Patent ID: 9695492
Date: 2017-07-04
CPC Classifications: C21B,C21C,C22B,C22C,Y02P

Claim:
1. A method for producing a high purity high carbon molten chrome product from chrome and carbon bearing material, said method comprising the steps of: (a) continuously introducing chrome compacts directly into an electric melter; (b) heating and melting the chrome compacts in the electric melter to form high carbon molten chrome; (c) preventing oxidation of the high carbon molten chrome via minimization of the ingress of oxygen containing gas in said heating step; (d) carburizing the high carbon molten chrome to form high carbon molten metallized chrome; (e) purifying the high carbon molten metallized chrome by reducing silicon oxides to silicon and desulfurizing the high carbon molten metallized chrome to produce the high purity high carbon molten chrome product; (f) controlling a silicon level in the electric melter by adding carbon to the electric melter, wherein some carbon is added to the electric melter with the chrome compacts via a pre-reduction furnace and additional carbon is added to the electric melter from a source separate from the chrome compacts and the pre-reduction furnace; and (g) discharging the high purity high carbon molten chrome product from the electric melter.