How Is Ferro Silicon Nitride Powder Produced?

What is the price of ferro silicon nitride today?

Here's a table summarizing today's (September 2024) China export prices of ferro silicon nitride (FSN), including pricing terms, product grades, destination markets, and key influencing factors. All prices are based on current market inquiries, exchange rates (USD/CNY ≈ 7.3), and typical trade conditions.

Ferro Silicon Nitride (FSN) – China Export Prices Today (September 2024)

No.	Destination / Region	Grade / Specification	FOB China Port (USD/MT)	CIF Destination Port (USD/MT)	Typical Port of Shipment	Key Influences Today
1	India	Ordinary (Si₃N₄ ≈ 30%, 100 mesh)	1,100 – 1,300	1,250 – 1,450	Tianjin / Qingdao	10–15% import duty; peak steel demand post-monsoon
1	India	High Purity (Si₃N₄ ≥ 50%, 200 mesh)	1,800 – 2,200	1,950 – 2,350	Tianjin / Qingdao	Anti-dumping risk for high purity; strong local demand
2	Vietnam	Ordinary	1,050 – 1,250	1,200 – 1,400	Fangcheng / Shanghai	China–ASEAN FTA = 0% tariff; rising steel capacity transfer
2	Vietnam	High Purity	1,700 – 2,100	1,850 – 2,250	Fangcheng / Shanghai	Short shipping distance keeps freight low ($50–80/MT)
3	Germany	Ordinary	1,300 – 1,500	1,450 – 1,650	Shanghai / Ningbo	EU anti-dumping 5–10% on high-purity; CE needed
3	Germany	High Purity	2,200 – 2,600	2,350 – 2,750	Shanghai / Ningbo	Premium refractories demand; higher logistics cost
4	Italy	Ordinary	1,320 – 1,520	1,470 – 1,670	Shanghai / Ningbo	Euro strength pushes up price; CE mark mandatory
4	Italy	High Purity	2,250 – 2,650	2,400 – 2,800	Shanghai / Ningbo	High-end metallurgy buyers prefer high purity
5	USA	Ordinary	1,400 – 1,600	1,550 – 1,750	Shanghai / Lianyungang	ASTM A144 compliance; no extra tariff; long freight
5	USA	High Purity	2,400 – 2,800	2,550 – 2,950	Shanghai / Lianyungang	EV battery sector demand; ocean freight $200–300/MT
6	Canada	Ordinary	1,420 – 1,620	1,570 – 1,770	Qingdao / Shanghai	Winter freight surcharge +10–15%; clean raw material need
6	Canada	High Purity	2,450 – 2,850	2,600 – 3,000	Qingdao / Shanghai	Refractory upgrade driven by environmental rules
7	Saudi Arabia	Ordinary	1,200 – 1,400	1,350 – 1,550	Qingdao / Shanghai	Vision 2030 infra projects; zero local production
7	Saudi Arabia	High Purity	2,000 – 2,400	2,150 – 2,550	Qingdao / Shanghai	Import-dependent market; stable demand
8	UAE	Ordinary	1,180 – 1,380	1,330 – 1,530	Shanghai / Ningbo	Re-export hub; GCC tariff-free among members
8	UAE	High Purity	1,950 – 2,350	2,100 – 2,500	Shanghai / Ningbo	Prices affected by regional re-export demand
9	Brazil	Ordinary	1,250 – 1,450	1,400 – 1,600	Shanghai / Shenzhen	BRL weakness increases landed cost; iron ore industry use
9	Brazil	High Purity	2,100 – 2,500	2,250 – 2,650	Shanghai / Shenzhen	Mining sector refractories; freight $120–180/MT
10	Turkey	Ordinary	1,280 – 1,480	1,430 – 1,630	Lianyungang / Shanghai	Steel output #2 in Europe; transit role for Eurasia
10	Turkey	High Purity	2,150 – 2,550	2,300 – 2,700	Lianyungang / Shanghai	Black Sea shipping risks affect freight stability

1. How Is Ferro Silicon Nitride Powder Produced?

Step-by-Step Manufacturing of FeSiN Powder for Metallurgical Use

Ferro Silicon Nitride powder is a fine, gray‑metallic powder containing silicon, iron, and nitrogen (typically Si 20–40 %, Fe balance, N 15–25 %). It is produced by introducing nitrogen into a silicon–iron alloy matrix through nitridation or carbothermic processes, followed by crushing and classification.

