What it is
Used for deoxidation and silicon adjustment in steelmaking and steel foundries, and for in-furnace silicon correction in iron foundries.
Ferroalloys · Silicon series
Ferrosilicon
Used for deoxidation and silicon adjustment in steelmaking and steel foundries, and for in-furnace silicon correction in iron foundries.
Product codeFA-FESI
Industry application3
Key indicatorsSi · C · Al / Ca / P / S / Ti
Order boundaryQuotation and order confirmation
QUICK DECISION
Four answers before reading the technical detail
This section supports initial screening; final grade, addition and effects require operating conditions, formal documents and plant validation.
What it does
- Deoxidation
- Silicon adjustment
- Alloying
Where it fits
- Tapping deoxidation and ladle/LF alloying
- Post-melt trimming, tapping/ladle deoxidation and alloying
- In-furnace silicon correction or post-melt trimming
Boundary not to miss
- Oxidising slag reduces recovery
- Poor control of Al, Ti, C and other residuals can cause inclusions or grade deviations
- Late addition or unsuitable sizing may cause incomplete dissolution and chemistry variation
SELECTION BOUNDARY
Start with the selection boundary
A grade name such as FeSi75 is not a complete commercial specification. Confirm Si plus Al, Ca, C, P, S, Ti and other residuals, sizing, form and applicable standard; ordinary FeSi and FeSi-based inoculants are separate selections.
PRODUCT MANUFACTURING
Product manufacturing process
Typical ferrosilicon is smelted from silica, an iron source and carbonaceous reductants in a submerged-arc furnace, then cast, cooled, crushed and screened. Raw materials and furnace practice vary by producer.
- 01Inspect and batch silica, iron source and reductants
- 02Carbothermic smelting in a submerged-arc furnace
- 03Tap, separate slag/metal and cast
- 04Cool, crush, screen and sample
- 05Pack by grade and size
Ferrosilicon production-process referenceElkem Iceland's published production-process page; a producer reference, not a Jinsheng production line.Elkem Iceland · 2026-08-14Reference background: Jarle Vines (Jarvin) · CC BY 3.0- 1Raw materials and furnace
- 2Reduction and tapping
- 3Crushing and screening
- 4Testing and packing
The public external reference helps explain a similar product or typical process; it is not evidence of a Jinsheng-owned line, stock or customer site.
Background source: Jarle Vines (Jarvin) ↗Licence: CC BY 3.0 ↗The site display uses responsive cropping and a dark readability overlay; source-file pixels are unchanged.
SPECIFICATIONS & PACKAGING
Grades, specifications, indicators and packaging
Si is the principal indicator, with Al, Ca, C, P, S and Ti controlled by application. Lump, granule, powder and cored-wire feed must be managed as different supply forms.
- 01Confirm FeSi grade and standard version
- 02Check main content and impurity guarantees
- 03Select size/form for charging equipment
- 04Confirm pack, moisture control and lot COA
GRADES & SPECIFICATIONS
Grades, specifications, indicators and packaging
Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.
| Grade / family | Chemistry | Size and form | Packaging |
|---|---|---|---|
| Specification direction 01FerrosiliconConfirm grade, applicable standard and guaranteed values before quotation |
| Confirm against the addition method, equipment and order requirements | Confirm pack format, net weight and labels in the quotation and order |
| Specification direction 02FerrosiliconConfirm grade, applicable standard and guaranteed values before quotation |
| Confirm against the addition method, equipment and order requirements | Confirm pack format, net weight and labels in the quotation and order |
| Specification direction 03FerrosiliconConfirm grade, applicable standard and guaranteed values before quotation |
| Confirm against the addition method, equipment and order requirements | Confirm pack format, net weight and labels in the quotation and order |
| Specification direction 04FerrosiliconConfirm grade, applicable standard and guaranteed values before quotation |
| Confirm against the addition method, equipment and order requirements | Confirm pack format, net weight and labels in the quotation and order |
| Specification direction 05FerrosiliconConfirm grade, applicable standard and guaranteed values before quotation |
| Confirm against the addition method, equipment and order requirements | Confirm pack format, net weight and labels in the quotation and order |
ORDER SPECIFICATION CONFIRMATION
What must be confirmed before this becomes an order specification
Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.
