Ceramic Foam Filter For Foundry
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Specifications
1.High porosity, low loss of thermal shock, high mechanical strength.
2.Pore density PPI:10-40
Ceramic Foam Filter
1. Introduction:
Foam Ceramic are mainly used for filtration of aluminium and aluminium alloys in foundries and cast houses . With their excellent thermal shock resistance and corrosion resistance from molten aluminum, they can effectively eliminate inclusions, reduce trapped gas and provide laminar flow, and then the filtered metal is significantly cleaner. Cleaner metal results in higher-quality castings, less scrap, and fewer inclusion defects, all of which contribute to bottom-line profit.
SIC Ceramic Foam filters are just developed as a new type molten metal filter to decrease casting flaw in recent years. With its characteristics of light-weight, high mechanical strength, large specific surface areas, high porosity, excellent thermal shock resistance, erode resistance, high-performance,SIC Ceramic Foam filter is designed for filtering impurities from molten Iron & Alloy, nodular cast iron castings, grey iron castings and malleable castings, Bronze casting, etc.
2. Size available:
7", 9", 12", 15", 17", 20", and 23", with porosities from PPI 10 to PPI 60(PPI ie pores per inch).
Other special sizes could be produced on request.
3. Material Specifications
4.1 SIC Physical Properties:
Porosity(%) | 80~90% |
Working Temperature | ≤1500°C |
Bending Strength(Mpa) | 0.8 |
Compression Strength(Mpa) | 0.9 |
Thermal Shock Resistance | 1100°C---room temperature 6 times |
Volume Density | 0.4-0.5g/cm3 |
4.2 Alumina Physical Properties:
Working | ≤1200°C |
Porosity | 80~90% |
Compression Strength | ≥1.0Mpa |
Volume Density | ≤0.5g/cm3 |
Thermal Shock Resistance | 800°C---Indoor temperature 5 times |
Application | non-ferrous and alumina alloys, |
5. Pouring Rate and Filtration Capacity
1) Alumina Ceramic Foam Filters
Dimensions(mm) | Dimensions(inch) | Pouring Rate(kg/s) | Filtration Capacity(ton) |
178x178x50 | 7x7x2 | 0.2-0.6 | 5 |
228x228x50 | 9x9x2 | 0.3-1.0 | 10 |
305x305x50 | 12x12x2 | 0.8-2.5 | 15 |
381x381x50 | 15x15x2 | 2.2-4.5 | 25 |
430x430x50 | 17x17x2 | 3.0-5.5 | 35 |
508x508x50 | 20x20x2 | 4.0-6.5 | 45 |
585x585x50 | 23x23x2 | 5.0-8.6 | 60 |
2) Zirconia Ceramic Foam Filters
Dimensions(mm) | Pouring Rate(kg/s) | Filtration Capacity(kg) |
50x50x22 | 3-5 | 30 |
50x75x22 | 4-6 | 40 |
75x75x22 | 7-12 | 60 |
75x100x22 | 8-15 | 80 |
100x100x22 | 14-20 | 100 |
D50x22 | 2-6 | 18 |
D80x22 | 6-10 | 50 |
D90x22 | 8-16 | 70 |
3) Silicon Carbide Ceramic Foam Filters
Dimensions (mm) | Pouring Rate(kg/s) | Filtration Capacity(ton) | ||
Grey Iron | Ductile Iron | Grey Iron | Ductile Iron | |
40x40x22 | 4 | 3 | 65 | 32 |
50x50x22 | 6 | 4 | 100 | 52 |
75x50x22 | 9 | 6 | 150 | 75 |
75x75x22 | 14 | 9 | 220 | 100 |
100x50x22 | 12 | 8 | 200 | 100 |
100x75x22 | 18 | 12 | 300 | 150 |
100x100x22 | 25 | 16 | 400 | 200 |
150x150x22 | 50 | 36 | 900 | 450 |
- Q:Ceramic filter cleaning, sulfuric acid cleaning
- Ceramic filter medium is ceramic, ceramic generally resistant to strong acid, alkali, cleaning, it is best to use nitric acid, hydrochloric acid next, not recommended to use sulfuric acid.
- Q:What are the reasons for the program alarm of ceramic filter?
- If you say "lean" is the ceramic filter suction when the ceramic filter plate into a cake of thin, high water content, is the ceramic filter for their own reasons, can from the following aspects: the investigation considering this phenomenon is always so recently or just happened, if you have been so, probably because your selection is not suitable for pulp the ceramic filter (such as mud content, fine grain size, ceramic filter plate selection such as inconsistent or unqualified ceramic filter). If this anomaly has occurred recently, it is possible to change the ore condition, and the operation parameters of ceramic filters or the cleaning are not up to standard. You can check the vacuum system (vacuum generally ranges from -0.09 to -0.075MPa), backwashing system (generally refers to the filtered water recoil 0.07 ~ 0.12MPa), acid (HNO3 system standards), ultrasonic system is normal.
