Increase of BOF Converter Life by Own Slag Coating
Journal Title: Analele Universitatii "Dunarea de Jos" din Galati. Fascicula IX, Metalurgie si Stiinta Materialelor - Year 2012, Vol 35, Issue 3
Abstract
This paper presents a method for the improvement of the lining life of the BOF converter by slag coating, under nitrogen pressure. Own slag coating of converter lining is put in practice after steel tapping. Dolomite blocks are used like standard wear converter lining. Nitrogen blowing for own slag coating is carried out by oxygen lance. After steel tapping without slag, the converter is tilt in blowing position and the oxygen lance is let down in the lowest position. The nitrogen is blown under 10-12 barr pressure and 450-500 Nm3 /min rate, for 3 minutes. By this slag coating technology the performance of refractories has been improved from about 370 heats per campaign in reference year to about 800 heats per campaign at the end of two years of experiments, and therefore refractory consumption decreased from 5.25 kg/t under 3.00 kg/t and the cost of converter refractories decreased by 0.24 $/t. Another variant for improvement of the BOF converter lining life was the use of magnesia bricks for selective lining areas (trunion rings area and charging mouth). The own slag coating technology has been used also. In the case of this variant, the lining life of converter has been improved to about 800 heats per campaign at the end of two years of experiments and so the refractories consumption decreased under 2.45 kg/t. Because of the higher price of magnesia bricks and of the lower price of dolomite blocks, the cost for converter refractories has decreased only by 0.02$/t.
Authors and Affiliations
Viorel MUNTEANU, Dan ZORLESCU
Keywords
Related Articles
- EP ID EP618487
- DOI -
- Views 84
- Downloads 0
Deposition Technologies for Obtaining Thin Films with Special Properties
The properties of metallic materials can be improved by deposition of materials. The coating has a tear strength and better hydro-abrasive corrosion. The thin layer deposition has a thickness of less than 10 micrometers....
Electrochemical Deposition and Characterization of Doped Poly (3,4-Ethylene Dioxythiophene) for Potential Use as a Biosenso
In this study, conducting polymer films of poly(3,4-ethylenedioxythiophene) (PEDOT) were electrodeposited onto a platinum electrode from an aqueous micellar medium. The electroactivity of the undoped and doped PEDOT film...
Predicting of Remaining Eutectic Carbide Content in W1.4855 Steel as Function of Carbon Content and Heat Treatment Parameters
The relationship between the carbon content of W1.4855 steel, and the parameters of heat treatment of solution quenching (maintaining time and maintaining temperature) is investigated. The obtained experimental data are...
Behavior of Some Stainless Nitrided Austenite Steel Types to Corrosion and Abrasion
By nitriding, stainless austenite steel types can become surface hardened. Hardness can be greater at more than 1000 HV005 when the composition layer made of complex nitrides is obtained and more reduced till 500 HV005 w...
Mathematical Model Cooling Agglomeration Ferrous in Layer
Mathematical model is based on discretization agglomeration areas layer deposited on very small. The τ Δ cooling time and the elements of space and elements xi time relationship is discretization as volume control. Based...