Basicity of slag

Table I. shows that the basicity of slag is about 0.25, the grade of Ti02 is over 45%. The X-ray result shows that the major phase of material are iron magnesimn tilanate, magnesium aluminate spinel.

The experimental temperature is 1823K. Smelting constant time is 15 minutes. Reduction agent is 3 percent. The results are illustrated in Figure 2 and Figure 3. X-ray of difference basicities of slag are shown in Figure 4. 

Figure 2. Effects of basicity of slag on the recovery of vanadium and iron... 

Ceramicists and physicists have studied the structures of silicate glasses and have interpreted the results in terms of characteristics such as the size, polarizability, and coordination number of the ions, whereas metallurgists have employed a less quantitative description in terms of the acidity or basicity of the components constituting the slag.424... 

These four component systems, designated as Simplified "Western" slags in Table II, are relatively well behaved in terms of alkali vaporization and are useful model systems for sub-bituminous basic coal slags. The data have been cast in analytical form, as summarized in Table II. 

Empirical rules have been formulated(4"2) for the estimation of melting range on the basis of the basicity of the slag or ash. However the various constants used in the calculations are applicable to very narrow compositional ranges and thus a large number of constants are required to represent the slags formed from different coals. 

The formal basicity of a slag is expressed as the difference in the equivalent concentrations of basic and acidic oxides in it, e.g. ... 

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