- Q:Working principle, ultrasonic trouble and troubleshooting of ceramic filter
- The shape and mechanism of the ceramic filter are similar to those of the disc vacuum filter, but the filter media are different. The filter medium of ceramic filter is the ceramic filter plate, it can produce the micro capillary effect and capillary force in micropores is higher than the general vacuum applied force, so that the pores keep full of liquid state, so no matter what the circumstances, the air does not pass through the ceramic filter plate, so that the ceramic filter solid-liquid separation of low energy consumption, and high vacuum.
- Q:What is the reason that ceramic filter does not absorb mineral powder?
- One is leakage, two is no liquid output or output weakness, pressure is too low, cleaning effect is not good, the pressure is too large, will cause damage to the filter plate and reduce the slurry concentration. The recoil pressure is regulated by the pump loop valve and the pressure regulating valve.
- Q:What is the working pressure of the ceramic filter?
- The backwash pressure is the size of the backwash of the ceramic filter during recoil stage, and the recoil pressure is generally less than 0.12MPa. The greater the pressure, the better the recoil effect, the better the service life and the suction effect of the ceramic filter plate, and the worse the service life and the suction effect of the ceramic filter board. The backwash pressure of the ceramic filter shall be no less than 0.07MPa.
- Q:Influence factors of ceramic filter
- (1) the particle size and the distribution of the material match the microporous of the ceramic filter plate. Although the ceramic filter plate aperture is bigger, easy to suck the pulp, but easy to cause the ceramic filter board to block up.(2) the ceramic filter plate with the same ceramic filter plate with high pore permeability and high water permeability is selected with high water permeability and good slurry absorption performance. The spindle speed is slow, the formation time of growth in the area of vacuum filter cake, production capacity increased gradually, but because the unit time of grout thickness and spindle speed slow is proportional to, so the ceramic filter capacity in a range of showing the highest.
- Q:The vacuum degree of the ceramic filter is normal and the cake water is large?
- There is a difference between the vacuum display and the actual vacuumThe main speed of the ceramic filter is too fastThe water content of the filter cake is gradually increased within 0~8 hours after the equipment has been continuously turned onThe ceramic filter plate does not meet the aperture range and the opening rate is lowThe ceramic filter plate has a near life and serious blockageCeramic filter cleaning standards (acid, ultrasonic, backwash water)The scraper can not be completely discharged, and the surface of the ceramic plate is coated with a thin filter cakeFailure to manufacture equipment or other causes of failure
- Q:What's the reason for high water content in filtration copper concentrate?
- Can the cleaning of ceramic plate meet the requirement?Such as cleaning of ceramic plate is not up to the requirements, plugging holes will increase the risk of ceramic plate, ceramic plate plug serious suction effect will become worse (filter cake moisture content increased, cake thickness reduction), cleaning of ceramic plate refers to washing and cleaning.Backwash to ensure that the water filter filter water pressure in the 0.1MPa or so, at least not less than 0.07MPa or less, it is necessary to consider before the filter water pressure is low or water filter element needs to be replaced.Joint cleaning to ensure that the ultrasonic can be no trouble, every time cleaning the amount of nitric acid up to standard. If the filtration effect is not ideal, the cleaning cycle can be washed from 45--60 every 8 hours, changed to 6--7 hours and cleaned for more than 1 hours.
- Q:The efficiency of ceramic filter is low. What's wrong with it?
- Ceramic filter is a new and efficient dehydration equipment. If users find the ceramic filter board surface suction effect is poor, or even do not suck slurry, we should promptly investigate the causes, so as not to affect production efficiency.
- Q:Common troubles of ceramic filter
- (1) low vacuum, can not meet the production requirements. The main reason is the vacuum pipeline leakage, vacuum pump circulating water is not enough, vacuum pump impeller wear and tear, distribution head wear, ceramic filter plate damage, filtrate tank drainage valve is not closed, pulp trough material level is lower;(2) low or fluctuating backwash water pressure. The main reason is the blockage or leakage of the backwash water pipe system and the distribution of head wear;(3) the liquid level of the filtrate tank is high. The main reason is that the circulating water pump impeller or pump shell wear, pressure is insufficient, so that the drain valve can not open or drain valve itself failure, and filter barrels and circulating water pipe between the leakage;
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