Ceramic Filter Plate for Casting Ceramic Foam Filter for Liquid Filter

Ceramic Filter Plate for Casting Ceramic Foam Filter for Liquid Filter System 1

Ceramic Filter Plate for Casting Ceramic Foam Filter for Liquid Filter

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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.

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

Material	ZrO2	SiC	Al2O3
Colour	Yellow	Grey Black	white
Pore density (ppi)	10~60	10~60	10~60
Porosity (%)	80~90	80~90	80~90
Operating temperature(°C)	1700	1500	1100
Compression Strength(MPa)	1.2	0.9	0.8
Density(g/cm3)	0.90-1.50	0.35-0.50	0.30-0.45
Thermal Shock Resistance(1100-20°C)	>6 times	>6 times	>6 times
Application	steel	iron	Non-Ferrous Alloy and Aluminium

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 (Indoor Temperature)	≥1.0Mpa
Volume Density	≤0.5g/cm3
Thermal Shock Resistance	800°C---Indoor temperature 5 times
Application	non-ferrous and alumina alloys, high temperature gasfilter, chemical fillings and catalysis carrier

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

Casting Ceramic Foam Filter For Liquid Filter

Q: The ceramic filter suddenly did not smoke, and later he was all right. What's the reason?: The size of ceramic filter is generally on both sides of the vacuum tank, such as 50 square meters with 5 square meters of ceramic filter / ring ceramic filter plate combination (possible), there are 10 discs, the ceramic plate left a vacuum tank on the left of the 5 disc for filtration, vacuum filtration tank for the ceramic plate on the right right of the 5 disc. If a vacuum system temporarily fails, it may cause poor suction, no suction, and a normal operation at the other end.

Q: Is the filter plate of the ceramic filter afraid of freezing?: The ceramic filter plate by table and the distribution of a large number of porous capillary ceramic filter, when working in the water slurry channel is used so the microporous ceramic filter plate internal residual has a lot of water, such as low temperature, the inside of the frozen water volume will swell, causing damage to the ceramic the inside of the microporous filter plate structure.

Q: What are the materials that make up the ceramic mold?: From the development trend of rice, the development of ceramic membrane preparation technology mainly in the following 2 aspects: one is the porous membrane research, to further improve the already commercialized inorganic ultrafiltration and microfiltration membrane, nanofiltration membrane with molecular sieve, the development function of gas separation membrane and pervaporation membrane: two in dense membrane research solid electrolyte membrane, ultra-thin metal and its alloy film and ion conduction ability is research hotspot. The commercial porous membranes are mainly ultrafiltration and microfiltration membranes, and their preparation methods are mainly particle sintering and sol-gel. The former is mainly used for making microporous filter membranes, and commercial A1203 films are prepared by particle sintering method.

Q: The efficiency of ceramic filter is low. What's wrong with it?: CleanThe cleaning of ceramic filter is divided into two parts: reverse flush cleaning (also useful gas) and combined cleaning. The purpose of cleaning is to discharge the particles from the hole to the ceramic filter board.Anti flushing and cleaning water filter after direct visual pressure can, generally between 0.08--0.12MPa, such as less than 0.05MPa, while the poor flushing effect without even washing effect, resulting in blocking accumulation eventually led to the ceramic filter plate hole plugging scrap. Replacing the filter element in time and ensuring the water pressure before filtration can provide stable backwashing water pressure.Combined cleaning by ultrasonic vibration, nitrate dissolution method for maximum remove blockage of backwash rushed out, the general ceramic filter every 8 hours of continuous work should stop cleaning 1 hours, such as the use of the old plate or the suction effect is poor, can strengthen cleaning (such as shorten the cleaning period, prolong the period of cleaning, increase the amount of nitric acid etc.).

Q: The vacuum degree of the ceramic filter is normal and the cake water is large: The concentration, particle size and mud content of the raw materials are not suitable for or due to changes, which are no longer suitable for dehydration using ceramic filters

Q: How much is the accuracy of 50nm ceramic membrane filtration?: It should be noted that due to wear, plugging and so on, the new and different degrees of ceramic film, the pore size will change. Micron scale ceramic membrane filtration accuracy is very good, nano scale aperture range of such a small ceramic film does not know in what way.

Q: The vacuum degree of the ceramic filter is normal and the cake water is large?: The vacuum degree of the ceramic filter is normal at about -0.08MPa. Under normal circumstances, the water content of the filter cake treated with a ceramic filter is about 10%, and the moisture content of the tail filter cake is about 15%. The water content of the filter cake increases with the increase of water content in the ceramic filter.

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: What is the backwashing pressure of the ceramic filter?: Ceramic filter is a kind of solid-liquid separation, dehydration drying equipment, such as dehydration pulp, mortar. The backwash of ceramic filter is to flush the filter medium (ceramic filter plate) with clean water with a certain pressure.

Q: What about the leakage of the ceramic filter static and dynamic sealing points?: When the main shaft is rotated, the filter cake is adsorbed on the surface of the ceramic filter plate and dehydrated by the vacuum generated by the vacuum pump.

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