Production of sg grade pig iron by optimising slag chemistry in mini blast furnace

Mahato, M M and Agrawal, M K and Sinha, S N (2010) Production of sg grade pig iron by optimising slag chemistry in mini blast furnace. In: Proceedings of the XI International Seminar on Mineral Processing Technology (MPT-2010), Dec 2010, NML Jamshedpur, India.

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Abstract

The production of SG Grade Pig Iron used for roll production, Automobile grade pig iron and special castings is very critical particularly with respect to its chemical compositions. The requirement of sulphur content should be 0.040% maximum. The role of slag to produce such a low sulphur content pig iron is very important. Therefore, to control sulphur in SG Grade pig iron in Mini Blast Furnace the optimization of slag chemistry is an essential step. The present work has been carried out at Mini Blast Furnace of Tayo Rolls Limited, Jamshedpur. The working volume of Mini Blast Furnace is 64 m3 with pebble type stove and it produces 100–120 Tons of hot metal per day. The present investigation has been carried out to optimize slag chemistry to obtain required level of sulphur (0.020%–0.040% Max.) in hot metal. Slag samples were collected for analysis of Al2O3, SiO2, and CaO, MgO and FeO percentage. Respective hot metal samples were also collected for sulphur analysis. An optimization technique known as statistical method of Linear Regression or Linear Multiple Regression correlation has been applied to optimize the slag chemistry with respect to sulphur in hot metal. This technique has been adopted as it provides simple mathematical correlation between dependent and independent variables. This has also been verified by Numerical Computational Technique, which is found to be satisfactory.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/2659
Uncontrolled Keywords:Mini blast furnace, Pebbles type stoves, Slag chemistry, S.G. Grade pig iron, Hot metal.
Divisions:Mineral Processing
ID Code:2659
Deposited By:Mr. A.K. Sahu
Deposited On:22 Mar 2011 16:42
Last Modified:19 Aug 2015 14:33
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