Ferro silicon powder 68% 0-3mm particle appearance showing fine powder texture, dark gray color and metallic sheen

Ferro silicon powder 68% 0-3mm particle appearance with chemical composition specifications table, showing fine powder texture and size reference

Close up view of ferro silicon powder 68% 0-3mm particles showing individual particle shape,surface detail and metallic luster,with specifications table below

Ferro silicon powder 68% 0-3mm packaging with marking on bag showing product name,origin,net weight printed on woven bag

FeSi 68 Powder – Fine Ferro Silicon Powder for Heavy Media Separation & Welding

Cost-effective 0-3mm granulated Ferro Silicon collected during crushing. Optimized for efficient deoxidation in steelmaking, inoculation in foundry cast irons, exothermic hot topping applications, and as a key component in welding electrode coatings. Features low Carbon and tightly controlled impurities for consistent results.

Main Composition	Si 68-71%, Al ≤2.0%, C ≤0.2%, P ≤0.04%, S ≤0.02% (typical impurities – fully customizable)
Form	Fine powder: -100 mesh, -200 mesh, -325 mesh. Custom particle size distributions available.
Application	Heavy media separation (coal, diamonds, iron ore), welding electrode coatings, chemical synthesis, powder metallurgy
Standard	GB/T 2272-2020, ASTM A100, ISO 5445 (customizable)

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FeSi 68 Powder – Product Overview

FeSi 68 Powder is a cost-effective fine-grade Ferro Silicon product with a silicon content between 68% and 71%. Produced by collecting and screening fines during the crushing of standard 72% ferrosilicon, this material offers an optimized particle size of 0-3mm and tightly controlled impurities. It delivers reliable and consistent performance as a deoxidizer, inoculant, and exothermic agent in steelmaking and foundry applications.

Product Core Advantages

Cost-Effective Deoxidation: Leverages the strong affinity of silicon for oxygen, providing efficient precipitation and diffusion deoxidation at a competitive cost point.
Optimized Particle Size: The 0-3mm granular form ensures rapid dissolution and homogeneous distribution in molten steel and iron, minimizing melting losses.
Consistent & Controlled Chemistry: Low and stable levels of Carbon (≤0.5%), Aluminum, Sulfur, and Phosphorus, making it suitable for a wide range of carbon and low-alloy steel grades.
Strong Inoculating Effect: Promotes the formation of fine, uniformly distributed graphite structures in cast iron, directly improving mechanical properties.
Exothermic Performance: The controlled silicon and aluminum content generates a strong exothermic reaction, making it highly effective for steel ingot hot topping compounds.
Superior Welding Performance: Acts as a key deoxidizer and alloying agent in electrode coatings, stabilizing the arc and refining the weld metal microstructure.

Typical Application Areas

The chemical composition and physical properties of FeSi 68 Powder make it a versatile workhorse in metallurgical processes:

Precipitation Deoxidation in Steelmaking: Added directly to the ladle or furnace to remove dissolved oxygen from molten steel, preventing gas porosity and improving ingot solidification. Its moderate density allows it to penetrate the slag layer effectively.
Diffusion Deoxidation: Used on the slag layer in arc furnaces to reduce FeO content, creating a reducing atmosphere that produces cleaner steel.
Cast Iron Inoculation: Added during the pouring process or as an in-mold treatment to promote graphitization in gray and ductile iron. This reduces the formation of hard iron carbide (chill) and enhances tensile strength and machinability.
Steel Ingot Hot Topping (Exothermic Agent): Blended into powders that are placed on the top of solidifying ingots. The oxidation of silicon generates heat, keeping the feeder head molten and compensating for shrinkage, which significantly increases the usable yield of the ingot.
Welding Electrode Coatings: Incorporated into the flux coating of manual metal arc (SMAW) electrodes to provide deoxidation in the weld pool, alloy the weld metal, and improve arc stability and slag detachability.

For specific application guidance or custom formulations, contact our technical team for personalized recommendations based on your production requirements.

