Binary slag basicity

KEYWORDS SiOj—NajO binary slag, glassy state, 0 K X-ray emission spectmm, paitid density of states as a fimction of NajO content, basicity... 

In the Table V, it is presented the different slag compositions calculated, based on the mass balance with low-grade hematite ore, and in the Table VI is presented the different characteristics of each sample such as binary and quaternary basicity, liquidus temperature, the final percentage (slag-metal), etc. 

Table VI. Characteristics of binary and quaternary basicity, liquidus temperature and the final percentage of slag used with low-grade hematite ore.

Slags Binary Basicity Quaternary Basicity T liquidus[ % mass (Siag/metai)... 

Eigure 3 shows the effect of binary basicity on the vanadium distribution between hot metal and slag. As shown in this figure, both the vanadium distribution ratio and the equilibrium reaction rate will be increased with increasing binary basicity. 

By comparing Fig.2(a), Fig.3(a) and Eig.4(a), It is remarkable that the effect of temperature on vanadium distribution is much stronger than that of other factors. Ti02 content in slag is the second significant effect factor and binary basicity has little effect on vanadium distribution. 

High binary basicity will contribute to vanadium reduction due to the double functions of lime. Lime reacts with Si02 so the reaction between V2O3 and silieon is improved, and the forming of Ti(C,N) will be prevented as lime reaets with Ti02, whieh is favorable for vanadium diffusion from slag to hot metal. 

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