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首页> 外文期刊>ISIJ international >Direct Alloying of Silicon in Liquid Steel by Molten Slag Electrolysis
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Direct Alloying of Silicon in Liquid Steel by Molten Slag Electrolysis

机译：熔渣电解在钢液中硅直接合金化

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The present study aimed at completing the direct alloying operations of Si in liquid steel by the way of electrochemical method. In the traditional steelmaking process, the ferrosilicon is prepared by preliminary smelting the oxide ores, and then added into the liquid steel for alloying. In this study, the direct alloying operations will be completed by electrolyzing CaO–SiO_(2)–Al_(2)O_(3) molten slags, in which process the alloy elements are produced in the slag-steel interface and then diffuse into the liquid steel when direct current pass through the two electrodes which are placed in liquid steel (cathode) and slag (anode), respectively. It is a new attempt to applying the electrochemistry on the steelmaking process. Experimental results showed that after electrolysis for 2 hours, as applying larger current and using slag with a higher content of SiO_(2), there will be a higher content of Si generated in the liquid steel. It was found that during the electrolysis process, Al content in the steel also slightly increases, while there was no obvious change of Ca content. Meanwhile, reduction of Al_(2)O_(3) and CaO is not the main factor to decrease current efficiency (calculated by the ratio of generated Si in liquid steel to the theoretical silicon by Faraday law).
机译：本研究旨在通过电化学方法完成液态钢中硅的直接合金化操作。在传统的炼钢工艺中，硅铁的制备方法是先将氧化物矿石初步冶炼，然后将其加入液态钢中进行合金化。在这项研究中，直接合金化操作将通过电解CaO–SiO_（2）–Al_（2）O_（3）熔融炉渣来完成，在此过程中，合金元素在炉渣-钢界面中产生，然后扩散到炉渣中当直流电通过两个分别置于液态钢（阴极）和炉渣（阳极）中的电极时，液态钢。这是将电化学应用于炼钢过程的新尝试。实验结果表明，电解2小时后，施加更大的电流并使用SiO_（2）含量较高的炉渣，钢液中产生的Si含量会更高。发现在电解过程中，钢中的铝含量也略有增加，而钙含量没有明显变化。同时，Al_（2）O_（3）和CaO的减少不是降低电流效率的主要因素（根据法拉第定律，根据液态钢中生成的Si与理论硅的比例计算）。

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