中低钛型高炉渣脱硫能力研究

Research on Desulfurization Capability of Medium &Low-titanium BF Slag

以宣钢现场渣为基准,研究了中低钛高炉炉渣的脱硫能力。研究结果表明:在CaO-Al2O3-SiO2-MgO-TiO2五元渣系中,碱度、Ti、Mg、Al对炉渣性能的影响较大。炉渣脱硫能力随着碱度的增加呈升高趋势。同一碱度下,TiO2含量的增加,不利于炉渣脱硫。当炉渣碱度为1.1时,炉渣MgO含量控制在10.00%左右,炉渣Al2O3含量控制在12.00%左右,脱硫效果较好;随着渣中Ti含量的升高,适当增加MgO含量,减少Al2O3含量,有利于脱硫反应的进行。合理控制炉渣参数,对降低生铁硫含量,提高炉渣脱硫能力具有重要意义,也为高炉生产提供理论依据。

The desulfurization capability of medium-titanium and low-titanium BF slag in Xuangang was investigated. The results show that basicity,Ti,Mg and Al have important effect on the desulfurization of slag in the CaO-Al2O3-SiO2-MgO-TiO2 slag system. With basicity increasing,desulfurization capability of slag increases. For a certain basicity,increasing the content of TiO2 will bring negative effect on desulfurization. When the basicity of slag is 1. 1,the suitable slag composition with near 10. 00% of MgO and -12. 00%,of Al2O3 is beneficial to desulfurization. Increasing MgO content and decreasing Al2O3 content appropriately are good for desulfurization as Ti content increases. Controlling the slag parameters reasonably is important for reducing the sulfur content of cast iron and improving desulfurization capability of slag.