The
smelting reduction processes of sheelite,
molybdenum oxide and vanadium
slag were considered by thermodynamic and kinetic calculation and analysis. Sheelite, molybdenum oxide and vanadium slag can be reduced by C, CaC_2, Si-Fe and SiC in the smelting reduction process. The reduction processes consist of solid-solid reaction, liquid-solid reaction,
reaction in molten steel and liquid-liquid reaction. The technology can realize
fast reduction in low temperature, control amount of slag and restrain boiling during reduction stage. The diffusion of WO_3 is the restrictive step of reduction process of WO_3. Improving fluidity of slag and enlarging areas of reaction interface can accelerate the reduction process of WO_3. The use of damping agent can restrain volatilization of molybdenum oxide effectively. Industrial trial of making of M-2
high speed steel with oxide was conducted successfully in 20t AC-EAF. The quality of final steel is excellent. This process has the advantages of shortening working procedure, economizing resources, minimizing energy consumption and improving environment. All consequences can save the cost of 1 780 yuan per ton.
More abstracts about the Smelting reduction process of high speed steel