Ferro Silicon Powder High Grade

📌 Product Showcase: Ferrosilicon Powder (FeSi Powder)

 

 

Ferrosilicon Powder (FeSi Powder) is a finely processed alloy material made from ferrosilicon blocks, widely used in steelmaking, casting, and welding industries. It provides excellent deoxidation, alloying, and density-modifying performance, making it a key additive for producing high-quality steel and iron products.

 

 

We offer customized ferrosilicon powder in various grades, including:

FeSi 75%

FeSi 72%

FeSi 70%

Low-Aluminum FeSi Powder

Customized specifications upon request

Impurities such as Al, C, P, S can be tailored according to customer requirements.

 

 

Ferrosilicon powder can be produced in a wide range of particle sizes:

0–1 mm

0–3 mm

0–5 mm

D50 micron-sized powder

Customized mesh sizes

All powder is sieved precisely to ensure stable particle distribution and excellent absorbability.

 

 

✔ Strong Deoxidizing Capability – Ensures lower oxygen levels and improves steel purity.
✔ Stable Alloying Effect – Enhances silicon content in molten steel effectively.
✔ Good Fluidity and Uniformity – Ensures consistent melting and absorption.
✔ Improved Density & Slag Control – Widely used in heavy media separation.
✔ High Purity & Low Impurity Options – Suitable for high-end applications.

 

 

Ferrosilicon powder is widely used in:

Steelmaking & Secondary Refining (LF/VD/VD)

Foundry industry for cast iron and ductile iron

Heavy media separation in mining

Welding electrode and flux production

Powder metallurgy

 

 

 

We supply various packaging solutions for safe transportation and storage:

1 MT big bag

25 kg woven bag

Customized packaging available

Moisture-proof packaging ensures stable quality during shipping.

 

 

More than 10 years of ferroalloy export experience

Stable and competitive prices

Strict quality control from raw materials to final sieving

Fast delivery from major Chinese ports

Professional team providing full technical support

 

 

 

Client Profile: A large-scale iron ore processing plant in Liaoning Province, China, processing 8 million tons per year of low-grade magnetite ore. The plant used a dense medium cyclone (DMC) system to pre-concentrate ore before grinding.

 

The Challenge: The existing medium-grade ferro silicon powder (75–80% Si, 200 mesh, 85% passing) caused three persistent problems:

 

Medium instability: Density of the ferrosilicon suspension fluctuated between 2.65 and 2.85 g/cm³, leading to inconsistent separation.

 

High viscosity: Fine slimes accumulated rapidly, requiring frequent medium draining and recharging – downtime of 14 hours per week.

 

Oxidation losses: Up to 18% of ferro silicon oxidized every month, especially in summer, increasing consumption to 2.5 kg per ton of feed.

Separation efficiency averaged only 91%, with 5–7% of saleable iron lost to tailings.

 

The Solution – Switching to High-Grade Ferro Silicon Powder: A premium supplier offered High Grade Ferro Silicon Powder with specifications:

Si content: 82–85% (vs. 75–80% standard)

Particle size: 90% passing 325 mesh (45 microns)

Magnetic susceptibility: > 78 emu/g

Surface treatment: Oxide-inhibiting coating

 

Implementation: A 3-month trial compared standard powder (Months 1–2 baseline) against high-grade powder (Month 3 trial). Operating parameters (DMC pressure, feed rate, medium-to-ore ratio) were kept constant.

 

Results:

Metric	Standard Grade	High Grade	Change
Medium density variation	±0.10 g/cm³	±0.03 g/cm³	–70%
Suspension viscosity	28 cP	19 cP	–32%
Ferro silicon consumption	2.5 kg/t ore	1.2 kg/t ore	–52%
DMC separation efficiency	91.2%	96.7%	+5.5%
Iron recovery to concentrate	91%	95%	+4%

 

Additional Observations:

Lower oxidation: After one month of continuous use, magnetic loss of the high-grade powder was only 4% vs. 16% for standard material.

Less downtime: Medium draining interval extended from 12 hours to 36 hours – saving 8 hours per week in cleaning and recharging.

Slimes control: The ultra-fine, uniform particle distribution reduced interstitial voids, minimizing slimes infiltration into the medium.

 

Financial Impact:

Ferro silicon cost: Increased from 680/tonto680/tonto920/ton (+35%)

Consumption reduction saved 1.56pertonofore(1.56pertonofore(920 × 1.2 kg vs. $680 × 2.5 kg)

Additional iron recovered: 320,000 tons per year × 85/ton=85/ton=27.2 million value

Reduced maintenance and downtime: estimated $450,000/year

 

Net annual benefit: Approximately $28 million

Key Takeaways:

High-grade ferro silicon powder (82–85% Si, ultra-fine mesh) delivers lower consumption despite higher unit price, due to reduced oxidation and stable suspension rheology.

For dense medium separation, particle shape and size uniformity matter as much as chemical purity.

Total cost of ownership (TCO) overwhelmingly favors high-grade material when ore value is high.

 

Conclusion: The mine permanently switched to high-grade ferro silicon powder, achieving payback in less than two weeks. The case confirms that in gravity separation, "high grade" is not a luxury – it is a productivity lever.

 

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