关键词: 稀土硅铁合金, 分光光度法, 熔融, 分析

Abstract: A melting method of titanium content determination in rare earth ferrosilicon alloy using spectrophotometry with diantipyrylmethane，which mixed anhydrous sodium carbonate and boric acid to flux melting sample quickly at a high temperature was studied. The optimum condition of melting sample was investigated. The sample could be melted completely，with stable result and error in an allowable range，meeting the requirement of analysis. The method can quickly decompose ore sample to obtain accurate result，with advantages of environmental protection，quick，and adaptable to the batch analysis as compared with dissolving sample by using nitric acid and hydrofluoric acid. The optimum condition of melting rare earth ferrosilicon alloy was ratio of sample and mixed alkali 6∶1，ratio of sodium carbonate and boric acid 2∶1，and melting at 1000 ℃ for 20 min. The decreasing order of importance was ratio of sample and mixed alkali，melt time，melt temperature，and ratio of sodium carbonate and boric acid.

Key words: rare earth ferrosilicon alloy, spectrophotometry, melting, analysis