the role of ferrophosphorus for steelmaking

　Ferrophosphorus for steelmaking mainly increases the content of phosphorus in molten steel, and the resulting steel has good cutting performance. The method of obtaining ferrophosphorus is mainly obtained from the phosphorus-making electric furnace, in which the phosphorus content is 20~26%. As an alloying agent in the steel-making industry, it can also produce phosphates. The ferrophosphorus produced in China has two varieties, FeP1 and FeP2, containing 15-20% phosphorus, the atomic number of phosphorus is 15, atomic weight is 30.97, and the outer electronic structure is 3S3P , Density 1.83g/cm3 (white phosphorus) and 2.2g/cm3 (red phosphorus), melting point 44 ℃, boiling point 257 ℃, the presence of Fe3P, Fe2P, FeP, FeP2 and other phosphides, phosphorus containing 18% to 25% ferrophosphorus The melting temperature range is 1100～1250℃, and the density is 5.8～6.5g/cm3.

Many steel-making experts call ferrophosphorus an "indispensable" ferroalloy product in steelmaking. He can enhance the fluidity of molten iron. When using it, the phosphorus content index should be strictly controlled to ensure that the ferrophosphorus is wear-resistant and fragile, and overall wear resistance is improved. Phosphorus with a degree of about 0.15%, which can significantly improve the wear resistance of cast iron, improve the tensile strength of steel, improve the performance and surface quality of castings, improve the thermal conductivity and heat resistance, and effectively improve the distribution of phosphorus eutectic in the network The thermal conductivity and heat resistance make the wear surface uniform, and it is not easy to produce sparks during friction. It can be seen that ferrophosphorus for steelmaking really has a great effect, and it is no wonder that experts all call it an indispensable smelting material for steelmaking.