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硅铁稀土合金的主要成分,除硅、铁和稀土元素外,还含有一定量的钙或镁,少量的锰、钛和铝,微量的磷和钍等杂质。我厂应用这种中间合金处理球墨铸铁,根据生产工艺的要求,主要须测定合金中的硅、稀土氧化物总量、钙、镁和铁。如无必要,不作杂质的分析。上述主要元素中的硅,一般是按硅铁标准分析方法用碱溶重量法或比色法测定,其余元素的测定方法
Ferrosilicon rare earth alloy main components, in addition to silicon, iron and rare earth elements, but also contains a certain amount of calcium or magnesium, a small amount of manganese, titanium and aluminum, trace amounts of phosphorus and thorium and other impurities. I plant this intermediate alloy processing ductile iron, according to the requirements of the production process, the main determination of the alloy of silicon, rare earth oxides, calcium, magnesium and iron. If not necessary, do not make analysis of impurities. The main elements of silicon, silicon iron is generally based on standard analytical methods using alkali-soluble gravimetric method or colorimetric method, the determination of the remaining elements