The silicon content determines primary applications: FeSi45's lower silicon range suits cost-sensitive processes, while FeSi75's higher purity meets stringent metallurgical requirements.
Density varies from 3.3 g/cm³ (FeSi45) to 2.8 g/cm³ (FeSi75) due to silicon's lower atomic mass.
Particle size distributions also differ – FeSi45 is commonly supplied in 10-50mm lumps for controlled dissolution, whereas FeSi75 is often processed into 3-10mm granules for rapid reaction in steelmaking.
Applications
Ferro silicon 45 primarily serves as an inoculant in gray iron foundries, promoting Type A graphite formation and reducing chilling tendencies. It is also used in ferromanganese production as a reductant.
Ferro silicon 75 acts as a deoxidizer in electric arc furnace steelmaking, removing dissolved oxygen while simultaneously alloying steel. Its low aluminum content (<1.5%) prevents nozzle clogging in continuous casting. In magnesium production via the Pidgeon process, FeSi75 facilitates magnesium oxide reduction at 1,200°C, whereas FeSi45 lacks sufficient silicon for this reaction.
Technical Performance Metrics
The deoxidation efficiency of ferro silicon 75 exceeds FeSi45 by 40-60% per metric ton in steelmaking, reducing consumption costs. FeSi75 generates 7,250 kcal/kg during exothermic reactions versus 5,100 kcal/kg for FeSi45.
Electrical resistivity differs significantly: FeSi75 measures 80-100 μΩ·cm for electrode pastes, while FeSi45 ranges at 45-60 μΩ·cm.
In storage, FeSi75 requires stricter moisture control (<0.1% humidity) due to higher silicon hydrolysis risks.
ZhenAn's Advantages
We produce both FeSi45 and FeSi75 grades at our ISO-certified facility.
Four-stage quality control includes XRF spectrometry of raw materials, molten bath analysis, particle screening, and pre-shipment verification.
Our 150,000MT annual inventory enables immediate shipment of standard and custom sizes (0-100mm).
Packaging utilizes 25kg waterproof bags within 1MT jumbo bags, with steel drum options available.
Dedicated project managers provide real-time shipment tracking through all logistics phases.
Procurement Support
Technical documentation (SGS/BV test reports, MSDS, COA) accompanies all shipments.
Third-party laboratory samples are available upon request. Our 24-hour response protocol addresses quality verification or documentation requirements.
Custom orders accommodate specific chemical compositions, including low-titanium (≤0.05%) or low-carbon (≤0.1%) variants for specialty alloys.
