route. It is shown encouraging results w.r.t to physical and chemical properties of sinter as desired by customer i.e. Blast furnace. Hence its is desired to use HMDS slag as substituent to LD Slag in iron ore sinter making .Thus, recycling of HMDS slag through the sintering process recovers lime, iron and magnesia and thereby saving of flux material and iron ore in future. Detailed Investigation was carried out through lab scale studies for estimating the maximum permissible limits of usage of LD Slag and HMDS slag in sinter making and to know the influence of addition on Tumbler Index and Phosphorous and Sulphur properties from low level 0 kg/Ton to High level 60 kg/t of sinter. From the test results it was found that 35kg/Ton - 40 kg/Ton will be the optimum level for usage in sintering with HMDS to get desired properties of the sinter as per the customer requirement which in turn helps in reduction of production cost the results are validated through Hypothesis testing two sample T Test.

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