FeSi72 50-100mm for Steelmaking

FeSi72 50-100mm is a ferro silicon lump grade for steelmaking processes that use larger material for furnace or ladle addition. With Si ≥72%, it can provide both deoxidation support and silicon adjustment, while the 50-100 mm specification gives this page a separate purchasing task from general FeSi72 products.

Before ordering, you should confirm whether your charging system actually accepts 50-100 mm lumps, how much undersize or oversize material is acceptable, and which batch chemistry will be used for the silicon-addition calculation. If your plant uses a fixed feeding practice, send the furnace type, target silicon adjustment and particle-size limits together.

For other grades and physical sizes, you can first review our ferro silicon grades and sizes .

The FeSi72 grade should be confirmed from both the silicon minimum and the impurity limits agreed for the order. For steelmaking use, the actual batch result is important because silicon content directly affects the quantity needed for composition adjustment.

If your main task is to review the grade limits and batch documentation rather than the 50-100 mm charging condition, see our FeSi72 specification and batch COA page.

The 50-100 mm range is not simply a packing description. It determines how the material behaves during conveying, charging and contact with the molten metal. A size that works well in one furnace may be too large for another feeding system.

FeSi72 50-100mm for Bulk Furnace Charging

Larger FeSi72 lumps are more relevant when your furnace or ladle practice accepts bulk alloy addition and provides enough time and contact for the material to dissolve into the melt.

Before changing from a smaller FeSi size to 50-100 mm, check the feed opening, material-conveying system, addition position and available assimilation time used by your plant.

FeSi72 Fines and Oversize Control for 50-100mm Supply

A nominal 50-100 mm specification does not explain how much material below 50 mm or above 100 mm is acceptable. If particle distribution affects your process, include fines and oversize limits directly in the purchase specification.

For a broader comparison of lump ranges and fines control, see our ferrosilicon particle size for steelmaking guide.

FeSi72 addition should be calculated from the silicon correction required by the heat rather than from a fixed kilograms-per-ton value. The required amount changes with the starting silicon level, target silicon level, steel mass, actual FeSi72 silicon content and the silicon recovery achieved by your own process.

Use your plant's historical silicon recovery rather than assuming one universal recovery percentage. Furnace practice, slag condition, addition position, timing and particle size can all affect the actual recovery seen in production.

Why FeSi72 Batch COA Matters for Silicon Addition

If the addition calculation is based on exactly 72% Si while the actual batch result is different, the calculated alloy quantity will not represent the actual silicon input precisely. For tighter composition control, use the applicable batch Si result together with your plant recovery data.

FeSi72 Impurity Limits Before Steel Alloy Adjustment

Silicon is not the only value to check. If your steel grade controls Al, Ca, P, S or C closely, include those limits in the purchase specification before selecting the FeSi72 batch for alloy adjustment.

The same FeSi72 chemistry can behave differently when the physical addition method changes. Your furnace type, addition location and available dissolution time should therefore be considered together with the 50-100 mm lump specification.

FeSi72 50-100mm for EAF Steelmaking

For electric arc furnace use, confirm whether the 50-100 mm material matches the charging route used by your plant. If FeSi72 is added as part of bulk furnace charging, the size should be compatible with the charging equipment and your normal alloy-addition practice.

FeSi72 50-100mm for Ladle Alloy Adjustment

For ladle addition, available dissolution time and the method used to introduce the alloy become more important. If your ladle practice requires faster assimilation or more controlled feeding, confirm whether 50-100 mm is appropriate before placing the order.

When FeSi72 50-100mm May Be Too Large for Your Feeding System

Do not select 50-100 mm only because larger lumps are available. If the plant uses narrow feed chutes, automated dosing or short assimilation times, another particle-size specification may be more suitable.

Send FeSi72 Size & Furnace Requirement

FeSi72 50-100mm Ferro Silicon Supply

FeSi72 Ferro Silicon Supply Discussion

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