FeSi70 Lump Size 10-30 to 50-100mm

 

FeSi70 lump size should be selected according to how your plant stores, transfers and adds ferro silicon, rather than choosing one size for every process. We can supply FeSi70 lumps in 10-30mm, 30-50mm and 50-100mm ranges, with order-specific sizes available when required.

Start with the maximum particle size your feeding system can accept, then consider whether a narrower screened range is required and how much undersize or oversize your plant allows. The FeSi70 chemistry should be confirmed separately from the physical lump-size decision.

You can also review our ferro silicon product range if you need to compare FeSi grades before selecting particle size.

 

FeSi70 grade and FeSi70 lump size should be treated as two separate purchase specifications. The chemical grade defines the alloy composition, while 10-30mm, 30-50mm or 50-100mm defines the physical form supplied to your plant.

FeSi70 Element	Reference Specification
Si	≥70%
Al	≤1.5%
Ca	≤1.0%
P	≤0.04%
S	≤0.02%
C	≤0.2%
Fe	Balance

For a page focused specifically on chemistry limits rather than particle size, see our FeSi70 chemical composition specification.

 

The three FeSi70 lump ranges differ mainly in physical handling. There is no single size that is automatically better for every furnace or feeding system.

FeSi70 Lump Size	Physical Character	Main Selection Question
10-30mm	Smaller FeSi70 lump range	Does your feeding system require a relatively small and controlled upper particle size?
30-50mm	Medium FeSi70 lump range	Do you need lump material while keeping both the lower and upper size limits relatively narrow?
50-100mm	Coarse FeSi70 lumps	Can your transfer and addition system handle larger alloy pieces?
Custom Size	Order-specific screened range	Does your plant already use a fixed particle-size specification?

 

FeSi70 10-30mm gives you a smaller lump range without moving into very fine granules or powder. It can be considered when your equipment requires the maximum lump size to remain relatively low or when a narrower physical range makes material transfer easier to control.

FeSi70 10-30mm for Restricted Feed Openings

If the transfer route has a limited opening, selecting a smaller upper particle size can reduce the risk of receiving pieces that are too large for the equipment. Confirm the actual equipment limit before treating 10-30mm as the required specification.

 

FeSi70 30-50mm sits between the smaller 10-30mm range and coarse 50-100mm material. Its narrower 20mm nominal span can be useful when your purchase specification places more emphasis on receiving a relatively consistent lump size.

FeSi70 30-50mm for a Narrower Lump Distribution

If both very small pieces and large coarse lumps are undesirable, 30-50mm provides a middle-size specification to discuss with the supplier. The final choice should still follow your plant's established handling and feeding practice.

 

FeSi70 50-100mm is the coarsest of the three standard lump ranges shown on this product page. It should be selected only when your material-handling route can accept pieces up to 100mm.

FeSi70 50-100mm for Coarse Lump Handling

Check the receiving hopper, transfer route and maximum permitted particle size before ordering coarse FeSi70. If your existing specification already uses a smaller range successfully, changing to 50-100mm should be based on an actual process requirement rather than availability alone.

 

Particle size is not only about the largest lump. The amount of undersize material can also affect how consistently the shipment matches the range you ordered.

FeSi70 Size Issue	What to Consider
Too Many Small Pieces	Confirm the acceptable undersize level when fines affect your handling requirement.
Too Many Large Pieces	Set an oversize limit when material above the nominal range cannot be accepted.
Wide Size Distribution	Choose a narrower screened range if physical consistency is important.
Transport Breakage	Consider that ferro silicon lumps can generate smaller fragments during repeated handling.

For a broader explanation covering other FeSi grades and particle ranges, see our ferrosilicon particle size for steelmaking guide.

 

After FeSi70 is crushed, screening separates the material into the required commercial lump range. The screening requirement should match the particle-size specification agreed for your order.

FeSi70 Lump Size Check After Screening

For 10-30mm, 30-50mm or 50-100mm orders, check whether the prepared shipment matches the nominal range and any additional undersize or oversize limits stated in the purchase requirement.

FeSi70 Lump Size Check Before Packing

If size consistency is important, excessive fines or obviously oversized pieces should be identified before packing. When a numerical tolerance is required, visual checking should be supported by the agreed particle-size inspection method.

 

Our current FeSi70 supply specification uses 1000kg bags, with order-specific packing available when required. For lump products, packing should also be considered from the perspective of particle breakage during handling and transport.

If the percentage of fines is important to your receiving standard, include that requirement together with the packing and particle-size specification before shipment.

 

 

 

 

A useful FeSi70 inquiry should state the chemical grade and physical size separately. If your plant has already defined acceptable fines or oversize, include those limits instead of asking only for "FeSi70 lumps."

If you already have an internal particle-size specification, send it together with your chemistry requirement. We can use the same size range as the basis for order confirmation instead of replacing it with another standard commercial range.

Send FeSi70 Lump Size Requirement

 

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