Views: 0 Author: Site Editor Publish Time: 2026-05-19 Origin: Site
If you work in steel production or foundry, you’ve probably already realized one thing: calcium silicon (CaSi) is not just another ferroalloy. It’s a critical material for controlling inclusions, modifying non-metallic phases, and improving final steel quality.
But finding the right calcium silicon lump supplier at a fair calcium silicon price – that’s where things get tricky.
This guide covers everything you need to know: from real-world usage in secondary steelmaking to current price drivers, and why Hongshun has become a go-to name for international buyers.
Calcium silicon is an alloy made mainly of calcium (Ca) and silicon (Si), typically with minor amounts of iron, aluminum, and carbon. It comes in irregular lumps (10–50mm or 10–100mm) or crushed granular forms.
Common grades (Chinese standard):
Ca28Si60
Ca30Si60
Ca31Si60
Higher calcium content usually means better inclusion modification, but it also affects calcium silicon price significantly.
For most steel mills, Ca31Si60 is the sweet spot – good performance without overpaying for excessive calcium.
You don’t use calcium silicon as a bulk alloy. You use it in the ladle during secondary metallurgy. Here’s what it actually does:
Alumina (Al₂O₃) inclusions are hard, sharp, and ruin mechanical properties. Calcium modifies them into low-melting-point calcium aluminates that are spherical and harmless.
Result: Better fatigue life, ductility, and cold formability – essential for auto-grade steel, pipeline steel, and heavy plates.
CaSi helps lower sulfur further after the EAF or BOF. The calcium reacts with sulfur to form CaS, which floats into the slag.
Typical practice: Add CaSi wire or lumps after aluminum deoxidation.
This is a silent killer in casting. Without calcium treatment, alumina builds up inside the submerged entry nozzle (SEN). With proper CaSi addition, clogging drops dramatically – fewer casting interruptions, less refractory waste.
Calcium silicon is a strong deoxidizer, but it’s rarely used alone. Most mills combine it with aluminum or silicon-manganese, then use CaSi for fine-tuning.
Pro tip from steelmakers: Using too much calcium can cause reoxidation or affect refractory life. Stick to recommended ladle addition rates – usually 0.5–1.5 kg per ton of steel.
If you’ve been tracking calcium silicon price quotes, you’ve seen volatility. Here are the real drivers:
Factor | Impact |
|---|---|
Raw coke and quartz costs | Direct influence on Si production |
Calcium metal supply (China) | China produces >80% of global CaSi. Any environmental or energy policy change moves the market. |
Freight & container rates | Bulk lump shipments from China to Europe or Americas – freight can double the landed cost. |
Grade and size | Ca30 is cheaper than Ca31. Fine powder is cheaper than clean lumps. |
Order volume | LCL (less container load) pays higher per-ton price than full 20FT or 40FT container. |
Current reference range (FOB China, Q1 2026):
Ca28Si60 lumps: USD 1,450–1,550/MT
Ca31Si60 lumps: USD 1,550–1,680/MT
Note: Prices change monthly. Contact Hongsun for today’s offer.
Not all CaSi lumps are the same. A bad batch can destroy your steel quality or clog your feeding system.
Request a mill certificate for each lot. Watch for:
Ca content within ±1% of target
Low Al (controls reoxidation)
Low C and P (critical for low-carbon steel grades)
Good supplier screens lumps properly. Too many fines (<5mm) cause dust loss and uneven feeding. Too many oversize lumps (>100mm) jam the hopper.
Hongshun standard: 10–50mm lumps, fines <5% by weight.
Calcium silicon is hygroscopic. Wet lumps cause hydrogen pickup in steel.
Look for:
Heavy-duty woven bags with PE liner
Or 1 MT big bags, strapped for container loading
A supplier who doesn’t understand LC documentation, vessel booking, or Chinese export declarations will cost you delays.
Hongshun ships to Turkey, Egypt, Russia, South Korea, Mexico, and more – average lead time 15–25 days after payment.
You’ve seen the generic trading companies. Hongsun is different.
We don’t play middleman. Our calcium silicon comes from partnered smelters in Ningxia and Inner Mongolia – China’s ferroalloy hub. You get mill-direct pricing.
We test every batch before packing. No surprises in your ladle.
Need 10–30mm for cored wire? 10–60mm for manual addition? Just tell us. We also offer 25kg small bags or 1.2MT jumbo bags.
Our team answers technical questions: “What CaSi grade for API pipe steel?” “How to adjust feeding rate for 150mm nozzle?” – we’ve been there.
Because we consolidate orders and optimize logistics, we beat most traders’ quotes while maintaining quality.
Send inquiry – tell us grade, lump size, quantity (typically 20–200MT per container), and destination port.
Receive offer – FOB China or CIF basis, with lab analysis and packing details.
Confirm proforma invoice – payment terms: T/T or L/C at sight.
Production & third-party inspection – SGS or Bureau Veritas available at your cost.
Loading & shipment – we handle export customs and provide full shipping documents.
Delivery – typically 30–45 days to major ports like Rotterdam, Houston, Jebel Ali, or Busan.
Q: What is the minimum order quantity (MOQ) from Hongsun?
A: 20 metric tons (one palletized lot). For trial orders, we can do 10MT by LCL.
Q: Can you supply CaSi cored wire instead of lumps?
A: Yes. We offer Ø13mm and Ø16mm cored wire with CaSi powder filling. Just ask for a separate quote.
Q: How do you ensure low moisture in lumps?
A: We store CaSi in dry warehouses and add moisture-absorbing bags inside each drum or big bag upon request.
Q: Do you provide a COA (Certificate of Analysis) with every shipment?
A: Absolutely. Each lot has its own COA from our lab or an accredited third party.
Q: Is Hongsun a registered exporter?
A: Yes. Full customs license, ISO 9001 quality management, and 8+ years in ferroalloy export.
Stop chasing unreliable quotes. Get a real calcium silicon price from a supplier who delivers consistent lumps for ladle metallurgy.
Tell us your target grade, lump size, and destination – we’ll reply within 24 hours with a competitive offer and COA sample.
Calcium silicon is a small-cost input with a huge impact on steel quality. Overpaying for inconsistent material is just as bad as buying cheap, wet lumps full of fines.
Work with Hongshun – a calcium silicon lump supplier that understands steelmaking, not just shipping containers. Request a sample or a price quote today. Your ladle metallurgy will thank you.
