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碳酸钙粉热分解产生的CO2对高碳锰铁粉固相脱碳具有很好的脱碳作用,但脱碳过程中物料电磁性能的变化对微波加热的影响很大。将高碳锰铁粉与碳酸钙粉按质量比1∶1均匀混合,在微波场中加热进行固相脱碳反应,脱碳温度分别为900、1 000、1 100、1 200℃,且各保温脱碳60min。用矢量网络分析法测试试样的电磁性能。结果表明,高碳锰铁粉脱碳前后的电磁性能变化很大。脱碳物料的εr′在7.00～10.00范围内,εr″≈0.05。脱碳物料的μr′≈1.00,μr″≈0.00。温度为900和1 200℃时,脱碳物料的电磁性能相近。高碳锰铁粉加热到1 000和1 100℃时,脱碳物料的tanδε和tanδμ最大,微波加热效果良好。
The CO2 produced by the thermal decomposition of calcium carbonate powder has a good decarburization effect on the solid-phase decarbonization of high-carbon ferromanganese powder, but the change of the electromagnetic properties of the material during decarburization has a great influence on the microwave heating. The high-carbon ferromanganese powder and calcium carbonate powder are uniformly mixed at a mass ratio of 1: 1, and are subjected to a solid-phase decarburization reaction by heating in a microwave field with decarburization temperatures of 900, 1000, 100 and 200 degrees centigrade, respectively, Insulation decarburization 60min. Testing the electromagnetic properties of samples by vector network analysis. The results show that the electromagnetic properties of high carbon ferromanganese powder before and after decarburization vary greatly. Εr ’of the decarburized material is in the range of 7.00-10.00, εr “≈0.05 μr’≈1.00, μr” ≈0.00 of the decarburized material. When the temperature is 900 and 1200 ℃, the electromagnetic properties of the decarburized material are similar. High carbon ferromanganese powder heated to 1000 and 1100 ℃, the decarburization material tanδε and tanδμ maximum, microwave heating effect is good.