Continuous Casting Mold Powder

Product Specifications

Technical details and manufacturing context for Continuous Casting Mold Powder

Definition

Continuous casting mold powder is a specialized granular flux material applied to the molten steel surface in continuous casting molds. It serves multiple critical functions including thermal insulation to prevent premature solidification, lubrication between the solidifying steel shell and mold wall, and absorption of non-metallic inclusions from the steel. This material is essential for producing high-quality steel slabs, blooms, and billets with smooth surfaces and minimal defects. In B2B supply chains, it's supplied to steel mills as a consumable material that directly impacts casting efficiency and final product quality. The powder is formulated from a blend of oxides and carbon, with typical components including silica (SiO2), calcium oxide (CaO), alumina (Al2O3), fluorite (CaF2), and carbon. Key parameters that define its performance include the basicity index (CaO/SiO2 ratio), melting temperature, viscosity at casting temperature, carbon content, particle size distribution, alkali index, moisture content, bulk density, fluorine content, free carbon, melting rate, sintering temperature, water content, and granule size. These parameters are provided as reference ranges and must be verified for the specific grade and application. The product is used in steelmaking operations and is selected based on casting conditions such as steel grade, casting speed, and mold design. Buyers should confirm that the chosen powder meets their process requirements and any applicable standards. For verification, it is recommended to request technical datasheets and conduct trials under actual casting conditions. Maintenance signals include changes in slag behavior, surface defects on cast products, or inconsistent melting. Failure boundaries include excessive moisture to steam explosions, improper viscosity causing lubrication issues, or incorrect carbon content affecting steel quality. Always consult the supplier for model-specific values and compliance with relevant standards.

Working Principle

The powder melts upon contact with molten steel to form a liquid slag layer that insulates the steel surface, lubricates the mold-steel interface, and absorbs impurities, facilitating smooth withdrawal of solidifying steel. The carbon content controls the melting rate, while the basicity and viscosity influence the slag properties. The slag layer also provides thermal insulation to prevent premature solidification and helps in the removal of non-metallic inclusions. The granule size and bulk density affect feeding and uniform melting. Proper selection and application of the powder are critical for achieving high-quality cast products and operational efficiency.

Common Materials

Silica (SiO2), Calcium Oxide (CaO), Alumina (Al2O3), Fluorite (CaF2), Carbon

Technical Parameters

Parameter	Typical range	Notes & selection driver
Basicity IndexRequired	0.9–1.3 ratio	CaO to SiO2 mass ratio affecting slag viscosity and melting properties
Melting TemperatureRequired	1050–1200 °C	Temperature range at which powder transforms to liquid slag
Viscosity at 1300°CRequired	0.1–0.5 Pa·s	Slag viscosity at typical casting temperature
Carbon ContentRequired	3–12 %	Percentage of carbon controlling melting rate and insulation
Particle Size DistributionRequired	0.1–1.0 mesh	Granular size range for uniform melting and application
Alkali Index	0.2–0.5 %	Na2O + K2O content affecting crystallization behavior
Moisture Content	≤0.5 %	High moisture causes spitting and defects.GB/T 2009
Bulk Density	0.6–0.9 g/cm³	Affects feeding and consumption rate.
Fluorine Content	5–10 %	Controls melting and lubrication; environmental limits.
Free Carbon	2–6 %	Affects melting rate and carbon pickup.
Melting Rate	0.2–0.6 kg/min	Matches casting speed for stable slag layer.
Sintering Temperature	900–1100 °C	Affects slag layer formation.
Water Content	≤0.3 %	High water leads to steam explosions.
Granule Size	0.2–2.0 mm	Affects flowability and melting uniformity.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Silica Base Part
Primary network former determining slag structure and viscosity

Material: Silica (SiO2)
Fluxing Agents Part
Lower melting temperature and modify slag properties

Material: CaO, CaF2, Na2O
Carbon Additive Part
Controls melting rate and provides insulation layer

Material: Carbon black, coke, graphite
Alumina Component Optional Part
Adjusts slag viscosity and crystallization temperature

Material: Al2O3

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Continuous Casting Mold Powder.

Manufacturers of Continuous Casting Mold Powder

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

China Firebrick

Henan, CN

Also makes: Reheating Furnace, Electromagnetic Induction Heater, Molten Metal Flow Control Nozzle and 3 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

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Frequently Asked Questions

What is the function of continuous casting mold powder?

It provides thermal insulation, lubrication between the steel shell and mold, and absorption of non-metallic inclusions, ensuring smooth casting and high surface quality.

What are the key parameters to consider when selecting mold powder?

Key parameters include basicity index, melting temperature, viscosity, carbon content, particle size, and moisture content. These must be matched to the casting conditions and steel grade.

How should mold powder be stored and handled?

Store in a dry environment to prevent moisture absorption, which can cause spitting and defects. Follow the supplier's handling instructions to maintain product integrity.

Why is it important to verify product specifications with the supplier?

The listed parameters are reference ranges; actual values vary by grade. Verification ensures the powder meets your specific process requirements and any applicable standards.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Atmospheric to 0.5 bar (mold pressure conditions)
flow rate:	0.5-2.0 kg/ton steel (powder consumption rate)
temperature:	1450-1600°C (mold operating temperature range)
layer thickness:	20-40 mm (powder bed thickness in mold)
viscosity range:	0.1-10 Pa·s at 1300°C (melted powder viscosity)
slurry concentration:	Not applicable (dry granular application)

Product Specifications

Industry Taxonomies & Aliases

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards