Ceramic Foam Filter
Ceramic foam filter is a new type of material used to filter fluids such as molten metal. It has a unique structure and excellent performance and is widely used in industries such as casting.
1. Alumina:
Applicable temperature: 1250℃. Suitable for filtering and purifying aluminum and alloy solutions. Widely used in ordinary sand casting and permanent mold casting such as automotive aluminum parts casting.
Advantages:
(1) Remove impurities efficiently.
(2) Steady Molten aluminium flow and easy for filling.
(3) Reduce casting defect, improve surface quality and product properties.
2. SiC
It has excellent strength and resistance to high temperature impact and chemical corrosion, and can withstand high temperatures up to about 1560°C. It is suitable for casting copper alloys and cast iron.
Advantages:
(1) Remove impurities and improve the purity of molten metal efficiently.
(2) Reduce turbulence and even filling.
(3) Improve casting surface quality and yield, reduce defect risk.
3. Zirconia
The heat-resistant temperature is higher than about 1760℃, with high strength and good high-temperature impact resistance. It can effectively remove impurities in steel castings and improve the surface quality and mechanical properties of castings.
Advantages:
(1) Reduce small impurities.
(2) Reduce surface defect, improve surface quality.
(3) Reduce grinding, low down machining cost.
4. Carbon-based bonding
Developed specifically for carbon and low-alloy steel applications, the carbon-based ceramic foam filter is also ideal for large iron castings. It effectively removes macroscopic impurities from the molten metal while utilizing its large surface area to absorb microscopic inclusions, ensuring smooth filling of the molten metal. This results in cleaner castings and minimized
turbulence.
Advantages:
(1) Low bulk density, very low weight and thermal mass, resulting in a very low heat storage coefficient. This prevents initial molten metal from solidifying in the filter and facilitates rapid passage of the metal through the filter. Immediate filling of the filter helps reduce turbulence caused by inclusions and slag.
(2) Widely applicable process range, including sand, shell, and precision ceramic casting.
(3) Maximum operating temperature of 1650°C, significantly simplifying traditional pouring systems.
(4) Special three-dimensional mesh structure effectively regulates turbulent metal flow, resulting in uniform microstructure distribution in the casting.
(5) Efficiently filters smaller non-metallic impurities, improving the machinability of components.
(6) Improves the comprehensive mechanical properties of the casting, including surface hardness, tensile strength, fatigue resistance, and elongation.
(7) No negative impact on remelting of regrind containing filter material.
Features:
High porosity & large specific surface area: 80%–95% porosity, 3D interconnected pores enable efficient impurity interception in molten metal/glass.
Superior high-temperature resistance: Alumina type for 1250℃, silicon carbide up to 1500℃, zirconia over 1760℃.
High strength & thermal shock resistance: Withstands molten metal impact; resists cracking under rapid temperature changes.
Excellent filtration performance: Four mechanisms (flow straightening, screening, cake filtration, adsorption) boost molten metal purity, improving cast product quality and reducing rejection rates.
Good chemical stability: No reaction with alloy melts; no adverse impact on metal composition/performance.
Lightweight: Easy to install; lowers loads on casting equipment.
High dimensional accuracy: Meets diverse casting process requirements for stable, consistent filtration.
Low flow resistance: 3D curved pore structure ensures smooth molten material flow.
|
Models and Parameters of Alumina Ceramic Foam Filters
|
|||||
|
Item
|
Compression Strength (MPa)
|
Porosity (%)
|
Bulk Density (g/cm3)
|
Working Temperature (≤℃）
|
Applications
|
|
RBT-01
