Jun 01, 2011 · Stainless steel slags and dusts were mainly present in the form of complex oxide and silicate and the most important metal elements, such as Cr and Ni, existing in the slag as the form of CrFeNiO spinel. The gangues played a dominant role in the stainless steel slags, but the complex metal oxides in the dust. 2.
B. ARH, F. TEHOVNIK:THE OXIDATION AND REDUCTION The oxidation of chromium during the elaboration of stainless steels occurs with oxygen in solution blown in the melt and with oxides in the slag. The loss of chromium during the steel bath processing increases the production costs and generates problems because of the high content of chromium oxide in the slag.
In the production of stainless steel, a slag is formed during the melting of the solid material in the electric arc furnace, which contains a high proportion of metal oxides, especially of chromium
Experimental Investigation on Reduction Kinetics of The optimal reduction result that all most all of the chromium in slag been recovered was obtained in temperature was 1500°C, basicity of slag was 1.01.2, the value of Al 2 O 3 +MgO was 25%. Keywords
MICROSTRUCTURAL CHARACTERISATION OF Key words:steelmaking slag, chromium oxide, microstructure, chromium slag reduction INTRODUCTION Chromium is an important alloying element, espe-cially in stainless steel grades, with chromium contents above 10 wt% . Chromium promotes the stability of ferrite in steel . The phase ratio between Fe and
The rate of reduction of chromium oxides in a stainless steel slag was studied in stagnant slag / metal melts at 1600 °C. The experimental results show that the magnesium contained in a FeMgSi ferroalloy has a reduction potential comparable to that of the silicon in a FeSi ferroalloy.
Reduction of chromium oxide containing slags using chromium content in the slag. It is therefore important to prevent the chrome oxidation from the scrape and reduce the chromium content in the slag using a reduction agent. A high chromium content in the slag will also lead to a crusty non-reactive slag, which prevents the formation of a foaming slag and this gives problems with the overall
Reduction of chromium oxides in stainless steel dust Jun 06, 2015 · Abstract. The recovery of metal oxides from stainless steel dust using C (graphite), SiFe, and Al as reductants was investigated under various conditions. The apparent distribution ratio of Cr ( L Cr m/s ) in the recovered metal and residual slag phases was defined as the major performance metric. The results show that the recovery ratio of metals increases as the ratio of CaO:SiO 2 by mass in the residual slag
One of the most efficient ways to eliminate the harm of chromium oxide in stainless steel slag is to reduce chromium oxide in stainless steel slag using aluminium.
THE OXIDATION AND REDUCTION OF CHROMIUM OF of stainless slags is decreased by low content of iron ox-ide and a high content of chromium oxide in the slag. Solidparticlesofchromiumoxideintheslagwithahigh melting point increase the slag viscosity and impair the foaming.BylowFeOcontentandbyslowkineticsofre-duction of chromium
US6478840B1 - Reduction of chromium content in slag The present invention relates to a method for reduction of chromium content in slag during melting of stainless steel in electric arc furnaces where steel scrap and additive alloys are melted in an