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硅铁中硅量的测定,有重量法及硅氟酸钾容量法,重量法准确度高,但操作繁琐,时间较长.硅氟酸钾容量法时间稍快,但精确度不高,以上方法,均需用贵重仪器及有害试剂,不太适宜于小型化验室作为快速测定之用.根据硅与铁的相对密度(硅的相对密度为2.40,铁的相对密度为7.80)之差,多年来,在分析领域中,曾有用相对密度之差测硅的方法,但都需要特制的仪器,由于这一限制,使这一方法难于推广.本法不需特殊仪器,不用任何药品,只需称几次天秤,在3min内即可得到结果,与化学分析的结果之差,均保持在1%以内,用这种方法,作进厂硅铁的初验,是切实可行的(特别是小型炼钢厂).1 试验方法先将比重瓶(25～50ml)装满蒸馏水后称重,令其质量为m_1,倒去水的1/3,备用.
Ferrosilicon in the determination of silicon, a weight method and potassium silicofluoride capacity method, gravimetric method with high accuracy, but the operation cumbersome, a long time. Potassium silicofluoride capacity method slightly faster time, but the accuracy is not high, the above Method, are required expensive instruments and harmful reagents, not suitable for small laboratories for rapid determination purposes.According to the relative density of silicon and iron (relative density of silicon is 2.40, the relative density of iron is 7.80) difference, for many years In the field of analysis, there was a method of measuring silicon using the difference in relative density, but all require special equipment, which is difficult to popularize because of this limitation. This Law does not require any special instruments and does not require any medicines. Weighing scales several times, within 3min to get the result, and the results of chemical analysis, the difference between the remaining within 1%, with this method, the initial test into the factory ferrosilicon, is feasible (especially small Steelworks) .1 Test Method Weigh the pycnometer (25 ~ 50ml) into distilled water and make it mass m_1, pour 1/3 of the water back.