What is castable refractory mass and what are its types?
Castable refractory mass are a combination of refractory materials and especially refractory cements. These materials are called “casting” because they must be poured into a mold for production. to take their own shape.
The amount of water in the structure of these materials should be enough to easily pour and fill the mold. Therefore, it is expected that a relatively large percentage of water is used for their initial formation.
Alumina is one of the main components of castable refractory mass. The higher the percentage of alumina, the higher the refractory and mechanical resistance of the mass. Bauxite and chamotte are among the primary sources of
alumina.The most important types of castable refractory masses are:
Refractory concrete (alumina aggregates)
Carbon binding masses
Structural masses of chemical bonding
Refractory concrete
Refractory concrete is one of the main types of pouring refractories. These concretes can be porous or compact, and according to their chemical composition, they can be found with the following names:
Ordinary castable concrete (Regular Castable-RC)
Due to the presence of cement, these concretes have a hydraulic grip and do not need a lubricant.
Deflocculated Castable-DC
In the production of these materials, a type of substance is usually used as a lubricant. Fluidized concrete can be based on the percentage of calcium oxide (CaO). have different types. In these materials, the lower the percentage of CaO, the less the amount of cement used in their construction, which makes their setting and hardening process more difficult.These concretes need to be heated to reach raw strength.
Applications of refractory concrete
Refractory industries with high temperature furnaces (steam boiler, aluminum, forging, induction, metal melting, rotary, garbage incinerator, etc.)
Surface coating
Filling irregular volumes and complex forms
Pourable refractory mass with carbon binding
The composition of these masses often includes sinter dolomite, low iron magnesite or molten magnesite. In these crimes, organic adhesives are used, the most common of which is bitumen. There are two forms of carbon joint compounds, cold and hot pourable compounds for filling connections or repairs.
Among the most important materials used in these crimes, we can mention the following:
Converters
Steel casting crucibles
Electric arc furnace
Structural masses of chemical bonding
To make these products from sintered magnesite. Melted magnesite or chromite magnesite and in some cases chromite is used.The percentage of water in these materials is between 6-9%. Silicate, sulfate, phosphate and acid compounds are usually used for chemical bonding of components.
Among the most important applications of these refractories, we can mention the following:
outlet ducts
the corridors
Burner blocks
Refractory casting mass dimensions
Generally, the granularity of these masses is less than 3 or 5 mm. Sometimes troweling method is used to install these objects. Coarse-grained refractory masses are used in the floor and walls of industrial furnaces.
Tips for production and consumption of refractory castables
During the installation of these refractories, if cement with a high drying speed is used, the work speed will increase.
For the construction of refractory lining, it is better to use monolithic concrete to reduce the cost and time of its repairs.
In general, the cost of producing refractory castables is between 30 and 50% of bricks.In the production of these refractories, according to the operating temperature, you should pay attention to the light or heavy nature of the refractory mass
Purchase of refractory mass
In order to inquire about the price, buy advice and place an order for furnace refractory bricks, you can call 09131134667 on the website of Zayandeh Rood Firebrick Company. Shipping in this collection is done by reliable and official shipping companies. If the buyer makes the necessary arrangements,
Address:
Isfahan-Kilometer 8, Habib Abad District-
Sanat St., Zayandeh Rood Nessoz Yekta factories
Phone:
Sales unit: 09131134667
Office phone: 03145882555