REFRACTORIES
Refractories compounds of stuffing are not only useful in the metal industry, but can also be used by engineers, architects. Refractories concrete are almost similar to the original cast lots, but they are designed to create concrete refractory. The raw materials which, when mixed with water is poured and dried to form the Refractories concrete. The ingredients in these concretes made of ground Refractories materials such as fillers, aggregates and additives together by a binder. The bonding agent most commonly used is an alumina cement (HAC). Another alternative to the AHC is colloidal silica. Potting compounds are mixed with water and then poured into the air or firing guns. Normally, the nozzle, cement accelerators are added to promote rapid curing. Today these processing machines are available that can shape refractory concrete poured to the desired shape.
Castable refractories are generally preferred for linings and coatings of irregular dimensions, for masonry and patch for casting specific forms. The composition of refractory concrete depends on the type of application and temperature where they are needed. For high temperature or 900 ° C and 1500 ° C gives more strength and durability compared to the moderate temperature to 500 ° C to 1000 ° C. However, at high temperature, high strength bond ceramic are not trained. It is also noted that for intermediate temperatures Portland cement type can not be used as a binder. Normally, chromium ore or CDT is preferred where high strength is desired in the resulting concrete. For temperatures of 2000 ° C and above carbonacious Refractories are a good option, but they are expensive. The refractory concrete can also be classified according to the CaO content in them.
The industry has developed greatly after the advances in the field of engineering. Every day, engineers around the world to experiment with new ways of building materials that can assist in the development of industries. Since an important role is played by the industrial sector, providing stability to the economy of a country, so there is always a demand for new and recent technological developments related industries. Among the many gifts given to the pressure of the engineering industry is resistant to treatment. Refractories are materials that are capable of maintaining its resistance to extreme temperatures. Usually, these materials are preferably non-metallic ceramic so they are able to work to extremely high or low.
Such material safely brought revolution in the iron and steel, not only that, these materials are also out for the ovens in all industries where the chemical reaction produces presipetates and products are highly acidic in nature or basic with a high or low temperature.
Regular pour rerfractories, also known as conventional cement concrete content generally greater than 2.5% under the cement concretes containing 1-2.5% CaO in them, namely ultra-low cement were 0 , 2.1%. No cement concrete available that contain less than 0.2% CaO. The proportion of cement effects of the strength and durability of concrete. The lower the proportion of CaO, the product is sustainable. Moreover, chemical additives currently used in Refractories concrete can use less water for mixing. A device called permiameter generally used to check the type of concrete. If the type is known, can certainly be their best in their respective field.
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