98% silicon metal powder is the most widely used industrial-grade silicon powder on the market. It's cheaper than high-purity powder (99% or higher) and cleaner than 97% secondary powder, making it a primary raw material for many refractory material plants, steel mills, and chemical plants.

Simply put, if you are producing:

Refractory materials (blast furnace clay, trough mix, castables)

Steelmaking deoxidizers

Chemical intermediates (silanes, silica)

then 98% is the most suitable choice-sufficient, affordable, and reliable.

silicon metal Powder 3 silicon metal powder 95

chemical composition

Grade	Silicon content	Iron	Aluminum	Calcium	Who is it suitable for?
Refractory Grade	≥98.5%	≤0.5%	≤0.5%	≤0.3%	Refractory materials, steelmaking deoxidation. Less stringent impurity requirements, highest cost-effectiveness.
Chemical Grade	≥99.0%	≤0.4%	≤0.4%	≤0.1%	Organosilicon intermediates, silanes. Lower impurities, better reactivity.
Sub-grade	≥97.0%	≤3.0%	-	-	Cost-sensitive applications. Inexpensive, but with high impurities.

The term 98% usually refers to a general term between refractory grade (98.5%) and chemical grade (99.0%).

How to choose the size? Match it to your specific process:

Size	Suitable for	Why?
20-50目(coarse particles)	Steelmaking deoxidizer	It melts quickly in a ladle and doesn't smoke or get sucked away like fine powder.
50-100目(medium particles)	Refractory aggregate	This size is ideal for making clay and trough filler.
100-200目(fine powder)	Refractory binder, spraying material	Fine powder fills the gaps between coarse particles, resulting in a denser product after firing.
200-325目(ultrafine powder)	Organosilicon intermediates, silanes	The finer the powder, the faster the reaction. For fluidized bed manufacturers, 325 mesh is the mainstream.
500 mesh and above	Special chemical applications	For applications requiring extremely high specific surface area, custom-made products are necessary.

In short: coarse ones are cheaper and don't smoke; fine ones react quickly but are more expensive. You can choose according to your process requirements.

silicon metal powder use

1. Refractory Material Plants (Largest Customer)

For plants producing blast furnace taphole clay, trough lining, and castables, silicon metal powder is a crucial raw material. It forms mullite at high temperatures, improving the slag resistance and high-temperature strength of refractory materials.

Recommended Size: 100-200 mesh fine powder

Recommended Grade: Refractory grade (98.5%)

2. Steel Plants (Deoxidizer)

Some steel plants use silicon metal powder instead of ferrosilicon blocks for deoxidation. The advantage of using powder is faster reaction and less burn-off. However, it's important to note that excessively fine powder can easily cause smoke; coarse particles of 20-50 mesh are best.

Recommended Size: 20-50 mesh

Recommended Grade: Refractory grade (98.5%) or secondary grade (97%)

3. Chemical Plants (Organosilicon Intermediates, Silanes)

Silicon powder reacts with chloromethane in a fluidized bed to produce organosilicon monomers. This application requires high purity and size.

Recommended size: 200-325 mesh

Recommended grade: Chemical grade (99.0%), low aluminum and calcium content

4. Production of silica and silica sol

After dissolving and precipitating silicon metal powder, it can be made into silica (rubber reinforcing agent) or silica sol (coating additive).

Recommended size: 200 mesh and above

Recommended grade: Chemical grade (99.0%)

silicon metal bl

FAQ

Q: What's the price difference between 98% and 99% silicon powder? Which should I buy?

A: 99% is more expensive than 98%, it depends on the market. For refractory materials and steel deoxidation, 98% is sufficient. For organosilicon and silane production, 99% is recommended as it has lower impurities and better reactivity.

Q: What is the 325-mesh sieve pass rate for your powder?

A: We guarantee a 325-mesh sieve pass rate ≥90%. A size test report is included with the shipment, and you can also re-test it yourself.

Q: What's the difference between metallic silicon powder and ferrosilicon powder?

A: Metallic silicon powder is pure silicon (Si≥97%), while ferrosilicon powder is a fesi alloy (Si 65%-75%, Fe 20%-30%).silicon metal powder has higher purity and is suitable for chemical and refractory materials; ferrosilicon powder is cheaper and suitable for steel deoxidation. Don't buy the wrong kind.

Q: Will the powder clump together if stored for a long time?

A: Silica powder is chemically stable and generally does not clump. However, if it gets damp, ultrafine powder (below 325 mesh) may clump slightly; it can be used after drying and sieving. Our ton bags have an inner lining for moisture protection.

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