Technical Specifications – FeSi 68 Powder & Ferro Silicon Grades (Customizable)

Our Ferro Silicon is produced to meet international standards with strict quality control. Below is the chemical composition of our primary grades. All specifications (Si content, impurities, size) can be adjusted to your needs.

Chemical Composition (Typical Values, % by weight)

Grade / Designation	Si (%)	Al (%)	C (%)	P (%)	S (%)	Other remarks
FeSi 68 Powder	68-71	≤2.0	≤0.2	≤0.04	≤0.02	Fine powder for heavy media, welding – fully customizable
FeSi 65	65-70	≤3.0	≤0.5	≤0.04	≤0.02	Standard grade for bulk use
FeSi 70	70-72	≤2.0	≤0.2	≤0.04	≤0.02	Versatile for steel/foundry
FeSi 72	72-74	≤2.0	≤0.2	≤0.04	≤0.02	Preferred for nodulizers
FeSi 75	75-80	≤1.5	≤0.2	≤0.04	≤0.02	High-purity steelmaking
FeSi 85	83-88	≤1.0	≤0.1	≤0.03	≤0.01	Special alloys, high-end applications
High‑Purity FeSi 76-79 (Ultra‑low Al/B/Ti/C)	76-79	≤0.01	≤0.015	≤0.015	≤0.003	B≤0.002%, Ti≤0.02%, V≤0.003% – for grain-oriented electrical steels, high‑end alloys

* All values are typical and can be adjusted per customer request. Impurity limits (Al, Ca, C, etc.) are flexible depending on application.

Physical Properties

Property	Value	Unit
Melting Point	1250-1380 (varies with Si content)	°C
Density (at 20°C)	3.0-5.0 (depending on Si%)	g/cm³
Appearance	Silvery-gray fine powder	-
Bulk Density (powder)	2.0-3.0 (varies with mesh size)	g/cm³

Available Particle Sizes – Fully Customizable

Standard mesh sizes: -100 mesh (≤150µm), -200 mesh (≤75µm), -325 mesh (≤45µm)
Custom distributions: Available upon request, including narrow cuts or specific D10/D50/D90 values
Other powder options: 0-2mm, 0-10mm for briquetting or specialized applications

Application Guidelines – FeSi 68 Powder

FeSi 68 Powder is a specialized material designed for critical deoxidation and microstructural control tasks. The following guidelines outline its principal grades of use in steel and iron production.

Deoxidation in Steelmaking

This is the largest volume application. When added to the ladle, furnace, or during tapping, the silicon in FeSi 68 Powder reacts with dissolved oxygen to form silica (SiO₂), which floats into the slag. Its 0-3mm granule size allows it to be projected deep into the steel bath via pneumatic injection for enhanced recovery. For plants aiming to reduce aluminum consumption, this powder provides an excellent balance between deoxidation capacity and cost.

Cast Iron Inoculation & Late Stream Treatment

In foundries, the 0-3mm particle size is ideal for "late" or "in-stream" inoculation. Adding the powder directly into the metal stream during mold pouring ensures the silicon dissolves immediately, creating local silicon-rich zones that act as nuclei for graphite precipitation. This results in a higher nodule count in ductile iron and a refined Type A graphite structure in gray iron, reducing section sensitivity in castings of varying thickness.

Exothermic & Heating Applications

Due to the exothermic nature of silicon oxidation, FeSi 68 Powder is a primary ingredient in hot topping compounds. Applied to the top surface of a solidifying ingot, it reacts and maintains the metal in a liquid state for longer, feeding the shrinkage that occurs naturally as the steel cools. This is crucial for producing high-integrity ingots for forging applications. It is also used in ladle covering compounds to provide thermal insulation and protect the steel from atmospheric oxidation.