|
≥0.8
|
80-90
|
0.35-0.55
|
1200
|
Aluminium Alloy Casting
|
|
RBT-01B
|
≥0.4
|
80-90
|
0.35-0.55
|
1200
|
Large Aluminium Casting
|
|
Size and Capacity of Alumina Ceramic Foam Filters
|
||||
|
Size(mm)
|
Weight(kg)
|
Flow Rate(kg/s)
|
Weight(kg)
|
Flow Rate(kg/s)
|
|
10ppi
|
20ppi
|
|||
|
50*50*22
|
42
|
2
|
30
|
1.5
|
|
75*75*22
|
96
|
5
|
67
|
4
|
|
100*100*22
|
170
|
9
|
120
|
7
|
|
φ50*22
|
33
|
1.5
|
24
|
1.5
|
|
φ75*22
|
75
|
4
|
53
|
3
|
|
φ90*22
|
107
|
5
|
77
|
4.5
|
|
Large Size(Inch)
|
Weight(Ton) 20,30,40ppi
|
Flow Rate(kg/min)
|
||
|
7"*7"*2"
|
4.2
|
25-50
|
||
|
9"*9"*2"
|
6
|
25-75
|
||
|
10"*10"*2"
|
6.9
|
45-100
|
||
|
12"*12"*2"
|
13.5
|
90-170
|
||
|
15"*15"*2"
|
23.2
|
130-280
|
||
|
17"*17"*2"
|
34.5
|
180-370
|
||
|
20"*20"*2"
|
43.7
|
270-520
|
||
|
30"*23"*2"
|
57.3
|
360-700
|
||
|
Models and Parameters of SiC Ceramic Foam Filters
|
|||||
|
Item
|
Compression Strength (MPa)
|
Porosity (%)
|
Bulk Density (g/cm3)
|
Working Temperature (≤℃）
|
Applications
|
|
RBT-0201
|
≥1.2
|
≥80
|
0.40-0.55
|
1480
|
Ductile iron, grey iron and non-ferro alloy
|
|
RBT-0202
|
≥1.5
|
≥80
|
0.35-0.60
|
1500
|
For direct pouning and large iron castings
|
|
RBT-0203
|
≥1.8
|
≥80
|
0.47-0.55
|
1480
|
For wind turbine and large scale castings
|
|
Size and Capacity of SiC Ceramic Foam Filters
|
||||||||
|
Size(mm)
|
10ppi
|
20ppi
|
||||||
|
Weight(kg)
|
Flow Rate(kg/s)
|
Weight(kg)
|
Flow Rate(kg/s)
|
|||||
|
Grey Iron
|
Ductile Iron
|
Grey Iron
|
Ductile Iron
|
Grey Iron
|
Ductile Iron
|
Grey Iron
|
Ductile Iron
|
|
|
40*40*15
|
40
|
22
|
3.1
|
2.3
|
35
|
18
|
2.9
|
2.2
|
|
40*40*22
|
64
|
32
|
4
|
3
|
50
|
25
|
3.2
|
2.5
|
|
50*30*22
|
60
|
30
|
4
|
3
|
48
|
24
|
3.5
|
2.5
|
|
50*50*15
|
50
|
30
|
3.5
|
2.6
|
45
|
26
|
3.2
|
2.5
|
|
50*50*22
|
100
|
50
|
6
|
4
|
80
|
40
|
5
|
3
|
|
75*50*22
|
150
|
75
|
9
|
6
|
120
|
60
|
7
|
5
|
|
75*75*22
|
220
|
110
|
14
|
9
|
176
|
88
|
11
|
7
|
|
100*50*22
|
200
|
100
|
12
|
8
|
160
|
80
|
10
|
6.5
|
|
100*100*22
|
400
|
200
|
24
|
15
|
320
|
160
|
19
|
12
|
|
150*150*22
|
900
|
450
|
50
|
36
|
720
|
360
|
40
|
30
|
|
150*150*40
|
850-1000
|
650-850
|
52-65
|
54-70
|
_
|
_
|
_
|
_
|
|
300*150*40
|
1200-1500
|
1000-1300
|
75-95
|
77-100
|
_
|
_
|
_
|
_
|
|
φ50*22
|
80
|
40
|
5
|
4
|
64
|
32
|
4
|
3.2
|
|
φ60*22
|
110
|
55
|
6
|
5
|
88
|
44
|
4.8
|
4
|
|
φ75*22
|
176
|
88
|
11
|
7
|
140
|
70
|
8.8
|
5.6
|
|
φ80*22
|
200
|
100
|
12
|
8
|
160
|
80
|
9.6
|
6.4
|
|
φ90*22
|
240
|
120
|
16
|
10
|
190
|
96
|
9.6
|
8
|
|
φ100*22
|
314
|
157
|
19
|
12
|
252
|
126
|
15.2
|
9.6
|
|
φ125*25
|
400
|
220
|
28
|
18
|
320
|
176
|
22.4
|
14.4
|
|
Models and Parameters of Zirconia Ceramic Foam Filters
|
|||||
|
Item
|
Compression Strength (MPa)
|
Porosity (%)
|
Bulk Density (g/cm3)
|
Working Temperature (≤℃）
|
Applications
|
|
RBT-03
|
≥2.0
|
≥80
|
0.75-1.00
|
1700
|
For Stainless steel, Carbon steel and large size iron castings filtration
|
|
Size and Capacity of Zirconia Ceramic Foam Filters
|
|||
|
Size(mm)
|
Flow Rate(kg/s)
|
Capacity(kg)
|
|
|
Carbon Steel
|
Alloyed Steel
|
||
|
50*50*22
|
2
|
3
|
55
|
|
50*50*25
|
2
|
3
|
55
|
|
55*55*25
|
4
|
5
|
75
|
|
60*60*22
|
3
|
4
|
80
|
|
60*60*25
|
4.5
|
5.5
|
86
|
|
66*66*22
|
3.5
|
5
|
97
|
|
75*75*25
|
4.5
|
7
|
120
|
|
100*100*25
|
8
|
10.5
|
220
|
|
125*125*30
|
18
|
20
|
375
|
|
150*150*30
|
18
|
23
|
490
|
|
200*200*35
|
48
|
53
|
960
|
|
φ50*22
|
1.5
|
2.5
|
50
|
|
φ50*25
|
1.5
|
2.5
|
50
|
|
φ60*22
|
2
|
3.5
|
70
|
|
φ60*25
|
2
|
3.5
|
70
|
|
φ70*25
|
3
|
4.5
|
90
|
|
φ75*25
|
3.5
|
5.5
|
110
|
|
φ90*25
|
5
|
7.5
|
150
|
|
φ100*25
|
6.5
|
9.5
|
180
|
|
φ125*30
|
10
|
13
|
280
|
|
φ150*30
|
13
|
17
|
400
|
|
φ200*35
|
26
|
33
|
720
|
|
Models and Parameters of Carbon-based Bonding Ceramic Foam Filters
|
|||||
|
Item
|
Compression Strength (MPa)
|
Porosity (%)
|
Bulk Density (g/cm3)
|
Working Temperature (≤℃）
|
Applications
|
|
RBT-Carbon
|
≥1.0
|
≥76
|
0.4-0.55
|
1650
|
Carbon steel, low alloy steel, large iron castings.