- 01Confirm the product, grade, application and supply scope
- 02Fix guaranteed chemistry, sizing, form and packing in the quotation and order
- 03Agree sampling, test methods, acceptance rules and lot COA fields
- 04Confirm the required TDS, SDS/PSI, labels and delivery documents
SELECTION AND COMPARISON
Compare specification directions by indicators and operating conditions
Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.
01Specification direction
Ferrosilicon
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- SiC
- Size and form
- Confirm against the addition method, equipment and order requirements
- Packaging
- Confirm in the quotation and order
02Specification direction
Ferrosilicon
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- SiC
- Size and form
- Confirm against the addition method, equipment and order requirements
- Packaging
- Confirm in the quotation and order
03Specification direction
Ferrosilicon
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- SiCAl / Ca / P / S / Ti
- Size and form
- Confirm against the addition method, equipment and order requirements
- Packaging
- Confirm in the quotation and order
04Specification direction
Ferrosilicon
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- SiCAl / Ca / P / S / Ti
- Size and form
- Confirm against the addition method, equipment and order requirements
- Packaging
- Confirm in the quotation and order
05Specification direction
Ferrosilicon
Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.
- Key indicators
- SiC
- Size and form
- Confirm against the addition method, equipment and order requirements
- Packaging
- Confirm in the quotation and order
INDUSTRY APPLICATION
Industry, furnace, material and addition point
Confirm the process position before method and quantity calculations; an application relationship for one furnace or material must not be copied to another.
Steelmaking plants
Tapping deoxidation and ladle/LF alloying
- Furnace / equipment
- BOF, EAF and LF
- Material / output
- Carbon and alloy steels, plus reviewed special grades
Steel foundries
Post-melt trimming, tapping/ladle deoxidation and alloying
- Furnace / equipment
- EAF, induction furnace and ladle treatment
- Material / output
- Carbon, low-alloy and high-alloy cast steels
Iron foundries
In-furnace silicon correction or post-melt trimming
- Furnace / equipment
- Cupola, induction and duplex melting
- Material / output
- Base iron for grey, ductile and CGI, plus alloyed cast iron
APPLICATION METHOD
Application method and effect validation
For deoxidation, silicon adjustment or alloying, calculate from melt analysis, required net increase and site recovery; no universal dose is published without process conditions.
- 01Confirm grade, furnace and addition point
- 02Calculate net addition from analysis and recovery
- 03Add under the plant practice and ensure dissolution/mixing
- 04Resample to verify Si, inclusions and endpoint
PROBLEM AND SOLUTION
From operating objective to effect verification
Each application explains the role, method, quantity principle and risk boundary; the final proposal is confirmed against operating conditions and lot documents.
01
Steelmaking plants
Tapping deoxidation and ladle/LF alloying
- Furnace / equipment
- BOF, EAF and LF
- Material / output
- Carbon and alloy steels, plus reviewed special grades
- Method
- Add in the tapping stream or during ladle refining under the approved practice, with adequate dissolution and stirring; sequence must match the deoxidation route and slag condition.
- Quantity determination
- Use decimal mass fractions consistently. General equation: ⟦m_add(kg) ≈ m_melt(t) × 1,000 × Δw_Si ÷ (w_Si,product × η_Si)⟧. The net-increase term means target Si minus measured Si; enter all mass fractions as decimals, for example 0.20 wt.% as 0.002. Then correct for slag oxidation, temperature and plant history.
Expected effects
- Lowers oxygen potential and establishes target silicon
- Creates conditions for final alloy trimming
Limits and risks
- Oxidising slag reduces recovery
- Poor control of Al, Ti, C and other residuals can cause inclusions or grade deviations
02
Steel foundries
Post-melt trimming, tapping/ladle deoxidation and alloying
- Furnace / equipment
- EAF, induction furnace and ladle treatment
- Material / output
- Carbon, low-alloy and high-alloy cast steels
- Method
- Induction practice relies on clean, known charge and chemistry correction; EAF timing must follow the oxidising/reducing slag practice.
