News
Jun. 05, 2026
For the filtration scenarios of high-temperature steel liquid, such as cast steel, alloy steel and stainless steel, our factory mainly offers two core filtration products: zirconia ceramic foam filter and high-silicon oxide fiberglass filter mesh.
These products are specifically designed to address industry pain points, such as slag inclusion in steel liquid, casting defects, rough surface, and non-compliance with mechanical properties.
They are suitable for various high-precision and high-demand casting steel production processes.
| Item | Zirconia Ceramic Foam Filter | High Silica Fiberglass Filter Mesh |
| Core Material | High-purity zirconium dioxide (ZrO₂) powder, after being sintered at high temperature, forms a three-dimensional foam ceramic structure. | ≥96% high-silicon oxide glass fiber yarn woven, with surface coated with high-temperature resistant and fireproof layer |
| Continuous operating Max. temperature | 1600 - 1700℃, capable of withstanding 1760℃ for a short period of time | 1400 - 1620℃, For cast steel applications, the recommended temperature is ≤ 1600℃ |
| Softening point | ≥2500℃ | ≈1700-1750℃ |
| Filtering mechanism | Three-dimensional depth filtration, which includes three core mechanisms: mechanical screening, adsorption interception, and secondary filtration through the filter cake layer. | Two-dimensional planar surface filtration, relying solely on mechanical sieving through mesh structures, lacks the ability for deep adsorption. |
| Filter fineness | It can stably filter out tiny non-metallic inclusions with a size of 2-5 micrometers, and the maximum size can reach up to 1 micrometer. | It can only filter out macroscopic slag particles larger than 1.5mm, but cannot remove fine impurities at the micron level. |
| Gas Emit | Extremely low, no volatile substances after high-temperature sintering, gas volume ≤ 10 mL/g, no risk of air hole defects | Lower, the gas emission of high-quality products is ≤ 60 mL/g |
| Core advantages | 1. The filtration accuracy is extremely high, which can significantly improve the mechanical properties and surface finish of the castings.2. It has excellent performance in all aspects of high temperature resistance, erosion resistance, and thermal shock resistance.3. It has strong chemical stability and does not contaminate the molten metal.4. It can rectify the molten metal, reducing turbulence and entrained gas.5. It has a long service life and can be reused (for certain conditions). | 1. The price is extremely low, with the unit cost being only 1/10 - 1/5 of that of zirconia ceramics.2. Installation and use are extremely convenient. It can be freely cut without the need for complex pre-treatment.3. No preheating is required. It can be used directly, shortening the production cycle.4. It has good flexibility and can be adapted to complex structure casting systems.5. Replacement is convenient without any risk of damage. |
| Applicable scene | 1. High-end precision cast steel parts, aerospace/military/automotive safety structural components2. Working conditions with extremely high requirements for the mechanical properties, surface finish, and internal density of the castings3. Special cast steel materials such as high-temperature alloys, stainless steel, and high-manganese steel4. Deep filtration of large and thick-walled cast steel parts. | 1. Coarse filtration for small and medium-sized ordinary cast steel parts and gray cast iron/spheroidal graphite cast iron parts2. General machinery and hardware accessories with low requirements for casting quality3. Batch production of non-critical load-bearing structural components4. Auxiliary filtration for complex-structured castings, which cannot be used as a standalone core filtration solution |
● The cross-chamber position is precisely filtered to withstand the high-temperature erosion of molten steel and prevent material from falling off.
● It can filter out fine oxide impurities.
● It significantly reduces slag and pores, and reduces scrap.
● It is indispensable for stainless steel, alloy steel, precision castings, flaw detection parts, and large-sized cast steel.
● Used as the first coarse filter for the gate, laid on the gate cup.
● It is convenient to install and has a high cost-effectiveness.
● This mesh can be used alone for mass production of plain carbon steel.
● Suitable for plain carbon steel and medium-small castings, it can intercept large pieces of slag and molding sand.
High-end cast steel: High silica fiberglass mesh to remove large slag and large impurities laying at the front end and large impurities, while zirconia ceramic foam filter is to for precise impurity removal at the rear end. This dual purification process ensures the best quality of molten steel and maximizes the yield of castings.
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