Casting Ceramic Foam Filter For Liquid Filter

Casting Ceramic Foam Filter For Liquid Filter System 1

Casting Ceramic Foam Filter For Liquid Filter

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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:Does the ceramic factory use hydrochloric acid?: Ceramic filter comes with a combined cleaning system, usually to ensure backwashing normal, combined cleaning (nitric acid + ultrasonic + backwash) in place.

Q:Why should filter core be used in backwash of ceramic filter?: Ceramic filter recoil stage is with certain pressure of clean water from the inside out washing ceramic filter plate, the outer aperture ceramic filter plate from inside is gradually reduced, such as flushing water and unclean inside contain impurities that may block ceramic filter board, other structures in the recoil stage of pollution. Such as recoil, water is not clean, you must go through the water filter cartridge to filter again, the choice of filter core, the higher the accuracy of filtration, the more clean water, but the filter is more likely to plug, scrap. Of course, the water is clean and contains little solids. The filter core is not easy to plug and even water filters can be removed.

Q:Ceramic filter in vacuum pressure enough, the ceramic plate does not suck pulp, what is the reason for analysis?: The filtrate is not discharged smoothly.The filtrate can not be discharged in a timely and smooth manner, the new filtrate can not be sucked out, and the filtrate can not be continuously sucked out, so that the filter cake can not be adsorbed on the ceramic plate.

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:What are the poor filtration effects of vacuum disc filters?: Under normal circumstances, high vacuum, vacuum suction, high production capacity, filter cake moisture control is good. At present, some ceramic filters are equipped with two or multi-stage vacuum system to obtain almost absolute vacuum, and can reach 0.09 ~ 0.098MPa.

Q:Can the plate filter press pass through the filter plate?: Specific, it is necessary to choose the filter characteristics according to different materials. Plate and frame filter press: plate and frame filter press is an industrial realization of solid, liquid separation, plate and frame filter press is suspension, liquid-solid, liquid two phase, applied to chemical, ceramics, oil

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 to determine the quality of ceramic fiber filter board simply?: Ceramic fiber board quality can be judged from the following aspects:1, appearance. The surface is flat and the cutting surface is well arranged, and vice versa.2 density. Press the hands, and the surface is soft and smooth.3, process. Vacuum suction and continuous production process.4, cross section, slag ball content is low.

Q:How should the static and dynamic sealing points of the ceramic filter be leaking?: The filtrate pump works to drain or recycle the water that has been pumped out. 6 、 cleaning system work, cleaning system includes backwashing (water pump pressure or height difference pressure), acid liquid (metering pump, automatic acid injection), ultrasonic (ultrasonic work), etc.. 7 、 control system and other electrical systems. In addition, the filter cake which is absorbed and dried on the ceramic filter plate is unloaded automatically by the scraper and then falls on the belt conveyor, and is conveyed to the concentrate storage yard by a belt conveyor.

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.

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