论文部分内容阅读
在机械工厂自制的稀土硅铁镁合金中,当试样以硝酸、氢氟酸溶解后存有黑色不溶物,据分析系合金在溶炼时加入铸铁屑带入的。经光谱分析,黑色不溶物中残留较多量的是硅。为了回收硅,用碱熔融后再用光度法测定黑色不溶物中的硅,与氟硅酸钾容量法中硅的结果合并,提高了方法的准确度。 一、黑色不溶物的存在 为了测定不溶物中硅的准确含量,用熔融二次蒸干重量法测定6~#稀土硅铁镁合金试样(无锡柴油机厂制作)中硅的含量,其结果(％)如下:
In the mechanical factory made rare earth ferrosilicon magnesium alloy, when the sample with nitric acid, hydrofluoric acid dissolved after the existence of black insoluble, according to the Department of analysis of alloy added in the cast iron castings into. After spectroscopic analysis, a larger amount of silicon remained in the black insolubles. In order to recover the silicon, the silicon in the black insolubles is measured photometrically after melting with an alkali, and the results of the silicon in the potassium fluosilicate capacity method are combined to improve the accuracy of the method. First, the presence of black insoluble matter In order to determine the exact content of insoluble silicon, with molten secondary dry weight method for the determination of 6 ~ # rare earth ferrosilicon magnesium alloy samples (Wuxi Diesel Engine Factory production) in the silicon content, the results ( %)as follows: