Thermodynamic Interaction between Chromium and Sulfur in High Cr Containing Liquid Iron

Abstract

Thermodynamic interaction between chromium and sulfur in liquid iron was studied using the slag/ metal equilibration technique to measure the effect of chromium on the equilibrium sulfur distribution between the slag and carbon saturated Fe-Cr-S alloys containing chromium up to 30 mass% in the temperature range from 1 823 K to 1 923 K. The sulfide capacity of the CaO-Al2O3 slag was separately determined using carbon saturated liquid Fe-S alloys under CO atmosphere as a function of temperature. The sulfur distribution decreases with chromium content and increases with melt temperature significantly. The specific effect of chromium on the activity coefficient of sulfur in liquid Fe-Csat.-Cr-S alloys was determined by considering the effect of carbon on sulfur at carbon saturation. The interaction parameters determined in the present study were compared with the previous data determined by the gas-metal equilibration technique using a H2S-H2 gas mixture.

Optimization of operating conditions in desulfurization of petroleum coke using induction heating

“…The results of this section of experiments are in agreement with the outcome of other references dealing with high-temperature H 2 S decomposition, 29 H 2 S reaction to metal oxides, 30,31 and H 2 S-iron interactions. 32 Do et al 33 examined the effect of Cr in Fe─C─S systems in 1550-1650 C, and the results showed that the sulfide ion (S 2− ) is transferred to the metal framework as an ultrastable compound leading to less H 2 S emission. Radenovic 34 studied the chemical shift of organo-sulfur compounds in the petroleum coke upon heating to 1500 C, 2000 C, and 2400 C, and the reaction time was set to 2 and 4 hr.…”