Based on iron smelting in blast furnace by the original "Three refinement method" that is fine pretreatment of raw materials, refine smelting and secondary iron melt refine treatment, in 2017, Longfengshan has further self-independently researched and developed âblast furnace refinement + deep purificationâ technology and produced super high purity pig iron for casting production with high consistency and stability which can be accurately adjusted to the customer demand and realize customized production and personalized service. - Very high purity - High Carbon content- High consistency on quality- Low Carbide Promoting Mn, Ti and V- Cleanness- Optimum size then suitable for every furnace size