|
|
Size of Carbon-based Bonding Ceramic Foam Filters
|
|
|
50*50*22 10/20ppi
|
φ50*22 10/20ppi
|
|
55*55*25 10/20ppi
|
φ50*25 10/20ppi
|
|
75*75*22 10/20ppi
|
φ60*25 10/20ppi
|
|
75*75*25 10/20ppi
|
φ70*25 10/20ppi
|
|
80*80*25 10/20ppi
|
φ75*25 10/20ppi
|
|
90*90*25 10/20ppi
|
φ80*25 10/20ppi
|
|
100*100*25 10/20ppi
|
φ90*25 10/20ppi
|
|
125*125*30 10/20ppi
|
φ100*25 10/20ppi
|
|
150*150*30 10/20ppi
|
φ125*30 10/20ppi
|
|
175*175*30 10/20ppi
|
φ150*30 10/20ppi
|
|
200*200*35 10/20ppi
|
φ200*35 10/20ppi
|
|
250*250*35 10/20ppi
|
φ250*35 10/20ppi
|
Ceramic foam filters are widely used in various metal casting processes and related high-temperature melt purification fields.
1. Aluminum alloy casting
This is their primary application field, covering the casting of auto parts (cylinder blocks, cylinder heads, wheel hubs), aerospace components, and rail transit aluminum profiles. They can effectively remove oxides, slag inclusions and other impurities from molten aluminum, improving the density and mechanical properties of castings.
2. Cast iron/steel casting
Applied in the production of gray iron, ductile iron, carbon steel and low alloy steel castings, such as engine blocks, machine tool beds and engineering machinery parts. They reduce the content of non-metallic inclusions in molten iron/steel, minimize casting defects like blowholes and cracks, and increase the qualified rate of finished products.
3. Non-ferrous metal casting
Suitable for filtering melts of copper alloys, magnesium alloys, zinc alloys, etc., such as manufacturing electronic and electrical enclosures, hardware accessories and die-casting mold parts. They prevent impurities from affecting product surface quality as well as electrical and thermal conductivity.
4. Other high-temperature melt treatment
Usable for the filtration and purification of high-temperature fluids like molten glass and fused ceramics. They play a role in the production of special glass and the melt purification process before ceramic sintering, enhancing the uniformity and quality of final products.
Shandong Robert New Material Co., Ltd. is located in Zibo City, Shandong Province, China, which is a refractory material production base. We are a modern enterprise that integrates the research and development, production, sales, kiln design and construction, technology, and export refractory materials. We have complete equipment, advanced technology, strong technical strength, excellent product quality, and good reputation. Our factory covers over 200 acres and an annual output of shaped refractory materials is approximately 30000 tons and unshaped refractory materials is 12000 tons.
Our main products of refractory materials include: alkaline refractory materials; aluminum silicon refractory materials; unshaped refractory materials; insulation thermal refractory materials; special refractory materials; functional refractory materials for continuous casting systems.
Frequently Asked Questions
Need help? Be sure to visit our support forums for answers to your questions!
We are a real manufacturer, our factory is specialized in producing refractory materials for more than 30 years. We promise to provide the best price, the best pre-sale and after-sale service.
For each production process, RBT has a complete QC system for chemical composition and physical properties. And we will test the goods, and the quality certificate will be shipped with the goods. If you have special requirements, we will try our best to accommodate them.
Depending on the quantity, our delivery time is different. But we promise to ship as soon as possible with guaranteed quality.
Of course, we provide free samples.
Yes, of course, you are welcome to visit RBT company and our products.
There is no limit, we can provide the best suggestion and solution according to your situation.
We have been making refractory materials for more than 30 years, we have strong technical support and rich experience, we can help customers design different kilns and provide one-stop service.
