
【机】 high phosphorus pig iron; phosphoric pig iron
high; high-priced; lofty; loud; tall
【医】 homo-; hyper-; hypsi-; hypso-; per-
phosphor; phosphorus
【化】 phosphor
【医】 P; phosphor; phosphorus
【化】 ingot iron; mill iron; pig iron
High-phosphorus pig iron (高磷生铁) 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
高磷生铁是生铁的一种特殊类型,其核心特征在于磷元素的含量显著高于普通生铁。以下是其详细解释:
高磷生铁通常指磷含量超过普通生铁标准的铁碳合金。根据行业应用差异,其磷含量范围存在不同界定:
普通生铁主要用于炼钢或铸造,而高磷生铁因含磷量高,更适用于导电性要求高、热膨胀系数低的场景,如电解铝阳极连接。其导电性和收缩特性优于普通生铁,但加工难度更大。
高磷生铁通过磷元素的特殊作用平衡了流动性、导电性与脆性,是电解铝等工业中的关键材料,其冶炼和应用需严格把控磷含量及工艺参数。如需更详细技术指标,可参考电解铝行业标准或冶金工艺文献。
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