- Quantity determination
- Calculate from melt analysis, target silicon and furnace-specific recovery; do not transfer EAF recovery assumptions directly to an induction furnace.
Expected effects
- Deoxidises and adjusts silicon in cast steel
Limits and risks
- Late addition or unsuitable sizing may cause incomplete dissolution and chemistry variation
03
Iron foundries
In-furnace silicon correction or post-melt trimming
- Furnace / equipment
- Cupola, induction and duplex melting
- Material / output
- Base iron for grey, ductile and CGI, plus alloyed cast iron
- Method
- Add with the charge, during melting or after melt-down according to charge calculation and analysis; manage separately from the dedicated pre-pour inoculant.
- Quantity determination
- Calculate from current and target base-iron Si, actual product Si and furnace-specific recovery.
Expected effects
- Establishes target base-iron silicon
Limits and risks
- Ordinary FeSi for silicon correction does not replace an active-element inoculant
STORAGE & SAFETY
Storage, handling and risk
- Keep dry and never introduce wet material directly into molten metal; control dust and fines according to the supplied form.
- The official SDS/PSI must be verified against the company's actual composition and destination market.
This section does not replace the company's final SDS/PSI or the plant safety procedure.
REFERENCE AND ORDER BOUNDARY
Use industry references to understand, then order documents to confirm
Supply specifications, packaging, lead time and quality documents are subject to the formal quotation and order confirmation.
DOCUMENTS & MEDIA
Images, TDS, SDS and COA
Document availability depends on the product, lot, destination market and order agreement.
TDS
Confirms product identity, guaranteed indicators, sizing, form and packing.
SDS / PSI
Confirms storage, handling, protection and market-specific safety information.
COA
Links a specific lot to test items, results, methods and issue information.
Industry reference image of ferrosilicon; it does not represent a Jinsheng grade, size or lot.
The source file is unchanged; the page displays the complete image responsively without cropping.INDUSTRY TECHNICAL REFERENCES
Selected external reference material
The following items come from licensed public media or original producer websites and explain similar products or typical processes only. They are not Jinsheng photographs, TDS, SDS or lot COA and create no supply commitment.
Ferrosilicon production-process reference
Elkem Iceland's published production-process page; a producer reference, not a Jinsheng production line.
Elkem Iceland · 2026-08-14Open reference ↗Official ferrosilicon product reference
Elkem's published FeSi product, production and application overview; not a Jinsheng TDS.
Elkem · 2026-08-14Open reference ↗Official FeSi alloy PSI
Elkem Product Safety Information. It is a safety-reference document, not a Jinsheng SDS.
Elkem · 2026-08-14Open reference ↗COA field template (not a certificate)
A blank structure for lot, chemistry, sizing, method, disposition and issue data. It contains no test result and cannot be used for delivery.
Jinsheng blank COA field template · 2026-08-14Open field template ↗SOURCES
Public references and verification dates
- GB/T 2272—2020 Ferrosilicon ↗Standard · 2026-08-14
- Elkem ferrosilicon product and application overview ↗Manufacturer source · 2026-08-14
Public sources supplement general facts; they do not replace Jinsheng's formal product specification, TDS or lot COA.
INQUIRY PREPARATION
Prepare these operating conditions for a more precise technical response
Please provide the specification, quantity, destination, and contact information.
Already includedFA-FESIFerrosilicon
- 01Target industry, steel grade or casting material
- 02Furnace type, equipment, melt weight and current operating practice
- 03Measured chemistry, target chemistry and permitted residuals
- 04Planned addition point, temperature, slag and stirring conditions
- 05Current product, addition, recovery or operating-issue record
- 06Required size, form, packaging, quantity and destination
- 07Available melt analysis, microscopy, photographs or trial results
TECHNICAL AND QUOTATION CONSULTATION
Send the operating conditions for human review
Domestic inquiries are handled by the Domestic Sales Department and international inquiries by the International Sales Department. Price, availability and lead time are confirmed for each inquiry based on specification, quantity and delivery location.