Steel Research · 1994 · 95 citations · 3 references
EngineeringMaterials EngineeringMaterials ScienceAir PollutionIndustrial ChemistryMetallurgyCastingIndustrial PollutionPowder MetallurgyVolatile Compound ProfilingVolatile Organic CompoundsVolatile Substance AnalysisContinuous CastingManufacturingMass Spectral Data AnalysisMass Spectral IdentificationMaterial CastingMoisture ContentMoisture Content DependenceVolatile Solids Analysis
A Knudsen effusion technique with mass-spectral analysis of evaporated products has been applied for determination of nature and amounts of substances that evolve from mould powders (MP) into the environment in the process of continuous casting of steel. The experiments revealed that the main volatile fluorides that contaminate air in the working zone of a continuous caster are NaF, KF, SiF4, AlF3, NaAlF4, CaF2. A high proportion of these volatile fluorides as well as components of MP such as CaF2 and Na3AlF6 with water produces HF. Concentrations of different fluorine compounds in the working grounds of a caster depend on chemical and ingredient compositions of MP, basicity and moisture content, technology of MP manufacturing, humidity of atmosphere.
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