Production Routes

Method	Process Description	Typical Conditions
Direct nitridation of ferrosilicon	FeSi (commonly FeSi 75) is heated in nitrogen gas	1200–1400 °C, 2–8 h in N₂ atmosphere
Carbothermic reduction + nitridation	SiO₂ + C + Fe + N₂ source melted/reacted together	1500–1600 °C in electric arc or induction furnace
Plasma-assisted nitridation	N₂ plasma accelerates nitrogen diffusion	Lower temp possible, pilot/commercial scale

Typical Steps (Direct Nitridation)

Feed preparation – Crush FeSi lumps to 5–20 mm for better surface exposure.

Charging – Load into refractory retort or rotary kiln.

Purge & heat – Remove air, heat under flowing high‑purity N₂.

Nitridation reaction – Si in FeSi reacts with N₂ to form silicon nitride phases within iron matrix.

Cooling – Cool under N₂ to prevent nitrogen loss.

Comminution – Crush cooled mass to coarse granules.

Grinding & classification – Mill to powder (e.g., −40 to −200 mesh) and sieve to target size distribution.

Packaging – Store in sealed, moisture‑proof containers.

Key Process Controls

Temperature & time determine nitrogen uptake.

Gas purity prevents oxide formation.

Particle size of feed influences reaction rate and final powder fineness.

The result is a high‑reactive powder ideal for rapid dissolution in molten metal processes.

2. What Are The Industrial Applications Of Ferro Silicon Nitride?

Metallurgical and Foundry Uses Across Iron and Steel Industries

Ferro Silicon Nitride is valued for its ability to supply silicon and nitrogen simultaneously, modifying metal microstructure and properties.

Industry	Application	Function	Benefits
Foundry (ductile iron)	Nodulizer (often with Mg/Rare Earths)	Promotes spherical graphite	Higher ductility, strength, uniform properties
Foundry (cast iron)	Inoculant	Enhances graphite nucleation	Reduces chill, improves machinability
Steelmaking	Microalloying agent	Adds Si & N; N forms nitrides with Al/V/Ti	Grain refinement, precipitation strengthening
Specialty alloys	Controlled N source	Enhances creep/wear resistance	Improved high‑temperature performance

Key Advantages

Dual alloying: One addition provides both Si (deoxidation, solid solution strengthening) and N (precipitation hardening).

Cleaner metal: Less oxide slag compared with magnesium treatments.

Cost efficiency: Can replace or reduce use of separate Si and N additives.

Process flexibility: Used in ladle, stream, or mold inoculation depending on application.

Typical Use Cases

Automotive cast components (crankshafts, suspension parts).

Pipelines and fittings made from ductile iron.

High-strength rebar and structural steels.

Machinery parts requiring high wear resistance.

3. What Are Ferro Silicon Nitride Lumps Used For?

Bulk Form Applications in Furnace and Ladle Metallurgy

Ferro Silicon Nitride lumps (irregular pieces, typically 10–80 mm) are the coarse form of the alloy, suited for bulk addition where controlled, slower dissolution is acceptable.

Application	Why Lump Form Is Used	Benefits
Furnace charge in iron/steelmaking	Easier handling, low dust	Economical for large batches, reduced worker exposure
Pre‑alloying in induction/melting furnaces	Gradual Si & N release	Prevents localized over‑treatment
Foundry inoculation (stream addition)	Slower dissolution fits timing needs	Uniform graphite formation, less fading
Export/shipping	Lower packaging cost vs. powder	Reduced fines loss in transit

Characteristics of Lump Form

Low dust generation – safer for workers.

Controlled reaction rate – avoids violent Si/N release.

Economical – lower production cost than fine powder.

Limitations

Slower dissolution than powder, so less suitable where rapid Si/N uptake is critical (e.g., final ladle treatment in steel).

Selection Guide

Use lumps for furnace or early-stage alloying, powder for late-stage precise adjustment in ladle or stream.

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