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使用含TiO2较高的原料或人为地在保护渣中加入TiO2,可以降低结晶器内渣膜的传热能力,但是该类渣在现场长期使用后会出现连铸粘结和漏钢比例大幅上升的情况,造成这一问题的可能原因是该类保护渣在熔化过程中形成了TiC、Ti(C、N)等高熔点物质,从而引起粘结漏钢。本文通过热力学计算以及实验室研究证实了在含TiO2保护渣使用过程中生成TiC等高熔点物质的可能性。
The use of higher raw materials containing TiO2 or artificially added TiO2 in the mold flux can reduce the heat transfer capacity of the slag film in the mold, but the proportion of continuous casting and steel pouring will increase sharply after long-term use of such slag in the field The possible reason for this problem is that this type of mold flux forms high-melting-point substances such as TiC, Ti (C, N) during the melting process, which leads to stick-out of the steel. In this paper, thermodynamic calculations and laboratory studies have confirmed the possibility of generating high melting point materials such as TiC during the use of TiO2-containing mold fluxes.