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Refractory raw materials · Ferroalloy powder

Refractory-grade ferrosilicon powder

Aliases: Ferrosilicon antioxidant powder for refractories · Refractory-grade FeSi fine powder

A refractory-application fine-powder family made from composition-confirmed ferrosilicon through controlled crushing, milling, classification, homogenisation, sampling and moisture-protected packing. It may serve as an antioxidant addition in validated carbon-containing refractory formulations such as MgO-C. Chemistry, sizing, surface condition and use require a formal TDS, powder SDS/PSI, lot COA and finished-product trials.

Antioxidant addition for carbon-containing refractoriesRefractory fine-powder application-grade controlFormulation and finished-product trial validation
View grades and specifications
Refractory-grade ferrosilicon powder · Product form reference
Product codeRF-FESI-POWDER
Industry application1
Key indicatorsSi / Fe · Al / Ca / C / P / S / Ti / O · D10 / D50 / D90 / top cut / oversize
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.

01

What it is

A refractory-application fine-powder family made from composition-confirmed ferrosilicon through controlled crushing, milling, classification, homogenisation, sampling and moisture-protected packing. It may serve as an antioxidant addition in validated carbon-containing refractory formulations such as MgO-C. Chemistry, sizing, surface condition and use require a formal TDS, powder SDS/PSI, lot COA and finished-product trials.

02

What it does

  • Antioxidant addition for carbon-containing refractories
  • Refractory fine-powder application-grade control
  • Formulation and finished-product trial validation
03

Where it fits

  • Closed metering and mixing after approval of a separate powder specification
04

Boundary not to miss

  • Mismatched chemistry, sizing, oxidation or dispersion may cause abnormal reaction, volume change, porosity, structure or performance variation; powder risk requires separate control

SELECTION BOUNDARY

Start with the selection boundary

This page covers only refractory-application ferrosilicon fine powder. It is not ordinary steelmaking FA-FESI lump/granule, an FeSi-base inoculant, cored-wire feed, silicon-metal powder, microsilica, SiC or a mechanical powder blend. An FeSi grade name does not replace a powder specification. Until an actual SKU, TDS, powder SDS/PSI and lot COA are available, this record supports technical RFQs and sample review only and does not claim stock.

PRODUCT MANUFACTURING

Product manufacturing process

Refractory-grade ferrosilicon powder is generally prepared from identity- and chemistry-confirmed ferrosilicon feed by enclosed crushing, milling, classification, homogenisation, representative sampling and sealed packing. Equipment, milling media, contamination controls and target sizing vary by supplier and application grade; this page describes only a general industry route and not a Jinsheng-owned line.

  1. 01Verify ferrosilicon feed identity, source, lot chemistry and safety information
  2. 02Crush in an enclosed dust-controlled system and use mechanical or jet milling as specified by the actual route
  3. 03Classify for the application, controlling the full particle-size distribution, coarse-particle limit and excess fines
  4. 04Homogenise and sample representatively, then review finished chemistry, sizing, moisture and foreign contamination
  5. 05Seal and moisture-protect the powder, retaining lot traceability and release documents

SPECIFICATIONS & PACKAGING

Grades, specifications, indicators and packaging

Specification selection must confirm product identity, guaranteed chemistry, sizing, form, packing, test method and order use together.

  1. 01Confirm the refractory application-grade identity, supplier's formal SKU and feedstock route
  2. 02Use the TDS to fix Si, Fe and application-relevant Al, Ca, C, P, S, Ti, O items and their test methods
  3. 03Agree the sizing method, dispersion conditions, D10/D50/D90, top cut or oversize, and coarse-particle and fines controls
  4. 04Review surface oxidation, moisture, bulk density, milling-media carryover and other contamination controls
  5. 05Release only after confirming pack, logistics, SDS, sampling plan, retained sample 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 / familyChemistrySize and formPackaging
Specification direction 01Refractory-grade ferrosilicon powderConfirm grade, applicable standard and guaranteed values before quotation
  • Si / FeConfirm in inquiry
  • Al / Ca / C / P / S / Ti / OConfirm in inquiry
  • D10 / D50 / D90 / top cut / oversizeConfirm in inquiry

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.

