What Is The Current Price Of Calcium Silicon Per Ton?How Are Silicon And Calcium Used in Steelmaking And Casting?

What is the current price of Calcium silicon per ton?

Summary of China's silicon-calcium, silicon-barium, and metallic calcium market prices as of April 10, 2026
(1) National standard silicon calcium (RMB/ton, including tax)
Brand	area	April 10th transaction price	April 9th transaction price	rise and fall
National Standard Ca1	Shaanxi	9200-9400	9200-9400	flat
	Ningxia	9200-9400	9200-9400	flat
	Inner Mongolia	9000-9200	9000-9200	flat
National Standard Ca2	Shaanxi	9100-9300	9100-9300	flat
	Ningxia	9100-9300	9100-9300	flat
	Inner Mongolia	8900-9100	8900-9100	flat
ca28si55	Henan	8200-8300	8200-8300	flat
ca28si50	Henan	7200-7400	7200-7400	flat
(2) Barium silicon (RMB/ton, ex-factory price including tax)
Brand (Natural Block)	area	April 10th transaction price	April 9th transaction price	rise and fall
Si50-55Ba30	Inner Mongolia	6800-7100	6800-7100	flat
	Gansu	6900-7000	--	--
	Qinghai	--	--	--
Si65-75Ba4-6	Qinghai	6100-6150	6150-6200	↓50
	Ningxia	6300-6350	6300-6350	flat
Si65-75Ba2-3	Ningxia	6300-6350	6300-6350	flat
Smelting inoculant Si≥68Ba4-6 (1-3/3-8mm)	Inner Mongolia and Ningxia	6700-6900	6700-6900	flat
	Jiangsu and Shaanxi	7000-7100	7000-7100	flat
(3) Calcium metal series (RMB/ton, cash price including tax)
product	area	April 10th transaction price	April 9th transaction price	rise and fall
Crude Calcium Metal	Shanxi	16800-17000	16800-17000	flat
Metallic calcium wire	Henan	20000-20200	20000-20200	flat
Metallic calcium particles	Henan	19500-19700	19500-19700	flat

How are silicon and calcium used in steelmaking and casting?

Silicon (Si) and calcium (Ca) are widely used in steelmaking and casting as key deoxidizing, desulfurizing, and inclusion-modifying elements. Silicon primarily improves deoxidation efficiency and steel strength, while calcium is mainly used to modify non-metallic inclusions (Al₂O₃, sulfides) and improve steel cleanliness and machinability. In combination (such as in CaSi alloy), they are essential for producing high-quality, clean steel and stable casting performance.

Silicon & Calcium Alloy Specifications (Typical Industrial Grades)

Product	Si (%)	Ca (%)	Al (%)	Fe (%)	C (%)	S (%)	P (%)	Form
FeSi (75%)	≥72–75	-	≤2.0	Balance	≤0.2	≤0.02	≤0.04	Lump
CaSi Alloy	55–65	28–35	≤1.5	Balance	≤1.0	≤0.02	≤0.05	Lump
Si-Ca Cored Wire	30–60	20–35	≤1.5	-	-	≤0.02	≤0.04	Wire
High CaSi	60–70	30–35	≤1.0	Balance	≤0.8	≤0.02	≤0.04	Lump

Particle size: 10–50 mm / 3–10 mm / cored wire
Packaging: 1 MT jumbo bag or steel drum

What is the role of silicon in steelmaking and casting?

Silicon is one of the most important deoxidizing and strengthening elements in steel production. During steelmaking, silicon reacts with oxygen in molten steel to form SiO₂, effectively removing oxygen and improving steel purity.

In steelmaking, silicon improves:

Deoxidation efficiency

Steel strength and hardness

Heat resistance

Elastic limit

In casting, silicon plays an even more critical role in controlling graphite formation in cast iron, improving:

Fluidity of molten iron

Casting structure stability

Crack resistance

Silicon is commonly introduced through ferrosilicon (FeSi 75%), which is the most widely used silicon carrier in industrial metallurgy.

What is the role of calcium in steelmaking and casting?

Calcium is mainly used as a steel cleanliness control element, rather than a strengthening alloy.

In steelmaking, calcium is used to:

Modify solid alumina (Al₂O₃) inclusions into liquid calcium aluminates

Reduce nozzle clogging in continuous casting

Improve steel flowability

In casting, calcium improves:

Sulfide shape control

Machinability of steel

Inclusion morphology (soft, spherical inclusions instead of hard angular particles)

Calcium is highly reactive, so it is usually added in the form of:

Calcium silicon (CaSi) alloy

Cored wire injection systems

This ensures stable absorption and controlled reaction in molten steel.

How do silicon and calcium work together in steel refining?

When used together (especially as CaSi alloy), silicon and calcium create a synergistic refining effect.

Silicon first performs strong deoxidation, reducing oxygen levels in molten steel. Then calcium reacts with remaining oxides and sulfides, transforming them into low-melting, spherical inclusions.

This combined effect results in:

Cleaner steel with fewer inclusions

Improved machinability

Reduced casting defects

Better continuous casting stability

This is especially important in high-grade steel production, such as automotive steel, bearing steel, and pipeline steel.

Grade Comparison: CaSi Alloy vs FeSi, CaSi vs Cored Wire

CaSi Alloy vs FeSi (Ferrosilicon)

FeSi is mainly used for deoxidation and silicon alloying, while CaSi provides both deoxidation and inclusion modification. CaSi is more advanced in refining performance, especially in clean steel production, whereas FeSi is more cost-effective and widely used in bulk steelmaking.

CaSi Alloy vs CaSi Cored Wire

CaSi lump is added directly into molten steel, offering simpler operation but slightly lower efficiency. CaSi cored wire provides:

Higher calcium recovery rate

More precise control

Reduced oxidation loss

Cored wire is preferred in high-end continuous casting systems, while lump CaSi is widely used in general steel plants due to lower cost.

Summary

Silicon and calcium are essential functional elements in steelmaking and casting. Silicon provides deoxidation and strength improvement, while calcium focuses on inclusion modification and steel cleanliness control. When combined as CaSi alloy or cored wire, they significantly improve steel quality, casting stability, and production efficiency, especially in high-grade steel manufacturing.

FAQ – Common Procurement Questions About Silicon & Calcium in Steelmaking

1. Why is silicon used in steelmaking?

Silicon is used mainly as a deoxidizer and strength enhancer, improving steel hardness and reducing oxygen content in molten steel.

2. What is the main function of calcium in steel?

Calcium modifies non-metallic inclusions, making them spherical and less harmful, improving steel cleanliness and machinability.

3. What is CaSi alloy used for?

CaSi alloy is used for deoxidation, desulfurization, and inclusion modification, especially in high-quality steel and continuous casting.

4. What is the difference between CaSi lump and cored wire?

Lump is cheaper and simpler to use, while cored wire offers higher efficiency and better calcium recovery.

5. Can silicon replace calcium in steelmaking?

No. Silicon and calcium have different functions. Silicon deoxidizes, while calcium modifies inclusions. They are complementary, not interchangeable.

6. What steel grades use CaSi alloy?

It is widely used in bearing steel, automotive steel, pipeline steel, and high-strength structural steel.

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