Zirconia Foam Filter for Steel Casting | High Strength up to 1700°C

Product Details

1. Overview

CC-ZrO zirconia foam ceramic filters feature high strength, excellent thermal stability, a large surface area, and high dimensional accuracy. They are suitable for the production of various cast steel parts, effectively removing macro inclusions from molten metal and achieving stable flow through the adsorption of micro inclusions on their large surface area.

2. Key Advantages

• Wide applicability across processes, including sand casting, investment casting, and precision ceramic casting

• Maximum operating temperature of 1700°C, significantly simplifying gating system design

• Unique 3D mesh structure provides excellent flow rectification, ensuring uniform microstructure in the casting

• Efficient filtration of fine non-metallic inclusions, improving machinability

• Enhanced overall mechanical properties such as surface hardness, tensile strength, fatigue resistance, and elongation

3. Technical Parameters

• Model: CC-ZrO

• Normal Temperature Compressive Strength: ≥ 1.5 MPa

• Bulk Density: 0.8 to 1.0 g per cubic cm

• Porosity: 80 to 85 percent

• Operating Temperature: ≤ 1700°C

• Application Range: Carbon steel, stainless steel, alloy steels

4. Round Filter Specifications

• φ50 x 20mm: Filtration capacity 30 to 90 kg. Carbon steel flow 2.0 kg/s, stainless steel flow 3.0 kg/s.

• φ75 x 25mm: Filtration capacity 60 to 175 kg. Carbon steel flow 3.8 kg/s, stainless steel flow 5.7 kg/s.

• φ90 x 25mm: Filtration capacity 95 to 285 kg. Carbon steel flow 6.4 kg/s, stainless steel flow 9.5 kg/s.

• φ125 x 30mm: Filtration capacity 185 to 550 kg. Carbon steel flow 12.2 kg/s, stainless steel flow 18.4 kg/s.

• φ150 x 30mm: Filtration capacity 265 to 795 kg. Carbon steel flow 17.7 kg/s, stainless steel flow 26.5 kg/s.

5. Square/Rectangular Filter Specifications

• 50 x 50 x 20mm: Filtration capacity 35 to 110 kg. Carbon steel flow 2.5 kg/s, stainless steel flow 3.7 kg/s.

• 50 x 75 x 25mm: Filtration capacity 55 to 170 kg. Carbon steel flow 3.7 kg/s, stainless steel flow 5.6 kg/s.

• 75 x 75 x 25mm: Filtration capacity 85 to 255 kg. Carbon steel flow 5.6 kg/s, stainless steel flow 8.4 kg/s.

• 100 x 100 x 25mm: Filtration capacity 150 to 450 kg. Carbon steel flow 10.0 kg/s, stainless steel flow 15.0 kg/s.

• 125 x 125 x 30mm: Filtration capacity 235 to 700 kg. Carbon steel flow 15.6 kg/s, stainless steel flow 23.4 kg/s.

• 150 x 150 x 30mm: Filtration capacity 340 to 1010 kg. Carbon steel flow 22.5 kg/s, stainless steel flow 33.7 kg/s.

6. Gating System Design

To prevent the filter from impeding pouring flow, the front-end area of the filter should be at least 4 to 5 times the smallest cross-sectional area in the gating system.

Recommended cross-sectional area ratio: Direct sprue area : Filter front-end area : Runner area : Ingate area = 1 : 4.5 : 1.1 : 1.2

Multiple filters can be used simultaneously to increase capacity, provided total pouring flow requirements are met.

7. Installation Methods

• At the Mold Sprue: Pre-reserve a filter seat in the sprue. Place filter after mold firing or pre-heat with mold before pouring. Design filter base with 2mm gaps on all sides and a 5mm support lip.

• In a Dedicated Ceramic Pouring Cup: Attach the pouring cup to the casting during shelling. Pour with filter inside the cup.

• Integrated into the Gating System: Pre-fabricate gating system with filter seat. Reserve openings in shell. After shelling, place filter and seal with water glass or silica sol, then cure before pouring.

Control the molten metal pouring temperature at the upper limit of the process range and maximize pouring speed to avoid cold shuts, misruns, and other casting defects.

8. Important Precautions

• Always blow off dust from the zirconia foam filter with compressed air before use.

• Do not exceed the maximum operating temperature of 1700°C during pouring.

• Minimize direct molten metal impact on the filter. If unavoidable, limit pouring height to 300 to 350mm.

9. Packaging & Storage

• Handle and transport with care. Avoid shock, moisture, extrusion, or impact.

• Store in a dry, well-ventilated area. Protect from rain and heavy stacking.

• Packaging: Cartons with internal trays and interlayer pads. Each carton includes packing list and certificate of conformity.

• Shelf Life: 3 years

10. Get a Quote

Jessie Lee

Qingdao Confident New Materials Co., Ltd.