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Conductive Ceramics With High Temperature, Wear Resistance
Aug 08, 2017

First, Conductive Ceramics for filtration and separation of materials

It is widely used in the purification of water, the separation and filtration of oil, and the organic solution, acid-base solution, viscous liquid, compressed air, compressed air and so on. It has the advantages of large filter area and high filtration efficiency. It is widely used in the purification of water, , Coke oven gas, methane, acetylene and other separation and filtration.

In addition, Conductive Ceramics with high temperature, wear resistance, chemical resistance, etc., in high temperature fluid, molten metal, corrosive fluid, radioactive fluid filtration separation, showing a unique advantage.

1 for the filtration of molten metal

In the foundry industry, foam ceramic filters are often used to remove non-metallic impurities from molten metal. As a molten metal filter, its service conditions are very harsh, requiring porous ceramic not only have sufficient strength and good thermal shock resistance, but also have anti-metal scouring ability, and does not react with the filter metal from high temperature.

Filter material:

Usually multi-component metal oxide, containing silicate, mullite, coca baculite, silicon carbide, zirconia, alumina, silicon nitride, etc., with these raw materials into two or three layers of filtration system. Can be used to filter iron alloy, stainless steel, aluminum, iron, copper, bronze, steel, zinc and so on.

2 for hot (high temperature) gas filtration

High temperature dust removal technology is a core technology in the field of energy use and environmental protection to achieve energy efficient use and low pollution emissions. High temperature gas dry dust removal technology requires direct dry gas removal and purification under high temperature conditions to maximize the use of the physical sensible heat of the gas, improve energy efficiency, save water at the same time, save water resources and avoid Wet water dust caused by secondary water pollution

Dry dust removal technology overview:

According to the dust removal mechanism, high temperature gas dry dust removal technology can be divided into inertial dust removal, electrostatic dust and filter dust. The electrostatic precipitator is suitable for high temperature gas dust removal, but the electrode life is short, the material stability is poor, the dust removal efficiency is affected by the specific resistance of the dust; the ordinary fiber bag filter dust collector, despite the dust removal High efficiency, but poor high temperature resistance.

Porous ceramic material dust removal features:

The industrial waste gas-based dust exhaust gas temperature is high, corrosive, the filter material has a high demand. Porous ceramic materials are being developed and applied. With the advantages of high temperature resistance, corrosion resistance, abrasion resistance, light weight, low price, high dust removal efficiency (up to 99%) and long service life, it has become a filter dry method One of the main material options for the dust removal device.

High temperature ceramic filter material type:

1) oxide ceramic materials such as alumina / mullite, cordierite, zirconia and the like;

2) non-oxide ceramic materials, such as reaction with silicon carbide, bonded silicon carbide, hot-pressed silicon nitride, hydroxyapatite and so on.

Examples of applications:

The key material of the diesel cleaning and discharging system is pure SiC honeycomb ceramic material, which can meet the Euro Ⅳ and Euro Ⅴ emission standards. It can remove more than 96.5 particles in automobile exhaust emission, including fine particles. So that the standard car exhaust emissions to Euro Ⅳ above the standard, but also widely used in other areas, such as waste gas, waste tobacco environmental treatment.

working principle:

The particle trap uses a honeycomb structure with separate open and congested passages at both ends. The waste enters from the open section through the porous honeycomb wall and is then discharged from the adjacent passage. Soot particles due to too large, can not cross the wall hole, because it is collected in the channel wall, and will not be discharged into the air. The trap will be regenerated and heated regularly to eliminate soot and keep it clean.

In addition, porous ceramic can be used in addition to high temperature gas dust filter, can also be used for pharmaceutical, brewing industry sterile air purification. For example: the use of ceramic filters with a diameter of 20μm can be pharmaceutical, beer and other brewing industry fermentation with sterile air treatment.

3 used in water quality sewage treatment

Industrial sewage, sewage and other serious pollution of water resources in some areas due to water pollution caused by lack of drinking water resources, and even industrial water quality can not be guaranteed to solve the problem of water purification, improve water treatment efficiency, has become urgent.

Conductive Ceramics because of its material reasons than the organic material has better adsorption and biological affinity, used as a sewage treatment filter with high efficiency, but also a large quality, poor processing and other shortcomings. Superior performance of Conductive Ceramics are often more expensive, so Conductive Ceramics for wastewater treatment commonly used also need to develop cheap and efficient sewage treatment carrier media, improve the reuse of materials and so on. Despite this, environmental protection winds of a place of chicken feathers, Conductive Ceramics or usher in the opportunity.

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