Ceramic Filter

The normal brushing times of the ceramic filter element are 20-28 times. The ceramic filter element is evenly coated with silver ions and antibacterial active ingredients. It has antibacterial and antiseptic effects. It can effectively remove bacteria, fine particles, impurities and viruses in the water. Purification of water and mineral water, sterilization and preparation of sterile water, disinfection water, high-purity water in the pharmaceutical and electronic industries, chemical industry and other wading industries. Generally, it can be used for 10-12 months, and a good ceramic filter can be used for 3-5 years, or even longer.
The ceramic filter element can be cleaned repeatedly and easily replaced. With the water outlet of the core facing up, scrub the surface of the filter element with sandpaper (or scouring pad) under running tap water, wipe off the contaminants on the surface of the filter element to expose a new surface, and rinse it.

Ceramic alone is a powerful filter and handily removes many contaminants. The extent of the filtration varies and will depend on what additional filtration media the ceramic candle contains. The main categories of contaminants that basic ceramic filters remove are bacteria, sediment, and turbidity.
• Bacteria: Ceramic filters are quite effective at removing bacteria from water. Few bacteria are smaller than one micron in size. Unable to pass through the pores, the bacteria are filtered out as the water seeps through the ceramic filter. Ceramic filters rid water of about 99% of pathogenic bacteria, including E. coli, shigella, and salmonella. Microbial cysts, such as Giardia and Cryptosporidium, are also too large to pass through the filters and are easily removed by the ceramic shell. The silver ion impregnation makes ceramic filtration especially advantageous to those with microbiologically unsafe drinking water. Silver ions are toxic to bacteria, further nullifying bacterial contaminants and preserving the cleanliness of the filter’s surface.
• Sediment: Particulate matter like dirt, debris, and rust is effectively filtered out by the ceramic filter’s porous surface.
• Turbidity: Turbidity is cloudiness caused by suspended particles in the water. This turns your water unappetizing shades of yellow and brown. Ceramic filters adeptly remove the murky coloration from water and restore its clarity.
• Chlorine (if filter contains activated carbon): Chlorine is present in most city water because it is used in the municipal purification process. Chlorine leaves water with a bitter chemically taste and an unpleasant smell. The activated carbon reduces both chlorine and chloramines in water, restoring your water’s fresh flavor.
• VOCs (if filter contains activated carbon): Volatile organic compounds, or VOCs, include a wide array of chemical contaminants that make their way into water by way of everything from agricultural runoff to consumer products like paints and pesticides. These compounds are all carbon-based, and ceramic filters with carbon cores will greatly reduce the levels of VOCs in your water.
• Heavy Metals (if filter contains ion exchange resin): If the ceramic element contains an ion exchange resin, heavy metals like lead, mercury, copper, and zinc are greatly reduced in the water.

Selecting the sponge
First, a polymeric sponge must be selected with suitable properties. The pore size of the sponge determines the pore size of the final ceramic after firing. It must also be able to recover its original shape and convert into a gas at a temperature below that required to fire the ceramic. Polymers that can satisfy these requirements include polyurethane, cellulose, polyvinyl chloride, polystyrene, and latex. Typical polymeric sponges range in size from 3.94-39.4 in (10-100 cm) in width and 0.394-3.94 in (1-10 cm) in thickness.
Preparing the slurry
After the sponge is selected, the slurry is made by mixing the ceramic powder and additives in water. The ceramic powder usually consists of particles less than 45 microns in size. The amount of water can range from 10-40% of the total slurry weight.
Immersing the sponge
Before immersion, the sponge is usually compressed to remove air, sometimes using a mechanical plunger several times. Once it is immersed in the slurry, the sponge is allowed to expand and the slurry fills the open cells. The compression/expansion step may be repeated to achieve the desired density.
Removing excess slurry
After infiltration, between 25-75% of the slurry must be removed from the sponge. This is done by compressing the sponge between wooden boards, centrifuging, or passing through preset rollers. The gap between rollers determines the amount removed. Sometimes the impregnated foam goes through another shaping step since it is still flexible.
Drying
The infiltrated sponge is then dried using one of several methods—air drying, oven drying, or microwave heating. Air drying takes from eight to 24 hours. Oven drying takes place between 212-1,292° F (100-700° C) and is completed in 15 minutes to six hours.
Burning out the sponge
Another heating step is required to drive off the organics from the slurry and burn out the sponge. This takes place in air or inert atmosphere between 662-1,472° F (350-800° C) for 15 minutes to six hours at a slow and controlled heating rate to avoid blowing apart the ceramic structure. The temperature depends on the temperature at which the sponge material decomposes.
Firing the ceramic
The ceramic structure must be heated to temperatures between 1,832-3,092° F (1,000-1,700° C) to densify the material at a controlled rate to avoid damage. The firing cycle depends on the specific ceramic composition and the desired final properties. For instance, an aluminum oxide material may require firing at 2,462° F (1,350° C) for five hours.