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本文介绍了在30kg中频炉和硅钼棒炉上模拟双联熔炼的温度条件,以含磷0.33～0.5％的铁水为对象,首次采用氧化——还原复合法进行脱磷处理的实验研究情况。经50余炉试验结果初步表明:脱磷率达50～80％,石墨形态为细小球状或蠕虫状加少量片状,机械强度由原铁水的173N/mm~提高到295N/mm~2以上。作者认为双联熔炼的铁水用复合法脱磷工艺可行,可望用来生产低碳球铁。
In this paper, the temperature conditions of the twin-tube smelting simulated on a 30kg IF furnace and a silicon-molybdenum bar furnace were introduced. The experimental research on the dephosphorization was carried out for the first time using the molten iron containing 0.33-0.5% phosphorus. The test results of more than 50 furnaces showed that the dephosphorization rate was 50-80%, the morphology of graphite was small globular or wormlike, and the mechanical strength increased from 173N / mm ~ of the original hot metal to 295N / mm ~ 2. The authors believe that the double melting of molten iron with composite dephosphorization process feasible, is expected to be used to produce low-carbon ductile iron.