How to use and use refractory castable

How to use castable:

1. When pouring ladles, the quality of the ladle and the number of load-bearing times should be tested many times, whether it is the crane high-temperature castable ladle or the portable ladle, it should be checked once every 2 months, and the important parts should be checked for cracks, deformation, expansion and so on.

2. Mix the castable with a mixer, pour the castable into the stirring first, and add the coagulation dose of 5-3%. Depending on the hardening time to adjust, the temperature at 25 o'clock in autumn can be increased by 5%, if the temperature of the construction site is at 30, 3% can be added, and the time must be grasped to reduce the loss during construction, and the pouring must be poured to the specified part until completion.

3. The actual operation of the castable is mainly stirred by the mixer, and manual mixing is prohibited. However, the ground must be clean, the castable should be added with a coagulant, and the amount of coagulant added is 3%, which on-site construction can add 5% and then add 8% PA80 glue to mix quickly to ensure that it is used up within 10 minutes.

4. Before pouring, first do a good job of coating the anchor solid with a layer of asphalt and paint, when the pouring thickness is within 250mm, it is advisable to pour to the specified thickness at one time, and vibrate until it is dense and completely compact.

5. The mold must be cleaned before the mold, and the mold should be coated with a layer of oil to carry out the mold.

6. In winter construction, salt or other substances are added as antifreeze agents, which reduces the high-temperature performance of the material, or reasonable antifreeze measures are not taken during winter construction.

It is recommended to use a compulsory mixer for castable mixing, and all mixing tools and mixers must be clean and free of debris.

The main purpose of refractory castable is the lining construction of boiler, generally in the parts that are eroded by molten iron, molten steel and slag and the working temperature is higher, such as tapping trough, steel barrel and blast furnace furnace body, taphole trench, etc., refractory castable made of granular and powdery material with high alumina content and good sintering can be used by low calcium and pure high alumina and low cement.

Refractory castables are essential consumables for industrial furnaces. The main uses are as follows:

Pouring and molding of key parts of the furnace body, such as near the furnace door frame and feeding port.

The molten metal pouring runner is generally cast with castable, and after a period of use, the castable will fall off and need to be repaired regularly.

Refractory castable refers to a mixture composed of refractory aggregate, binder and admixture, which is mixed with water (or liquid binder) to form a mud that can be constructed by pouring method.

The difference with other amorphous refractories is that the refractory castable has a certain coagulation and hardening time after construction, so it needs to be cured for a certain period of time after pouring and molding before it can be demolded, and then it can be put into baking after natural curing for an appropriate time.

Castables classification.

There are many types and names of castables, which can be named according to aggregates, main components, use parts, chemical properties and characteristics, such as: according to refractory aggregates, clay aggregates (Al2O3 30% 45%), high alumina aggregates (Al2O3% 26GE; 45%), siliceous aggregate (SiO2% 26GE; 85%、al2o3%26lt;10%)。

Alkaline aggregates (magnesia, dolomite, etc.), special aggregates (carbon, carbide, spinel, zircon, nitride, etc.) and thermal insulation aggregates (perlite, vermiculite, ceramsite, drifting beads, light brick sand, porous clinker, alumina hollow balls, etc.). According to the binder, there are hydraulic bonding, chemical bonding, agglutination bonding refractory castable.

In addition to aggregates, product classification should also be classified according to porosity or specific gravity, for example: according to the porosity, there are two kinds of thermal insulation refractory castable and thermal insulation refractory castable with porosity of not less than 45%.

Summary. The following is my question for your [composition of refractory castable]: Hello, <> kiss!

The composition of refractory castables is as follows: ultrafine powder, cement, silicon, and aluminum sol, and the use of these materials is special, so it should be used with caution. If it is divided according to the way of construction, it can be divided into self-flowing type and vibration construction type, and according to its material composition, it can also be divided into ultra-low cement, low cement, cement-free, and ordinary refractory castables.

The following is my question for your [composition of refractory castable]: Hello, <> kiss! The composition of the refractory state macro castable is as follows:

There are super-registered micropowder, cement, silicon, and aluminum sol, and the use of these materials is special, so it should be used with caution. If it is divided according to the way of construction, it can be divided into self-flowing type and vibration construction type, and can also be divided into ultra-low cement, low cement, cement-free and ordinary refractory castable according to its material composition.

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The main component of refractory castable is the basic detection of physical and chemical indicators of refractory castable, in the analysis of the composition of refractory slag skin castable, we have talked about the main component of refractory castable, which is the main body of refractory castable, and is the basic and absolute foundation condition that directly determines the refractory performance of refractory raw materials. The composition of refractory castables is divided into main and secondary components, and the basic components that play a major role in the majority are usually called the main components, and the accompanying inclusions in the raw materials and the addition of the process are called the secondary components. For example, high-alumina castables, the main component is aluminum oxide; For example, siliceous castable, the main component is silica, which is an acid refractory castable; Magnesia castable, the main component is magnesium oxide, and so on.

Refractory castables can be divided into the following categories 1, ironmaking system 2, steelmaking system 3, steel rolling system 4, building materials system 5, the application of refractory castable in the petrochemical industry is almost all over the kiln and thermal equipment and structures in various fields, in various industrial sectors, the metallurgical industry kiln is the most, the use conditions are harsh (it is recommended to use the oriental furnace lining castable), and the refractory castable consumed accounts for about 60% of its total output. Refractory castable is one of the most widely produced and used amorphous refractories. It is mainly used to construct various heating furnace linings and other integral structures.

Refractory castables are common, massively used amorphous refractories.

Refractory castable is a non-adhesive mixture composed of aggregate, fine powder and binder. usuallyDelivered in dry materialIt is poured after adding water or other liquids.

Refractory castables can also be classified by material, such as Al2O3-MGO castable, Al2O3-SiC-C castable, etc.; It can also be classified according to use, such as castable material for ladle, iron groove material, etc.; It can also be integrated according to the combination, such as coagulation bonding, hydration bonding castable, etc.

Refractory castables are mainly used for lining pouring in high-temperature kilns, boilers, thermal equipment, etc.

The above is a simple introduction, classification and use of refractory castables by Kanghui Refractories, I hope it can help you.