Dephosphorisation basic oxygen furnaces (deP-BOFs) greatly differ from conventional BOFs in the melting process, especially its many limits on adding scrap. A mathematical model of the steel scrap melting process was established in MATLAB to investigate the mechanism of scrap melting in deP-BOF in terms of coupling effects of the carbon content of the molten steel, temperature, scrap preheating and converter blowing time on the melting rate and size of the steel scraps. The scrap melting rate was influenced by both the heat and mass transfer during the melting process: at 1350 °C, when the carbon content was increased from 4.5 to 5.0 mass%, the scrap melting rate increased by 43%; for the carbon content of 4.5 mass%, when the temperature was increased from 1350 to 1400 °C, the scrap melting rate increased by 60%. The carbonisation was found to be the restrictive step of the scrap melting process in deP-BOFs with respect to conventional ones. The scrap heating from room temperature to 800 °C reduced the crusting thickness on the scrap surface but there was no obvious influence on the melting rate. The scrap melting size in the deP-BOF was rather limited by its low melting rate and short melting time.

脱磷碱性氧气炉（deP-BOF）在熔化过程中与传统的BOF有很大不同，尤其是在添加废料方面有很多限制。在MATLAB中建立了废钢熔化过程的数学模型，以研究deP-BOF中废钢熔化的机理，包括钢水碳含量，温度，废料预热和转炉吹炼时间对熔化速率的耦合效应。和废钢的大小。废料的熔化率受熔化过程中的传热和传质的影响：在1350°C下，当碳含量从4.5质量％增加到5.0质量％时，废料的熔化率提高了43％；当碳含量为4.5质量％时，当温度从1350升高到1400℃时，废料熔化率提高了60％。相对于传统的碳化，发现碳化是deP-BOF中废料熔化过程的限制性步骤。废钢从室温加热到800°C减少了废钢表面的结皮厚度，但对熔化速率没有明显影响。deP-BOF中的废料熔化尺寸受到其低熔化速率和短熔化时间的限制。