Welding Electrode Manufacturing

FeSi 68 Powder is blended into the extruded coating of welding electrodes to serve as both a deoxidizer and an alloy transfer agent. It helps to scavenge oxygen from the weld pool, preventing porosity, while also depositing silicon into the weld metal to strengthen it. The controlled particle size ensures uniform mixing in the dry flux blend and a smooth, consistent arc during welding.

For detailed usage rates or to discuss how FeSi 68 Powder can fit into your specific process route, contact our application engineers.

Packaging & Logistics – FeSi 68 Powder

Packaging Options

We offer various packaging solutions to meet different customer requirements and ensure product integrity during transportation:

1‑ton Jumbo Bags: Common option for large-volume users, easy to handle.
25kg / 50kg Bags: For smaller operations or precise batching.
Moisture-Proof Liners: Available for all packaging options to prevent oxidation.
Custom Packaging: We can accommodate special packaging requests, including steel drums or FIBCs with discharge spouts.

Logistics Information

Parameter	Details
Minimum Order Quantity	20 metric tons (trial orders possible, subject to availability)
Lead Time	15-20 days after order confirmation
Port of Loading	Main Chinese ports (Tianjin, Shanghai, Qingdao, Huangpu)
Shipping Options	FOB, CIF, CFR, DAP (depending on destination)
Payment Terms	T/T, L/C at sight, or negotiable

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Access our technical documentation for detailed product information:

Frequently Asked Questions – FeSi 68 Powder

How does the 0-3mm particle size improve performance as a deoxidizer compared to standard lumps? +

The 0-3mm granulated form provides a significantly higher surface area than traditional 10-100mm lumps. This leads to much faster dissolution kinetics in molten steel, meaning the silicon goes into solution and reacts with oxygen almost instantly. This minimizes melting loss, ensures a more homogeneous distribution of silicon in the bath, and is particularly effective for late additions in ladle metallurgy where timing is critical.

Can you customize the silicon content or impurity levels in FeSi 68 Powder? +

Yes, absolutely. While our standard FeSi 68 Powder has Si 68-71% and standard impurity levels, we can adjust the chemistry to meet your specific requirements. For welding applications, lower Al and Ca may be desired. Please discuss your needs with our technical team.

Is this powder suitable as a cost-effective substitute for standard FeSi 72 in inoculation? +

Yes, it is particularly well-suited for this purpose. Since it is collected during the crushing of FeSi 72, its core chemistry remains highly effective for silicon-based inoculation. The 0-3mm size range is ideal for the most common inoculation methods, including ladle addition, in-stream inoculation, and late-stream treatment. Foundries often use this grade as a high-value solution to manage costs without sacrificing metallurgical quality, as it provides a strong nucleation effect with minimal impact on the base iron composition.

Is it possible to entrust a third-party inspection to check the quality before shipment? +

Certainly, we support third-party inspections by internationally recognized quality inspection agencies such as SGS and BV to verify product quality before shipment. The inspection covers product appearance, weighing, dimensions, and chemical composition analysis. The entire inspection process will be documented with photos and written records, which will be provided to you together with the final inspection report. This ensures you have no concerns regarding product quality.

Do you provide a certificate of analysis with each shipment? +

Absolutely. Every batch of FeSi Powder is tested in our ISO 17025 accredited laboratory, and a Certificate of Analysis (COA) showing Si, Al, Ca, C, P, S, and particle size distribution is provided with the shipping documents.

What is your production capacity for FeSi 68 Powder? +

We have an annual production capacity exceeding 30,000 metric tons of ferrosilicon powder across various grades and mesh sizes. We can accommodate both containerized and bulk vessel shipments.

What is the current ferro silicon 68% powder price? How to get a quotation? +

Ferro silicon price varies based on silicon content (e.g., FeSi 65,FeSi 68,FeSi 70, FeSi 72, FeSi 75, FeSi 85,high purity FeSi 76-79), quantity, particle size, and delivery terms (FOB/CIF). For the latest ferrosilicon 68% powder price, please submit a quotation request with your specifications. We respond within 24 hours with a detailed offer including chemical analysis report.