Optimal proportion of titanium, magnesium and aluminum in blast furnace slag
[China Aluminum Network] Blast furnace slag performance has a significant impact on blast furnace production and product quality, while slag performance is closely related to its chemical composition. Titanium, magnesium and aluminum are common elements in the slag, and the change of the mass fraction has a great influence on the slag viscosity, melting temperature and desulfurization. In recent years, there have been numerous studies on the influencing factors of slag properties by scholars at home and abroad. However, in the CaO-Al2O3-SiO2-MgO-TiO2 five-component slag system, the effect of titanium, magnesium and aluminum on the slag properties and the preferred ratio have not yet been achieved. Clear conclusions.
Researchers at North China University of Technology studied the effects of titanium, magnesium, and aluminum on slag viscosity, melting temperature, and desulfurization using the slag at the Chenggang site. The results show that in the CaO-Al2O3-SiO2-MgO-TiO2 five-component slag system, titanium, magnesium and aluminum have a great influence on the slag properties. With the increase of MgO mass fraction, the melting temperature decreases first and then increases, and the viscosity decreases. The desulfurization capacity first increases and then decreases. With the increase of Al2O3 mass fraction, the melting temperature decreases first, then increases, and the viscosity changes are complex. The desulfurization capacity decreases; with the increase of TiO2 mass fraction, the melting temperature and viscosity show an upward trend, and the desulfurization capacity decreases. When the basicity of slag is 1.12, the suitable composition of slag is: MgO mass fraction is about 13.95%, Al2O3 mass fraction is about 13.75%, TiO2 mass fraction is controlled below 10.57%. Reasonable control of the ratio of titanium, magnesium and aluminum in the slag has important significance for improving the slag performance and improving the blast furnace production.
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