Metallurgical equipment - Sponge iron production line

    Recently, the sponge iron production line produced by our company has been installed and put into production at the customer's site. This sponge iron production line is customized according to the needs of foreign customers.

    Sponge iron is a porous form of elemental iron produced by direct reduction of iron ores (such as hematite and magnetite) at temperatures below their melting points. It is named for its loose and porous internal structure, resembling a sponge.

Main applications of sponge iron:

  1. Metallurgical industry: The primary raw material for electric arc furnace (EAF) steelmaking. This represents the largest and most significant application of sponge iron. Due to its high iron content (typically exceeding 90%) and low impurity content (especially low levels of harmful elements such as phosphorus and sulfur), sponge iron serves as an ideal raw material for EAF steelmaking, capable of partially or fully replacing scrap steel. Especially when scrap steel resources are scarce or prices are high, the use of sponge iron can effectively enhance the quality of molten steel, producing high-quality special steel and alloy steel.

  2. Water treatment field: ambient temperature filtration-type chemical deoxidizer. In industrial water treatment, activated sponge iron of specific specifications is used as an efficient deoxidizer, which is widely applied in:

   a. Feedwater deoxygenation for hot water boilers and low-pressure steam boilers: Prevents oxygen corrosion in the boiler system and extends equipment life.

   b. Industrial circulating cooling water system: reduce corrosion of pipelines and heat exchangers.

   c. Oilfield water injection: Prevents corrosion and scaling of the water injection system and the formation. Its working principle is to utilize the huge specific surface area of sponge iron to undergo an oxidation reaction with dissolved oxygen in water (2Fe + 2H₂O + O₂ → 2Fe(OH)₂), which stabilizes the dissolved oxygen content to below 0.05 mg/L, meeting the national boiler water quality standards. This process is carried out at room temperature, without heating, resulting in low operating costs.