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氧气侧吹转炉的特点之一是金属-炉渣界面处搅拌作用特别强烈,它促进了粘渣操作的使用。对比并分析了氧气侧吹转炉不同类型的终点炉渣,发现一些粘稠的炉渣基本上不侵蚀普通焦油白云石炉衬,在某种情况下还可以在炉衬砖上融接上长,控制处理得当,就有保护炉衬的作用。实践证明:采用粘渣操作有利于转炉炉龄的大幅度提高。讨论了氧气侧吹转炉冶炼间隙时期中炉内气氛的性质及其与炉渣的作用情况,从热力学角度上可以证明一些炉气对渣中FeO具有还原能力。在我们的情况下,当炉役平均终渣的∑(FeO)≤12％时,往往形成炉渣在炉衬表面融接上长,其原因主要是该种高熔点的终渣中FeO等低熔点组元被炉内气氛还原,使炉渣熔化温度进一步升高,由液态转变为固态所致。这类上长物的矿物组成主要是3CaO·SiO_2,2CaO·SiO_2;其中2CaO·Fe_2O_3等含铁矿物甚少。
One of the hallmarks of oxygen side-blown converters is the particularly strong agitation at the metal-slag interface, which promotes the use of sticky slag operations. Comparison and analysis of different types of terminal oxygen slag furnace slag and found that some of the viscous slag basically do not corrode common tar dolomite lining, in some cases can also be fused in the lining of the lining of the furnace, the control properly, There is a role to protect the lining. Practice has proved that the use of sticky slag operation is conducive to a substantial increase in converter furnace age. The nature of the furnace atmosphere and its effect on the slag during the smelting gap time of oxygen side blowing converter are discussed. From the thermodynamic point of view, it can be proved that some furnace gases have the ability to reduce FeO in the slag. In our case, when the mean final slag Σ (FeO) ≤ 12%, the slag is often formed on the surface of the lining, which is mainly due to the low melting point group such as FeO in the final slag with high melting point Yuan was reduced by the furnace atmosphere, so that the melting temperature of slag further increased from liquid to solid due to change. The mineral composition of these superficial material is mainly 3CaO · SiO_2, 2CaO · SiO_2; among them, there are few iron-bearing minerals such as 2CaO · Fe_2O_3.