What is a ceramic foam filter used for?

Overview

Pyropore ceramic foam filters (CFFs) are high-quality filters used in molten aluminium, copper-based alloys and ferrous metals including grey, ductile and steel alloys. Pyropore CFFs are efficiently remove oxides and non-metallic particles. 

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Pyrotek Offerings

Pyrotek's Pyropore ceramic foam filters are proven, high-quality filters which provide ultimate molten aluminium filtration. Constructed of high-strength ceramics, Pyropore provides a superior metal filtration. Ceramic foam filters are easily installed and provide an excellent solution for the removal of oxides. 

There are four different types of Pyropore ceramic foam filters:

• Partially stabilized zirconia (ZrO2) ceramic filters
• Silicon carbide (SiC) filters
• Aluminium oxide (Al2O3) filters
• Aluminium oxide with graphite

Ceramic foam filters can be used in many processes, including: 

• Sand casting
• Investment casting
• Shell casting
• Low-pressure casting
• Permanent mould casting
• Holding and transfer systems

Ceramic foam filter is a material widely used in filtration, separation, and purification. Its excellent performance and wide range of applications have gradually attracted attention.

The manufacturing process, performance fields, advantage comparison, use and maintenance, and development trends of alumina ceramic foam filters.

1. Introduction

A ceramic foam filter is a three-dimensional porous structure ceramic material with high air permeability, high corrosion resistance, high heat resistance, and high mechanical strength. It is mainly used in liquid-solid and gas-solid separation fields, such as water treatment, Filtration, separation, and decomposition in chemical protection, social security, pharmaceutical, and other industries.

2. Manufacturing process

The main steps in the manufacturing process of foam ceramic starboard

(1) Preparation of ceramic slurry: Mix ceramic raw materials according to a certain proportion, and add dispersants, binders, and other additives to prepare ceramic slurry.

(2) Preparation of foam ceramics: Inject the ceramic slurry into foam plastic or metal molds, dry, and harden to form foam ceramics.

(3) Sintering: The hardened foam ceramics are sintered at high temperatures to obtain stable physical and chemical properties.

(4) Surface treatment: Surface treatment is performed on the sintered foam ceramics, such as cleaning and polishing. To remove surface impurities and defects.

The following points should be noted during the manufacturing process: 

(1) The formula and preparation process of ceramic slurry directly affect the structure and performance of foam ceramic plate, which needs precise control.

(2) During the production process of foam ceramics, the uniformity and consistency of slurry injection must be ensured to avoid defects such as blind holes and cracks.

(3) Temperature and time during the sintering process are key factors affecting the performance of foam ceramic filter plates and need to be scientifically and reasonably controlled.

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(4) Surface treatment is an important step in improving the service life and performance of foam ceramic filter plates.

3. Performance characteristics

Foam ceramic filter plates have the following performance features and advantages:

(1) High air permeability: The foam ceramic filter plate has excellent air permeability, which can ensure the smooth passage of gas and liquid.

(2) High corrosion resistance: The foam ceramic filter plate has good corrosion resistance and can withstand the erosion of various chemical substances.

(3) High heat resistance: The foam ceramic filter plate has high mechanical strength and can withstand a certain amount of pressure and impact.

(5) Easy to replace and clean: The foam ceramic filter plate can be easily replaced and cleaned, which improves usage efficiency and reduces maintenance costs.

 

4. Application fields

Ceramic foam filters are used in the following areas:

(1) Water treatment

 (2)Chemical industry

(3) Environmental protection field

(4) Metallurgical field: In the metallurgical industry, it is used for slag removal, impurity removal, and solid-liquid separation of metal liquids (the most important thing is what I want to talk about today)

(5) Pharmaceutical sector

 

5. Use and maintenance

When using ceramic foam filters, you need to pay attention: Before installation, you should carefully check the appearance of the filter plate for defects, such as cracks, holes, etc. At the same time, check whether the installation is firm and whether the seal is tight. If problems are found, the filter plate should be processed and replaced in time. Before using the filter plate, it is necessary to preheat it to a reasonable range, otherwise, the service life of the filter plate will be reduced.

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