Tips To Choose Refractory Brick for High Temperature Insulation

The process of choosing refractory high temperature bricks work is not too complicated. Though, it is something that needs to be done with care. You will need to take several factors into account before making your decision. Industrial equipment's efficiency and safety can be compromised if the wrong refractory brick is chosen as insulation.

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Important Factors to Consider Refractory Bricks

Here are some important factors to consider: Browse some essential tips when you choose high temperature refractory bricks, just know when you are going to buy them. Those are the most important factors to consider when you're constructing a kiln.

Kinds of brick

You should start by discussing this with the manufacturer or supplier to find out about the different types. Most manufacturers will provide some basic information about their products. Ask for technical information on how long each type of fire brick is expected to last and details on glaze quality, so that you are not misled. You can then decide what type is best for your project and which has the best value for money. It is always better to choose insulating refractory bricks.

Firing temperature

If you are not sure what your firing temperature will be, you should discuss this with your supplier. The ideal type of insulating firebrick will be one that is designed for the right type of firing temperature.

Clinker content

This is another important factor because the clinker content of bricks can vary considerably from one type to another. A brick with a low clinker content means that it has been fired at lower temperatures. This type is less likely to break or crack and will have a longer life.

Glaze quality

The glaze on bricks can also vary in quality, depending on the manufacturer. Some bricks have an inner layer of glaze that can crack or flake off when the brick is fired. The material used for this inner layer of glaze should be as pure as possible so that it will be stronger and not disintegrate over time due to oxidation.

Strength and durability

Some types of bricks are more durable than others, which can affect their strength and longevity in your furnace. Different types are available depending on the furnace manufacturer, so you should contact them directly to find out which option will suit your needs the best.

Cost

It is important to review the cost of the brick that you have chosen and compare it with the type of brick you are considering. You should also consider factors such as delivery and installation costs as well as any installation requirements.

Length and width of bricks

The length and width of bricks can vary, which can affect your installation plans. If you are not sure which length and width are best for your furnace, ask your supplier for advice. You may need to add a mortar joint to ensure that each brick fits properly in your furnace. This adds an extra layer of protection but will mean losing some insulation effectiveness. It is a quick calculation to make when deciding on the best fiber refractory insulator.

Conclusion

You should take into account several factors while choosing bricks. These include firing temperature, the type of glaze on the bricks, and the types of glaze. Some types have better properties than others and can be used for a longer time.

Use refractory plastics or low cement castables in different areas of the heating furnace roof? The temperature of the heating furnace varies greatly from the preheating section, heating section, and soaking section, and each part has different functions. When choosing plastic refractory or low-cement castables, the use performance and price factors must be considered, as well as the convenience of construction and the storage of products.

Refractory plastic can not damage its packaging before construction. If the packaging material is damaged, the plastic can lose its plasticity. When storing and keeping the plastic, pay attention to the integrity of the plastic packaging.

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If low cement castables are used, anchors must be welded. If the plastic material is fixed on the furnace roof by anchoring bricks, the tightness of the plastic material and the anchoring brick affect the quality of the plastic furnace roof.

Ramming around the anchor is very important when the fire-resistant plastic is constructed. Make wooden molds based on the shape of anchor bricks. When the plastic is rammed, a wooden mold is used to mold the plastic around the anchor bricks, and then the anchor bricks are inlaid in the mold. Pram around the anchor brick with the wind to make it come in close contact with the plastic. But be careful not to smash the anchor brick.

But plastic is more shrinking. After removing the mold, use an expansion joint knife to cut a 30-50mm expansion suture on the surface with an interval of about 1.5m, which means that the plastic surface is cut into 1.5m square blocks. But if the plastic shrinks, it will only crack in the opened expansion joint, and no cracks or cracks will appear.

If low cement castables are used, 20 anchors per square must be welded. Support the mold first, then pour the low-cement castable, take off the film after 24 hours, and then grill according to the barbecue system.

In short, whether fire-resistant plastic or low-cement castable is used, depends on the situation. If there is no condition to store plastics, low cement castables can be used. If the construction of low cement castables is inconvenient, refractory plastics can also be used.

How Long is the Setting Time of the Refractory Plastic?

Refractory plastic is an amorphous material that can maintain good plasticity for a long time. Next, we come to understand some characteristics of the refractory plastic from the setting time of the refractory plastic.

The refractory plastic can be in the form of a mud paste, or it can be separated from the powder and the binder. If you are in a hurry for construction or repair, it can be made into a mud paste. If the construction time is long, the powder and the binder can be packaged separately, so that they can be mixed and used during pre-construction.

The plasticity of the plastic has a great influence on the bonding strength and volume stability of its hardened body. It is the properties of clay that control the properties of refractory plastics. The plasticity is related to the properties and dosage of the clay, which increases with the increase of the binding dosage. If the binding dosage is too high, the fire resistance and plasticity are not strong, and it is best to control it at 5%-10% so that the plasticity of the plastics will not decrease during the shelf life. The binding agent is a special glue preparation.

The refractory plastic can be taken out from a sealed container during construction, or a special bonding agent can be added on-site to trap the material. The trapping time cannot be less than 10 hours. Then lay it between the hanging bricks or anchoring bricks and tamping with a hammer. In particular, the plastic can be processed into any shape before being hardened.

Refractory plastic In order to facilitate the drainage of water, holes should be punched at regular intervals. Expansion joints should also be set according to the design. If the part to be constructed is integral, first construct on the bottom form and then hoist it after drying.

The setting time of refractory plastic is 1-3 hours for the initial setting and 6-8 hours for the middle setting. It can reach 60-80% strength after one day of curing, 85%-95% of the strength is reached after 3 days of curing, and it can be used after 7 days of final strength.

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