High Silica Fiberglass Mesh Filter for Steel Casting Filtration

Our High Silica Fiberglass Mesh Filter is a high-performance refractory filtration solution specifically engineered for the extreme thermal demands of molten iron and steel casting. Manufactured with a specialized coating and a high-density weave of over 96% silica (SiO2) fibers, this mesh provides a cost-effective alternative to ceramic foam filters while maintaining exceptional structural integrity at continuous operating temperatures up to 1200°C.

By effectively trapping slag, refractory particles, and non-metallic inclusions, our high silica mesh ensures superior metal purity, reduces turbulence in the gating system, and significantly lowers scrap rates in automotive and industrial foundries.

High Silica Fiberglass Mesh Fiber for iron and steel casting

High Silica Fiberglass Mesh Fiber for iron and steel casting 2

High Silica Fiberglass Mesh Fiber for iron and steel casting 3

High Silica Fiberglass Mesh Fiber for iron and steel casting 4

High Silica Fiberglass Mesh Fiber for iron and steel casting 5

1. Technical Specifications of High Silica Fiberglass Mesh Filter

Choosing the right High Silica Fiberglass Mesh Filter depends on your specific casting temperature and metal type. Below is the technical breakdown:

Property Item	Standard Fiberglass Filter Mesh	High-Silica Fiberglass Filter Mesh
Main Material (SiO2)	58% – 65% (Standard-Silica Base)	≥96%(High-Silica Base)
Appearance Color	Yellow / Light Brown	Brown-Red / Dark Brown
Weave Pattern	Leno/ Plain	Leno/ Plain
Hole Size	0.80/1.0/1.2/1.5/2.0/2.5mm	0.80/1.0/1.2/1.5/2.0/2.5mm
Working Temperature	≤800℃	1000-1200℃
Softening Point	Approx. 850℃	≥ 1600℃
Coating Type	Heat-resistant Resin	High-temp Carbonized / Refractory Resin
Gas Evolution	≤40cm³/g	≤30cm³/g
Thickness	0.35- 0.55~mm	0.65 – 0.85~mm
Fiber Diameter	Approx. 0.35mm	0.40 – 0.50~mm
Max Metal Flow Pressure	Lower (Mainly for Aluminum)	45 -150kg/cm² (For Iron/Steel)
Primary Application	Aluminum wheels, gravity casting	Gray iron, ductile iron, steel castings
Special Design	Innovative “cap” design, optionally with or without base, and with or without cap cover, to adapt to different gating systems and filtration needs.	Innovative “cap” design, optionally with or without base, and with or without cap cover, to adapt to different gating systems and filtration needs.
SPEC	Standard Silica Fiberglass Filter Mesh For Aluminum Foundry Filtration Specification1	High Silica Fiberglass Filter Mesh For Iron and steel casting Filtration Specification (1)

2. Why Choose Our High Silica Fiberglass Mesh Filter?

Superior Thermal Stability: The high silica content (> 96%) ensures the filter does not melt or shrink when in contact with high-temperature molten iron or alloys.
Optimized Flow Control: The precision weave reduces “fountain effect” turbulence, allowing for a laminar flow that prevents mold erosion and oxide formation.
Low Gas Emission: Advanced carbonized coating ensures minimal gas release (≤30cm³/g), eliminating blowhole defects in the finished casting.
Exceptional Mechanical Strength: Capable of withstanding the high pressure of metal flow in large gravity casting systems.
Cost-Efficiency: Offers a significant reduction in filtration costs compared to ceramic filters without compromising on slag-removal efficiency.

3. Industry Applications for High Silica Fiberglass Mesh Filter

Our High Silica Fiberglass Mesh Filter is a versatile solution used across diverse metallurgical sectors:

Iron Castings: Ideal for Grey Iron, Ductile Iron (Nodular Iron), and Malleable Iron.Steel Castings: Effective for small to medium steel parts and high-temperature alloy filtration.Gating Systems: Can be used in pouring cups, runner systems, and underneath sprues in sand molds.
Automotive Industry: Used for engine blocks, cylinder heads, and high-precision brake components.

4. Custom Shapes: High Silica Fiberglass Mesh Filter Caps and Bags

To adapt to complex gating systems, we provide the High Silica Fiberglass Mesh Filter in various customized formats:

High Silica Fiberglass Mesh Filter Rolls: Bulk supply for industrial distributors.
High Silica Fiberglass Mesh Filter Sheets: Pre-cut squares and circles for sand molds.
High Silica Fiberglass Mesh Filter Caps: Innovative 3D molded shapes with or without bases for direct placement in the sprue or riser.
High Silica Fiberglass Mesh Filter Bags: Conical and cylindrical designs for high-volume distribution pans.

5. Manufacturing Excellence: The High Silica Fiberglass Mesh Process

Every High Silica Fiberglass Mesh Filter from Explorer (Tianjin) undergoes a rigorous manufacturing process:

Filament Formation: Precisely extruded fibers (4 – 35µm).
Leno Weaving: Ensuring the High Silica Fiberglass Mesh maintains its aperture size under pressure.
Chemical Sizing: Applying heat-resistant resins to enhance the bond and prevent fiber shredding.

6. How to use the High Silica Fiberglass Mesh Filter

Proper installation is key to maximizing the efficiency of your High Silica Fiberglass Mesh Filter. Follow these industry-standard practices:

A. Placement in the Gating System

Sprue Base: Place the High Silica Fiberglass Mesh Filter at the bottom of the sprue to catch impurities before they enter the runners.
Parting Line: For sand casting, sandwich the High Silica Filter Mesh between the cope and drag at the parting line to stabilize flow.
Under the Riser: Placing a High Silica Fiberglass Mesh Filter under the riser helps prevent back-flow impurities from entering the mold cavity.

B. Size Selection Guidelines

Ensure the High Silica Fiberglass Mesh Filter is 10-20mm larger than the runner cross-section to allow for secure seating and prevent bypass.
Choose the appropriate mesh density (e.g., 1.5 X 1.5mm or 2.0 X 2.0mm) based on the viscosity of the molten metal.

C. Operation Precautions

Avoid Direct Impact: Position the High Silica Fiberglass Mesh Filter so the molten metal does not strike the center of the mesh with excessive force from a great height.
Dry Storage: Always store the High Silica Fiberglass Mesh Filter in a dry, ventilated environment to prevent moisture absorption, which could lead to gas defects during casting.