Ferrosilicon 75% 72% Granules for Foundry Inoculation Cast Iron Production and Metallurgical Use

In the foundry, ferrosilicon earns its keep after the melt is ready — at inoculation. ZHENAN supplies FeSi 75 and FeSi 72 as screened granules in the tight size windows inoculation actually needs: 0–3 mm for late and stream inoculation, 3–10 mm for ladle treatment, with finer foundry splits such as 0.3–1 / 1–3 / 3–8 mm sieved to order. Granule size controls when the inoculant dissolves and how long the inoculation effect survives until pouring, so we treat size as a specification, not an afterthought: every lot is screened, oversize and fines are controlled, and the two grades are analysed and packed separately. Whether you run gray iron brake castings or ductile iron pipe, you can match grade and granulometry to your base iron, your treatment method and your pouring interval — and buy both grades in one order.

• Standard granule sizes: 0–3 mm and 3–10 mm; foundry splits 0.3–1 / 1–3 / 3–8 mm available on request.
• Screening control: oversize and fines limited by sieve check before packing; size report supplied per lot.
• Optional: low-aluminium FeSi 75 (Al ≤0.5%) for foundries that must restrict aluminium pickup in ductile iron.
• Chemical composition and granulometry can be optimized to customer requirements; every lot ships with a certificate of analysis.

• Inoculation of gray cast iron: promotes graphitization, prevents carbide (chill) formation and stabilizes machinability.
• Inoculation support for ductile iron: used alongside spheroidizing treatment to promote graphite nodule formation and count.
• Ladle, stream, in-mold and late inoculation: granulometry selected to suit each treatment point and pouring interval.
• Deoxidation in induction furnaces: fine granules dissolve quickly for melt conditioning before treatment.
• General metallurgical use: silicon adjustment of iron melts where a fast-dissolving, accurately metered addition is required.