Acid Proof Brick

  • Tuesday, 21 February 2023
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Acid Proof Brick

Acid proof brick is a kind of refractory material used for protection against various acids and alkalis. It is made from a variety of inorganic and non-metallic mineral products after crushing, grinding, classifying, removing and pressing and then firing at high temperature. The brick has good acid resistance, low apparent porosity, compact structure and controllable size.

The application of acid proof brick is widely used in chemical industry, including workshop, outdoor acid resistant floors, anti corrosion lining of tower, tank and sink etc. It has the function of high acid resistance, low water absorption and can be shaped according to different furnaces/kilns.

Fireclay type acid proof brick is available in two grades, class I and class II. They have excellent chemical and abrasion resistance, as well as high strength and low porosity, which makes them suitable for vessel linings, chimneys and pits. They can also be set with Acidcas acid resistant cement to provide a complete system of ceramic linings.

They are used in industries that deal with corrosive liquids such as sulfuric acid, hydrochloric acid and many other strong acids. Moreover, they are also applied as inner linings for anticorrosive pools, channels and various reactors and towers in chemical fertilizer plants, sulfuric acid plants and many other chemical plants.

Red shale brick is an alternative to fireclay acid proof brick and has the advantage of being very tough, as it contains iron which provides high strength and resists abrasion. It is therefore recommended for applications where thermal shock is not a factor and minimum absorption is required, although it will leach out some of its integral iron if it is exposed to very acidic environments.

This is why it is necessary to use a suitable lining system. The lining systems that are available can be very effective at protecting concrete from acid attack, but they have some drawbacks such as their need for careful surface preparation and curing.

Another important disadvantage of lining systems is the fact that they can become pinholed or irregular in their formation due to seam or joint irregularities and the variations in the concrete's thickness. The combination of these problems can cause the lining system to fail.

To combat this, a silicate based material is now being used to line the surfaces of equipment and other structures that are susceptible to corrosive chemicals. The silicate material is inserted into the concrete before it is cast, ensuring that it will not come under attack. Then, when the structure is cured it will be ready to operate.

The silicate based product is not only a great way to protect concrete from corrosion, but it is also extremely cost-effective and simple to install. Its advantages include:

The lining system is designed to be as flexible as possible and to work with any other elements of the structure such as pipework, pumps, valves, etc. In addition, the lining system should be designed to work in conjunction with other structures that are vulnerable to acid corrosion, such as foundations, walls and floor surfaces. This will help to prevent damage to the other materials in the system, and reduce the overall maintenance costs associated with a corrosive environment.

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