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Journal of Kunming Metallurgy College ›› 2024, Vol. 40 ›› Issue (6): 12-.DOI: doi:10.3969/j.issn.1009-0479.2024.06.002

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ResearchontheDeterminationofSiliconContentinFerrosiliconand#br# ManganeseSiliconAlloysbySodium HydroxideMelted#br# PerchlorateDehydrationGravimetricMethod#br#

  

  1. (QualityInspectionCenterofKunmingIronandSteelCo.,Ltd.,Kunming650300,China)
  • Online:2024-07-04 Published:2025-07-07

Abstract: Abstract:Inordertoaccuratelydeterminethesiliconcontentinferrosiliconandmanganesesiliconal
loys,thenationalstandardrecommendedmethodofperchloricaciddehydrationweightmethodwassuc
cessivelyusedfortesting.Duetothehighrequirementsforsodiumperoxidesolidfluxusedinthenation
alstandardmethod,itisdifficulttomasterduringthesamplemeltingprocessofthetestmethod.The
fluxiseasytosplashandoverflowduringthetest,andthesampleisalsolostwiththeoverflowofthe
flux,resultinginlowandunstablemeasurementresults.Themethodusesgranularsodiumhydroxideto
meltinsteadofsodiumperoxideastheflux,meltsinahightemperaturemufflefurnaceat650℃ for15
minutes,andreferstotheperchloricaciddehydrationstepandwashes.Thetemperaturewasslowlyand
slowlyincreasedfrom400℃ to650℃ inamufflefurnace.Thefilterpaperandsamplewereashened,
ignited,andconstantweight.ICPmethodwasusedtodeterminethepercentageofresidualsiliconinthe
filtratetoverifythelotioneffectandstability.Therelativestandarddeviationofthemethodtestresultsis
between015% and122%,thedeviationofthetestresultsislessthan035% specifiedinthenation
alstandard,andtheaccuracymeetstheallowabledeviationofthecurrentnationalstandardmethod.

Key words: Keywords:ferrosilicon, manganesesilicon, weightmethod, sodium hydroxidemelting, perchloric
aciddehydration

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