
【機】 high phosphorus pig iron; phosphoric pig iron
high; high-priced; lofty; loud; tall
【醫】 homo-; hyper-; hypsi-; hypso-; per-
phosphor; phosphorus
【化】 phosphor
【醫】 P; phosphor; phosphorus
【化】 ingot iron; mill iron; pig iron
High-phosphorus pig iron (高磷生鐵) is a specialized type of crude iron alloy characterized by a phosphorus content exceeding 0.3%, with typical industrial compositions ranging between 0.3% and 2.5% . This material is primarily produced in blast furnaces through smelting iron ores with high phosphorus impurities, historically utilized in applications requiring specific casting properties before modern steelmaking techniques prioritized low-phosphorus raw materials for improved mechanical strength .
Its chemical composition generally includes 92-94% iron, 3-4.5% carbon, 0.3-2.5% phosphorus, and trace amounts of silicon, sulfur, and manganese . The elevated phosphorus content reduces melting points (approximately 1,150°C) but introduces cold brittleness, limiting its structural applications . Contemporary usage focuses on niche metallurgical processes and historical reproduction projects, guided by standards like China's GB/T 717-2018 for pig iron classification . Environmental regulations, such as ISO 14001 frameworks, now mandate specialized slag treatment systems to manage phosphorus byproducts during production .
References
高磷生鐵是生鐵的一種特殊類型,其核心特征在于磷元素的含量顯著高于普通生鐵。以下是其詳細解釋:
高磷生鐵通常指磷含量超過普通生鐵标準的鐵碳合金。根據行業應用差異,其磷含量範圍存在不同界定:
普通生鐵主要用于煉鋼或鑄造,而高磷生鐵因含磷量高,更適用于導電性要求高、熱膨脹系數低的場景,如電解鋁陽極連接。其導電性和收縮特性優于普通生鐵,但加工難度更大。
高磷生鐵通過磷元素的特殊作用平衡了流動性、導電性與脆性,是電解鋁等工業中的關鍵材料,其冶煉和應用需嚴格把控磷含量及工藝參數。如需更詳細技術指标,可參考電解鋁行業标準或冶金工藝文獻。
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