  1. 01Confirm the product, grade, application and supply scope
  2. 02Fix guaranteed chemistry, sizing, form and packing in the quotation and order
  3. 03Agree sampling, test methods, acceptance rules and lot COA fields
  4. 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

Refractory-grade ferrosilicon powder

Compare the key indicators below, then confirm grade, guaranteed values, sizing and packing against the operating conditions.

Key indicators
Si / FeAl / Ca / C / P / S / Ti / OD10 / D50 / D90 / top cut / oversize
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.

01

Refractory producers

Closed metering and mixing after approval of a separate powder specification

Furnace / equipment
Closed batching, mixing and forming systems for carbon-containing shaped refractories and formulation-confirmed monolithics
Material / output
Technically reviewed MgO-C, magnesia-calcia-carbon, alumina-magnesia-carbon and other carbon-containing refractory formulations

APPLICATION METHOD

Application method and effect validation

Refractory-grade ferrosilicon powder may be evaluated as a silicon-bearing constituent in carbon-containing shaped or unshaped refractory formulations, but suitability depends on the base materials, carbon source, binder system, sizing and dispersion, forming or installation route, atmosphere and heat-treatment schedule. This page provides no cross-formulation fixed dose, recovery or performance uplift; laboratory trials, production trials and service evaluation must establish the window.

  1. 01Define the shaped product or installation mix, failure mode, intended function and prohibited carry-in elements
  2. 02Review lot TDS, SDS and COA, and assess feed phase, finished sizing, moisture and contamination risks
  3. 03Meter to the trial formulation under controlled dust conditions and disperse thoroughly with aggregate, fines, carbon source and binder
  4. 04Complete forming or installation, curing or drying and controlled heat treatment for the selected process without transferring schedules across formulations
  5. 05Use control samples to validate phases, microstructure, volume change, strength, oxidation resistance and service-relevant properties, establishing approval and stop criteria

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

Refractory producers

Closed metering and mixing after approval of a separate powder specification

Furnace / equipment
Closed batching, mixing and forming systems for carbon-containing shaped refractories and formulation-confirmed monolithics
Material / output
Technically reviewed MgO-C, magnesia-calcia-carbon, alumina-magnesia-carbon and other carbon-containing refractory formulations
Method
Confirm Fe-Si feed identity, finished chemistry, full size distribution, surface oxidation, moisture, milling contamination, binder, heat treatment and service atmosphere, then establish dispersion, mixing and the process window by trial.
Quantity determination
Determine from the formal formulation, measured finished-product values, sizing/reactivity and trial results; no fixed addition is published across formulations, binders or equipment.
Expected effects
  • May support antioxidant-system design in a compatible carbon-containing refractory formulation
Limits and risks
  • Mismatched chemistry, sizing, oxidation or dispersion may cause abnormal reaction, volume change, porosity, structure or performance variation; powder risk requires separate control

STORAGE & SAFETY

Storage, handling and risk

  • Keep dry, sealed, lot-segregated and protected from contamination; assess deposits, static, ignition sources, combustibility/explosibility and explosion-protected collection for the actual powder.
  • Handling, cleaning and PPE must follow the latest SDS/PSI for the actual SKU and destination rules; powder risk cannot be inferred from ordinary ferrosilicon-lump documentation.

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 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.

Blank COA template

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

  1. GB/T 2272—2020 Ferrosilicon (feedstock-identity reference)Standard · 2026-08-21
  2. GB 15577—2018 Safety regulations for dust explosion prevention and protectionStandard · 2026-08-21
  3. ISO 13320:2020 Particle size analysis—laser diffraction methodsStandard · 2026-08-21
  4. Elkem refractory silicon powders and Si-RG75 ferrosilicon-powder production overviewManufacturer source · 2026-08-21

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 includedRF-FESI-POWDERRefractory-grade ferrosilicon powder
  1. 01Target industry, steel grade or casting material
  2. 02Furnace type, equipment, melt weight and current operating practice
  3. 03Measured chemistry, target chemistry and permitted residuals
  4. 04Planned addition point, temperature, slag and stirring conditions
  5. 05Current product, addition, recovery or operating-issue record
  6. 06Required size, form, packaging, quantity and destination
  7. 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.