How Is Ferro Silicon Nitride 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 Produced?

Overview of Raw Materials, Reaction Conditions, and Process Types

Ferro Silicon Nitride (FeSiN) is a ferroalloy containing silicon, iron, and nitrogen, typically with compositions such as Si 20–40 %, Fe balance, and N 15–25 %. Production involves reacting ferrosilicon with nitrogen gas or nitrogen‑containing compounds under controlled temperature and pressure.

Main Production Routes

Route	Description	Conditions
Direct nitridation of ferrosilicon	FeSi (often FeSi 75) is heated in N₂ atmosphere	1200–1400 °C, several hours; slow solid‑state diffusion
Carbothermic reduction + nitridation	Mixture of SiO₂, C, Fe, and N₂ source reacted together	1500–1600 °C in electric arc furnace or induction furnace
Plasma or microwave-assisted nitridation	Enhanced kinetics using plasma/N₂ plasma or microwaves	Faster, lower temp possible; research/commercial trials

Typical Steps (Direct Nitridation)

Charge preparation: Crush FeSi 75 lumps to increase surface area.

Heating: Place charge in retort or reactor; purge air with inert gas.

Nitridation: Introduce high‑purity N₂; maintain temperature until desired N content reached.

Cooling: Under N₂ to prevent decomposition.

Crushing/sizing: Produce granules or powder for downstream use.

Key Factors

Particle size affects reaction rate.

Excess N₂ pressure can improve penetration but must avoid excessive cost.

Impurities (Al, Ca) may influence nitride phase formation.

2. How Is Ferro Silicon Nitride Manufactured?

Industrial Manufacturing Methods and Process Control

Manufacturing Ferro Silicon Nitride follows similar principles to production but emphasizes scalable, continuous or batch industrial methods with quality control.

Industrial Approaches

Method	Principle	Equipment	Advantages
Batch furnace nitridation	Load FeSi in refractory retorts; heat in N₂	Rotary kilns, muffle furnaces	Simple, good for small batches
Electric arc furnace route	Combine SiO₂ + C + Fe + N₂ source, melt and react	Arc furnace	Continuous potential, high throughput
Induction melting + nitridation	Melt FeSi, inject N₂ or NH₃ gas	Induction furnace	Precise temperature control, uniform product

Process Flow Example (Arc Furnace)

Raw material mixing: SiO₂, Fe ore/metal, carbon reductant, flux.

Melting: Heat to >1500 °C in N₂ atmosphere.

Reaction: Si formed in situ reacts with N₂ → Si₃N₄ and FeSiN phases.

Tapping: Molten alloy tapped into molds or water‑cooled copper chillers.

Crushing/classification: Obtain desired particle size distribution.

Quality Control

Monitor Si, Fe, N contents via spectrometry.

Limit residual free Si or unreacted Fe to meet spec.

Ensure low oxygen to avoid oxide inclusions.

Manufacturing aims for consistent nitride phase distribution and minimal porosity for metallurgical performance.

3. What Is the Purpose of Ferro Silicon Nitride?

Metallurgical Functions and Benefits in Steel & Foundry Industries

Ferro Silicon Nitride is valued for its dual alloying and nodularizing effects in iron and steel production.

Primary Purposes

Application	Function	Benefit
Ductile iron (nodular cast iron) production	Acts as nodulizer alternative to Mg or rare earths	Promotes spheroidal graphite, improves mechanical properties
Inoculation of cast iron	Enhances nucleation of graphite	Reduces chill, refines structure, improves machinability
Steel deoxidation & alloying	Supplies Si and N; N strengthens steel	Increased strength, precipitation hardening
Specialty steel microalloying	N combines with Al/V/Ti to form nitrides	Grain refinement, enhanced creep resistance

Advantages Over Other Additives

Lower cost compared to pure Mg treatment in ductile iron.

Dual effect: Si alloying + N strengthening in one addition.

Cleaner metal: Less slag formation than Mg treatments.

Controlled N content avoids excessive gas defects.

Typical Usage

Added during late stages of metal treatment or in ladle.

Particle size chosen for rapid dissolution without excessive fuming.

Ferro Silicon Nitride thus enables stronger, more ductile iron castings and fine‑grained, high‑strength steels in a cost‑effective way.

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