新型Al基复合脱氧剂脱氧效果研究

Al作为炼钢脱氧剂单独脱氧时易烧损，导致利用率较低；同时，其脱氧产物Al2 O3熔点高，形状不规则，不易在脱氧过程中上浮排出，造成水口堵塞，恶化钢材质量。为了提高铝的脱氧效率，同时使脱氧产物Al2 O3能快速从钢液中上浮排出，本文研究了一种以金属铝为有效脱氧组分，低熔点氧化物渣系为载体的新型复合脱氧剂。实验表明，使用该脱氧剂不仅可以保证钢液中溶解氧的质量分数在10×10-6以下，而且脱氧后钢中Al2 O3夹杂物与纯Al脱氧相比尺寸更小、数量更少，较显著地提高了钢材的纯净度，具有良好的脱氧效果。

Deoxidization effect research of a new Al based complex deoxidizer

As a deoxidizer for steelmaking, Al has a problem of oxidation loss when it is added into liquid steel, which leads to a lower utilization rate of Al. At the same time, the high melting point and irregular shape of the deoxidization products make it difficult to remove Al2 O3 inclusions from molten steel effectively, which causes nuzzle clogging and steel quality deteriorative. A new kind of complex deoxidizer which takes Al as the effective deoxidization component and a low melting point slag including Al2 O3-SiO2-MgO-CaO as the carrier was investigated to improve the deoxidization utilization rate of Al and make the deoxidization products eliminate quickly from molten steel. Experiment results showed that the complex deoxidizer not only guaranteed the dissolved oxygen content in molten steel below 10 × 10 -6 , but also made the deoxidization inclusions fewer and smaller. Compared with Al deoxidization, the puri-ty of steel was significantly improved and an excellent deoxidization effect was presented.